2443 lines
83 KiB
C++
2443 lines
83 KiB
C++
// -*- C++ -*-
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//===--------------------------- atomic -----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_ATOMIC
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#define _LIBCPP_ATOMIC
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/*
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atomic synopsis
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namespace std
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{
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// feature test macro
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#define __cpp_lib_atomic_is_always_lock_free // as specified by SG10
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// order and consistency
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enum memory_order: unspecified // enum class in C++20
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{
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relaxed,
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consume, // load-consume
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acquire, // load-acquire
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release, // store-release
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acq_rel, // store-release load-acquire
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seq_cst // store-release load-acquire
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};
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inline constexpr auto memory_order_relaxed = memory_order::relaxed;
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inline constexpr auto memory_order_consume = memory_order::consume;
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inline constexpr auto memory_order_acquire = memory_order::acquire;
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inline constexpr auto memory_order_release = memory_order::release;
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inline constexpr auto memory_order_acq_rel = memory_order::acq_rel;
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inline constexpr auto memory_order_seq_cst = memory_order::seq_cst;
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template <class T> T kill_dependency(T y) noexcept;
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// lock-free property
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#define ATOMIC_BOOL_LOCK_FREE unspecified
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#define ATOMIC_CHAR_LOCK_FREE unspecified
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#define ATOMIC_CHAR16_T_LOCK_FREE unspecified
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#define ATOMIC_CHAR32_T_LOCK_FREE unspecified
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#define ATOMIC_WCHAR_T_LOCK_FREE unspecified
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#define ATOMIC_SHORT_LOCK_FREE unspecified
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#define ATOMIC_INT_LOCK_FREE unspecified
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#define ATOMIC_LONG_LOCK_FREE unspecified
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#define ATOMIC_LLONG_LOCK_FREE unspecified
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#define ATOMIC_POINTER_LOCK_FREE unspecified
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// flag type and operations
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typedef struct atomic_flag
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{
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bool test_and_set(memory_order m = memory_order_seq_cst) volatile noexcept;
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bool test_and_set(memory_order m = memory_order_seq_cst) noexcept;
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void clear(memory_order m = memory_order_seq_cst) volatile noexcept;
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void clear(memory_order m = memory_order_seq_cst) noexcept;
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atomic_flag() noexcept = default;
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atomic_flag(const atomic_flag&) = delete;
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atomic_flag& operator=(const atomic_flag&) = delete;
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atomic_flag& operator=(const atomic_flag&) volatile = delete;
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} atomic_flag;
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bool
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atomic_flag_test_and_set(volatile atomic_flag* obj) noexcept;
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bool
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atomic_flag_test_and_set(atomic_flag* obj) noexcept;
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bool
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atomic_flag_test_and_set_explicit(volatile atomic_flag* obj,
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memory_order m) noexcept;
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bool
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atomic_flag_test_and_set_explicit(atomic_flag* obj, memory_order m) noexcept;
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void
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atomic_flag_clear(volatile atomic_flag* obj) noexcept;
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void
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atomic_flag_clear(atomic_flag* obj) noexcept;
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void
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atomic_flag_clear_explicit(volatile atomic_flag* obj, memory_order m) noexcept;
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void
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atomic_flag_clear_explicit(atomic_flag* obj, memory_order m) noexcept;
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#define ATOMIC_FLAG_INIT see below
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#define ATOMIC_VAR_INIT(value) see below
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template <class T>
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struct atomic
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{
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static constexpr bool is_always_lock_free;
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bool is_lock_free() const volatile noexcept;
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bool is_lock_free() const noexcept;
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void store(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
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void store(T desr, memory_order m = memory_order_seq_cst) noexcept;
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T load(memory_order m = memory_order_seq_cst) const volatile noexcept;
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T load(memory_order m = memory_order_seq_cst) const noexcept;
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operator T() const volatile noexcept;
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operator T() const noexcept;
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T exchange(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
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T exchange(T desr, memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_weak(T& expc, T desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_weak(T& expc, T desr, memory_order s, memory_order f) noexcept;
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bool compare_exchange_strong(T& expc, T desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_strong(T& expc, T desr,
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memory_order s, memory_order f) noexcept;
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bool compare_exchange_weak(T& expc, T desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_weak(T& expc, T desr,
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memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_strong(T& expc, T desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_strong(T& expc, T desr,
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memory_order m = memory_order_seq_cst) noexcept;
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atomic() noexcept = default;
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constexpr atomic(T desr) noexcept;
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atomic(const atomic&) = delete;
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atomic& operator=(const atomic&) = delete;
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atomic& operator=(const atomic&) volatile = delete;
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T operator=(T) volatile noexcept;
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T operator=(T) noexcept;
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};
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template <>
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struct atomic<integral>
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{
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static constexpr bool is_always_lock_free;
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bool is_lock_free() const volatile noexcept;
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bool is_lock_free() const noexcept;
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void store(integral desr, memory_order m = memory_order_seq_cst) volatile noexcept;
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void store(integral desr, memory_order m = memory_order_seq_cst) noexcept;
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integral load(memory_order m = memory_order_seq_cst) const volatile noexcept;
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integral load(memory_order m = memory_order_seq_cst) const noexcept;
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operator integral() const volatile noexcept;
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operator integral() const noexcept;
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integral exchange(integral desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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integral exchange(integral desr, memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_weak(integral& expc, integral desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_weak(integral& expc, integral desr,
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memory_order s, memory_order f) noexcept;
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bool compare_exchange_strong(integral& expc, integral desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_strong(integral& expc, integral desr,
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memory_order s, memory_order f) noexcept;
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bool compare_exchange_weak(integral& expc, integral desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_weak(integral& expc, integral desr,
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memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_strong(integral& expc, integral desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_strong(integral& expc, integral desr,
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memory_order m = memory_order_seq_cst) noexcept;
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integral
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fetch_add(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
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integral fetch_add(integral op, memory_order m = memory_order_seq_cst) noexcept;
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integral
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fetch_sub(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
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integral fetch_sub(integral op, memory_order m = memory_order_seq_cst) noexcept;
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integral
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fetch_and(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
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integral fetch_and(integral op, memory_order m = memory_order_seq_cst) noexcept;
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integral
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fetch_or(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
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integral fetch_or(integral op, memory_order m = memory_order_seq_cst) noexcept;
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integral
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fetch_xor(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
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integral fetch_xor(integral op, memory_order m = memory_order_seq_cst) noexcept;
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atomic() noexcept = default;
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constexpr atomic(integral desr) noexcept;
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atomic(const atomic&) = delete;
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atomic& operator=(const atomic&) = delete;
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atomic& operator=(const atomic&) volatile = delete;
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integral operator=(integral desr) volatile noexcept;
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integral operator=(integral desr) noexcept;
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integral operator++(int) volatile noexcept;
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integral operator++(int) noexcept;
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integral operator--(int) volatile noexcept;
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integral operator--(int) noexcept;
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integral operator++() volatile noexcept;
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integral operator++() noexcept;
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integral operator--() volatile noexcept;
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integral operator--() noexcept;
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integral operator+=(integral op) volatile noexcept;
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integral operator+=(integral op) noexcept;
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integral operator-=(integral op) volatile noexcept;
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integral operator-=(integral op) noexcept;
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integral operator&=(integral op) volatile noexcept;
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integral operator&=(integral op) noexcept;
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integral operator|=(integral op) volatile noexcept;
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integral operator|=(integral op) noexcept;
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integral operator^=(integral op) volatile noexcept;
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integral operator^=(integral op) noexcept;
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};
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template <class T>
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struct atomic<T*>
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{
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static constexpr bool is_always_lock_free;
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bool is_lock_free() const volatile noexcept;
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bool is_lock_free() const noexcept;
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void store(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
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void store(T* desr, memory_order m = memory_order_seq_cst) noexcept;
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T* load(memory_order m = memory_order_seq_cst) const volatile noexcept;
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T* load(memory_order m = memory_order_seq_cst) const noexcept;
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operator T*() const volatile noexcept;
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operator T*() const noexcept;
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T* exchange(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
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T* exchange(T* desr, memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_weak(T*& expc, T* desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_weak(T*& expc, T* desr,
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memory_order s, memory_order f) noexcept;
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bool compare_exchange_strong(T*& expc, T* desr,
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memory_order s, memory_order f) volatile noexcept;
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bool compare_exchange_strong(T*& expc, T* desr,
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memory_order s, memory_order f) noexcept;
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bool compare_exchange_weak(T*& expc, T* desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_weak(T*& expc, T* desr,
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memory_order m = memory_order_seq_cst) noexcept;
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bool compare_exchange_strong(T*& expc, T* desr,
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memory_order m = memory_order_seq_cst) volatile noexcept;
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bool compare_exchange_strong(T*& expc, T* desr,
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memory_order m = memory_order_seq_cst) noexcept;
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T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
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T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
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T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
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T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
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atomic() noexcept = default;
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constexpr atomic(T* desr) noexcept;
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atomic(const atomic&) = delete;
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atomic& operator=(const atomic&) = delete;
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atomic& operator=(const atomic&) volatile = delete;
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T* operator=(T*) volatile noexcept;
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T* operator=(T*) noexcept;
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T* operator++(int) volatile noexcept;
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T* operator++(int) noexcept;
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T* operator--(int) volatile noexcept;
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T* operator--(int) noexcept;
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T* operator++() volatile noexcept;
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T* operator++() noexcept;
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T* operator--() volatile noexcept;
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T* operator--() noexcept;
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T* operator+=(ptrdiff_t op) volatile noexcept;
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T* operator+=(ptrdiff_t op) noexcept;
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T* operator-=(ptrdiff_t op) volatile noexcept;
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T* operator-=(ptrdiff_t op) noexcept;
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};
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template <class T>
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bool
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atomic_is_lock_free(const volatile atomic<T>* obj) noexcept;
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template <class T>
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bool
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atomic_is_lock_free(const atomic<T>* obj) noexcept;
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template <class T>
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void
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atomic_init(volatile atomic<T>* obj, T desr) noexcept;
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template <class T>
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void
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atomic_init(atomic<T>* obj, T desr) noexcept;
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template <class T>
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void
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atomic_store(volatile atomic<T>* obj, T desr) noexcept;
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template <class T>
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void
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atomic_store(atomic<T>* obj, T desr) noexcept;
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template <class T>
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void
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atomic_store_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept;
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template <class T>
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void
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atomic_store_explicit(atomic<T>* obj, T desr, memory_order m) noexcept;
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template <class T>
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T
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atomic_load(const volatile atomic<T>* obj) noexcept;
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template <class T>
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T
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atomic_load(const atomic<T>* obj) noexcept;
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template <class T>
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T
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atomic_load_explicit(const volatile atomic<T>* obj, memory_order m) noexcept;
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template <class T>
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T
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atomic_load_explicit(const atomic<T>* obj, memory_order m) noexcept;
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template <class T>
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T
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atomic_exchange(volatile atomic<T>* obj, T desr) noexcept;
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template <class T>
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T
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atomic_exchange(atomic<T>* obj, T desr) noexcept;
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template <class T>
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T
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atomic_exchange_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept;
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template <class T>
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T
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atomic_exchange_explicit(atomic<T>* obj, T desr, memory_order m) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_weak(volatile atomic<T>* obj, T* expc, T desr) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_weak(atomic<T>* obj, T* expc, T desr) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_strong(volatile atomic<T>* obj, T* expc, T desr) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_strong(atomic<T>* obj, T* expc, T desr) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_weak_explicit(volatile atomic<T>* obj, T* expc,
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T desr,
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memory_order s, memory_order f) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_weak_explicit(atomic<T>* obj, T* expc, T desr,
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memory_order s, memory_order f) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_strong_explicit(volatile atomic<T>* obj,
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T* expc, T desr,
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memory_order s, memory_order f) noexcept;
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template <class T>
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bool
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atomic_compare_exchange_strong_explicit(atomic<T>* obj, T* expc,
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T desr,
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memory_order s, memory_order f) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_add(volatile atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_add(atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_add_explicit(volatile atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_add_explicit(atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_sub(volatile atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_sub(atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_sub_explicit(volatile atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_sub_explicit(atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_and(volatile atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_and(atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_and_explicit(volatile atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_and_explicit(atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_or(volatile atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_or(atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_or_explicit(volatile atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_or_explicit(atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_xor(volatile atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_xor(atomic<Integral>* obj, Integral op) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_xor_explicit(volatile atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class Integral>
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Integral
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atomic_fetch_xor_explicit(atomic<Integral>* obj, Integral op,
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memory_order m) noexcept;
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template <class T>
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T*
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atomic_fetch_add(volatile atomic<T*>* obj, ptrdiff_t op) noexcept;
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template <class T>
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T*
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atomic_fetch_add(atomic<T*>* obj, ptrdiff_t op) noexcept;
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template <class T>
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T*
|
|
atomic_fetch_add_explicit(volatile atomic<T*>* obj, ptrdiff_t op,
|
|
memory_order m) noexcept;
|
|
template <class T>
|
|
T*
|
|
atomic_fetch_add_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept;
|
|
|
|
template <class T>
|
|
T*
|
|
atomic_fetch_sub(volatile atomic<T*>* obj, ptrdiff_t op) noexcept;
|
|
|
|
template <class T>
|
|
T*
|
|
atomic_fetch_sub(atomic<T*>* obj, ptrdiff_t op) noexcept;
|
|
|
|
template <class T>
|
|
T*
|
|
atomic_fetch_sub_explicit(volatile atomic<T*>* obj, ptrdiff_t op,
|
|
memory_order m) noexcept;
|
|
template <class T>
|
|
T*
|
|
atomic_fetch_sub_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept;
|
|
|
|
// Atomics for standard typedef types
|
|
|
|
typedef atomic<bool> atomic_bool;
|
|
typedef atomic<char> atomic_char;
|
|
typedef atomic<signed char> atomic_schar;
|
|
typedef atomic<unsigned char> atomic_uchar;
|
|
typedef atomic<short> atomic_short;
|
|
typedef atomic<unsigned short> atomic_ushort;
|
|
typedef atomic<int> atomic_int;
|
|
typedef atomic<unsigned int> atomic_uint;
|
|
typedef atomic<long> atomic_long;
|
|
typedef atomic<unsigned long> atomic_ulong;
|
|
typedef atomic<long long> atomic_llong;
|
|
typedef atomic<unsigned long long> atomic_ullong;
|
|
typedef atomic<char16_t> atomic_char16_t;
|
|
typedef atomic<char32_t> atomic_char32_t;
|
|
typedef atomic<wchar_t> atomic_wchar_t;
|
|
|
|
typedef atomic<int_least8_t> atomic_int_least8_t;
|
|
typedef atomic<uint_least8_t> atomic_uint_least8_t;
|
|
typedef atomic<int_least16_t> atomic_int_least16_t;
|
|
typedef atomic<uint_least16_t> atomic_uint_least16_t;
|
|
typedef atomic<int_least32_t> atomic_int_least32_t;
|
|
typedef atomic<uint_least32_t> atomic_uint_least32_t;
|
|
typedef atomic<int_least64_t> atomic_int_least64_t;
|
|
typedef atomic<uint_least64_t> atomic_uint_least64_t;
|
|
|
|
typedef atomic<int_fast8_t> atomic_int_fast8_t;
|
|
typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
|
|
typedef atomic<int_fast16_t> atomic_int_fast16_t;
|
|
typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
|
|
typedef atomic<int_fast32_t> atomic_int_fast32_t;
|
|
typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
|
|
typedef atomic<int_fast64_t> atomic_int_fast64_t;
|
|
typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
|
|
|
|
typedef atomic<int8_t> atomic_int8_t;
|
|
typedef atomic<uint8_t> atomic_uint8_t;
|
|
typedef atomic<int16_t> atomic_int16_t;
|
|
typedef atomic<uint16_t> atomic_uint16_t;
|
|
typedef atomic<int32_t> atomic_int32_t;
|
|
typedef atomic<uint32_t> atomic_uint32_t;
|
|
typedef atomic<int64_t> atomic_int64_t;
|
|
typedef atomic<uint64_t> atomic_uint64_t;
|
|
|
|
typedef atomic<intptr_t> atomic_intptr_t;
|
|
typedef atomic<uintptr_t> atomic_uintptr_t;
|
|
typedef atomic<size_t> atomic_size_t;
|
|
typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
|
|
typedef atomic<intmax_t> atomic_intmax_t;
|
|
typedef atomic<uintmax_t> atomic_uintmax_t;
|
|
|
|
// fences
|
|
|
|
void atomic_thread_fence(memory_order m) noexcept;
|
|
void atomic_signal_fence(memory_order m) noexcept;
|
|
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__config>
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <type_traits>
|
|
#include <version>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
#ifdef _LIBCPP_HAS_NO_THREADS
|
|
# error <atomic> is not supported on this single threaded system
|
|
#endif
|
|
#ifdef _LIBCPP_HAS_NO_ATOMIC_HEADER
|
|
# error <atomic> is not implemented
|
|
#endif
|
|
#ifdef kill_dependency
|
|
# error C++ standard library is incompatible with <stdatomic.h>
|
|
#endif
|
|
|
|
#define _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) \
|
|
_LIBCPP_DIAGNOSE_WARNING(__m == memory_order_consume || \
|
|
__m == memory_order_acquire || \
|
|
__m == memory_order_acq_rel, \
|
|
"memory order argument to atomic operation is invalid")
|
|
|
|
#define _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) \
|
|
_LIBCPP_DIAGNOSE_WARNING(__m == memory_order_release || \
|
|
__m == memory_order_acq_rel, \
|
|
"memory order argument to atomic operation is invalid")
|
|
|
|
#define _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__m, __f) \
|
|
_LIBCPP_DIAGNOSE_WARNING(__f == memory_order_release || \
|
|
__f == memory_order_acq_rel, \
|
|
"memory order argument to atomic operation is invalid")
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
// Figure out what the underlying type for `memory_order` would be if it were
|
|
// declared as an unscoped enum (accounting for -fshort-enums). Use this result
|
|
// to pin the underlying type in C++20.
|
|
enum __legacy_memory_order {
|
|
__mo_relaxed,
|
|
__mo_consume,
|
|
__mo_acquire,
|
|
__mo_release,
|
|
__mo_acq_rel,
|
|
__mo_seq_cst
|
|
};
|
|
|
|
typedef underlying_type<__legacy_memory_order>::type __memory_order_underlying_t;
|
|
|
|
#if _LIBCPP_STD_VER > 17
|
|
|
|
enum class memory_order : __memory_order_underlying_t {
|
|
relaxed = __mo_relaxed,
|
|
consume = __mo_consume,
|
|
acquire = __mo_acquire,
|
|
release = __mo_release,
|
|
acq_rel = __mo_acq_rel,
|
|
seq_cst = __mo_seq_cst
|
|
};
|
|
|
|
inline constexpr auto memory_order_relaxed = memory_order::relaxed;
|
|
inline constexpr auto memory_order_consume = memory_order::consume;
|
|
inline constexpr auto memory_order_acquire = memory_order::acquire;
|
|
inline constexpr auto memory_order_release = memory_order::release;
|
|
inline constexpr auto memory_order_acq_rel = memory_order::acq_rel;
|
|
inline constexpr auto memory_order_seq_cst = memory_order::seq_cst;
|
|
|
|
#else
|
|
|
|
typedef enum memory_order {
|
|
memory_order_relaxed = __mo_relaxed,
|
|
memory_order_consume = __mo_consume,
|
|
memory_order_acquire = __mo_acquire,
|
|
memory_order_release = __mo_release,
|
|
memory_order_acq_rel = __mo_acq_rel,
|
|
memory_order_seq_cst = __mo_seq_cst,
|
|
} memory_order;
|
|
|
|
#endif // _LIBCPP_STD_VER > 17
|
|
|
|
static_assert((is_same<underlying_type<memory_order>::type, __memory_order_underlying_t>::value),
|
|
"unexpected underlying type for std::memory_order");
|
|
|
|
#if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) || \
|
|
defined(_LIBCPP_ATOMIC_ONLY_USE_BUILTINS)
|
|
|
|
// [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because
|
|
// the default operator= in an object is not volatile, a byte-by-byte copy
|
|
// is required.
|
|
template <typename _Tp, typename _Tv> _LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if<is_assignable<_Tp&, _Tv>::value>::type
|
|
__cxx_atomic_assign_volatile(_Tp& __a_value, _Tv const& __val) {
|
|
__a_value = __val;
|
|
}
|
|
template <typename _Tp, typename _Tv> _LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if<is_assignable<_Tp&, _Tv>::value>::type
|
|
__cxx_atomic_assign_volatile(_Tp volatile& __a_value, _Tv volatile const& __val) {
|
|
volatile char* __to = reinterpret_cast<volatile char*>(&__a_value);
|
|
volatile char* __end = __to + sizeof(_Tp);
|
|
volatile const char* __from = reinterpret_cast<volatile const char*>(&__val);
|
|
while (__to != __end)
|
|
*__to++ = *__from++;
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)
|
|
|
|
template <typename _Tp>
|
|
struct __cxx_atomic_base_impl {
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
__cxx_atomic_base_impl() _NOEXCEPT = default;
|
|
#else
|
|
__cxx_atomic_base_impl() _NOEXCEPT : __a_value() {}
|
|
#endif // _LIBCPP_CXX03_LANG
|
|
_LIBCPP_CONSTEXPR explicit __cxx_atomic_base_impl(_Tp value) _NOEXCEPT
|
|
: __a_value(value) {}
|
|
_Tp __a_value;
|
|
};
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR int __to_gcc_order(memory_order __order) {
|
|
// Avoid switch statement to make this a constexpr.
|
|
return __order == memory_order_relaxed ? __ATOMIC_RELAXED:
|
|
(__order == memory_order_acquire ? __ATOMIC_ACQUIRE:
|
|
(__order == memory_order_release ? __ATOMIC_RELEASE:
|
|
(__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST:
|
|
(__order == memory_order_acq_rel ? __ATOMIC_ACQ_REL:
|
|
__ATOMIC_CONSUME))));
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR int __to_gcc_failure_order(memory_order __order) {
|
|
// Avoid switch statement to make this a constexpr.
|
|
return __order == memory_order_relaxed ? __ATOMIC_RELAXED:
|
|
(__order == memory_order_acquire ? __ATOMIC_ACQUIRE:
|
|
(__order == memory_order_release ? __ATOMIC_RELAXED:
|
|
(__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST:
|
|
(__order == memory_order_acq_rel ? __ATOMIC_ACQUIRE:
|
|
__ATOMIC_CONSUME))));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp __val) {
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __val);
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val) {
|
|
__a->__a_value = __val;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline
|
|
void __cxx_atomic_thread_fence(memory_order __order) {
|
|
__atomic_thread_fence(__to_gcc_order(__order));
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline
|
|
void __cxx_atomic_signal_fence(memory_order __order) {
|
|
__atomic_signal_fence(__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp __val,
|
|
memory_order __order) {
|
|
__atomic_store(&__a->__a_value, &__val,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val,
|
|
memory_order __order) {
|
|
__atomic_store(&__a->__a_value, &__val,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(const volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
memory_order __order) {
|
|
_Tp __ret;
|
|
__atomic_load(&__a->__a_value, &__ret,
|
|
__to_gcc_order(__order));
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(const __cxx_atomic_base_impl<_Tp>* __a, memory_order __order) {
|
|
_Tp __ret;
|
|
__atomic_load(&__a->__a_value, &__ret,
|
|
__to_gcc_order(__order));
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Tp __value, memory_order __order) {
|
|
_Tp __ret;
|
|
__atomic_exchange(&__a->__a_value, &__value, &__ret,
|
|
__to_gcc_order(__order));
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp>* __a, _Tp __value,
|
|
memory_order __order) {
|
|
_Tp __ret;
|
|
__atomic_exchange(&__a->__a_value, &__value, &__ret,
|
|
__to_gcc_order(__order));
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(
|
|
volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value,
|
|
memory_order __success, memory_order __failure) {
|
|
return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
|
|
false,
|
|
__to_gcc_order(__success),
|
|
__to_gcc_failure_order(__failure));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(
|
|
__cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success,
|
|
memory_order __failure) {
|
|
return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
|
|
false,
|
|
__to_gcc_order(__success),
|
|
__to_gcc_failure_order(__failure));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(
|
|
volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value,
|
|
memory_order __success, memory_order __failure) {
|
|
return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
|
|
true,
|
|
__to_gcc_order(__success),
|
|
__to_gcc_failure_order(__failure));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(
|
|
__cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success,
|
|
memory_order __failure) {
|
|
return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
|
|
true,
|
|
__to_gcc_order(__success),
|
|
__to_gcc_failure_order(__failure));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
struct __skip_amt { enum {value = 1}; };
|
|
|
|
template <typename _Tp>
|
|
struct __skip_amt<_Tp*> { enum {value = sizeof(_Tp)}; };
|
|
|
|
// FIXME: Haven't figured out what the spec says about using arrays with
|
|
// atomic_fetch_add. Force a failure rather than creating bad behavior.
|
|
template <typename _Tp>
|
|
struct __skip_amt<_Tp[]> { };
|
|
template <typename _Tp, int n>
|
|
struct __skip_amt<_Tp[n]> { };
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Td __delta, memory_order __order) {
|
|
return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp>* __a, _Td __delta,
|
|
memory_order __order) {
|
|
return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Td __delta, memory_order __order) {
|
|
return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp>* __a, _Td __delta,
|
|
memory_order __order) {
|
|
return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order __order) {
|
|
return __atomic_fetch_and(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order __order) {
|
|
return __atomic_fetch_and(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order __order) {
|
|
return __atomic_fetch_or(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern,
|
|
memory_order __order) {
|
|
return __atomic_fetch_or(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(volatile __cxx_atomic_base_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order __order) {
|
|
return __atomic_fetch_xor(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern,
|
|
memory_order __order) {
|
|
return __atomic_fetch_xor(&__a->__a_value, __pattern,
|
|
__to_gcc_order(__order));
|
|
}
|
|
|
|
#define __cxx_atomic_is_lock_free(__s) __atomic_is_lock_free(__s, 0)
|
|
|
|
#elif defined(_LIBCPP_HAS_C_ATOMIC_IMP)
|
|
|
|
template <typename _Tp>
|
|
struct __cxx_atomic_base_impl {
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
__cxx_atomic_base_impl() _NOEXCEPT = default;
|
|
#else
|
|
__cxx_atomic_base_impl() _NOEXCEPT : __a_value() {}
|
|
#endif // _LIBCPP_CXX03_LANG
|
|
_LIBCPP_CONSTEXPR explicit __cxx_atomic_base_impl(_Tp value) _NOEXCEPT
|
|
: __a_value(value) {}
|
|
_Atomic(_Tp) __a_value;
|
|
};
|
|
|
|
#define __cxx_atomic_is_lock_free(__s) __c11_atomic_is_lock_free(__s)
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline
|
|
void __cxx_atomic_thread_fence(memory_order __order) _NOEXCEPT {
|
|
__c11_atomic_thread_fence(static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY inline
|
|
void __cxx_atomic_signal_fence(memory_order __order) _NOEXCEPT {
|
|
__c11_atomic_signal_fence(static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val) _NOEXCEPT {
|
|
__c11_atomic_init(&__a->__a_value, __val);
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp> * __a, _Tp __val) _NOEXCEPT {
|
|
__c11_atomic_init(&__a->__a_value, __val);
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val, memory_order __order) _NOEXCEPT {
|
|
__c11_atomic_store(&__a->__a_value, __val, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp> * __a, _Tp __val, memory_order __order) _NOEXCEPT {
|
|
__c11_atomic_store(&__a->__a_value, __val, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const volatile* __a, memory_order __order) _NOEXCEPT {
|
|
using __ptr_type = typename remove_const<decltype(__a->__a_value)>::type*;
|
|
return __c11_atomic_load(const_cast<__ptr_type>(&__a->__a_value), static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const* __a, memory_order __order) _NOEXCEPT {
|
|
using __ptr_type = typename remove_const<decltype(__a->__a_value)>::type*;
|
|
return __c11_atomic_load(const_cast<__ptr_type>(&__a->__a_value), static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __value, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_exchange(&__a->__a_value, __value, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp> * __a, _Tp __value, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_exchange(&__a->__a_value, __value, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT {
|
|
return __c11_atomic_compare_exchange_strong(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__failure));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_base_impl<_Tp> * __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT {
|
|
return __c11_atomic_compare_exchange_strong(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__failure));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT {
|
|
return __c11_atomic_compare_exchange_weak(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__failure));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_base_impl<_Tp> * __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT {
|
|
return __c11_atomic_compare_exchange_weak(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__failure));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp> * __a, _Tp __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*> * __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp> * __a, _Tp __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*> * __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_and(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_and(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_or(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_or(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_xor(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
template<class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
|
|
return __c11_atomic_fetch_xor(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order));
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_GCC_ATOMIC_IMP, _LIBCPP_HAS_C_ATOMIC_IMP
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp kill_dependency(_Tp __y) _NOEXCEPT
|
|
{
|
|
return __y;
|
|
}
|
|
|
|
#if defined(__CLANG_ATOMIC_BOOL_LOCK_FREE)
|
|
# define ATOMIC_BOOL_LOCK_FREE __CLANG_ATOMIC_BOOL_LOCK_FREE
|
|
# define ATOMIC_CHAR_LOCK_FREE __CLANG_ATOMIC_CHAR_LOCK_FREE
|
|
# define ATOMIC_CHAR16_T_LOCK_FREE __CLANG_ATOMIC_CHAR16_T_LOCK_FREE
|
|
# define ATOMIC_CHAR32_T_LOCK_FREE __CLANG_ATOMIC_CHAR32_T_LOCK_FREE
|
|
# define ATOMIC_WCHAR_T_LOCK_FREE __CLANG_ATOMIC_WCHAR_T_LOCK_FREE
|
|
# define ATOMIC_SHORT_LOCK_FREE __CLANG_ATOMIC_SHORT_LOCK_FREE
|
|
# define ATOMIC_INT_LOCK_FREE __CLANG_ATOMIC_INT_LOCK_FREE
|
|
# define ATOMIC_LONG_LOCK_FREE __CLANG_ATOMIC_LONG_LOCK_FREE
|
|
# define ATOMIC_LLONG_LOCK_FREE __CLANG_ATOMIC_LLONG_LOCK_FREE
|
|
# define ATOMIC_POINTER_LOCK_FREE __CLANG_ATOMIC_POINTER_LOCK_FREE
|
|
#elif defined(__GCC_ATOMIC_BOOL_LOCK_FREE)
|
|
# define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
|
|
# define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
|
|
# define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
|
|
# define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
|
|
# define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
|
|
# define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
|
|
# define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
|
|
# define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
|
|
# define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
|
|
# define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
|
|
#endif
|
|
|
|
#ifdef _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
|
|
|
|
template<typename _Tp>
|
|
struct __cxx_atomic_lock_impl {
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__cxx_atomic_lock_impl() _NOEXCEPT
|
|
: __a_value(), __a_lock(0) {}
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit
|
|
__cxx_atomic_lock_impl(_Tp value) _NOEXCEPT
|
|
: __a_value(value), __a_lock(0) {}
|
|
|
|
_Tp __a_value;
|
|
mutable __cxx_atomic_base_impl<_LIBCPP_ATOMIC_FLAG_TYPE> __a_lock;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY void __lock() const volatile {
|
|
while(1 == __cxx_atomic_exchange(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(true), memory_order_acquire))
|
|
/*spin*/;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY void __lock() const {
|
|
while(1 == __cxx_atomic_exchange(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(true), memory_order_acquire))
|
|
/*spin*/;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY void __unlock() const volatile {
|
|
__cxx_atomic_store(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(false), memory_order_release);
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY void __unlock() const {
|
|
__cxx_atomic_store(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(false), memory_order_release);
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY _Tp __read() const volatile {
|
|
__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a_value);
|
|
__unlock();
|
|
return __old;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY _Tp __read() const {
|
|
__lock();
|
|
_Tp __old = __a_value;
|
|
__unlock();
|
|
return __old;
|
|
}
|
|
};
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __val) {
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __val);
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_init(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __val) {
|
|
__a->__a_value = __val;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __val, memory_order) {
|
|
__a->__lock();
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __val);
|
|
__a->__unlock();
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __cxx_atomic_store(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __val, memory_order) {
|
|
__a->__lock();
|
|
__a->__a_value = __val;
|
|
__a->__unlock();
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(const volatile __cxx_atomic_lock_impl<_Tp>* __a, memory_order) {
|
|
return __a->__read();
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_load(const __cxx_atomic_lock_impl<_Tp>* __a, memory_order) {
|
|
return __a->__read();
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __value, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __value);
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_exchange(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __value, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value = __value;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp* __expected, _Tp __value, memory_order, memory_order) {
|
|
__a->__lock();
|
|
_Tp temp;
|
|
__cxx_atomic_assign_volatile(temp, __a->__a_value);
|
|
bool __ret = temp == *__expected;
|
|
if(__ret)
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __value);
|
|
else
|
|
__cxx_atomic_assign_volatile(*__expected, __a->__a_value);
|
|
__a->__unlock();
|
|
return __ret;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp* __expected, _Tp __value, memory_order, memory_order) {
|
|
__a->__lock();
|
|
bool __ret = __a->__a_value == *__expected;
|
|
if(__ret)
|
|
__a->__a_value = __value;
|
|
else
|
|
*__expected = __a->__a_value;
|
|
__a->__unlock();
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp* __expected, _Tp __value, memory_order, memory_order) {
|
|
__a->__lock();
|
|
_Tp temp;
|
|
__cxx_atomic_assign_volatile(temp, __a->__a_value);
|
|
bool __ret = temp == *__expected;
|
|
if(__ret)
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __value);
|
|
else
|
|
__cxx_atomic_assign_volatile(*__expected, __a->__a_value);
|
|
__a->__unlock();
|
|
return __ret;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp* __expected, _Tp __value, memory_order, memory_order) {
|
|
__a->__lock();
|
|
bool __ret = __a->__a_value == *__expected;
|
|
if(__ret)
|
|
__a->__a_value = __value;
|
|
else
|
|
*__expected = __a->__a_value;
|
|
__a->__unlock();
|
|
return __ret;
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Td __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old + __delta));
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_add(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Td __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value += __delta;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_add(volatile __cxx_atomic_lock_impl<_Tp*>* __a,
|
|
ptrdiff_t __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp* __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, __old + __delta);
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* __cxx_atomic_fetch_add(__cxx_atomic_lock_impl<_Tp*>* __a,
|
|
ptrdiff_t __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp* __old = __a->__a_value;
|
|
__a->__a_value += __delta;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Td __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old - __delta));
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp, typename _Td>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_sub(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Td __delta, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value -= __delta;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old & __pattern));
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_and(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value &= __pattern;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old | __pattern));
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_or(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value |= __pattern;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(volatile __cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old;
|
|
__cxx_atomic_assign_volatile(__old, __a->__a_value);
|
|
__cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old ^ __pattern));
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
template <typename _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp __cxx_atomic_fetch_xor(__cxx_atomic_lock_impl<_Tp>* __a,
|
|
_Tp __pattern, memory_order) {
|
|
__a->__lock();
|
|
_Tp __old = __a->__a_value;
|
|
__a->__a_value ^= __pattern;
|
|
__a->__unlock();
|
|
return __old;
|
|
}
|
|
|
|
#ifdef __cpp_lib_atomic_is_always_lock_free
|
|
|
|
template<typename _Tp> struct __cxx_is_always_lock_free {
|
|
enum { __value = __atomic_always_lock_free(sizeof(_Tp), 0) }; };
|
|
|
|
#else
|
|
|
|
template<typename _Tp> struct __cxx_is_always_lock_free { enum { __value = false }; };
|
|
// Implementations must match the C ATOMIC_*_LOCK_FREE macro values.
|
|
template<> struct __cxx_is_always_lock_free<bool> { enum { __value = 2 == ATOMIC_BOOL_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<signed char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<unsigned char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<char16_t> { enum { __value = 2 == ATOMIC_CHAR16_T_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<char32_t> { enum { __value = 2 == ATOMIC_CHAR32_T_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<wchar_t> { enum { __value = 2 == ATOMIC_WCHAR_T_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<short> { enum { __value = 2 == ATOMIC_SHORT_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<unsigned short> { enum { __value = 2 == ATOMIC_SHORT_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<int> { enum { __value = 2 == ATOMIC_INT_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<unsigned int> { enum { __value = 2 == ATOMIC_INT_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<long> { enum { __value = 2 == ATOMIC_LONG_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<unsigned long> { enum { __value = 2 == ATOMIC_LONG_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<long long> { enum { __value = 2 == ATOMIC_LLONG_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<unsigned long long> { enum { __value = 2 == ATOMIC_LLONG_LOCK_FREE }; };
|
|
template<typename _Tp> struct __cxx_is_always_lock_free<_Tp*> { enum { __value = 2 == ATOMIC_POINTER_LOCK_FREE }; };
|
|
template<> struct __cxx_is_always_lock_free<std::nullptr_t> { enum { __value = 2 == ATOMIC_POINTER_LOCK_FREE }; };
|
|
|
|
#endif //__cpp_lib_atomic_is_always_lock_free
|
|
|
|
template <typename _Tp,
|
|
typename _Base = typename conditional<__cxx_is_always_lock_free<_Tp>::__value,
|
|
__cxx_atomic_base_impl<_Tp>,
|
|
__cxx_atomic_lock_impl<_Tp> >::type>
|
|
#else
|
|
template <typename _Tp,
|
|
typename _Base = __cxx_atomic_base_impl<_Tp> >
|
|
#endif //_LIBCPP_ATOMIC_ONLY_USE_BUILTINS
|
|
struct __cxx_atomic_impl : public _Base {
|
|
|
|
#if _GNUC_VER >= 501
|
|
static_assert(is_trivially_copyable<_Tp>::value,
|
|
"std::atomic<Tp> requires that 'Tp' be a trivially copyable type");
|
|
#endif
|
|
|
|
_LIBCPP_INLINE_VISIBILITY __cxx_atomic_impl() _NOEXCEPT _LIBCPP_DEFAULT
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit __cxx_atomic_impl(_Tp value) _NOEXCEPT
|
|
: _Base(value) {}
|
|
};
|
|
|
|
// general atomic<T>
|
|
|
|
template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>
|
|
struct __atomic_base // false
|
|
{
|
|
mutable __cxx_atomic_impl<_Tp> __a_;
|
|
|
|
#if defined(__cpp_lib_atomic_is_always_lock_free)
|
|
static _LIBCPP_CONSTEXPR bool is_always_lock_free = __atomic_always_lock_free(sizeof(__a_), 0);
|
|
#endif
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool is_lock_free() const volatile _NOEXCEPT
|
|
{return __cxx_atomic_is_lock_free(sizeof(_Tp));}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool is_lock_free() const _NOEXCEPT
|
|
{return static_cast<__atomic_base const volatile*>(this)->is_lock_free();}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void store(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
_LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
|
|
{__cxx_atomic_store(&__a_, __d, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void store(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
_LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
|
|
{__cxx_atomic_store(&__a_, __d, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp load(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT
|
|
_LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m)
|
|
{return __cxx_atomic_load(&__a_, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp load(memory_order __m = memory_order_seq_cst) const _NOEXCEPT
|
|
_LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m)
|
|
{return __cxx_atomic_load(&__a_, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
operator _Tp() const volatile _NOEXCEPT {return load();}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
operator _Tp() const _NOEXCEPT {return load();}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_exchange(&__a_, __d, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_exchange(&__a_, __d, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_weak(_Tp& __e, _Tp __d,
|
|
memory_order __s, memory_order __f) volatile _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_weak(_Tp& __e, _Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_strong(_Tp& __e, _Tp __d,
|
|
memory_order __s, memory_order __f) volatile _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_strong(_Tp& __e, _Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_weak(_Tp& __e, _Tp __d,
|
|
memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_weak(_Tp& __e, _Tp __d,
|
|
memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_strong(_Tp& __e, _Tp __d,
|
|
memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool compare_exchange_strong(_Tp& __e, _Tp __d,
|
|
memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__atomic_base() _NOEXCEPT _LIBCPP_DEFAULT
|
|
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
__atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {}
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
__atomic_base(const __atomic_base&) = delete;
|
|
__atomic_base& operator=(const __atomic_base&) = delete;
|
|
__atomic_base& operator=(const __atomic_base&) volatile = delete;
|
|
#else
|
|
private:
|
|
__atomic_base(const __atomic_base&);
|
|
__atomic_base& operator=(const __atomic_base&);
|
|
__atomic_base& operator=(const __atomic_base&) volatile;
|
|
#endif
|
|
};
|
|
|
|
#if defined(__cpp_lib_atomic_is_always_lock_free)
|
|
template <class _Tp, bool __b>
|
|
_LIBCPP_CONSTEXPR bool __atomic_base<_Tp, __b>::is_always_lock_free;
|
|
#endif
|
|
|
|
// atomic<Integral>
|
|
|
|
template <class _Tp>
|
|
struct __atomic_base<_Tp, true>
|
|
: public __atomic_base<_Tp, false>
|
|
{
|
|
typedef __atomic_base<_Tp, false> __base;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__atomic_base() _NOEXCEPT _LIBCPP_DEFAULT
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_add(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_add(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_and(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_and(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_or(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_or(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_xor(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_xor(&this->__a_, __op, __m);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator++(int) volatile _NOEXCEPT {return fetch_add(_Tp(1));}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator++(int) _NOEXCEPT {return fetch_add(_Tp(1));}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator--(int) volatile _NOEXCEPT {return fetch_sub(_Tp(1));}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator--(int) _NOEXCEPT {return fetch_sub(_Tp(1));}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator++() volatile _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator++() _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator--() volatile _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator--() _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator+=(_Tp __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator+=(_Tp __op) _NOEXCEPT {return fetch_add(__op) + __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator-=(_Tp __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator-=(_Tp __op) _NOEXCEPT {return fetch_sub(__op) - __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator&=(_Tp __op) volatile _NOEXCEPT {return fetch_and(__op) & __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator&=(_Tp __op) _NOEXCEPT {return fetch_and(__op) & __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator|=(_Tp __op) volatile _NOEXCEPT {return fetch_or(__op) | __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator|=(_Tp __op) _NOEXCEPT {return fetch_or(__op) | __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator^=(_Tp __op) volatile _NOEXCEPT {return fetch_xor(__op) ^ __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator^=(_Tp __op) _NOEXCEPT {return fetch_xor(__op) ^ __op;}
|
|
};
|
|
|
|
// atomic<T>
|
|
|
|
template <class _Tp>
|
|
struct atomic
|
|
: public __atomic_base<_Tp>
|
|
{
|
|
typedef __atomic_base<_Tp> __base;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
atomic() _NOEXCEPT _LIBCPP_DEFAULT
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_CONSTEXPR atomic(_Tp __d) _NOEXCEPT : __base(__d) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator=(_Tp __d) volatile _NOEXCEPT
|
|
{__base::store(__d); return __d;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp operator=(_Tp __d) _NOEXCEPT
|
|
{__base::store(__d); return __d;}
|
|
};
|
|
|
|
// atomic<T*>
|
|
|
|
template <class _Tp>
|
|
struct atomic<_Tp*>
|
|
: public __atomic_base<_Tp*>
|
|
{
|
|
typedef __atomic_base<_Tp*> __base;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
atomic() _NOEXCEPT _LIBCPP_DEFAULT
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_CONSTEXPR atomic(_Tp* __d) _NOEXCEPT : __base(__d) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator=(_Tp* __d) volatile _NOEXCEPT
|
|
{__base::store(__d); return __d;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator=(_Tp* __d) _NOEXCEPT
|
|
{__base::store(__d); return __d;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
|
|
volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_add(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_add(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
|
|
volatile _NOEXCEPT
|
|
{return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator++(int) volatile _NOEXCEPT {return fetch_add(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator++(int) _NOEXCEPT {return fetch_add(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator--(int) volatile _NOEXCEPT {return fetch_sub(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator--(int) _NOEXCEPT {return fetch_sub(1);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator++() volatile _NOEXCEPT {return fetch_add(1) + 1;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator++() _NOEXCEPT {return fetch_add(1) + 1;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator--() volatile _NOEXCEPT {return fetch_sub(1) - 1;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator--() _NOEXCEPT {return fetch_sub(1) - 1;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator+=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator+=(ptrdiff_t __op) _NOEXCEPT {return fetch_add(__op) + __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator-=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp* operator-=(ptrdiff_t __op) _NOEXCEPT {return fetch_sub(__op) - __op;}
|
|
};
|
|
|
|
// atomic_is_lock_free
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_is_lock_free(const volatile atomic<_Tp>* __o) _NOEXCEPT
|
|
{
|
|
return __o->is_lock_free();
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_is_lock_free(const atomic<_Tp>* __o) _NOEXCEPT
|
|
{
|
|
return __o->is_lock_free();
|
|
}
|
|
|
|
// atomic_init
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_init(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
__cxx_atomic_init(&__o->__a_, __d);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_init(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
__cxx_atomic_init(&__o->__a_, __d);
|
|
}
|
|
|
|
// atomic_store
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_store(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
__o->store(__d);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_store(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
__o->store(__d);
|
|
}
|
|
|
|
// atomic_store_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_store_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
|
|
_LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
|
|
{
|
|
__o->store(__d, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_store_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
|
|
_LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
|
|
{
|
|
__o->store(__d, __m);
|
|
}
|
|
|
|
// atomic_load
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_load(const volatile atomic<_Tp>* __o) _NOEXCEPT
|
|
{
|
|
return __o->load();
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_load(const atomic<_Tp>* __o) _NOEXCEPT
|
|
{
|
|
return __o->load();
|
|
}
|
|
|
|
// atomic_load_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_load_explicit(const volatile atomic<_Tp>* __o, memory_order __m) _NOEXCEPT
|
|
_LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m)
|
|
{
|
|
return __o->load(__m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_load_explicit(const atomic<_Tp>* __o, memory_order __m) _NOEXCEPT
|
|
_LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m)
|
|
{
|
|
return __o->load(__m);
|
|
}
|
|
|
|
// atomic_exchange
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_exchange(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->exchange(__d);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_exchange(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->exchange(__d);
|
|
}
|
|
|
|
// atomic_exchange_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_exchange_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->exchange(__d, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp
|
|
atomic_exchange_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->exchange(__d, __m);
|
|
}
|
|
|
|
// atomic_compare_exchange_weak
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_weak(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->compare_exchange_weak(*__e, __d);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_weak(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->compare_exchange_weak(*__e, __d);
|
|
}
|
|
|
|
// atomic_compare_exchange_strong
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_strong(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->compare_exchange_strong(*__e, __d);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_strong(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
|
|
{
|
|
return __o->compare_exchange_strong(*__e, __d);
|
|
}
|
|
|
|
// atomic_compare_exchange_weak_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_weak_explicit(volatile atomic<_Tp>* __o, _Tp* __e,
|
|
_Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{
|
|
return __o->compare_exchange_weak(*__e, __d, __s, __f);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_weak_explicit(atomic<_Tp>* __o, _Tp* __e, _Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{
|
|
return __o->compare_exchange_weak(*__e, __d, __s, __f);
|
|
}
|
|
|
|
// atomic_compare_exchange_strong_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_strong_explicit(volatile atomic<_Tp>* __o,
|
|
_Tp* __e, _Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{
|
|
return __o->compare_exchange_strong(*__e, __d, __s, __f);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_compare_exchange_strong_explicit(atomic<_Tp>* __o, _Tp* __e,
|
|
_Tp __d,
|
|
memory_order __s, memory_order __f) _NOEXCEPT
|
|
_LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f)
|
|
{
|
|
return __o->compare_exchange_strong(*__e, __d, __s, __f);
|
|
}
|
|
|
|
// atomic_fetch_add
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_add(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_add(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_add(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_add(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op);
|
|
}
|
|
|
|
// atomic_fetch_add_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_add_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_add_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
|
|
memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_add_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_add(__op, __m);
|
|
}
|
|
|
|
// atomic_fetch_sub
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_sub(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_sub(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_sub(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_sub(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op);
|
|
}
|
|
|
|
// atomic_fetch_sub_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_sub_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_sub_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_sub_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
|
|
memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp*
|
|
atomic_fetch_sub_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_sub(__op, __m);
|
|
}
|
|
|
|
// atomic_fetch_and
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_and(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_and(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_and(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_and(__op);
|
|
}
|
|
|
|
// atomic_fetch_and_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_and_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_and(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_and_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_and(__op, __m);
|
|
}
|
|
|
|
// atomic_fetch_or
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_or(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_or(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_or(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_or(__op);
|
|
}
|
|
|
|
// atomic_fetch_or_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_or_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_or(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_or_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_or(__op, __m);
|
|
}
|
|
|
|
// atomic_fetch_xor
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_xor(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_xor(__op);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_xor(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
|
|
{
|
|
return __o->fetch_xor(__op);
|
|
}
|
|
|
|
// atomic_fetch_xor_explicit
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_xor_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_xor(__op, __m);
|
|
}
|
|
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
|
|
_Tp
|
|
>::type
|
|
atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->fetch_xor(__op, __m);
|
|
}
|
|
|
|
// flag type and operations
|
|
|
|
typedef struct atomic_flag
|
|
{
|
|
__cxx_atomic_impl<_LIBCPP_ATOMIC_FLAG_TYPE> __a_;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool test_and_set(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{return __cxx_atomic_exchange(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(true), __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool test_and_set(memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{return __cxx_atomic_exchange(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(true), __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void clear(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
|
|
{__cxx_atomic_store(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(false), __m);}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void clear(memory_order __m = memory_order_seq_cst) _NOEXCEPT
|
|
{__cxx_atomic_store(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(false), __m);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
atomic_flag() _NOEXCEPT _LIBCPP_DEFAULT
|
|
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} // EXTENSION
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
atomic_flag(const atomic_flag&) = delete;
|
|
atomic_flag& operator=(const atomic_flag&) = delete;
|
|
atomic_flag& operator=(const atomic_flag&) volatile = delete;
|
|
#else
|
|
private:
|
|
atomic_flag(const atomic_flag&);
|
|
atomic_flag& operator=(const atomic_flag&);
|
|
atomic_flag& operator=(const atomic_flag&) volatile;
|
|
#endif
|
|
} atomic_flag;
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_flag_test_and_set(volatile atomic_flag* __o) _NOEXCEPT
|
|
{
|
|
return __o->test_and_set();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_flag_test_and_set(atomic_flag* __o) _NOEXCEPT
|
|
{
|
|
return __o->test_and_set();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->test_and_set(__m);
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT
|
|
{
|
|
return __o->test_and_set(__m);
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_flag_clear(volatile atomic_flag* __o) _NOEXCEPT
|
|
{
|
|
__o->clear();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_flag_clear(atomic_flag* __o) _NOEXCEPT
|
|
{
|
|
__o->clear();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT
|
|
{
|
|
__o->clear(__m);
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT
|
|
{
|
|
__o->clear(__m);
|
|
}
|
|
|
|
// fences
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_thread_fence(memory_order __m) _NOEXCEPT
|
|
{
|
|
__cxx_atomic_thread_fence(__m);
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
atomic_signal_fence(memory_order __m) _NOEXCEPT
|
|
{
|
|
__cxx_atomic_signal_fence(__m);
|
|
}
|
|
|
|
// Atomics for standard typedef types
|
|
|
|
typedef atomic<bool> atomic_bool;
|
|
typedef atomic<char> atomic_char;
|
|
typedef atomic<signed char> atomic_schar;
|
|
typedef atomic<unsigned char> atomic_uchar;
|
|
typedef atomic<short> atomic_short;
|
|
typedef atomic<unsigned short> atomic_ushort;
|
|
typedef atomic<int> atomic_int;
|
|
typedef atomic<unsigned int> atomic_uint;
|
|
typedef atomic<long> atomic_long;
|
|
typedef atomic<unsigned long> atomic_ulong;
|
|
typedef atomic<long long> atomic_llong;
|
|
typedef atomic<unsigned long long> atomic_ullong;
|
|
typedef atomic<char16_t> atomic_char16_t;
|
|
typedef atomic<char32_t> atomic_char32_t;
|
|
typedef atomic<wchar_t> atomic_wchar_t;
|
|
|
|
typedef atomic<int_least8_t> atomic_int_least8_t;
|
|
typedef atomic<uint_least8_t> atomic_uint_least8_t;
|
|
typedef atomic<int_least16_t> atomic_int_least16_t;
|
|
typedef atomic<uint_least16_t> atomic_uint_least16_t;
|
|
typedef atomic<int_least32_t> atomic_int_least32_t;
|
|
typedef atomic<uint_least32_t> atomic_uint_least32_t;
|
|
typedef atomic<int_least64_t> atomic_int_least64_t;
|
|
typedef atomic<uint_least64_t> atomic_uint_least64_t;
|
|
|
|
typedef atomic<int_fast8_t> atomic_int_fast8_t;
|
|
typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
|
|
typedef atomic<int_fast16_t> atomic_int_fast16_t;
|
|
typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
|
|
typedef atomic<int_fast32_t> atomic_int_fast32_t;
|
|
typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
|
|
typedef atomic<int_fast64_t> atomic_int_fast64_t;
|
|
typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
|
|
|
|
typedef atomic< int8_t> atomic_int8_t;
|
|
typedef atomic<uint8_t> atomic_uint8_t;
|
|
typedef atomic< int16_t> atomic_int16_t;
|
|
typedef atomic<uint16_t> atomic_uint16_t;
|
|
typedef atomic< int32_t> atomic_int32_t;
|
|
typedef atomic<uint32_t> atomic_uint32_t;
|
|
typedef atomic< int64_t> atomic_int64_t;
|
|
typedef atomic<uint64_t> atomic_uint64_t;
|
|
|
|
typedef atomic<intptr_t> atomic_intptr_t;
|
|
typedef atomic<uintptr_t> atomic_uintptr_t;
|
|
typedef atomic<size_t> atomic_size_t;
|
|
typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
|
|
typedef atomic<intmax_t> atomic_intmax_t;
|
|
typedef atomic<uintmax_t> atomic_uintmax_t;
|
|
|
|
#define ATOMIC_FLAG_INIT {false}
|
|
#define ATOMIC_VAR_INIT(__v) {__v}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_ATOMIC
|