1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 /* General quit handling code for SDL */ 25 26 #ifdef HAVE_SIGNAL_H 27 #include <signal.h> 28 #endif 29 30 #include "SDL_events.h" 31 #include "SDL_events_c.h" 32 33 34 #ifdef HAVE_SIGNAL_H 35 static void SDL_HandleSIG(int sig) 36 { 37 /* Reset the signal handler */ 38 signal(sig, SDL_HandleSIG); 39 40 /* Signal a quit interrupt */ 41 SDL_PrivateQuit(); 42 } 43 #endif /* HAVE_SIGNAL_H */ 44 45 /* Public functions */ 46 int SDL_QuitInit(void) 47 { 48 #ifdef HAVE_SIGNAL_H 49 void (*ohandler)(int); 50 51 /* Both SIGINT and SIGTERM are translated into quit interrupts */ 52 ohandler = signal(SIGINT, SDL_HandleSIG); 53 if ( ohandler != SIG_DFL ) 54 signal(SIGINT, ohandler); 55 ohandler = signal(SIGTERM, SDL_HandleSIG); 56 if ( ohandler != SIG_DFL ) 57 signal(SIGTERM, ohandler); 58 #endif /* HAVE_SIGNAL_H */ 59 60 /* That's it! */ 61 return(0); 62 } 63 void SDL_QuitQuit(void) 64 { 65 #ifdef HAVE_SIGNAL_H 66 void (*ohandler)(int); 67 68 ohandler = signal(SIGINT, SIG_DFL); 69 if ( ohandler != SDL_HandleSIG ) 70 signal(SIGINT, ohandler); 71 ohandler = signal(SIGTERM, SIG_DFL); 72 if ( ohandler != SDL_HandleSIG ) 73 signal(SIGTERM, ohandler); 74 #endif /* HAVE_SIGNAL_H */ 75 } 76 77 /* This function returns 1 if it's okay to close the application window */ 78 int SDL_PrivateQuit(void) 79 { 80 int posted; 81 82 posted = 0; 83 if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) { 84 SDL_Event event; 85 event.type = SDL_QUIT; 86 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { 87 posted = 1; 88 SDL_PushEvent(&event); 89 } 90 } 91 return(posted); 92 } 93
