1// cxxabi.h subset for cancellation -*- C++ -*- 
2  
3// Copyright (C) 2007-2019 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