new revision 169691
1// The -*- C++ -*- dynamic memory management header. 2 3// Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 4// 2003, 2004, 2005, 2006, 2007 5// Free Software Foundation 6 7// This file is part of GCC. 8// 9// GCC is free software; you can redistribute it and/or modify 10// it under the terms of the GNU General Public License as published by 11// the Free Software Foundation; either version 2, or (at your option) 12// any later version. 13// 14// GCC is distributed in the hope that it will be useful, 15// but WITHOUT ANY WARRANTY; without even the implied warranty of 16// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17// GNU General Public License for more details. 18// 19// You should have received a copy of the GNU General Public License 20// along with GCC; see the file COPYING. If not, write to 21// the Free Software Foundation, 51 Franklin Street, Fifth Floor, 22// Boston, MA 02110-1301, USA. 23 24// As a special exception, you may use this file as part of a free software 25// library without restriction. Specifically, if other files instantiate 26// templates or use macros or inline functions from this file, or you compile 27// this file and link it with other files to produce an executable, this 28// file does not by itself cause the resulting executable to be covered by 29// the GNU General Public License. This exception does not however 30// invalidate any other reasons why the executable file might be covered by 31// the GNU General Public License. 32 33/** @file new 34 * This is a Standard C++ Library header. 35 * 36 * The header @c new defines several functions to manage dynamic memory and 37 * handling memory allocation errors; see 38 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. 39 */ 40 41#ifndef _NEW 42#define _NEW 43 44#include <cstddef> 45#include <exception> 46 47#pragma GCC visibility push(default) 48 49extern "C++" { 50 51namespace std 52{ 53 /** 54 * @brief Exception possibly thrown by @c new. 55 * 56 * @c bad_alloc (or classes derived from it) is used to report allocation 57 * errors from the throwing forms of @c new. */ 58 class bad_alloc : public exception 59 { 60 public: 61 bad_alloc() throw() { } 62 // This declaration is not useless: 63 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 64 virtual ~bad_alloc() throw(); 65 // See comment in eh_exception.cc. 66 virtual const char* what() const throw(); 67 }; 68 69 struct nothrow_t { }; 70 extern const nothrow_t nothrow; 71 /** If you write your own error handler to be called by @c new, it must 72 * be of this type. */ 73 typedef void (*new_handler)(); 74 /// Takes a replacement handler as the argument, returns the previous handler. 75 new_handler set_new_handler(new_handler) throw(); 76} // namespace std 77 78//@{ 79/** These are replaceable signatures: 80 * - normal single new and delete (no arguments, throw @c bad_alloc on error) 81 * - normal array new and delete (same) 82 * - @c nothrow single new and delete (take a @c nothrow argument, return 83 * @c NULL on error) 84 * - @c nothrow array new and delete (same) 85 * 86 * Placement new and delete signatures (take a memory address argument, 87 * does nothing) may not be replaced by a user's program. 88*/ 89void* operator new(std::size_t) throw (std::bad_alloc); 90void* operator new[](std::size_t) throw (std::bad_alloc); 91void operator delete(void*) throw(); 92void operator delete[](void*) throw(); 93void* operator new(std::size_t, const std::nothrow_t&) throw(); 94void* operator new[](std::size_t, const std::nothrow_t&) throw(); 95void operator delete(void*, const std::nothrow_t&) throw(); 96void operator delete[](void*, const std::nothrow_t&) throw(); 97 98// Default placement versions of operator new. 99inline void* operator new(std::size_t, void* __p) throw() { return __p; } 100inline void* operator new[](std::size_t, void* __p) throw() { return __p; } 101 102// Default placement versions of operator delete. 103inline void operator delete (void*, void*) throw() { } 104inline void operator delete[](void*, void*) throw() { } 105//@} 106} // extern "C++" 107 108#pragma GCC visibility pop 109 110#endif 111