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 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 #include <cstddef> 40 #include <exception> 41 42 #pragma GCC visibility push(default) 43 44 extern "C++" { 45 46 namespace std 47 { 48 /** 49 * @brief Exception possibly thrown by @c new. 50 * @ingroup exceptions 51 * 52 * @c bad_alloc (or classes derived from it) is used to report allocation 53 * errors from the throwing forms of @c new. */ 54 class bad_alloc : public exception 55 { 56 public: 57 bad_alloc() throw() { } 58 59 // This declaration is not useless: 60 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 61 virtual ~bad_alloc() throw(); 62 63 // See comment in eh_exception.cc. 64 virtual const char* what() const throw(); 65 }; 66 67 struct nothrow_t { }; 68 69 extern const nothrow_t nothrow; 70 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 75 /// Takes a replacement handler as the argument, returns the 76 /// previous handler. 77 new_handler set_new_handler(new_handler) throw(); 78 } // namespace std 79 80 //@{ 81 /** These are replaceable signatures: 82 * - normal single new and delete (no arguments, throw @c bad_alloc on error) 83 * - normal array new and delete (same) 84 * - @c nothrow single new and delete (take a @c nothrow argument, return 85 * @c NULL on error) 86 * - @c nothrow array new and delete (same) 87 * 88 * Placement new and delete signatures (take a memory address argument, 89 * does nothing) may not be replaced by a user's program. 90 */ 91 void* operator new(std::size_t) throw (std::bad_alloc); 92 void* operator new[](std::size_t) throw (std::bad_alloc); 93 void operator delete(void*) throw(); 94 void operator delete[](void*) throw(); 95 void* operator new(std::size_t, const std::nothrow_t&) throw(); 96 void* operator new[](std::size_t, const std::nothrow_t&) throw(); 97 void operator delete(void*, const std::nothrow_t&) throw(); 98 void operator delete[](void*, const std::nothrow_t&) throw(); 99 100 // Default placement versions of operator new. 101 inline void* operator new(std::size_t, void* __p) throw() { return __p; } 102 inline void* operator new[](std::size_t, void* __p) throw() { return __p; } 103 104 // Default placement versions of operator delete. 105 inline void operator delete (void*, void*) throw() { } 106 inline void operator delete[](void*, void*) throw() { } 107 //@} 108 } // extern "C++" 109 110 #pragma GCC visibility pop 111 112 #endif 113
