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