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 34 using std::new_handler; 35 using std::bad_alloc; 36 37 extern "C" void *malloc (std::size_t); 38 extern new_handler __new_handler; 39 40 _GLIBCXX_WEAK_DEFINITION void * 41 operator 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