gcc/libstdc++-v3/libsupc++/del_opa.cc

59 lines
1.9 KiB
C++

// Boilerplate support routines for -*- C++ -*- dynamic memory management.
// Copyright (C) 1997-2019 Free Software Foundation, Inc.
//
// This file is part of GCC.
//
// GCC is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// GCC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
#include <bits/c++config.h>
#if !_GLIBCXX_HOSTED
// A freestanding C runtime may not provide "free" -- but there is no
// other reasonable way to implement "operator delete".
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
extern "C" void free(void*);
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#else
# include <cstdlib>
#endif
#include "new"
// The sized deletes are defined in other files.
#pragma GCC diagnostic ignored "-Wsized-deallocation"
_GLIBCXX_WEAK_DEFINITION void
operator delete(void* ptr, std::align_val_t) noexcept
{
#if _GLIBCXX_HAVE_ALIGNED_ALLOC || _GLIBCXX_HAVE_POSIX_MEMALIGN \
|| _GLIBCXX_HAVE_MEMALIGN
std::free (ptr);
#elif _GLIBCXX_HAVE__ALIGNED_MALLOC
_aligned_free (ptr);
#else
if (ptr)
std::free (((void **) ptr)[-1]); // See aligned_alloc in new_opa.cc
#endif
}