| // Support routines for the -*- C++ -*- dynamic memory management. |
| // Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| // |
| // This file is part of GCC. |
| // |
| // GCC is free software; you can redistribute it and/or modify |
| // it under the terms of the GNU General Public License as published by |
| // the Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| // |
| // GCC is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| // |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| #include <bits/c++config.h> |
| #include <bits/exception_defines.h> |
| #include "new" |
| |
| using std::new_handler; |
| using std::bad_alloc; |
| |
| extern "C" void *malloc (std::size_t); |
| |
| _GLIBCXX_WEAK_DEFINITION void * |
| operator new (std::size_t sz, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT |
| { |
| void *p; |
| |
| /* malloc (0) is unpredictable; avoid it. */ |
| if (sz == 0) |
| sz = 1; |
| |
| while (__builtin_expect ((p = malloc (sz)) == 0, false)) |
| { |
| new_handler handler = std::get_new_handler (); |
| if (! handler) |
| return 0; |
| __try |
| { |
| handler (); |
| } |
| __catch(const bad_alloc&) |
| { |
| return 0; |
| } |
| } |
| |
| return p; |
| } |