mirror of git://gcc.gnu.org/git/gcc.git
143 lines
4.6 KiB
C++
143 lines
4.6 KiB
C++
// The -*- C++ -*- dynamic memory management header.
|
|
|
|
// Copyright (C) 1994-2015 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/>.
|
|
|
|
/** @file new
|
|
* This is a Standard C++ Library header.
|
|
*
|
|
* The header @c new defines several functions to manage dynamic memory and
|
|
* handling memory allocation errors; see
|
|
* http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
|
|
*/
|
|
|
|
#ifndef _NEW
|
|
#define _NEW
|
|
|
|
#pragma GCC system_header
|
|
|
|
#include <bits/c++config.h>
|
|
#include <exception>
|
|
|
|
#pragma GCC visibility push(default)
|
|
|
|
extern "C++" {
|
|
|
|
namespace std
|
|
{
|
|
/**
|
|
* @brief Exception possibly thrown by @c new.
|
|
* @ingroup exceptions
|
|
*
|
|
* @c bad_alloc (or classes derived from it) is used to report allocation
|
|
* errors from the throwing forms of @c new. */
|
|
class bad_alloc : public exception
|
|
{
|
|
public:
|
|
bad_alloc() throw() { }
|
|
|
|
// This declaration is not useless:
|
|
// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
|
|
virtual ~bad_alloc() throw();
|
|
|
|
// See comment in eh_exception.cc.
|
|
virtual const char* what() const throw();
|
|
};
|
|
|
|
#if __cplusplus >= 201103L
|
|
class bad_array_new_length : public bad_alloc
|
|
{
|
|
public:
|
|
bad_array_new_length() throw() { };
|
|
|
|
// This declaration is not useless:
|
|
// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
|
|
virtual ~bad_array_new_length() throw();
|
|
|
|
// See comment in eh_exception.cc.
|
|
virtual const char* what() const throw();
|
|
};
|
|
#endif
|
|
|
|
struct nothrow_t { };
|
|
|
|
extern const nothrow_t nothrow;
|
|
|
|
/** If you write your own error handler to be called by @c new, it must
|
|
* be of this type. */
|
|
typedef void (*new_handler)();
|
|
|
|
/// Takes a replacement handler as the argument, returns the
|
|
/// previous handler.
|
|
new_handler set_new_handler(new_handler) throw();
|
|
|
|
#if __cplusplus >= 201103L
|
|
/// Return the current new handler.
|
|
new_handler get_new_handler() noexcept;
|
|
#endif
|
|
} // namespace std
|
|
|
|
//@{
|
|
/** These are replaceable signatures:
|
|
* - normal single new and delete (no arguments, throw @c bad_alloc on error)
|
|
* - normal array new and delete (same)
|
|
* - @c nothrow single new and delete (take a @c nothrow argument, return
|
|
* @c NULL on error)
|
|
* - @c nothrow array new and delete (same)
|
|
*
|
|
* Placement new and delete signatures (take a memory address argument,
|
|
* does nothing) may not be replaced by a user's program.
|
|
*/
|
|
void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
|
|
__attribute__((__externally_visible__));
|
|
void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
|
|
__attribute__((__externally_visible__));
|
|
void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
void operator delete[](void*) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
void operator delete(void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
void operator delete[](void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
|
|
__attribute__((__externally_visible__));
|
|
|
|
// Default placement versions of operator new.
|
|
inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
|
|
{ return __p; }
|
|
inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
|
|
{ return __p; }
|
|
|
|
// Default placement versions of operator delete.
|
|
inline void operator delete (void*, void*) _GLIBCXX_USE_NOEXCEPT { }
|
|
inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { }
|
|
//@}
|
|
} // extern "C++"
|
|
|
|
#pragma GCC visibility pop
|
|
|
|
#endif
|