1// cxxabi.h subset for cancellation -*- C++ -*- 2 3// Copyright (C) 2007, 2009, 2010, 2011 Free Software Foundation, Inc. 4// 5// This file is part of GCC. 6// 7// GCC is free software; you can redistribute it and/or modify 8// it under the terms of the GNU General Public License as published by 9// the Free Software Foundation; either version 3, or (at your option) 10// any later version. 11// 12// GCC is distributed in the hope that it will be useful, 13// but WITHOUT ANY WARRANTY; without even the implied warranty of 14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15// GNU General Public License for more details. 16// 17// Under Section 7 of GPL version 3, you are granted additional 18// permissions described in the GCC Runtime Library Exception, version 19// 3.1, as published by the Free Software Foundation. 20 21// You should have received a copy of the GNU General Public License and 22// a copy of the GCC Runtime Library Exception along with this program; 23// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24// <http://www.gnu.org/licenses/>. 25 26/** @file bits/cxxabi_forced.h 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. @headername{cxxabi.h} 29 */ 30 31#ifndef _CXXABI_FORCED_H 32#define _CXXABI_FORCED_H 1 33 34#pragma GCC system_header 35 36#pragma GCC visibility push(default) 37 38#ifdef __cplusplus 39namespace __cxxabiv1 40{ 41 /** 42 * @brief Thrown as part of forced unwinding. 43 * @ingroup exceptions 44 * 45 * A magic placeholder class that can be caught by reference to 46 * recognize forced unwinding. 47 */ 48 class __forced_unwind 49 { 50 virtual ~__forced_unwind() throw(); 51 52 // Prevent catch by value. 53 virtual void __pure_dummy() = 0; 54 }; 55} 56#endif // __cplusplus 57 58#pragma GCC visibility pop 59 60#endif // __CXXABI_FORCED_H 61