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/**
* memory.cc - Contains stub definition of C++ new/delete operators.
*
* These definitions are intended to be used for testing and are weak symbols
* to allow them to be replaced by definitions from a STL implementation.
* These versions simply wrap malloc() and free(), they do not provide a
* C++-specific allocator.
*/
#include <stddef.h>
#include <stdlib.h>
#include "stdexcept.h"
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#if !__has_builtin(__sync_swap)
#define __sync_swap __sync_lock_test_and_set
#endif
namespace std
{
struct nothrow_t {};
}
/// The type of the function called when allocation fails.
typedef void (*new_handler)();
/**
* The function to call when allocation fails. By default, there is no
* handler and a bad allocation exception is thrown if an allocation fails.
*/
static new_handler new_handl;
namespace std
{
/**
* Sets a function to be called when there is a failure in new.
*/
__attribute__((weak))
new_handler set_new_handler(new_handler handler)
{
return __sync_swap(&new_handl, handler);
}
}
__attribute__((weak))
void* operator new(size_t size)
{
void * mem = malloc(size);
while (0 == mem)
{
if (0 != new_handl)
{
new_handl();
}
else
{
throw std::bad_alloc();
}
mem = malloc(size);
}
return mem;
}
__attribute__((weak))
void* operator new(size_t size, const std::nothrow_t &) throw()
{
void *mem = malloc(size);
while (0 == mem)
{
if (0 != new_handl)
{
try
{
new_handl();
}
catch (...)
{
// nothrow operator new should return NULL in case of
// std::bad_alloc exception in new handler
return NULL;
}
}
else
{
return NULL;
}
mem = malloc(size);
}
return mem;
}
__attribute__((weak))
void operator delete(void * ptr)
{
free(ptr);
}
__attribute__((weak))
void * operator new[](size_t size)
{
return ::operator new(size);
}
__attribute__((weak))
void operator delete[](void * ptr) throw()
{
::operator delete(ptr);
}
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