1// Support routines for the -*- C++ -*- dynamic memory management. 2// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004 Free Software Foundation 3// 4// This file is part of GCC. 5// 6// GCC is free software; you can redistribute it and/or modify 7// it under the terms of the GNU General Public License as published by 8// the Free Software Foundation; either version 2, or (at your option) 9// any later version. 10// 11// GCC is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15// 16// You should have received a copy of the GNU General Public License 17// along with GCC; see the file COPYING. If not, write to 18// the Free Software Foundation, 51 Franklin Street, Fifth Floor, 19// Boston, MA 02110-1301, USA. 20// 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30#include <bits/c++config.h> 31#include <exception_defines.h> 32#include "new" 33 34using std::new_handler; 35using std::bad_alloc; 36 37extern "C" void *malloc (std::size_t); 38extern new_handler __new_handler; 39 40_GLIBCXX_WEAK_DEFINITION void * 41operator new (std::size_t sz, const std::nothrow_t&) throw() 42{ 43 void *p; 44 45 /* malloc (0) is unpredictable; avoid it. */ 46 if (sz == 0) 47 sz = 1; 48 p = (void *) malloc (sz); 49 while (p == 0) 50 { 51 new_handler handler = __new_handler; 52 if (! handler) 53 return 0; 54 try 55 { 56 handler (); 57 } 58 catch (bad_alloc &) 59 { 60 return 0; 61 } 62 63 p = (void *) malloc (sz); 64 } 65 66 return p; 67} 68