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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, 2009, 2010, 2011
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 3, 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 : : // 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/>.
27 : :
28 : : /** @file new
29 : : * This is a Standard C++ Library header.
30 : : *
31 : : * The header @c new defines several functions to manage dynamic memory and
32 : : * handling memory allocation errors; see
33 : : * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
34 : : */
35 : :
36 : : #ifndef _NEW
37 : : #define _NEW
38 : :
39 : : #pragma GCC system_header
40 : :
41 : : #include <bits/c++config.h>
42 : : #include <exception>
43 : :
44 : : #pragma GCC visibility push(default)
45 : :
46 : : extern "C++" {
47 : :
48 : : namespace std
49 : : {
50 : : /**
51 : : * @brief Exception possibly thrown by @c new.
52 : : * @ingroup exceptions
53 : : *
54 : : * @c bad_alloc (or classes derived from it) is used to report allocation
55 : : * errors from the throwing forms of @c new. */
56 : : class bad_alloc : public exception
57 : : {
58 : : public:
59 : : bad_alloc() throw() { }
60 : :
61 : : // This declaration is not useless:
62 : : // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
63 : : virtual ~bad_alloc() throw();
64 : :
65 : : // See comment in eh_exception.cc.
66 : : virtual const char* what() const throw();
67 : : };
68 : :
69 : : struct nothrow_t { };
70 : :
71 : : extern const nothrow_t nothrow;
72 : :
73 : : /** If you write your own error handler to be called by @c new, it must
74 : : * be of this type. */
75 : : typedef void (*new_handler)();
76 : :
77 : : /// Takes a replacement handler as the argument, returns the
78 : : /// previous handler.
79 : : new_handler set_new_handler(new_handler) throw();
80 : : } // namespace std
81 : :
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 : : */
93 : : void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
94 : : __attribute__((__externally_visible__));
95 : : void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
96 : : __attribute__((__externally_visible__));
97 : : void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
98 : : __attribute__((__externally_visible__));
99 : : void operator delete[](void*) _GLIBCXX_USE_NOEXCEPT
100 : : __attribute__((__externally_visible__));
101 : : void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
102 : : __attribute__((__externally_visible__));
103 : : void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
104 : : __attribute__((__externally_visible__));
105 : : void operator delete(void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
106 : : __attribute__((__externally_visible__));
107 : : void operator delete[](void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
108 : : __attribute__((__externally_visible__));
109 : :
110 : : // Default placement versions of operator new.
111 : 613766625 : inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
112 : 613766625 : { return __p; }
113 : : inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
114 : : { return __p; }
115 : :
116 : : // Default placement versions of operator delete.
117 : 0 : inline void operator delete (void*, void*) _GLIBCXX_USE_NOEXCEPT { }
118 : : inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { }
119 : : //@}
120 : : } // extern "C++"
121 : :
122 : : #pragma GCC visibility pop
123 : :
124 : : #endif
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