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6305f20a | 1 | // The -*- C++ -*- dynamic memory management header. |
0c952af3 | 2 | |
c3f0f556 | 3 | // Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
584fd146 | 4 | // 2003, 2004, 2005, 2006, 2007, 2009, 2010 |
d66ae36a | 5 | // Free Software Foundation |
6305f20a | 6 | |
cbecceb9 | 7 | // This file is part of GCC. |
6305f20a | 8 | // |
cbecceb9 | 9 | // GCC is free software; you can redistribute it and/or modify |
6305f20a | 10 | // it under the terms of the GNU General Public License as published by |
748086b7 | 11 | // the Free Software Foundation; either version 3, or (at your option) |
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12 | // any later version. |
13 | // | |
cbecceb9 | 14 | // GCC is distributed in the hope that it will be useful, |
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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 | // | |
748086b7 JJ |
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/>. | |
6305f20a | 27 | |
669f7a03 | 28 | /** @file new |
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29 | * This is a Standard C++ Library header. |
30 | * | |
ffe94f83 | 31 | * The header @c new defines several functions to manage dynamic memory and |
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32 | * handling memory allocation errors; see |
33 | * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. | |
34 | */ | |
35 | ||
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36 | #ifndef _NEW |
37 | #define _NEW | |
6305f20a | 38 | |
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39 | #pragma GCC system_header |
40 | ||
6305f20a | 41 | #include <cstddef> |
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42 | #include <exception> |
43 | ||
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44 | #pragma GCC visibility push(default) |
45 | ||
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46 | extern "C++" { |
47 | ||
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48 | namespace std |
49 | { | |
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50 | /** |
51 | * @brief Exception possibly thrown by @c new. | |
5b9daa7e | 52 | * @ingroup exceptions |
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53 | * |
54 | * @c bad_alloc (or classes derived from it) is used to report allocation | |
669f7a03 | 55 | * errors from the throwing forms of @c new. */ |
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56 | class bad_alloc : public exception |
57 | { | |
6305f20a | 58 | public: |
f68147f7 | 59 | bad_alloc() throw() { } |
949d9ae1 | 60 | |
e05cd3dd PC |
61 | // This declaration is not useless: |
62 | // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 | |
d66ae36a | 63 | virtual ~bad_alloc() throw(); |
949d9ae1 | 64 | |
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65 | // See comment in eh_exception.cc. |
66 | virtual const char* what() const throw(); | |
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67 | }; |
68 | ||
0c952af3 | 69 | struct nothrow_t { }; |
949d9ae1 | 70 | |
6305f20a | 71 | extern const nothrow_t nothrow; |
949d9ae1 | 72 | |
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73 | /** If you write your own error handler to be called by @c new, it must |
74 | * be of this type. */ | |
6305f20a | 75 | typedef void (*new_handler)(); |
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76 | |
77 | /// Takes a replacement handler as the argument, returns the | |
78 | /// previous handler. | |
984812cd | 79 | new_handler set_new_handler(new_handler) throw(); |
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80 | } // namespace std |
81 | ||
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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 | */ | |
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93 | void* operator new(std::size_t) throw (std::bad_alloc); |
94 | void* operator new[](std::size_t) throw (std::bad_alloc); | |
95 | void operator delete(void*) throw(); | |
96 | void operator delete[](void*) throw(); | |
97 | void* operator new(std::size_t, const std::nothrow_t&) throw(); | |
98 | void* operator new[](std::size_t, const std::nothrow_t&) throw(); | |
99 | void operator delete(void*, const std::nothrow_t&) throw(); | |
100 | void operator delete[](void*, const std::nothrow_t&) throw(); | |
6305f20a | 101 | |
0c952af3 | 102 | // Default placement versions of operator new. |
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103 | inline void* operator new(std::size_t, void* __p) throw() { return __p; } |
104 | inline void* operator new[](std::size_t, void* __p) throw() { return __p; } | |
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105 | |
106 | // Default placement versions of operator delete. | |
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107 | inline void operator delete (void*, void*) throw() { } |
108 | inline void operator delete[](void*, void*) throw() { } | |
669f7a03 | 109 | //@} |
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110 | } // extern "C++" |
111 | ||
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112 | #pragma GCC visibility pop |
113 | ||
6305f20a | 114 | #endif |