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1 | // Support routines for the -*- C++ -*- dynamic memory management. | |
2 | // Copyright (C) 1997-2014 Free Software Foundation, Inc. | |
3 | // | |
4 | // This file is part of GCC. | |
5 | // | |
6 | // GCC is free software; you can redistribute it and/or modify | |
7 | // it under the terms of the GNU General Public License as published by | |
8 | // the Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | // | |
11 | // GCC is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | // | |
16 | // Under Section 7 of GPL version 3, you are granted additional | |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | #include <bits/c++config.h> | |
26 | #include <bits/exception_defines.h> | |
27 | #include "new" | |
28 | ||
29 | using std::new_handler; | |
30 | using std::bad_alloc; | |
31 | ||
32 | extern "C" void *malloc (std::size_t); | |
33 | ||
34 | _GLIBCXX_WEAK_DEFINITION void * | |
35 | operator new (std::size_t sz, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT | |
36 | { | |
37 | void *p; | |
38 | ||
39 | /* malloc (0) is unpredictable; avoid it. */ | |
40 | if (sz == 0) | |
41 | sz = 1; | |
42 | p = (void *) malloc (sz); | |
43 | while (p == 0) | |
44 | { | |
45 | new_handler handler = std::get_new_handler (); | |
46 | if (! handler) | |
47 | return 0; | |
48 | __try | |
49 | { | |
50 | handler (); | |
51 | } | |
52 | __catch(const bad_alloc&) | |
53 | { | |
54 | return 0; | |
55 | } | |
56 | ||
57 | p = (void *) malloc (sz); | |
58 | } | |
59 | ||
60 | return p; | |
61 | } |