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//===------------------------ cxa_new_delete.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.
//
//
// This file implements the new and delete operators.
//===----------------------------------------------------------------------===//
#include <new>
#include <cstdlib>
/*
[new.delete.single]
* Executes a loop: Within the loop, the function first attempts to allocate
the requested storage. Whether the attempt involves a call to the Standard C
library function malloc is unspecified.
* Returns a pointer to the allocated storage if the attempt is successful.
Otherwise, if the current new_handler (18.6.2.5) is a null pointer value,
throws bad_alloc.
* Otherwise, the function calls the current new_handler function (18.6.2.3).
If the called function returns, the loop repeats.
* The loop terminates when an attempt to allocate the requested storage is
successful or when a called new_handler function does not return.
*/
__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 = std::malloc(size)) == 0)
{
std::new_handler nh = std::get_new_handler();
if (nh)
nh();
else
throw std::bad_alloc();
}
return p;
}
/*
Note: The relationships among these operators is both carefully considered
and standard in C++11. Please do not change them without fully understanding
the consequences of doing so. Reference:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2158.html
*/
/*
[new.delete.single]
Calls operator new(size). If the call returns normally, returns the result of
that call. Otherwise, returns a null pointer.
*/
__attribute__((__weak__, __visibility__("default")))
void*
operator new(size_t size, const std::nothrow_t&)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
void* p = 0;
try
{
p = ::operator new(size);
}
catch (...)
{
}
return p;
}
/*
[new.delete.array]
Returns operator new(size).
*/
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size)
#if !__has_feature(cxx_noexcept)
throw(std::bad_alloc)
#endif
{
return ::operator new(size);
}
/*
[new.delete.array]
Calls operator new[](size). If the call returns normally, returns the result
of that call. Otherwise, returns a null pointer.
*/
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size, const std::nothrow_t&)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
void* p = 0;
try
{
p = ::operator new[](size);
}
catch (...)
{
}
return p;
}
/*
[new.delete.single]
If ptr is null, does nothing. Otherwise, reclaims the storage allocated by the
earlier call to operator new.
*/
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
if (ptr)
std::free(ptr);
}
/*
[new.delete.single]
calls operator delete(ptr)
*/
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr, const std::nothrow_t&)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
::operator delete(ptr);
}
/*
[new.delete.array]
Calls operator delete(ptr)
*/
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
::operator delete(ptr);
}
/*
[new.delete.array]
calls operator delete[](ptr)
*/
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr, const std::nothrow_t&)
#if __has_feature(cxx_noexcept)
noexcept
#else
throw()
#endif
{
::operator delete[](ptr);
}
namespace std
{
// bad_alloc
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::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";
}
#ifdef __EMSCRIPTEN__
// We don't build the new.cpp from libcxx, so we need to define this.
void
__throw_bad_alloc()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#endif
}
#endif
} // std
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