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diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.9.2/src/SignalHandler.h b/Build/source/texk/dvisvgm/dvisvgm-1.9.2/src/SignalHandler.h
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+/*************************************************************************
+** SignalHandler.h **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#ifndef DVISVGM_SIGNALHANDLER_H
+#define DVISVGM_SIGNALHANDLER_H
+
+#include <exception>
+
+struct SignalException : public std::exception {
+};
+
+
+class SignalHandler
+{
+ public:
+ ~SignalHandler ();
+ static SignalHandler& instance ();
+ bool start ();
+ void stop ();
+ void check ();
+ void trigger (bool notify);
+ bool active () const {return _active;}
+
+ protected:
+ SignalHandler () : _active(false) {}
+ static void callback (int signal);
+
+ private:
+ bool _active; ///< true if listening for signals
+ static bool _break; ///< true if signal has been caught
+};
+
+#endif