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|
//===--------------------------- new.cpp ----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <stdlib.h>
#include "new"
#if __APPLE__
#include <cxxabi.h>
// On Darwin, there are two STL shared libraries and a lower level ABI
// shared libray. The global holding the current new handler is
// in the ABI library and named __cxa_new_handler.
#define __new_handler __cxxabiapple::__cxa_new_handler
#else // __APPLE__
static std::new_handler __new_handler;
#endif
// Implement all new and delete operators as weak definitions
// in this shared library, so that they can be overriden by programs
// that define non-weak copies of the functions.
__attribute__((__weak__, __visibility__("default")))
void *
operator new(std::size_t size)
#if !__has_feature(cxx_noexcept)
throw(std::bad_alloc)
#endif
{
if (size == 0)
size = 1;
void* p;
while ((p = ::malloc(size)) == 0)
{
// If malloc fails and there is a new_handler,
// call it to try free up memory.
std::new_handler nh = std::get_new_handler();
if (nh)
nh();
else
#ifndef _LIBCPP_NO_EXCEPTIONS
throw std::bad_alloc();
#else
break;
#endif
}
return p;
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new(size_t size, const std::nothrow_t&) _NOEXCEPT
{
void* p = 0;
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
p = ::operator new(size);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_NO_EXCEPTIONS
return p;
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size)
#if !__has_feature(cxx_noexcept)
throw(std::bad_alloc)
#endif
{
return ::operator new(size);
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size, const std::nothrow_t& nothrow) _NOEXCEPT
{
void* p = 0;
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
p = ::operator new[](size);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_NO_EXCEPTIONS
return p;
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr) _NOEXCEPT
{
if (ptr)
::free(ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT
{
::operator delete(ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr) _NOEXCEPT
{
::operator delete (ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr, const std::nothrow_t&) _NOEXCEPT
{
::operator delete[](ptr);
}
namespace std
{
const nothrow_t nothrow = {};
new_handler
set_new_handler(new_handler handler) _NOEXCEPT
{
return __sync_lock_test_and_set(&__new_handler, handler);
}
new_handler
get_new_handler() _NOEXCEPT
{
return __sync_fetch_and_add(&__new_handler, (new_handler)0);
}
bad_alloc::bad_alloc() _NOEXCEPT
{
}
bad_alloc::~bad_alloc() _NOEXCEPT
{
}
const char*
bad_alloc::what() const _NOEXCEPT
{
return "std::bad_alloc";
}
bad_array_new_length::bad_array_new_length() _NOEXCEPT
{
}
bad_array_new_length::~bad_array_new_length() _NOEXCEPT
{
}
const char*
bad_array_new_length::what() const _NOEXCEPT
{
return "bad_array_new_length";
}
void
__throw_bad_alloc()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#endif
}
} // std
|
