7a98470824
MK_LIBCPLUSPLUS=yes to enable). This is a work-in-progress. It works for me, but is not guaranteed to work for anyone else and may eat your dog. To build C++ using libc++, add -stdlib=libc++ to your CXX and LD flags. Bug reports welcome, bug fixes even more welcome... Approved by: dim (mentor)
112 lines
1.8 KiB
C++
112 lines
1.8 KiB
C++
/**
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* memory.cc - Contains stub definition of C++ new/delete operators.
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*
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* These definitions are intended to be used for testing and are weak symbols
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* to allow them to be replaced by definitions from a STL implementation.
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* These versions simply wrap malloc() and free(), they do not provide a
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* C++-specific allocator.
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include "stdexcept.h"
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namespace std
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{
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struct nothrow_t {};
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}
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/// The type of the function called when allocation fails.
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typedef void (*new_handler)();
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/**
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* The function to call when allocation fails. By default, there is no
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* handler and a bad allocation exception is thrown if an allocation fails.
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*/
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static new_handler new_handl;
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namespace std
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{
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/**
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* Sets a function to be called when there is a failure in new.
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*/
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__attribute__((weak))
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new_handler set_new_handler(new_handler handler)
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{
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return __sync_lock_test_and_set(&new_handl, handler);
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}
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}
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__attribute__((weak))
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void* operator new(size_t size)
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{
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void * mem = malloc(size);
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while (0 == mem)
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{
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if (0 != new_handl)
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{
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new_handl();
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}
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else
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{
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throw std::bad_alloc();
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}
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mem = malloc(size);
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}
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return mem;
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}
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__attribute__((weak))
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void* operator new(size_t size, const std::nothrow_t &) throw()
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{
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void *mem = malloc(size);
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while (0 == mem)
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{
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if (0 != new_handl)
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{
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try
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{
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new_handl();
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}
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catch (...)
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{
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// nothrow operator new should return NULL in case of
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// std::bad_alloc exception in new handler
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return NULL;
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}
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}
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else
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{
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return NULL;
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}
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mem = malloc(size);
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}
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return mem;
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}
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__attribute__((weak))
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void operator delete(void * ptr)
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{
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free(ptr);
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}
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__attribute__((weak))
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void * operator new[](size_t size)
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{
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return ::operator new(size);
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}
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__attribute__((weak))
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void operator delete[](void * ptr)
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{
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::operator delete(ptr);
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}
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