libstdc++
cxxabi_forced.h
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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