libstdc++
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00001 // cxxabi.h subset for cancellation -*- C++ -*- 00002 00003 // Copyright (C) 2007, 2009, 2010, 2011 Free Software Foundation, Inc. 00004 // 00005 // This file is part of GCC. 00006 // 00007 // GCC is free software; you can redistribute it and/or modify 00008 // it under the terms of the GNU General Public License as published by 00009 // the Free Software Foundation; either version 3, or (at your option) 00010 // any later version. 00011 // 00012 // GCC is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 // GNU General Public License for more details. 00016 // 00017 // Under Section 7 of GPL version 3, you are granted additional 00018 // permissions described in the GCC Runtime Library Exception, version 00019 // 3.1, as published by the Free Software Foundation. 00020 00021 // You should have received a copy of the GNU General Public License and 00022 // a copy of the GCC Runtime Library Exception along with this program; 00023 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00024 // <http://www.gnu.org/licenses/>. 00025 00026 /** @file bits/cxxabi_forced.h 00027 * This is an internal header file, included by other library headers. 00028 * Do not attempt to use it directly. @headername{cxxabi.h} 00029 */ 00030 00031 #ifndef _CXXABI_FORCED_H 00032 #define _CXXABI_FORCED_H 1 00033 00034 #pragma GCC system_header 00035 00036 #pragma GCC visibility push(default) 00037 00038 #ifdef __cplusplus 00039 namespace __cxxabiv1 00040 { 00041 /** 00042 * @brief Thrown as part of forced unwinding. 00043 * @ingroup exceptions 00044 * 00045 * A magic placeholder class that can be caught by reference to 00046 * recognize forced unwinding. 00047 */ 00048 class __forced_unwind 00049 { 00050 virtual ~__forced_unwind() throw(); 00051 00052 // Prevent catch by value. 00053 virtual void __pure_dummy() = 0; 00054 }; 00055 } 00056 #endif // __cplusplus 00057 00058 #pragma GCC visibility pop 00059 00060 #endif // __CXXABI_FORCED_H