SDL_quit.c File Reference

#include "../SDL_internal.h"
#include "SDL_hints.h"
#include "SDL_assert.h"
#include "SDL_events.h"
#include "SDL_events_c.h"

Include dependency graph for SDL_quit.c:

Go to the source code of this file.

Functions
static void	SDL_HandleSIG (int sig)
static int	SDL_QuitInit_Internal (void)
int	SDL_QuitInit (void)
static void	SDL_QuitQuit_Internal (void)
void	SDL_QuitQuit (void)
int	SDL_SendQuit (void)
void	SDL_SendPendingQuit (void)

Variables
static SDL_bool	disable_signals = SDL_FALSE
static SDL_bool	send_quit_pending = SDL_FALSE

Function Documentation

static void SDL_HandleSIG ( int  sig )

static

Definition at line 39 of file SDL_quit.c.

References SDL_TRUE, and send_quit_pending.

Referenced by SDL_QuitInit_Internal(), and SDL_QuitQuit_Internal().

{
    /* Reset the signal handler */
    signal(sig, SDL_HandleSIG);

    /* Send a quit event next time the event loop pumps. */
    /* We can't send it in signal handler; malloc() might be interrupted! */
    send_quit_pending = SDL_TRUE;
}

int SDL_QuitInit

(

void

)

Definition at line 92 of file SDL_quit.c.

References SDL_FALSE, SDL_GetHintBoolean, SDL_HINT_NO_SIGNAL_HANDLERS, and SDL_QuitInit_Internal().

Referenced by SDL_InitSubSystem().

{
    if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
        return SDL_QuitInit_Internal();
    }
    return 0;
}

static int SDL_QuitInit_Internal ( void  )

static

Definition at line 52 of file SDL_quit.c.

References NULL, SDL_HandleSIG(), and void.

Referenced by SDL_QuitInit().

{
#ifdef HAVE_SIGACTION
    struct sigaction action;
    sigaction(SIGINT, NULL, &action);
#ifdef HAVE_SA_SIGACTION
    if ( action.sa_handler == SIG_DFL && (void (*)(int))action.sa_sigaction == SIG_DFL ) {
#else
    if ( action.sa_handler == SIG_DFL ) {
#endif
        action.sa_handler = SDL_HandleSIG;
        sigaction(SIGINT, &action, NULL);
    }
    sigaction(SIGTERM, NULL, &action);

#ifdef HAVE_SA_SIGACTION
    if ( action.sa_handler == SIG_DFL && (void (*)(int))action.sa_sigaction == SIG_DFL ) {
#else
    if ( action.sa_handler == SIG_DFL ) {
#endif
        action.sa_handler = SDL_HandleSIG;
        sigaction(SIGTERM, &action, NULL);
    }
#elif HAVE_SIGNAL_H
    void (*ohandler) (int);

    /* Both SIGINT and SIGTERM are translated into quit interrupts */
    ohandler = signal(SIGINT, SDL_HandleSIG);
    if (ohandler != SIG_DFL)
        signal(SIGINT, ohandler);
    ohandler = signal(SIGTERM, SDL_HandleSIG);
    if (ohandler != SIG_DFL)
        signal(SIGTERM, ohandler);
#endif /* HAVE_SIGNAL_H */

    /* That's it! */
    return 0;
}

void SDL_QuitQuit

(

void

)

Definition at line 128 of file SDL_quit.c.

References disable_signals, and SDL_QuitQuit_Internal().

Referenced by SDL_QuitSubSystem().

{
    if (!disable_signals) {
        SDL_QuitQuit_Internal();
    }
}

static void SDL_QuitQuit_Internal ( void  )

static

Definition at line 101 of file SDL_quit.c.

References NULL, SDL_HandleSIG(), and void.

Referenced by SDL_QuitQuit().

{
#ifdef HAVE_SIGACTION
    struct sigaction action;
    sigaction(SIGINT, NULL, &action);
    if ( action.sa_handler == SDL_HandleSIG ) {
        action.sa_handler = SIG_DFL;
        sigaction(SIGINT, &action, NULL);
    }
    sigaction(SIGTERM, NULL, &action);
    if ( action.sa_handler == SDL_HandleSIG ) {
        action.sa_handler = SIG_DFL;
        sigaction(SIGTERM, &action, NULL);
    }
#elif HAVE_SIGNAL_H
    void (*ohandler) (int);

    ohandler = signal(SIGINT, SIG_DFL);
    if (ohandler != SDL_HandleSIG)
        signal(SIGINT, ohandler);
    ohandler = signal(SIGTERM, SIG_DFL);
    if (ohandler != SDL_HandleSIG)
        signal(SIGTERM, ohandler);
#endif /* HAVE_SIGNAL_H */
}

void SDL_SendPendingQuit

(

void

)

Definition at line 144 of file SDL_quit.c.

References SDL_assert, SDL_SendQuit(), and send_quit_pending.

Referenced by SDL_PumpEvents().

{
    if (send_quit_pending) {
        SDL_SendQuit();
        SDL_assert(!send_quit_pending);
    }
}

int SDL_SendQuit

(

void

)

Definition at line 137 of file SDL_quit.c.

References SDL_FALSE, SDL_QUIT, SDL_SendAppEvent(), and send_quit_pending.

Referenced by SDL_SendPendingQuit(), and SDL_SendWindowEvent().

{
    send_quit_pending = SDL_FALSE;
    return SDL_SendAppEvent(SDL_QUIT);
}

Variable Documentation

SDL_bool disable_signals = SDL_FALSE

static

Definition at line 34 of file SDL_quit.c.

Referenced by SDL_QuitQuit().

SDL_bool send_quit_pending = SDL_FALSE

static

Definition at line 35 of file SDL_quit.c.

Referenced by SDL_HandleSIG(), SDL_SendPendingQuit(), and SDL_SendQuit().