00001 // The -*- C++ -*- dynamic memory management header. 00002 00003 // Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 00004 // 2003, 2004, 2005, 2006, 2007, 2009 00005 // Free Software Foundation 00006 00007 // This file is part of GCC. 00008 // 00009 // GCC is free software; you can redistribute it and/or modify 00010 // it under the terms of the GNU General Public License as published by 00011 // the Free Software Foundation; either version 3, or (at your option) 00012 // any later version. 00013 // 00014 // GCC is distributed in the hope that it will be useful, 00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 // GNU General Public License for more details. 00018 // 00019 // Under Section 7 of GPL version 3, you are granted additional 00020 // permissions described in the GCC Runtime Library Exception, version 00021 // 3.1, as published by the Free Software Foundation. 00022 00023 // You should have received a copy of the GNU General Public License and 00024 // a copy of the GCC Runtime Library Exception along with this program; 00025 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00026 // <http://www.gnu.org/licenses/>. 00027 00028 /** @file new 00029 * This is a Standard C++ Library header. 00030 * 00031 * The header @c new defines several functions to manage dynamic memory and 00032 * handling memory allocation errors; see 00033 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. 00034 */ 00035 00036 #ifndef _NEW 00037 #define _NEW 00038 00039 #include <cstddef> 00040 #include <exception> 00041 00042 #pragma GCC visibility push(default) 00043 00044 extern "C++" { 00045 00046 namespace std 00047 { 00048 /** 00049 * @brief Exception possibly thrown by @c new. 00050 * @ingroup exceptions 00051 * 00052 * @c bad_alloc (or classes derived from it) is used to report allocation 00053 * errors from the throwing forms of @c new. */ 00054 class bad_alloc : public exception 00055 { 00056 public: 00057 bad_alloc() throw() { } 00058 00059 // This declaration is not useless: 00060 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 00061 virtual ~bad_alloc() throw(); 00062 00063 // See comment in eh_exception.cc. 00064 virtual const char* what() const throw(); 00065 }; 00066 00067 struct nothrow_t { }; 00068 00069 extern const nothrow_t nothrow; 00070 00071 /** If you write your own error handler to be called by @c new, it must 00072 * be of this type. */ 00073 typedef void (*new_handler)(); 00074 00075 /// Takes a replacement handler as the argument, returns the 00076 /// previous handler. 00077 new_handler set_new_handler(new_handler) throw(); 00078 } // namespace std 00079 00080 //@{ 00081 /** These are replaceable signatures: 00082 * - normal single new and delete (no arguments, throw @c bad_alloc on error) 00083 * - normal array new and delete (same) 00084 * - @c nothrow single new and delete (take a @c nothrow argument, return 00085 * @c NULL on error) 00086 * - @c nothrow array new and delete (same) 00087 * 00088 * Placement new and delete signatures (take a memory address argument, 00089 * does nothing) may not be replaced by a user's program. 00090 */ 00091 void* operator new(std::size_t) throw (std::bad_alloc); 00092 void* operator new[](std::size_t) throw (std::bad_alloc); 00093 void operator delete(void*) throw(); 00094 void operator delete[](void*) throw(); 00095 void* operator new(std::size_t, const std::nothrow_t&) throw(); 00096 void* operator new[](std::size_t, const std::nothrow_t&) throw(); 00097 void operator delete(void*, const std::nothrow_t&) throw(); 00098 void operator delete[](void*, const std::nothrow_t&) throw(); 00099 00100 // Default placement versions of operator new. 00101 inline void* operator new(std::size_t, void* __p) throw() { return __p; } 00102 inline void* operator new[](std::size_t, void* __p) throw() { return __p; } 00103 00104 // Default placement versions of operator delete. 00105 inline void operator delete (void*, void*) throw() { } 00106 inline void operator delete[](void*, void*) throw() { } 00107 //@} 00108 } // extern "C++" 00109 00110 #pragma GCC visibility pop 00111 00112 #endif