197403Sobrien// Support routines for the -*- C++ -*- dynamic memory management. 2169691Skan 3169691Skan// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004 4169691Skan// Free Software Foundation 597403Sobrien// 6132720Skan// This file is part of GCC. 797403Sobrien// 8132720Skan// GCC is free software; you can redistribute it and/or modify 997403Sobrien// it under the terms of the GNU General Public License as published by 1097403Sobrien// the Free Software Foundation; either version 2, or (at your option) 1197403Sobrien// any later version. 1297403Sobrien// 13132720Skan// GCC is distributed in the hope that it will be useful, 1497403Sobrien// but WITHOUT ANY WARRANTY; without even the implied warranty of 1597403Sobrien// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1697403Sobrien// GNU General Public License for more details. 1797403Sobrien// 1897403Sobrien// You should have received a copy of the GNU General Public License 19132720Skan// along with GCC; see the file COPYING. If not, write to 20169691Skan// the Free Software Foundation, 51 Franklin Street, Fifth Floor, 21169691Skan// Boston, MA 02110-1301, USA. 2297403Sobrien// 2397403Sobrien// As a special exception, you may use this file as part of a free software 2497403Sobrien// library without restriction. Specifically, if other files instantiate 2597403Sobrien// templates or use macros or inline functions from this file, or you compile 2697403Sobrien// this file and link it with other files to produce an executable, this 2797403Sobrien// file does not by itself cause the resulting executable to be covered by 2897403Sobrien// the GNU General Public License. This exception does not however 2997403Sobrien// invalidate any other reasons why the executable file might be covered by 3097403Sobrien// the GNU General Public License. 3197403Sobrien 32169691Skan#include <bits/c++config.h> 3397403Sobrien#include <cstdlib> 3497403Sobrien#include <exception_defines.h> 35169691Skan#include "new" 3697403Sobrien 3797403Sobrienusing std::new_handler; 3897403Sobrienusing std::bad_alloc; 39169691Skan#if _GLIBCXX_HOSTED 40102782Skanusing std::malloc; 41169691Skan#else 42169691Skan// A freestanding C runtime may not provide "malloc" -- but there is no 43169691Skan// other reasonable way to implement "operator new". 44169691Skanextern "C" void *malloc (std::size_t); 45169691Skan#endif 4697403Sobrien 4797403Sobrienextern new_handler __new_handler; 4897403Sobrien 49169691Skan_GLIBCXX_WEAK_DEFINITION void * 5097403Sobrienoperator new (std::size_t sz) throw (std::bad_alloc) 5197403Sobrien{ 5297403Sobrien void *p; 5397403Sobrien 5497403Sobrien /* malloc (0) is unpredictable; avoid it. */ 5597403Sobrien if (sz == 0) 5697403Sobrien sz = 1; 5797403Sobrien p = (void *) malloc (sz); 5897403Sobrien while (p == 0) 5997403Sobrien { 6097403Sobrien new_handler handler = __new_handler; 6197403Sobrien if (! handler) 6297403Sobrien#ifdef __EXCEPTIONS 6397403Sobrien throw bad_alloc(); 6497403Sobrien#else 6597403Sobrien std::abort(); 6697403Sobrien#endif 6797403Sobrien handler (); 6897403Sobrien p = (void *) malloc (sz); 6997403Sobrien } 7097403Sobrien 7197403Sobrien return p; 7297403Sobrien} 73