src/events/SDL_events_c.h
author Sam Lantinga <slouken@libsdl.org>
Sun, 21 Aug 2005 06:18:54 +0000
changeset 1123 28ac87a38c17
parent 769 b8d311d90021
child 1312 c9b51268668f
permissions -rw-r--r--
Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
From: Jiri Svoboda
Subject: [SDL] signal handling bug

I encountered the following bug:
SDL doesn't reset signal handlers for SIGTERM and SIGINT, after calling SDL_Quit these remain hooked to the handler in SDL_quit.c, being translated into SDL_QUIT events.

Consequently an application that issues a SDL_Quit and remains running will ignore any SIGTERM or SIGINT., and specifically CTRL-C presses.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2004 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 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     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 #ifdef SAVE_RCSID
    24 static char rcsid =
    25  "@(#) $Id$";
    26 #endif
    27 
    28 /* Useful functions and variables from SDL_events.c */
    29 #include "SDL_events.h"
    30 
    31 /* Start and stop the event processing loop */
    32 extern int SDL_StartEventLoop(Uint32 flags);
    33 extern void SDL_StopEventLoop(void);
    34 extern void SDL_QuitInterrupt(void);
    35 
    36 extern void SDL_Lock_EventThread();
    37 extern void SDL_Unlock_EventThread();
    38 extern Uint32 SDL_EventThreadID(void);
    39 
    40 /* Event handler init routines */
    41 extern int  SDL_AppActiveInit(void);
    42 extern int  SDL_KeyboardInit(void);
    43 extern int  SDL_MouseInit(void);
    44 extern int  SDL_QuitInit(void);
    45 
    46 /* Event handler quit routines */
    47 extern void SDL_AppActiveQuit(void);
    48 extern void SDL_KeyboardQuit(void);
    49 extern void SDL_MouseQuit(void);
    50 extern void SDL_QuitQuit(void);
    51 
    52 /* The event filter function */
    53 extern SDL_EventFilter SDL_EventOK;
    54 
    55 /* The array of event processing states */
    56 extern Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
    57 
    58 /* Internal event queueing functions
    59    (from SDL_active.c, SDL_mouse.c, SDL_keyboard.c, SDL_quit.c, SDL_events.c)
    60  */
    61 extern int SDL_PrivateAppActive(Uint8 gain, Uint8 state);
    62 extern int SDL_PrivateMouseMotion(Uint8 buttonstate, int relative,
    63 						Sint16 x, Sint16 y);
    64 extern int SDL_PrivateMouseButton(Uint8 state, Uint8 button,Sint16 x,Sint16 y);
    65 extern int SDL_PrivateKeyboard(Uint8 state, SDL_keysym *key);
    66 extern int SDL_PrivateResize(int w, int h);
    67 extern int SDL_PrivateExpose(void);
    68 extern int SDL_PrivateQuit(void);
    69 extern int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message);
    70 
    71 /* Used by the activity event handler to remove mouse focus */
    72 extern void SDL_ResetMouse(void);
    73 
    74 /* Used by the activity event handler to remove keyboard focus */
    75 extern void SDL_ResetKeyboard(void);
    76 
    77 /* Used by the event loop to queue pending keyboard repeat events */
    78 extern void SDL_CheckKeyRepeat(void);
    79 
    80 /* Used by the OS keyboard code to detect whether or not to do UNICODE */
    81 #ifndef DEFAULT_UNICODE_TRANSLATION
    82 #define DEFAULT_UNICODE_TRANSLATION 0	/* Default off because of overhead */
    83 #endif
    84 extern int SDL_TranslateUNICODE;