| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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@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 | } |