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, 2009, 2010 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 3, 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// Under Section 7 of GPL version 3, you are granted additional 20// permissions described in the GCC Runtime Library Exception, version 21// 3.1, as published by the Free Software Foundation. 22 23// You should have received a copy of the GNU General Public License and 24// a copy of the GCC Runtime Library Exception along with this program; 25// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 26// <http://www.gnu.org/licenses/>. 27 28/** @file new 29 * This is a Standard C++ Library header. 30 * 31 * The header @c new defines several functions to manage dynamic memory and 32 * handling memory allocation errors; see 33 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. 34 */ 35 36#ifndef _NEW 37#define _NEW 38 39#pragma GCC system_header 40 41#include <cstddef> 42#include <exception> 43 44#pragma GCC visibility push(default) 45 46extern "C++" { 47 48namespace std 49{ 50 /** 51 * @brief Exception possibly thrown by @c new. 52 * @ingroup exceptions 53 * 54 * @c bad_alloc (or classes derived from it) is used to report allocation 55 * errors from the throwing forms of @c new. */ 56 class bad_alloc : public exception 57 { 58 public: 59 bad_alloc() throw() { } 60 61 // This declaration is not useless: 62 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 63 virtual ~bad_alloc() throw(); 64 65 // See comment in eh_exception.cc. 66 virtual const char* what() const throw(); 67 }; 68 69 struct nothrow_t { }; 70 71 extern const nothrow_t nothrow; 72 73 /** If you write your own error handler to be called by @c new, it must 74 * be of this type. */ 75 typedef void (*new_handler)(); 76 77 /// Takes a replacement handler as the argument, returns the 78 /// previous handler. 79 new_handler set_new_handler(new_handler) throw(); 80} // namespace std 81 82//@{ 83/** These are replaceable signatures: 84 * - normal single new and delete (no arguments, throw @c bad_alloc on error) 85 * - normal array new and delete (same) 86 * - @c nothrow single new and delete (take a @c nothrow argument, return 87 * @c NULL on error) 88 * - @c nothrow array new and delete (same) 89 * 90 * Placement new and delete signatures (take a memory address argument, 91 * does nothing) may not be replaced by a user's program. 92*/ 93void* operator new(std::size_t) throw (std::bad_alloc); 94void* operator new[](std::size_t) throw (std::bad_alloc); 95void operator delete(void*) throw(); 96void operator delete[](void*) throw(); 97void* operator new(std::size_t, const std::nothrow_t&) throw(); 98void* operator new[](std::size_t, const std::nothrow_t&) throw(); 99void operator delete(void*, const std::nothrow_t&) throw(); 100void operator delete[](void*, const std::nothrow_t&) throw(); 101 102// Default placement versions of operator new. 103inline void* operator new(std::size_t, void* __p) throw() { return __p; } 104inline void* operator new[](std::size_t, void* __p) throw() { return __p; } 105 106// Default placement versions of operator delete. 107inline void operator delete (void*, void*) throw() { } 108inline void operator delete[](void*, void*) throw() { } 109//@} 110} // extern "C++" 111 112#pragma GCC visibility pop 113 114#endif 115