1 // The -*- C++ -*- dynamic memory management header.
3 // Copyright (C) 1994-2014 Free Software Foundation, Inc.
5 // This file is part of GCC.
7 // GCC is free software; you can redistribute it and/or modify
8 // it under the terms of the GNU General Public License as published by
9 // the Free Software Foundation; either version 3, or (at your option)
12 // GCC is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
27 * This is a Standard C++ Library header.
29 * The header @c new defines several functions to manage dynamic memory and
30 * handling memory allocation errors; see
31 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
37 #pragma GCC system_header
39 #include <bits/c++config.h>
42 #pragma GCC visibility push(default)
49 * @brief Exception possibly thrown by @c new.
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
57 bad_alloc() throw() { }
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();
63 // See comment in eh_exception.cc.
64 virtual const char* what() const throw();
67 #if __cplusplus >= 201103L
68 class bad_array_new_length : public bad_alloc
71 bad_array_new_length() throw() { };
73 // This declaration is not useless:
74 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
75 virtual ~bad_array_new_length() throw();
77 // See comment in eh_exception.cc.
78 virtual const char* what() const throw();
84 extern const nothrow_t nothrow;
86 /** If you write your own error handler to be called by @c new, it must
88 typedef void (*new_handler)();
90 /// Takes a replacement handler as the argument, returns the
92 new_handler set_new_handler(new_handler) throw();
94 #if __cplusplus >= 201103L
95 /// Return the current new handler.
96 new_handler get_new_handler() noexcept;
101 /** These are replaceable signatures:
102 * - normal single new and delete (no arguments, throw @c bad_alloc on error)
103 * - normal array new and delete (same)
104 * - @c nothrow single new and delete (take a @c nothrow argument, return
106 * - @c nothrow array new and delete (same)
108 * Placement new and delete signatures (take a memory address argument,
109 * does nothing) may not be replaced by a user's program.
111 void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
112 __attribute__((__externally_visible__));
113 void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
114 __attribute__((__externally_visible__));
115 void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
116 __attribute__((__externally_visible__));
117 void operator delete[](void*) _GLIBCXX_USE_NOEXCEPT
118 __attribute__((__externally_visible__));
119 void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
120 __attribute__((__externally_visible__));
121 void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
122 __attribute__((__externally_visible__));
123 void operator delete(void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
124 __attribute__((__externally_visible__));
125 void operator delete[](void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
126 __attribute__((__externally_visible__));
128 // Default placement versions of operator new.
129 inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
131 inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
134 // Default placement versions of operator delete.
135 inline void operator delete (void*, void*) _GLIBCXX_USE_NOEXCEPT { }
136 inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { }
140 #pragma GCC visibility pop