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1 // cxxabi.h subset for cancellation -*- C++ -*-
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2
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3 // Copyright (C) 2007-2020 Free Software Foundation, Inc.
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111
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4 //
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5 // This file is part of GCC.
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6 //
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7 // GCC is free software; you can redistribute it and/or modify
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8 // it under the terms of the GNU General Public License as published by
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9 // the Free Software Foundation; either version 3, or (at your option)
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10 // any later version.
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11 //
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12 // GCC is distributed in the hope that it will be useful,
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13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 // GNU General Public License for more details.
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16 //
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17 // Under Section 7 of GPL version 3, you are granted additional
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18 // permissions described in the GCC Runtime Library Exception, version
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19 // 3.1, as published by the Free Software Foundation.
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20
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21 // You should have received a copy of the GNU General Public License and
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22 // a copy of the GCC Runtime Library Exception along with this program;
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23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 // <http://www.gnu.org/licenses/>.
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25
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26 /** @file bits/cxxabi_forced.h
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27 * This is an internal header file, included by other library headers.
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28 * Do not attempt to use it directly. @headername{cxxabi.h}
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29 */
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30
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31 #ifndef _CXXABI_FORCED_H
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32 #define _CXXABI_FORCED_H 1
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33
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34 #pragma GCC system_header
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35
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36 #pragma GCC visibility push(default)
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37
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38 #ifdef __cplusplus
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39 namespace __cxxabiv1
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40 {
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41 /**
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42 * @brief Thrown as part of forced unwinding.
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43 * @ingroup exceptions
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44 *
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45 * A magic placeholder class that can be caught by reference to
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46 * recognize forced unwinding.
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47 */
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48 class __forced_unwind
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49 {
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50 virtual ~__forced_unwind() throw();
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51
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52 // Prevent catch by value.
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53 virtual void __pure_dummy() = 0;
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54 };
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55 }
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56 #endif // __cplusplus
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57
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58 #pragma GCC visibility pop
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59
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60 #endif // __CXXABI_FORCED_H
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