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6305f20a | 1 | // The -*- C++ -*- dynamic memory management header. |
0c952af3 | 2 | |
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3 | // Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
4 | // 2003, 2004, 2005, 2006, 2007 | |
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 |
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10 | // it under the terms of the GNU General Public License as published by |
11 | // the Free Software Foundation; either version 2, or (at your option) | |
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 | // | |
19 | // You should have received a copy of the GNU General Public License | |
cbecceb9 | 20 | // along with GCC; see the file COPYING. If not, write to |
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21 | // the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
22 | // Boston, MA 02110-1301, USA. | |
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23 | |
24 | // As a special exception, you may use this file as part of a free software | |
25 | // library without restriction. Specifically, if other files instantiate | |
26 | // templates or use macros or inline functions from this file, or you compile | |
27 | // this file and link it with other files to produce an executable, this | |
28 | // file does not by itself cause the resulting executable to be covered by | |
29 | // the GNU General Public License. This exception does not however | |
30 | // invalidate any other reasons why the executable file might be covered by | |
31 | // the GNU General Public License. | |
32 | ||
669f7a03 | 33 | /** @file new |
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34 | * This is a Standard C++ Library header. |
35 | * | |
ffe94f83 | 36 | * The header @c new defines several functions to manage dynamic memory and |
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37 | * handling memory allocation errors; see |
38 | * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more. | |
39 | */ | |
40 | ||
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41 | #ifndef _NEW |
42 | #define _NEW | |
6305f20a | 43 | |
6305f20a | 44 | #include <cstddef> |
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45 | #include <exception> |
46 | ||
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47 | #pragma GCC visibility push(default) |
48 | ||
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49 | extern "C++" { |
50 | ||
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51 | namespace std |
52 | { | |
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53 | /** |
54 | * @brief Exception possibly thrown by @c new. | |
55 | * | |
56 | * @c bad_alloc (or classes derived from it) is used to report allocation | |
669f7a03 | 57 | * errors from the throwing forms of @c new. */ |
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58 | class bad_alloc : public exception |
59 | { | |
6305f20a | 60 | public: |
f68147f7 | 61 | bad_alloc() throw() { } |
949d9ae1 | 62 | |
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63 | // This declaration is not useless: |
64 | // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 | |
d66ae36a | 65 | virtual ~bad_alloc() throw(); |
949d9ae1 | 66 | |
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67 | // See comment in eh_exception.cc. |
68 | virtual const char* what() const throw(); | |
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69 | }; |
70 | ||
0c952af3 | 71 | struct nothrow_t { }; |
949d9ae1 | 72 | |
6305f20a | 73 | extern const nothrow_t nothrow; |
949d9ae1 | 74 | |
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75 | /** If you write your own error handler to be called by @c new, it must |
76 | * be of this type. */ | |
6305f20a | 77 | typedef void (*new_handler)(); |
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78 | |
79 | /// Takes a replacement handler as the argument, returns the | |
80 | /// previous handler. | |
984812cd | 81 | new_handler set_new_handler(new_handler) throw(); |
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82 | } // namespace std |
83 | ||
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84 | //@{ |
85 | /** These are replaceable signatures: | |
86 | * - normal single new and delete (no arguments, throw @c bad_alloc on error) | |
87 | * - normal array new and delete (same) | |
88 | * - @c nothrow single new and delete (take a @c nothrow argument, return | |
89 | * @c NULL on error) | |
90 | * - @c nothrow array new and delete (same) | |
91 | * | |
92 | * Placement new and delete signatures (take a memory address argument, | |
93 | * does nothing) may not be replaced by a user's program. | |
94 | */ | |
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95 | void* operator new(std::size_t) throw (std::bad_alloc); |
96 | void* operator new[](std::size_t) throw (std::bad_alloc); | |
97 | void operator delete(void*) throw(); | |
98 | void operator delete[](void*) throw(); | |
99 | void* operator new(std::size_t, const std::nothrow_t&) throw(); | |
100 | void* operator new[](std::size_t, const std::nothrow_t&) throw(); | |
101 | void operator delete(void*, const std::nothrow_t&) throw(); | |
102 | void operator delete[](void*, const std::nothrow_t&) throw(); | |
6305f20a | 103 | |
0c952af3 | 104 | // Default placement versions of operator new. |
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105 | inline void* operator new(std::size_t, void* __p) throw() { return __p; } |
106 | inline void* operator new[](std::size_t, void* __p) throw() { return __p; } | |
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107 | |
108 | // Default placement versions of operator delete. | |
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109 | inline void operator delete (void*, void*) throw() { } |
110 | inline void operator delete[](void*, void*) throw() { } | |
669f7a03 | 111 | //@} |
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112 | } // extern "C++" |
113 | ||
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114 | #pragma GCC visibility pop |
115 | ||
6305f20a | 116 | #endif |