1*38fd1498Szrj // Support routines for the -*- C++ -*- dynamic memory management.
2*38fd1498Szrj // Copyright (C) 1997-2018 Free Software Foundation, Inc.
3*38fd1498Szrj //
4*38fd1498Szrj // This file is part of GCC.
5*38fd1498Szrj //
6*38fd1498Szrj // GCC is free software; you can redistribute it and/or modify
7*38fd1498Szrj // it under the terms of the GNU General Public License as published by
8*38fd1498Szrj // the Free Software Foundation; either version 3, or (at your option)
9*38fd1498Szrj // any later version.
10*38fd1498Szrj //
11*38fd1498Szrj // GCC is distributed in the hope that it will be useful,
12*38fd1498Szrj // but WITHOUT ANY WARRANTY; without even the implied warranty of
13*38fd1498Szrj // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14*38fd1498Szrj // GNU General Public License for more details.
15*38fd1498Szrj //
16*38fd1498Szrj // Under Section 7 of GPL version 3, you are granted additional
17*38fd1498Szrj // permissions described in the GCC Runtime Library Exception, version
18*38fd1498Szrj // 3.1, as published by the Free Software Foundation.
19*38fd1498Szrj
20*38fd1498Szrj // You should have received a copy of the GNU General Public License and
21*38fd1498Szrj // a copy of the GCC Runtime Library Exception along with this program;
22*38fd1498Szrj // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23*38fd1498Szrj // <http://www.gnu.org/licenses/>.
24*38fd1498Szrj
25*38fd1498Szrj #include <bits/c++config.h>
26*38fd1498Szrj #include <bits/exception_defines.h>
27*38fd1498Szrj #include "new"
28*38fd1498Szrj
29*38fd1498Szrj using std::new_handler;
30*38fd1498Szrj using std::bad_alloc;
31*38fd1498Szrj
32*38fd1498Szrj extern "C" void *malloc (std::size_t);
33*38fd1498Szrj
34*38fd1498Szrj _GLIBCXX_WEAK_DEFINITION void *
operator new(std::size_t sz,const std::nothrow_t &)35*38fd1498Szrj operator new (std::size_t sz, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
36*38fd1498Szrj {
37*38fd1498Szrj void *p;
38*38fd1498Szrj
39*38fd1498Szrj /* malloc (0) is unpredictable; avoid it. */
40*38fd1498Szrj if (sz == 0)
41*38fd1498Szrj sz = 1;
42*38fd1498Szrj
43*38fd1498Szrj while (__builtin_expect ((p = malloc (sz)) == 0, false))
44*38fd1498Szrj {
45*38fd1498Szrj new_handler handler = std::get_new_handler ();
46*38fd1498Szrj if (! handler)
47*38fd1498Szrj return 0;
48*38fd1498Szrj __try
49*38fd1498Szrj {
50*38fd1498Szrj handler ();
51*38fd1498Szrj }
52*38fd1498Szrj __catch(const bad_alloc&)
53*38fd1498Szrj {
54*38fd1498Szrj return 0;
55*38fd1498Szrj }
56*38fd1498Szrj }
57*38fd1498Szrj
58*38fd1498Szrj return p;
59*38fd1498Szrj }
60