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1 : // The -*- C++ -*- dynamic memory management header.
2 :
3 : // Copyright (C) 1994-2013 Free Software Foundation, Inc.
4 :
5 : // This file is part of GCC.
6 : //
7 : // GCC is free software; you can redistribute it and/or modify
8 : // it under the terms of the GNU General Public License as published by
9 : // the Free Software Foundation; either version 3, or (at your option)
10 : // any later version.
11 : //
12 : // GCC is distributed in the hope that it will be useful,
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 : //
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/>.
25 :
26 : /** @file new
27 : * This is a Standard C++ Library header.
28 : *
29 : * The header @c new defines several functions to manage dynamic memory and
30 : * handling memory allocation errors; see
31 : * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
32 : */
33 :
34 : #ifndef _NEW
35 : #define _NEW
36 :
37 : #pragma GCC system_header
38 :
39 : #include <bits/c++config.h>
40 : #include <exception>
41 :
42 : #pragma GCC visibility push(default)
43 :
44 : extern "C++" {
45 :
46 : namespace std
47 : {
48 : /**
49 : * @brief Exception possibly thrown by @c new.
50 : * @ingroup exceptions
51 : *
52 : * @c bad_alloc (or classes derived from it) is used to report allocation
53 : * errors from the throwing forms of @c new. */
54 : class bad_alloc : public exception
55 : {
56 : public:
57 : bad_alloc() throw() { }
58 :
59 : // This declaration is not useless:
60 : // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
61 : virtual ~bad_alloc() throw();
62 :
63 : // See comment in eh_exception.cc.
64 : virtual const char* what() const throw();
65 : };
66 :
67 : struct nothrow_t { };
68 :
69 : extern const nothrow_t nothrow;
70 :
71 : /** If you write your own error handler to be called by @c new, it must
72 : * be of this type. */
73 : typedef void (*new_handler)();
74 :
75 : /// Takes a replacement handler as the argument, returns the
76 : /// previous handler.
77 : new_handler set_new_handler(new_handler) throw();
78 : } // namespace std
79 :
80 : //@{
81 : /** These are replaceable signatures:
82 : * - normal single new and delete (no arguments, throw @c bad_alloc on error)
83 : * - normal array new and delete (same)
84 : * - @c nothrow single new and delete (take a @c nothrow argument, return
85 : * @c NULL on error)
86 : * - @c nothrow array new and delete (same)
87 : *
88 : * Placement new and delete signatures (take a memory address argument,
89 : * does nothing) may not be replaced by a user's program.
90 : */
91 : void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
92 : __attribute__((__externally_visible__));
93 : void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
94 : __attribute__((__externally_visible__));
95 : void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
96 : __attribute__((__externally_visible__));
97 : void operator delete[](void*) _GLIBCXX_USE_NOEXCEPT
98 : __attribute__((__externally_visible__));
99 : void* operator new(std::size_t, const std::nothrow_t&) _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 delete(void*, 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 :
108 : // Default placement versions of operator new.
109 8391551 : inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
110 8391551 : { return __p; }
111 : inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
112 : { return __p; }
113 :
114 : // Default placement versions of operator delete.
115 0 : inline void operator delete (void*, void*) _GLIBCXX_USE_NOEXCEPT { }
116 : inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { }
117 : //@}
118 : } // extern "C++"
119 :
120 : #pragma GCC visibility pop
121 :
122 : #endif
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