1*404b540aSrobert // Support routines for the -*- C++ -*- dynamic memory management.
2*404b540aSrobert
3*404b540aSrobert // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004
4*404b540aSrobert // Free Software Foundation
5*404b540aSrobert //
6*404b540aSrobert // This file is part of GCC.
7*404b540aSrobert //
8*404b540aSrobert // GCC is free software; you can redistribute it and/or modify
9*404b540aSrobert // it under the terms of the GNU General Public License as published by
10*404b540aSrobert // the Free Software Foundation; either version 2, or (at your option)
11*404b540aSrobert // any later version.
12*404b540aSrobert //
13*404b540aSrobert // GCC is distributed in the hope that it will be useful,
14*404b540aSrobert // but WITHOUT ANY WARRANTY; without even the implied warranty of
15*404b540aSrobert // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16*404b540aSrobert // GNU General Public License for more details.
17*404b540aSrobert //
18*404b540aSrobert // You should have received a copy of the GNU General Public License
19*404b540aSrobert // along with GCC; see the file COPYING. If not, write to
20*404b540aSrobert // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21*404b540aSrobert // Boston, MA 02110-1301, USA.
22*404b540aSrobert //
23*404b540aSrobert // As a special exception, you may use this file as part of a free software
24*404b540aSrobert // library without restriction. Specifically, if other files instantiate
25*404b540aSrobert // templates or use macros or inline functions from this file, or you compile
26*404b540aSrobert // this file and link it with other files to produce an executable, this
27*404b540aSrobert // file does not by itself cause the resulting executable to be covered by
28*404b540aSrobert // the GNU General Public License. This exception does not however
29*404b540aSrobert // invalidate any other reasons why the executable file might be covered by
30*404b540aSrobert // the GNU General Public License.
31*404b540aSrobert
32*404b540aSrobert #include <bits/c++config.h>
33*404b540aSrobert #include <cstdlib>
34*404b540aSrobert #include <exception_defines.h>
35*404b540aSrobert #include "new"
36*404b540aSrobert
37*404b540aSrobert using std::new_handler;
38*404b540aSrobert using std::bad_alloc;
39*404b540aSrobert #if _GLIBCXX_HOSTED
40*404b540aSrobert using std::malloc;
41*404b540aSrobert #else
42*404b540aSrobert // A freestanding C runtime may not provide "malloc" -- but there is no
43*404b540aSrobert // other reasonable way to implement "operator new".
44*404b540aSrobert extern "C" void *malloc (std::size_t);
45*404b540aSrobert #endif
46*404b540aSrobert
47*404b540aSrobert extern new_handler __new_handler;
48*404b540aSrobert
49*404b540aSrobert _GLIBCXX_WEAK_DEFINITION void *
operator new(std::size_t sz)50*404b540aSrobert operator new (std::size_t sz) throw (std::bad_alloc)
51*404b540aSrobert {
52*404b540aSrobert void *p;
53*404b540aSrobert
54*404b540aSrobert /* malloc (0) is unpredictable; avoid it. */
55*404b540aSrobert if (sz == 0)
56*404b540aSrobert sz = 1;
57*404b540aSrobert p = (void *) malloc (sz);
58*404b540aSrobert while (p == 0)
59*404b540aSrobert {
60*404b540aSrobert new_handler handler = __new_handler;
61*404b540aSrobert if (! handler)
62*404b540aSrobert #ifdef __EXCEPTIONS
63*404b540aSrobert throw bad_alloc();
64*404b540aSrobert #else
65*404b540aSrobert std::abort();
66*404b540aSrobert #endif
67*404b540aSrobert handler ();
68*404b540aSrobert p = (void *) malloc (sz);
69*404b540aSrobert }
70*404b540aSrobert
71*404b540aSrobert return p;
72*404b540aSrobert }
73