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
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) 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();
101 :
102 : // Default placement versions of operator new.
103 761021 : 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; }
105 :
106 : // Default placement versions of operator delete.
107 0 : inline void operator delete (void*, void*) throw() { }
108 : inline void operator delete[](void*, void*) throw() { }
109 : //@}
110 : } // extern "C++"
111 :
112 : #pragma GCC visibility pop
113 :
114 : #endif
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