00001 /* 00002 * This program is free software; you can redistribute it and/or modify 00003 * it under the terms of the GNU General Public License as published by 00004 * the Free Software Foundation; either version 3 of the License, or 00005 * (at your option) any later version. 00006 * 00007 * Written (W) 1999-2008 Soeren Sonnenburg 00008 * Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #ifndef __SIGNAL__H_ 00012 #define __SIGNAL__H_ 00013 00014 #include "lib/config.h" 00015 #include "base/SGObject.h" 00016 00017 #ifndef WIN32 00018 #include <signal.h> 00019 #define NUMTRAPPEDSIGS 2 00020 00021 #include "lib/python.h" 00022 00024 class CSignal : public CSGObject 00025 { 00026 public: 00028 CSignal(); 00029 ~CSignal(); 00030 00035 static void handler(int signal); 00036 00041 static bool set_handler(); 00042 00047 static bool unset_handler(); 00048 00050 static void clear(); 00051 00056 static inline bool cancel_computations() 00057 { 00058 #ifdef HAVE_PYTHON 00059 if (PyErr_CheckSignals()) 00060 { 00061 SG_SPRINT("\nImmediately return to matlab prompt / Prematurely finish computations / Do nothing (I/P/D)? "); 00062 char answer=fgetc(stdin); 00063 00064 if (answer == 'I') 00065 SG_SERROR("shogun stopped by SIGINT\n"); 00066 else if (answer == 'P') 00067 { 00068 PyErr_Clear(); 00069 cancel_computation=true; 00070 } 00071 else 00072 SG_SPRINT("\n"); 00073 } 00074 #endif 00075 return cancel_computation; 00076 } 00077 00078 protected: 00080 static int signals[NUMTRAPPEDSIGS]; 00081 00083 static struct sigaction oldsigaction[NUMTRAPPEDSIGS]; 00084 00086 static bool active; 00087 00089 static bool cancel_computation; 00090 }; 00091 #endif // WIN32 00092 #endif // __SIGNAL__H_