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 bad_alloc : public exception
59 0 : {
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 2036 : 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 0 : 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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