annotate src/events/SDL_quit.c @ 1343:d5c4f8f6855e

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author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 17:46:19 +0000
parents 450721ad5436
children d910939febfa
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* General quit handling code for SDL */
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24
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25 #include "SDL_config.h"
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26
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27 #ifdef HAVE_SIGNAL_H
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28 #include <signal.h>
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29 #endif
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30
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31 #include "SDL_events.h"
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32 #include "SDL_events_c.h"
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33
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34
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35 #ifdef HAVE_SIGNAL_H
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36 static void SDL_HandleSIG(int sig)
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37 {
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38 /* Reset the signal handler */
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39 signal(sig, SDL_HandleSIG);
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40
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41 /* Signal a quit interrupt */
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42 SDL_PrivateQuit();
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43 }
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44 #endif /* HAVE_SIGNAL_H */
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45
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46 /* Public functions */
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47 int SDL_QuitInit(void)
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48 {
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49 #ifdef HAVE_SIGNAL_H
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50 void (*ohandler)(int);
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51
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52 /* Both SIGINT and SIGTERM are translated into quit interrupts */
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53 ohandler = signal(SIGINT, SDL_HandleSIG);
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54 if ( ohandler != SIG_DFL )
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55 signal(SIGINT, ohandler);
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56 ohandler = signal(SIGTERM, SDL_HandleSIG);
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57 if ( ohandler != SIG_DFL )
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58 signal(SIGTERM, ohandler);
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59 #endif /* HAVE_SIGNAL_H */
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60
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61 /* That's it! */
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62 return(0);
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63 }
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64 void SDL_QuitQuit(void)
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65 {
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66 #ifdef HAVE_SIGNAL_H
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67 void (*ohandler)(int);
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68
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69 ohandler = signal(SIGINT, SIG_DFL);
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70 if ( ohandler != SDL_HandleSIG )
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71 signal(SIGINT, ohandler);
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72 ohandler = signal(SIGTERM, SIG_DFL);
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73 if ( ohandler != SDL_HandleSIG )
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74 signal(SIGTERM, ohandler);
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75 #endif /* HAVE_SIGNAL_H */
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76 }
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77
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78 /* This function returns 1 if it's okay to close the application window */
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79 int SDL_PrivateQuit(void)
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80 {
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81 int posted;
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82
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83 posted = 0;
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84 if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) {
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85 SDL_Event event;
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86 event.type = SDL_QUIT;
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87 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
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88 posted = 1;
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89 SDL_PushEvent(&event);
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90 }
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91 }
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92 return(posted);
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93 }