new revision 117397
1// The -*- C++ -*- dynamic memory management header. 2 3// Copyright (C) 1994, 1996, 1997, 1998, 2000, 2001, 2002 4// Free Software Foundation 5 6// This file is part of GNU CC. 7// 8// GNU CC is free software; you can redistribute it and/or modify 9// it under the terms of the GNU General Public License as published by 10// the Free Software Foundation; either version 2, or (at your option) 11// any later version. 12// 13// GNU CC is distributed in the hope that it will be useful, 14// but WITHOUT ANY WARRANTY; without even the implied warranty of 15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16// GNU General Public License for more details. 17// 18// You should have received a copy of the GNU General Public License 19// along with GNU CC; see the file COPYING. If not, write to 20// the Free Software Foundation, 59 Temple Place - Suite 330, 21// Boston, MA 02111-1307, USA. 22 23// As a special exception, you may use this file as part of a free software 24// library without restriction. Specifically, if other files instantiate 25// templates or use macros or inline functions from this file, or you compile 26// this file and link it with other files to produce an executable, this 27// file does not by itself cause the resulting executable to be covered by 28// the GNU General Public License. This exception does not however 29// invalidate any other reasons why the executable file might be covered by 30// the GNU General Public License. 31 32/** @file new 33 * The header @c new defines several functions to manage dynamic memory and 34 * handling memory allocation errors; see 35 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. 36 */ 37 38#ifndef __NEW__ 39#define __NEW__ 40 41#include <cstddef> 42#include <exception> 43 44extern "C++" { 45 46namespace std 47{ 48 /** 49 * @brief Exception possibly thrown by @c new. 50 * 51 * @c bad_alloc (or classes derived from it) is used to report allocation 52 * errors from the throwing forms of @c new. */ 53 class bad_alloc : public exception 54 { 55 public: 56 bad_alloc() throw() { } 57 // This declaration is not useless: 58 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 59 virtual ~bad_alloc() throw(); 60 }; 61 62 struct nothrow_t { }; 63 extern const nothrow_t nothrow; 64 /** If you write your own error handler to be called by @c new, it must 65 * be of this type. */ 66 typedef void (*new_handler)(); 67 /// Takes a replacement handler as the argument, returns the previous handler. 68 new_handler set_new_handler(new_handler) throw(); 69} // namespace std 70 71//@{ 72/** These are replaceable signatures: 73 * - normal single new and delete (no arguments, throw @c bad_alloc on error) 74 * - normal array new and delete (same) 75 * - @c nothrow single new and delete (take a @c nothrow argument, return 76 * @c NULL on error) 77 * - @c nothrow array new and delete (same) 78 * 79 * Placement new and delete signatures (take a memory address argument, 80 * does nothing) may not be replaced by a user's program. 81*/ 82void* operator new(std::size_t) throw (std::bad_alloc); 83void* operator new[](std::size_t) throw (std::bad_alloc); 84void operator delete(void*) throw(); 85void operator delete[](void*) throw(); 86void* operator new(std::size_t, const std::nothrow_t&) throw(); 87void* operator new[](std::size_t, const std::nothrow_t&) throw(); 88void operator delete(void*, const std::nothrow_t&) throw(); 89void operator delete[](void*, const std::nothrow_t&) throw(); 90 91// Default placement versions of operator new. 92inline void* operator new(std::size_t, void* __p) throw() { return __p; } 93inline void* operator new[](std::size_t, void* __p) throw() { return __p; } 94 95// Default placement versions of operator delete. 96inline void operator delete (void*, void*) throw() { }; 97inline void operator delete[](void*, void*) throw() { }; 98//@} 99} // extern "C++" 100 101#endif 102