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1 | // Support routines for the -*- C++ -*- dynamic memory management. |
2 | // Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation | |
3 | // | |
4 | // This file is part of GNU CC. | |
5 | // | |
6 | // GNU CC 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 2, or (at your option) | |
9 | // any later version. | |
10 | // | |
11 | // GNU CC 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 | // You should have received a copy of the GNU General Public License | |
17 | // along with GNU CC; see the file COPYING. If not, write to | |
18 | // the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | // Boston, MA 02111-1307, USA. | |
20 | // | |
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | #include "new" | |
31 | using std::new_handler; | |
32 | using std::bad_alloc; | |
33 | ||
6b76f569 | 34 | extern "C" void *malloc (std::size_t); |
06bd10fb BK |
35 | extern new_handler __new_handler; |
36 | ||
37 | void * | |
6b76f569 | 38 | operator new (std::size_t sz, const std::nothrow_t&) throw() |
06bd10fb BK |
39 | { |
40 | void *p; | |
41 | ||
42 | /* malloc (0) is unpredictable; avoid it. */ | |
43 | if (sz == 0) | |
44 | sz = 1; | |
45 | p = (void *) malloc (sz); | |
46 | while (p == 0) | |
47 | { | |
48 | new_handler handler = __new_handler; | |
49 | if (! handler) | |
50 | return 0; | |
51 | try | |
52 | { | |
53 | handler (); | |
54 | } | |
55 | catch (bad_alloc &) | |
56 | { | |
57 | return 0; | |
58 | } | |
59 | ||
60 | p = (void *) malloc (sz); | |
61 | } | |
62 | ||
63 | return p; | |
64 | } |