724 lines
21 KiB
C
724 lines
21 KiB
C
/*-
|
|
* Copyright (c) 1998 Doug Rabson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#ifndef _MACHINE_ATOMIC_H_
|
|
#define _MACHINE_ATOMIC_H_
|
|
|
|
#ifndef _SYS_CDEFS_H_
|
|
#error this file needs sys/cdefs.h as a prerequisite
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
#include <machine/md_var.h>
|
|
#include <machine/specialreg.h>
|
|
#endif
|
|
|
|
#define mb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc")
|
|
#define wmb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc")
|
|
#define rmb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc")
|
|
|
|
/*
|
|
* Various simple operations on memory, each of which is atomic in the
|
|
* presence of interrupts and multiple processors.
|
|
*
|
|
* atomic_set_char(P, V) (*(u_char *)(P) |= (V))
|
|
* atomic_clear_char(P, V) (*(u_char *)(P) &= ~(V))
|
|
* atomic_add_char(P, V) (*(u_char *)(P) += (V))
|
|
* atomic_subtract_char(P, V) (*(u_char *)(P) -= (V))
|
|
*
|
|
* atomic_set_short(P, V) (*(u_short *)(P) |= (V))
|
|
* atomic_clear_short(P, V) (*(u_short *)(P) &= ~(V))
|
|
* atomic_add_short(P, V) (*(u_short *)(P) += (V))
|
|
* atomic_subtract_short(P, V) (*(u_short *)(P) -= (V))
|
|
*
|
|
* atomic_set_int(P, V) (*(u_int *)(P) |= (V))
|
|
* atomic_clear_int(P, V) (*(u_int *)(P) &= ~(V))
|
|
* atomic_add_int(P, V) (*(u_int *)(P) += (V))
|
|
* atomic_subtract_int(P, V) (*(u_int *)(P) -= (V))
|
|
* atomic_swap_int(P, V) (return (*(u_int *)(P)); *(u_int *)(P) = (V);)
|
|
* atomic_readandclear_int(P) (return (*(u_int *)(P)); *(u_int *)(P) = 0;)
|
|
*
|
|
* atomic_set_long(P, V) (*(u_long *)(P) |= (V))
|
|
* atomic_clear_long(P, V) (*(u_long *)(P) &= ~(V))
|
|
* atomic_add_long(P, V) (*(u_long *)(P) += (V))
|
|
* atomic_subtract_long(P, V) (*(u_long *)(P) -= (V))
|
|
* atomic_swap_long(P, V) (return (*(u_long *)(P)); *(u_long *)(P) = (V);)
|
|
* atomic_readandclear_long(P) (return (*(u_long *)(P)); *(u_long *)(P) = 0;)
|
|
*/
|
|
|
|
/*
|
|
* The above functions are expanded inline in the statically-linked
|
|
* kernel. Lock prefixes are generated if an SMP kernel is being
|
|
* built.
|
|
*
|
|
* Kernel modules call real functions which are built into the kernel.
|
|
* This allows kernel modules to be portable between UP and SMP systems.
|
|
*/
|
|
#if defined(KLD_MODULE) || !defined(__GNUCLIKE_ASM)
|
|
#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \
|
|
void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v); \
|
|
void atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)
|
|
|
|
int atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src);
|
|
u_int atomic_fetchadd_int(volatile u_int *p, u_int v);
|
|
int atomic_testandset_int(volatile u_int *p, u_int v);
|
|
|
|
#define ATOMIC_LOAD(TYPE, LOP) \
|
|
u_##TYPE atomic_load_acq_##TYPE(volatile u_##TYPE *p)
|
|
#define ATOMIC_STORE(TYPE) \
|
|
void atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)
|
|
|
|
int atomic_cmpset_64(volatile uint64_t *, uint64_t, uint64_t);
|
|
uint64_t atomic_load_acq_64(volatile uint64_t *);
|
|
void atomic_store_rel_64(volatile uint64_t *, uint64_t);
|
|
uint64_t atomic_swap_64(volatile uint64_t *, uint64_t);
|
|
|
|
#else /* !KLD_MODULE && __GNUCLIKE_ASM */
|
|
|
|
/*
|
|
* For userland, always use lock prefixes so that the binaries will run
|
|
* on both SMP and !SMP systems.
|
|
*/
|
|
#if defined(SMP) || !defined(_KERNEL)
|
|
#define MPLOCKED "lock ; "
|
|
#else
|
|
#define MPLOCKED
|
|
#endif
|
|
|
|
/*
|
|
* The assembly is volatilized to avoid code chunk removal by the compiler.
|
|
* GCC aggressively reorders operations and memory clobbering is necessary
|
|
* in order to avoid that for memory barriers.
|
|
*/
|
|
#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \
|
|
static __inline void \
|
|
atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
|
|
{ \
|
|
__asm __volatile(MPLOCKED OP \
|
|
: "+m" (*p) \
|
|
: CONS (V) \
|
|
: "cc"); \
|
|
} \
|
|
\
|
|
static __inline void \
|
|
atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
|
|
{ \
|
|
__asm __volatile(MPLOCKED OP \
|
|
: "+m" (*p) \
|
|
: CONS (V) \
|
|
: "memory", "cc"); \
|
|
} \
|
|
struct __hack
|
|
|
|
/*
|
|
* Atomic compare and set, used by the mutex functions
|
|
*
|
|
* if (*dst == expect) *dst = src (all 32 bit words)
|
|
*
|
|
* Returns 0 on failure, non-zero on success
|
|
*/
|
|
|
|
#ifdef CPU_DISABLE_CMPXCHG
|
|
|
|
static __inline int
|
|
atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src)
|
|
{
|
|
u_char res;
|
|
|
|
__asm __volatile(
|
|
" pushfl ; "
|
|
" cli ; "
|
|
" cmpl %3,%1 ; "
|
|
" jne 1f ; "
|
|
" movl %2,%1 ; "
|
|
"1: "
|
|
" sete %0 ; "
|
|
" popfl ; "
|
|
"# atomic_cmpset_int"
|
|
: "=q" (res), /* 0 */
|
|
"+m" (*dst) /* 1 */
|
|
: "r" (src), /* 2 */
|
|
"r" (expect) /* 3 */
|
|
: "memory");
|
|
return (res);
|
|
}
|
|
|
|
#else /* !CPU_DISABLE_CMPXCHG */
|
|
|
|
static __inline int
|
|
atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src)
|
|
{
|
|
u_char res;
|
|
|
|
__asm __volatile(
|
|
" " MPLOCKED " "
|
|
" cmpxchgl %3,%1 ; "
|
|
" sete %0 ; "
|
|
"# atomic_cmpset_int"
|
|
: "=q" (res), /* 0 */
|
|
"+m" (*dst), /* 1 */
|
|
"+a" (expect) /* 2 */
|
|
: "r" (src) /* 3 */
|
|
: "memory", "cc");
|
|
return (res);
|
|
}
|
|
|
|
#endif /* CPU_DISABLE_CMPXCHG */
|
|
|
|
/*
|
|
* Atomically add the value of v to the integer pointed to by p and return
|
|
* the previous value of *p.
|
|
*/
|
|
static __inline u_int
|
|
atomic_fetchadd_int(volatile u_int *p, u_int v)
|
|
{
|
|
|
|
__asm __volatile(
|
|
" " MPLOCKED " "
|
|
" xaddl %0,%1 ; "
|
|
"# atomic_fetchadd_int"
|
|
: "+r" (v), /* 0 */
|
|
"+m" (*p) /* 1 */
|
|
: : "cc");
|
|
return (v);
|
|
}
|
|
|
|
static __inline int
|
|
atomic_testandset_int(volatile u_int *p, u_int v)
|
|
{
|
|
u_char res;
|
|
|
|
__asm __volatile(
|
|
" " MPLOCKED " "
|
|
" btsl %2,%1 ; "
|
|
" setc %0 ; "
|
|
"# atomic_testandset_int"
|
|
: "=q" (res), /* 0 */
|
|
"+m" (*p) /* 1 */
|
|
: "Ir" (v & 0x1f) /* 2 */
|
|
: "cc");
|
|
return (res);
|
|
}
|
|
|
|
/*
|
|
* We assume that a = b will do atomic loads and stores. Due to the
|
|
* IA32 memory model, a simple store guarantees release semantics.
|
|
*
|
|
* However, loads may pass stores, so for atomic_load_acq we have to
|
|
* ensure a Store/Load barrier to do the load in SMP kernels. We use
|
|
* "lock cmpxchg" as recommended by the AMD Software Optimization
|
|
* Guide, and not mfence. For UP kernels, however, the cache of the
|
|
* single processor is always consistent, so we only need to take care
|
|
* of the compiler.
|
|
*/
|
|
#define ATOMIC_STORE(TYPE) \
|
|
static __inline void \
|
|
atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
|
|
{ \
|
|
__compiler_membar(); \
|
|
*p = v; \
|
|
} \
|
|
struct __hack
|
|
|
|
#if defined(_KERNEL) && !defined(SMP)
|
|
|
|
#define ATOMIC_LOAD(TYPE, LOP) \
|
|
static __inline u_##TYPE \
|
|
atomic_load_acq_##TYPE(volatile u_##TYPE *p) \
|
|
{ \
|
|
u_##TYPE tmp; \
|
|
\
|
|
tmp = *p; \
|
|
__compiler_membar(); \
|
|
return (tmp); \
|
|
} \
|
|
struct __hack
|
|
|
|
#else /* !(_KERNEL && !SMP) */
|
|
|
|
#define ATOMIC_LOAD(TYPE, LOP) \
|
|
static __inline u_##TYPE \
|
|
atomic_load_acq_##TYPE(volatile u_##TYPE *p) \
|
|
{ \
|
|
u_##TYPE res; \
|
|
\
|
|
__asm __volatile(MPLOCKED LOP \
|
|
: "=a" (res), /* 0 */ \
|
|
"+m" (*p) /* 1 */ \
|
|
: : "memory", "cc"); \
|
|
return (res); \
|
|
} \
|
|
struct __hack
|
|
|
|
#endif /* _KERNEL && !SMP */
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#ifdef WANT_FUNCTIONS
|
|
int atomic_cmpset_64_i386(volatile uint64_t *, uint64_t, uint64_t);
|
|
int atomic_cmpset_64_i586(volatile uint64_t *, uint64_t, uint64_t);
|
|
uint64_t atomic_load_acq_64_i386(volatile uint64_t *);
|
|
uint64_t atomic_load_acq_64_i586(volatile uint64_t *);
|
|
void atomic_store_rel_64_i386(volatile uint64_t *, uint64_t);
|
|
void atomic_store_rel_64_i586(volatile uint64_t *, uint64_t);
|
|
uint64_t atomic_swap_64_i386(volatile uint64_t *, uint64_t);
|
|
uint64_t atomic_swap_64_i586(volatile uint64_t *, uint64_t);
|
|
#endif
|
|
|
|
/* I486 does not support SMP or CMPXCHG8B. */
|
|
static __inline int
|
|
atomic_cmpset_64_i386(volatile uint64_t *dst, uint64_t expect, uint64_t src)
|
|
{
|
|
volatile uint32_t *p;
|
|
u_char res;
|
|
|
|
p = (volatile uint32_t *)dst;
|
|
__asm __volatile(
|
|
" pushfl ; "
|
|
" cli ; "
|
|
" xorl %1,%%eax ; "
|
|
" xorl %2,%%edx ; "
|
|
" orl %%edx,%%eax ; "
|
|
" jne 1f ; "
|
|
" movl %4,%1 ; "
|
|
" movl %5,%2 ; "
|
|
"1: "
|
|
" sete %3 ; "
|
|
" popfl"
|
|
: "+A" (expect), /* 0 */
|
|
"+m" (*p), /* 1 */
|
|
"+m" (*(p + 1)), /* 2 */
|
|
"=q" (res) /* 3 */
|
|
: "r" ((uint32_t)src), /* 4 */
|
|
"r" ((uint32_t)(src >> 32)) /* 5 */
|
|
: "memory", "cc");
|
|
return (res);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_acq_64_i386(volatile uint64_t *p)
|
|
{
|
|
volatile uint32_t *q;
|
|
uint64_t res;
|
|
|
|
q = (volatile uint32_t *)p;
|
|
__asm __volatile(
|
|
" pushfl ; "
|
|
" cli ; "
|
|
" movl %1,%%eax ; "
|
|
" movl %2,%%edx ; "
|
|
" popfl"
|
|
: "=&A" (res) /* 0 */
|
|
: "m" (*q), /* 1 */
|
|
"m" (*(q + 1)) /* 2 */
|
|
: "memory");
|
|
return (res);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_64_i386(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
volatile uint32_t *q;
|
|
|
|
q = (volatile uint32_t *)p;
|
|
__asm __volatile(
|
|
" pushfl ; "
|
|
" cli ; "
|
|
" movl %%eax,%0 ; "
|
|
" movl %%edx,%1 ; "
|
|
" popfl"
|
|
: "=m" (*q), /* 0 */
|
|
"=m" (*(q + 1)) /* 1 */
|
|
: "A" (v) /* 2 */
|
|
: "memory");
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_swap_64_i386(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
volatile uint32_t *q;
|
|
uint64_t res;
|
|
|
|
q = (volatile uint32_t *)p;
|
|
__asm __volatile(
|
|
" pushfl ; "
|
|
" cli ; "
|
|
" movl %1,%%eax ; "
|
|
" movl %2,%%edx ; "
|
|
" movl %4,%2 ; "
|
|
" movl %3,%1 ; "
|
|
" popfl"
|
|
: "=&A" (res), /* 0 */
|
|
"+m" (*q), /* 1 */
|
|
"+m" (*(q + 1)) /* 2 */
|
|
: "r" ((uint32_t)v), /* 3 */
|
|
"r" ((uint32_t)(v >> 32))); /* 4 */
|
|
return (res);
|
|
}
|
|
|
|
static __inline int
|
|
atomic_cmpset_64_i586(volatile uint64_t *dst, uint64_t expect, uint64_t src)
|
|
{
|
|
u_char res;
|
|
|
|
__asm __volatile(
|
|
" " MPLOCKED " "
|
|
" cmpxchg8b %1 ; "
|
|
" sete %0"
|
|
: "=q" (res), /* 0 */
|
|
"+m" (*dst), /* 1 */
|
|
"+A" (expect) /* 2 */
|
|
: "b" ((uint32_t)src), /* 3 */
|
|
"c" ((uint32_t)(src >> 32)) /* 4 */
|
|
: "memory", "cc");
|
|
return (res);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_acq_64_i586(volatile uint64_t *p)
|
|
{
|
|
uint64_t res;
|
|
|
|
__asm __volatile(
|
|
" movl %%ebx,%%eax ; "
|
|
" movl %%ecx,%%edx ; "
|
|
" " MPLOCKED " "
|
|
" cmpxchg8b %1"
|
|
: "=&A" (res), /* 0 */
|
|
"+m" (*p) /* 1 */
|
|
: : "memory", "cc");
|
|
return (res);
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_64_i586(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
|
|
__asm __volatile(
|
|
" movl %%eax,%%ebx ; "
|
|
" movl %%edx,%%ecx ; "
|
|
"1: "
|
|
" " MPLOCKED " "
|
|
" cmpxchg8b %0 ; "
|
|
" jne 1b"
|
|
: "+m" (*p), /* 0 */
|
|
"+A" (v) /* 1 */
|
|
: : "ebx", "ecx", "memory", "cc");
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_swap_64_i586(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
|
|
__asm __volatile(
|
|
" movl %%eax,%%ebx ; "
|
|
" movl %%edx,%%ecx ; "
|
|
"1: "
|
|
" " MPLOCKED " "
|
|
" cmpxchg8b %0 ; "
|
|
" jne 1b"
|
|
: "+m" (*p), /* 0 */
|
|
"+A" (v) /* 1 */
|
|
: : "ebx", "ecx", "memory", "cc");
|
|
return (v);
|
|
}
|
|
|
|
static __inline int
|
|
atomic_cmpset_64(volatile uint64_t *dst, uint64_t expect, uint64_t src)
|
|
{
|
|
|
|
if ((cpu_feature & CPUID_CX8) == 0)
|
|
return (atomic_cmpset_64_i386(dst, expect, src));
|
|
else
|
|
return (atomic_cmpset_64_i586(dst, expect, src));
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_load_acq_64(volatile uint64_t *p)
|
|
{
|
|
|
|
if ((cpu_feature & CPUID_CX8) == 0)
|
|
return (atomic_load_acq_64_i386(p));
|
|
else
|
|
return (atomic_load_acq_64_i586(p));
|
|
}
|
|
|
|
static __inline void
|
|
atomic_store_rel_64(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
|
|
if ((cpu_feature & CPUID_CX8) == 0)
|
|
atomic_store_rel_64_i386(p, v);
|
|
else
|
|
atomic_store_rel_64_i586(p, v);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
atomic_swap_64(volatile uint64_t *p, uint64_t v)
|
|
{
|
|
|
|
if ((cpu_feature & CPUID_CX8) == 0)
|
|
return (atomic_swap_64_i386(p, v));
|
|
else
|
|
return (atomic_swap_64_i586(p, v));
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* KLD_MODULE || !__GNUCLIKE_ASM */
|
|
|
|
ATOMIC_ASM(set, char, "orb %b1,%0", "iq", v);
|
|
ATOMIC_ASM(clear, char, "andb %b1,%0", "iq", ~v);
|
|
ATOMIC_ASM(add, char, "addb %b1,%0", "iq", v);
|
|
ATOMIC_ASM(subtract, char, "subb %b1,%0", "iq", v);
|
|
|
|
ATOMIC_ASM(set, short, "orw %w1,%0", "ir", v);
|
|
ATOMIC_ASM(clear, short, "andw %w1,%0", "ir", ~v);
|
|
ATOMIC_ASM(add, short, "addw %w1,%0", "ir", v);
|
|
ATOMIC_ASM(subtract, short, "subw %w1,%0", "ir", v);
|
|
|
|
ATOMIC_ASM(set, int, "orl %1,%0", "ir", v);
|
|
ATOMIC_ASM(clear, int, "andl %1,%0", "ir", ~v);
|
|
ATOMIC_ASM(add, int, "addl %1,%0", "ir", v);
|
|
ATOMIC_ASM(subtract, int, "subl %1,%0", "ir", v);
|
|
|
|
ATOMIC_ASM(set, long, "orl %1,%0", "ir", v);
|
|
ATOMIC_ASM(clear, long, "andl %1,%0", "ir", ~v);
|
|
ATOMIC_ASM(add, long, "addl %1,%0", "ir", v);
|
|
ATOMIC_ASM(subtract, long, "subl %1,%0", "ir", v);
|
|
|
|
ATOMIC_LOAD(char, "cmpxchgb %b0,%1");
|
|
ATOMIC_LOAD(short, "cmpxchgw %w0,%1");
|
|
ATOMIC_LOAD(int, "cmpxchgl %0,%1");
|
|
ATOMIC_LOAD(long, "cmpxchgl %0,%1");
|
|
|
|
ATOMIC_STORE(char);
|
|
ATOMIC_STORE(short);
|
|
ATOMIC_STORE(int);
|
|
ATOMIC_STORE(long);
|
|
|
|
#undef ATOMIC_ASM
|
|
#undef ATOMIC_LOAD
|
|
#undef ATOMIC_STORE
|
|
|
|
#ifndef WANT_FUNCTIONS
|
|
|
|
static __inline int
|
|
atomic_cmpset_long(volatile u_long *dst, u_long expect, u_long src)
|
|
{
|
|
|
|
return (atomic_cmpset_int((volatile u_int *)dst, (u_int)expect,
|
|
(u_int)src));
|
|
}
|
|
|
|
static __inline u_long
|
|
atomic_fetchadd_long(volatile u_long *p, u_long v)
|
|
{
|
|
|
|
return (atomic_fetchadd_int((volatile u_int *)p, (u_int)v));
|
|
}
|
|
|
|
static __inline int
|
|
atomic_testandset_long(volatile u_long *p, u_int v)
|
|
{
|
|
|
|
return (atomic_testandset_int((volatile u_int *)p, v));
|
|
}
|
|
|
|
/* Read the current value and store a new value in the destination. */
|
|
#ifdef __GNUCLIKE_ASM
|
|
|
|
static __inline u_int
|
|
atomic_swap_int(volatile u_int *p, u_int v)
|
|
{
|
|
|
|
__asm __volatile(
|
|
" xchgl %1,%0 ; "
|
|
"# atomic_swap_int"
|
|
: "+r" (v), /* 0 */
|
|
"+m" (*p)); /* 1 */
|
|
return (v);
|
|
}
|
|
|
|
static __inline u_long
|
|
atomic_swap_long(volatile u_long *p, u_long v)
|
|
{
|
|
|
|
return (atomic_swap_int((volatile u_int *)p, (u_int)v));
|
|
}
|
|
|
|
#else /* !__GNUCLIKE_ASM */
|
|
|
|
u_int atomic_swap_int(volatile u_int *p, u_int v);
|
|
u_long atomic_swap_long(volatile u_long *p, u_long v);
|
|
|
|
#endif /* __GNUCLIKE_ASM */
|
|
|
|
#define atomic_set_acq_char atomic_set_barr_char
|
|
#define atomic_set_rel_char atomic_set_barr_char
|
|
#define atomic_clear_acq_char atomic_clear_barr_char
|
|
#define atomic_clear_rel_char atomic_clear_barr_char
|
|
#define atomic_add_acq_char atomic_add_barr_char
|
|
#define atomic_add_rel_char atomic_add_barr_char
|
|
#define atomic_subtract_acq_char atomic_subtract_barr_char
|
|
#define atomic_subtract_rel_char atomic_subtract_barr_char
|
|
|
|
#define atomic_set_acq_short atomic_set_barr_short
|
|
#define atomic_set_rel_short atomic_set_barr_short
|
|
#define atomic_clear_acq_short atomic_clear_barr_short
|
|
#define atomic_clear_rel_short atomic_clear_barr_short
|
|
#define atomic_add_acq_short atomic_add_barr_short
|
|
#define atomic_add_rel_short atomic_add_barr_short
|
|
#define atomic_subtract_acq_short atomic_subtract_barr_short
|
|
#define atomic_subtract_rel_short atomic_subtract_barr_short
|
|
|
|
#define atomic_set_acq_int atomic_set_barr_int
|
|
#define atomic_set_rel_int atomic_set_barr_int
|
|
#define atomic_clear_acq_int atomic_clear_barr_int
|
|
#define atomic_clear_rel_int atomic_clear_barr_int
|
|
#define atomic_add_acq_int atomic_add_barr_int
|
|
#define atomic_add_rel_int atomic_add_barr_int
|
|
#define atomic_subtract_acq_int atomic_subtract_barr_int
|
|
#define atomic_subtract_rel_int atomic_subtract_barr_int
|
|
#define atomic_cmpset_acq_int atomic_cmpset_int
|
|
#define atomic_cmpset_rel_int atomic_cmpset_int
|
|
|
|
#define atomic_set_acq_long atomic_set_barr_long
|
|
#define atomic_set_rel_long atomic_set_barr_long
|
|
#define atomic_clear_acq_long atomic_clear_barr_long
|
|
#define atomic_clear_rel_long atomic_clear_barr_long
|
|
#define atomic_add_acq_long atomic_add_barr_long
|
|
#define atomic_add_rel_long atomic_add_barr_long
|
|
#define atomic_subtract_acq_long atomic_subtract_barr_long
|
|
#define atomic_subtract_rel_long atomic_subtract_barr_long
|
|
#define atomic_cmpset_acq_long atomic_cmpset_long
|
|
#define atomic_cmpset_rel_long atomic_cmpset_long
|
|
|
|
#define atomic_readandclear_int(p) atomic_swap_int(p, 0)
|
|
#define atomic_readandclear_long(p) atomic_swap_long(p, 0)
|
|
|
|
/* Operations on 8-bit bytes. */
|
|
#define atomic_set_8 atomic_set_char
|
|
#define atomic_set_acq_8 atomic_set_acq_char
|
|
#define atomic_set_rel_8 atomic_set_rel_char
|
|
#define atomic_clear_8 atomic_clear_char
|
|
#define atomic_clear_acq_8 atomic_clear_acq_char
|
|
#define atomic_clear_rel_8 atomic_clear_rel_char
|
|
#define atomic_add_8 atomic_add_char
|
|
#define atomic_add_acq_8 atomic_add_acq_char
|
|
#define atomic_add_rel_8 atomic_add_rel_char
|
|
#define atomic_subtract_8 atomic_subtract_char
|
|
#define atomic_subtract_acq_8 atomic_subtract_acq_char
|
|
#define atomic_subtract_rel_8 atomic_subtract_rel_char
|
|
#define atomic_load_acq_8 atomic_load_acq_char
|
|
#define atomic_store_rel_8 atomic_store_rel_char
|
|
|
|
/* Operations on 16-bit words. */
|
|
#define atomic_set_16 atomic_set_short
|
|
#define atomic_set_acq_16 atomic_set_acq_short
|
|
#define atomic_set_rel_16 atomic_set_rel_short
|
|
#define atomic_clear_16 atomic_clear_short
|
|
#define atomic_clear_acq_16 atomic_clear_acq_short
|
|
#define atomic_clear_rel_16 atomic_clear_rel_short
|
|
#define atomic_add_16 atomic_add_short
|
|
#define atomic_add_acq_16 atomic_add_acq_short
|
|
#define atomic_add_rel_16 atomic_add_rel_short
|
|
#define atomic_subtract_16 atomic_subtract_short
|
|
#define atomic_subtract_acq_16 atomic_subtract_acq_short
|
|
#define atomic_subtract_rel_16 atomic_subtract_rel_short
|
|
#define atomic_load_acq_16 atomic_load_acq_short
|
|
#define atomic_store_rel_16 atomic_store_rel_short
|
|
|
|
/* Operations on 32-bit double words. */
|
|
#define atomic_set_32 atomic_set_int
|
|
#define atomic_set_acq_32 atomic_set_acq_int
|
|
#define atomic_set_rel_32 atomic_set_rel_int
|
|
#define atomic_clear_32 atomic_clear_int
|
|
#define atomic_clear_acq_32 atomic_clear_acq_int
|
|
#define atomic_clear_rel_32 atomic_clear_rel_int
|
|
#define atomic_add_32 atomic_add_int
|
|
#define atomic_add_acq_32 atomic_add_acq_int
|
|
#define atomic_add_rel_32 atomic_add_rel_int
|
|
#define atomic_subtract_32 atomic_subtract_int
|
|
#define atomic_subtract_acq_32 atomic_subtract_acq_int
|
|
#define atomic_subtract_rel_32 atomic_subtract_rel_int
|
|
#define atomic_load_acq_32 atomic_load_acq_int
|
|
#define atomic_store_rel_32 atomic_store_rel_int
|
|
#define atomic_cmpset_32 atomic_cmpset_int
|
|
#define atomic_cmpset_acq_32 atomic_cmpset_acq_int
|
|
#define atomic_cmpset_rel_32 atomic_cmpset_rel_int
|
|
#define atomic_swap_32 atomic_swap_int
|
|
#define atomic_readandclear_32 atomic_readandclear_int
|
|
#define atomic_fetchadd_32 atomic_fetchadd_int
|
|
#define atomic_testandset_32 atomic_testandset_int
|
|
|
|
/* Operations on pointers. */
|
|
#define atomic_set_ptr(p, v) \
|
|
atomic_set_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_set_acq_ptr(p, v) \
|
|
atomic_set_acq_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_set_rel_ptr(p, v) \
|
|
atomic_set_rel_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_clear_ptr(p, v) \
|
|
atomic_clear_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_clear_acq_ptr(p, v) \
|
|
atomic_clear_acq_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_clear_rel_ptr(p, v) \
|
|
atomic_clear_rel_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_add_ptr(p, v) \
|
|
atomic_add_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_add_acq_ptr(p, v) \
|
|
atomic_add_acq_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_add_rel_ptr(p, v) \
|
|
atomic_add_rel_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_subtract_ptr(p, v) \
|
|
atomic_subtract_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_subtract_acq_ptr(p, v) \
|
|
atomic_subtract_acq_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_subtract_rel_ptr(p, v) \
|
|
atomic_subtract_rel_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_load_acq_ptr(p) \
|
|
atomic_load_acq_int((volatile u_int *)(p))
|
|
#define atomic_store_rel_ptr(p, v) \
|
|
atomic_store_rel_int((volatile u_int *)(p), (v))
|
|
#define atomic_cmpset_ptr(dst, old, new) \
|
|
atomic_cmpset_int((volatile u_int *)(dst), (u_int)(old), (u_int)(new))
|
|
#define atomic_cmpset_acq_ptr(dst, old, new) \
|
|
atomic_cmpset_acq_int((volatile u_int *)(dst), (u_int)(old), \
|
|
(u_int)(new))
|
|
#define atomic_cmpset_rel_ptr(dst, old, new) \
|
|
atomic_cmpset_rel_int((volatile u_int *)(dst), (u_int)(old), \
|
|
(u_int)(new))
|
|
#define atomic_swap_ptr(p, v) \
|
|
atomic_swap_int((volatile u_int *)(p), (u_int)(v))
|
|
#define atomic_readandclear_ptr(p) \
|
|
atomic_readandclear_int((volatile u_int *)(p))
|
|
|
|
#endif /* !WANT_FUNCTIONS */
|
|
|
|
#endif /* !_MACHINE_ATOMIC_H_ */
|