src/events/SDL_quit.c
author Ryan C. Gordon
Wed, 29 Nov 2006 10:30:05 +0000
branchSDL-1.2
changeset 3900 ce3a2bd11305
parent 1402 d910939febfa
child 1662 782fd950bd46
child 1895 c121d94672cb
child 4159 a1b03ba2fcd0
permissions -rw-r--r--
Wrapped some macro params in parentheses for alloca wrappers.
Thansk, Suzuki Masahiro.
     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@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 }