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6305f20a | 1 | // The -*- C++ -*- dynamic memory management header. |
0c952af3 | 2 | |
405feeb8 | 3 | // Copyright (C) 1994-2013 Free Software Foundation, Inc. |
6305f20a | 4 | |
cbecceb9 | 5 | // This file is part of GCC. |
6305f20a | 6 | // |
cbecceb9 | 7 | // GCC is free software; you can redistribute it and/or modify |
6305f20a | 8 | // it under the terms of the GNU General Public License as published by |
748086b7 | 9 | // the Free Software Foundation; either version 3, or (at your option) |
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10 | // any later version. |
11 | // | |
cbecceb9 | 12 | // GCC is distributed in the hope that it will be useful, |
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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. | |
16 | // | |
748086b7 JJ |
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. | |
20 | ||
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/>. | |
6305f20a | 25 | |
669f7a03 | 26 | /** @file new |
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27 | * This is a Standard C++ Library header. |
28 | * | |
ffe94f83 | 29 | * The header @c new defines several functions to manage dynamic memory and |
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30 | * handling memory allocation errors; see |
31 | * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. | |
32 | */ | |
33 | ||
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34 | #ifndef _NEW |
35 | #define _NEW | |
6305f20a | 36 | |
584fd146 PC |
37 | #pragma GCC system_header |
38 | ||
8fc81078 | 39 | #include <bits/c++config.h> |
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40 | #include <exception> |
41 | ||
723acbd5 MM |
42 | #pragma GCC visibility push(default) |
43 | ||
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44 | extern "C++" { |
45 | ||
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46 | namespace std |
47 | { | |
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48 | /** |
49 | * @brief Exception possibly thrown by @c new. | |
5b9daa7e | 50 | * @ingroup exceptions |
aa2d5ba2 PE |
51 | * |
52 | * @c bad_alloc (or classes derived from it) is used to report allocation | |
669f7a03 | 53 | * errors from the throwing forms of @c new. */ |
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54 | class bad_alloc : public exception |
55 | { | |
6305f20a | 56 | public: |
f68147f7 | 57 | bad_alloc() throw() { } |
949d9ae1 | 58 | |
e05cd3dd PC |
59 | // This declaration is not useless: |
60 | // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 | |
d66ae36a | 61 | virtual ~bad_alloc() throw(); |
949d9ae1 | 62 | |
c3f0f556 PC |
63 | // See comment in eh_exception.cc. |
64 | virtual const char* what() const throw(); | |
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65 | }; |
66 | ||
7d5e76c8 JM |
67 | #if __cplusplus >= 201103L |
68 | class bad_array_new_length : public bad_alloc | |
69 | { | |
70 | public: | |
71 | bad_array_new_length() throw() { }; | |
72 | ||
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(); | |
76 | ||
77 | // See comment in eh_exception.cc. | |
78 | virtual const char* what() const throw(); | |
79 | }; | |
80 | #endif | |
81 | ||
0c952af3 | 82 | struct nothrow_t { }; |
949d9ae1 | 83 | |
6305f20a | 84 | extern const nothrow_t nothrow; |
949d9ae1 | 85 | |
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86 | /** If you write your own error handler to be called by @c new, it must |
87 | * be of this type. */ | |
6305f20a | 88 | typedef void (*new_handler)(); |
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89 | |
90 | /// Takes a replacement handler as the argument, returns the | |
91 | /// previous handler. | |
984812cd | 92 | new_handler set_new_handler(new_handler) throw(); |
dca77a8a JW |
93 | |
94 | #if __cplusplus >= 201103L | |
95 | /// Return the current new handler. | |
96 | new_handler get_new_handler() noexcept; | |
97 | #endif | |
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98 | } // namespace std |
99 | ||
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100 | //@{ |
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 | |
105 | * @c NULL on error) | |
106 | * - @c nothrow array new and delete (same) | |
107 | * | |
108 | * Placement new and delete signatures (take a memory address argument, | |
109 | * does nothing) may not be replaced by a user's program. | |
110 | */ | |
578f0234 PC |
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__)); | |
6305f20a | 127 | |
0c952af3 | 128 | // Default placement versions of operator new. |
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129 | inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT |
130 | { return __p; } | |
131 | inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT | |
132 | { return __p; } | |
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133 | |
134 | // Default placement versions of operator delete. | |
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135 | inline void operator delete (void*, void*) _GLIBCXX_USE_NOEXCEPT { } |
136 | inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { } | |
669f7a03 | 137 | //@} |
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138 | } // extern "C++" |
139 | ||
723acbd5 MM |
140 | #pragma GCC visibility pop |
141 | ||
6305f20a | 142 | #endif |