1// Support routines for the -*- C++ -*- dynamic memory management. 2// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004, 2009 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 <exception_defines.h> 28#include "new" 29 30using std::new_handler; 31using std::bad_alloc; 32 33extern "C" void *malloc (std::size_t); 34extern new_handler __new_handler; 35 36_GLIBCXX_WEAK_DEFINITION void * 37operator new (std::size_t sz, const std::nothrow_t&) throw() 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