1 : // The -*- C++ -*- dynamic memory management header.
2 :
3 : // Copyright (C) 1994, 1996, 1997, 1998, 2000, 2001, 2002
4 : // Free Software Foundation
5 :
6 : // This file is part of GCC.
7 : //
8 : // GCC is free software; you can redistribute it and/or modify
9 : // it under the terms of the GNU General Public License as published by
10 : // the Free Software Foundation; either version 2, or (at your option)
11 : // any later version.
12 : //
13 : // GCC is distributed in the hope that it will be useful,
14 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 : // GNU General Public License for more details.
17 : //
18 : // You should have received a copy of the GNU General Public License
19 : // along with GCC; see the file COPYING. If not, write to
20 : // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 : // Boston, MA 02110-1301, USA.
22 :
23 : // As a special exception, you may use this file as part of a free software
24 : // library without restriction. Specifically, if other files instantiate
25 : // templates or use macros or inline functions from this file, or you compile
26 : // this file and link it with other files to produce an executable, this
27 : // file does not by itself cause the resulting executable to be covered by
28 : // the GNU General Public License. This exception does not however
29 : // invalidate any other reasons why the executable file might be covered by
30 : // the GNU General Public License.
31 :
32 : /** @file new
33 : * The header @c new defines several functions to manage dynamic memory and
34 : * handling memory allocation errors; see
35 : * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
36 : */
37 :
38 : #ifndef _NEW
39 : #define _NEW
40 :
41 : #include <cstddef>
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 : *
53 : * @c bad_alloc (or classes derived from it) is used to report allocation
54 : * errors from the throwing forms of @c new. */
55 : class bad_alloc : public exception
56 : {
57 : public:
58 : bad_alloc() throw() { }
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 :
64 : struct nothrow_t { };
65 : extern const nothrow_t nothrow;
66 : /** If you write your own error handler to be called by @c new, it must
67 : * be of this type. */
68 : typedef void (*new_handler)();
69 : /// Takes a replacement handler as the argument, returns the previous handler.
70 : new_handler set_new_handler(new_handler) throw();
71 : } // namespace std
72 :
73 : //@{
74 : /** These are replaceable signatures:
75 : * - normal single new and delete (no arguments, throw @c bad_alloc on error)
76 : * - normal array new and delete (same)
77 : * - @c nothrow single new and delete (take a @c nothrow argument, return
78 : * @c NULL on error)
79 : * - @c nothrow array new and delete (same)
80 : *
81 : * Placement new and delete signatures (take a memory address argument,
82 : * does nothing) may not be replaced by a user's program.
83 : */
84 : void* operator new(std::size_t) throw (std::bad_alloc);
85 : void* operator new[](std::size_t) throw (std::bad_alloc);
86 : void operator delete(void*) throw();
87 : void operator delete[](void*) throw();
88 : void* operator new(std::size_t, const std::nothrow_t&) throw();
89 : void* operator new[](std::size_t, const std::nothrow_t&) throw();
90 : void operator delete(void*, const std::nothrow_t&) throw();
91 : void operator delete[](void*, const std::nothrow_t&) throw();
92 :
93 : // Default placement versions of operator new.
94 625663366 : inline void* operator new(std::size_t, void* __p) throw() { return __p; }
95 : inline void* operator new[](std::size_t, void* __p) throw() { return __p; }
96 :
97 : // Default placement versions of operator delete.
98 0 : inline void operator delete (void*, void*) throw() { }
99 : inline void operator delete[](void*, void*) throw() { }
100 : //@}
101 : } // extern "C++"
102 :
103 : #pragma GCC visibility pop
104 :
105 : #endif
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