1 // Support routines for the -*- C++ -*- dynamic memory management. 2 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004, 2009, 2011 3 // Free Software Foundation 4 // 5 // This file is part of GCC. 6 // 7 // GCC is free software; you can redistribute it and/or modify 8 // it under the terms of the GNU General Public License as published by 9 // the Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 // 12 // GCC is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 #include <bits/c++config.h> 27 #include <bits/exception_defines.h> 28 #include "new" 29 30 using std::new_handler; 31 using std::bad_alloc; 32 33 extern "C" void *malloc (std::size_t); 34 extern new_handler __new_handler; 35 36 _GLIBCXX_WEAK_DEFINITION void * 37 operator new (std::size_t sz, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT 38 { 39 void *p; 40 41 /* malloc (0) is unpredictable; avoid it. */ 42 if (sz == 0) 43 sz = 1; 44 p = (void *) malloc (sz); 45 while (p == 0) 46 { 47 new_handler handler = __new_handler; 48 if (! handler) 49 return 0; 50 __try 51 { 52 handler (); 53 } 54 __catch(const bad_alloc&) 55 { 56 return 0; 57 } 58 59 p = (void *) malloc (sz); 60 } 61 62 return p; 63 } 64