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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <__memory/aligned_alloc.h>
#include <cstdlib>
#include <new>
#if !defined(__GLIBCXX__) && !defined(_LIBCPP_ABI_VCRUNTIME)
// The code below is copied as-is into libc++abi's libcxxabi/src/stdlib_new_delete.cpp
// file. The version in this file is the canonical one.
// ------------------ BEGIN COPY ------------------
// Implement all new and delete operators as weak definitions
// in this shared library, so that they can be overridden by programs
// that define non-weak copies of the functions.
static void* operator_new_impl(std::size_t size) noexcept {
if (size == 0)
size = 1;
void* p;
while ((p = std::malloc(size)) == nullptr) {
// 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
break;
}
return p;
}
_LIBCPP_WEAK void* operator new(std::size_t size) _THROW_BAD_ALLOC {
void* p = operator_new_impl(size);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
if (p == nullptr)
throw std::bad_alloc();
# else
# ifdef __EMSCRIPTEN__
if (p == nullptr)
// Abort here so that when exceptions are disabled, we do not just
// return 0 when malloc returns 0.
// We could also do this with set_new_handler, but that adds a
// global constructor and a table entry, overhead that we can avoid
// by doing it this way.
abort();
# endif
# endif
return p;
}
_LIBCPP_WEAK void* operator new(size_t size, const std::nothrow_t&) noexcept {
void* p = nullptr;
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
p = ::operator new(size);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
return p;
}
_LIBCPP_WEAK void* operator new[](size_t size) _THROW_BAD_ALLOC { return ::operator new(size); }
_LIBCPP_WEAK void* operator new[](size_t size, const std::nothrow_t&) noexcept {
void* p = nullptr;
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
p = ::operator new[](size);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
return p;
}
_LIBCPP_WEAK void operator delete(void* ptr) noexcept { std::free(ptr); }
_LIBCPP_WEAK void operator delete(void* ptr, const std::nothrow_t&) noexcept { ::operator delete(ptr); }
_LIBCPP_WEAK void operator delete(void* ptr, size_t) noexcept { ::operator delete(ptr); }
_LIBCPP_WEAK void operator delete[](void* ptr) noexcept { ::operator delete(ptr); }
_LIBCPP_WEAK void operator delete[](void* ptr, const std::nothrow_t&) noexcept { ::operator delete[](ptr); }
_LIBCPP_WEAK void operator delete[](void* ptr, size_t) noexcept { ::operator delete[](ptr); }
# if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
static void* operator_new_aligned_impl(std::size_t size, std::align_val_t alignment) noexcept {
if (size == 0)
size = 1;
if (static_cast<size_t>(alignment) < sizeof(void*))
alignment = std::align_val_t(sizeof(void*));
// Try allocating memory. If allocation fails and there is a new_handler,
// call it to try free up memory, and try again until it succeeds, or until
// the new_handler decides to terminate.
void* p;
while ((p = std::__libcpp_aligned_alloc(static_cast<std::size_t>(alignment), size)) == nullptr) {
std::new_handler nh = std::get_new_handler();
if (nh)
nh();
else
break;
}
return p;
}
_LIBCPP_WEAK void* operator new(std::size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC {
void* p = operator_new_aligned_impl(size, alignment);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
if (p == nullptr)
throw std::bad_alloc();
# endif
return p;
}
_LIBCPP_WEAK void* operator new(size_t size, std::align_val_t alignment, const std::nothrow_t&) noexcept {
void* p = nullptr;
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
p = ::operator new(size, alignment);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
return p;
}
_LIBCPP_WEAK void* operator new[](size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC {
return ::operator new(size, alignment);
}
_LIBCPP_WEAK void* operator new[](size_t size, std::align_val_t alignment, const std::nothrow_t&) noexcept {
void* p = nullptr;
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
p = ::operator new[](size, alignment);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
return p;
}
_LIBCPP_WEAK void operator delete(void* ptr, std::align_val_t) noexcept { std::__libcpp_aligned_free(ptr); }
_LIBCPP_WEAK void operator delete(void* ptr, std::align_val_t alignment, const std::nothrow_t&) noexcept {
::operator delete(ptr, alignment);
}
_LIBCPP_WEAK void operator delete(void* ptr, size_t, std::align_val_t alignment) noexcept {
::operator delete(ptr, alignment);
}
_LIBCPP_WEAK void operator delete[](void* ptr, std::align_val_t alignment) noexcept {
::operator delete(ptr, alignment);
}
_LIBCPP_WEAK void operator delete[](void* ptr, std::align_val_t alignment, const std::nothrow_t&) noexcept {
::operator delete[](ptr, alignment);
}
_LIBCPP_WEAK void operator delete[](void* ptr, size_t, std::align_val_t alignment) noexcept {
::operator delete[](ptr, alignment);
}
# endif // !_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
// ------------------ END COPY ------------------
#endif // !__GLIBCXX__ && !_LIBCPP_ABI_VCRUNTIME
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