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1 : : // The -*- C++ -*- dynamic memory management header.
2 : :
3 : : // Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4 : : // 2003, 2004, 2005, 2006, 2007
5 : : // Free Software Foundation
6 : :
7 : : // This file is part of GCC.
8 : : //
9 : : // GCC is free software; you can redistribute it and/or modify
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 : : //
14 : : // GCC is distributed in the hope that it will be useful,
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
20 : : // along with GCC; see the file COPYING. If not, write to
21 : : // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 : : // Boston, MA 02110-1301, USA.
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 : :
33 : : /** @file new
34 : : * This is a Standard C++ Library header.
35 : : *
36 : : * The header @c new defines several functions to manage dynamic memory and
37 : : * handling memory allocation errors; see
38 : : * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
39 : : */
40 : :
41 : : #ifndef _NEW
42 : : #define _NEW
43 : :
44 : : #include <cstddef>
45 : : #include <exception>
46 : :
47 : : #pragma GCC visibility push(default)
48 : :
49 : : extern "C++" {
50 : :
51 : : namespace std
52 : : {
53 : : /**
54 : : * @brief Exception possibly thrown by @c new.
55 : : *
56 : : * @c bad_alloc (or classes derived from it) is used to report allocation
57 : : * errors from the throwing forms of @c new. */
58 : : class _GLIBCXX_IMPORT bad_alloc : public exception
59 : : {
60 : : public:
61 : : bad_alloc() throw() { }
62 : :
63 : : // This declaration is not useless:
64 : : // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
65 : : virtual ~bad_alloc() throw();
66 : :
67 : : // See comment in eh_exception.cc.
68 : : virtual const char* what() const throw();
69 : : };
70 : :
71 : : struct nothrow_t { };
72 : :
73 : : extern const nothrow_t nothrow;
74 : :
75 : : /** If you write your own error handler to be called by @c new, it must
76 : : * be of this type. */
77 : : typedef void (*new_handler)();
78 : :
79 : : /// Takes a replacement handler as the argument, returns the
80 : : /// previous handler.
81 : : new_handler set_new_handler(new_handler) throw();
82 : : } // namespace std
83 : :
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 : : */
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();
103 : :
104 : : // Default placement versions of operator new.
105 : 344379 : 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; }
107 : :
108 : : // Default placement versions of operator delete.
109 : : inline void operator delete (void*, void*) throw() { }
110 : : inline void operator delete[](void*, void*) throw() { }
111 : : //@}
112 : : } // extern "C++"
113 : :
114 : : #pragma GCC visibility pop
115 : :
116 : : #endif
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