Exemplo n.º 1
0
void
osi_linux_mask(void)
{
    SIG_LOCK(current);
    sigfillset(&current->blocked);
    RECALC_SIGPENDING(current);
    SIG_UNLOCK(current);
}
Exemplo n.º 2
0
/* afs_osi_Sleep -- waits for an event to be notified, ignoring signals.
 * - NOTE: that on Linux, there are circumstances in which TASK_INTERRUPTIBLE
 *   can wake up, even if all signals are blocked
 * - TODO: handle signals correctly by passing an indication back to the
 *   caller that the wait has been interrupted and the stack should be cleaned
 *   up preparatory to signal delivery
 */
void
afs_osi_Sleep(void *event)
{
    sigset_t saved_set;

    SIG_LOCK(current);
    saved_set = current->blocked;
    sigfillset(&current->blocked);
    RECALC_SIGPENDING(current);
    SIG_UNLOCK(current);

    afs_osi_SleepSig(event);

    SIG_LOCK(current);
    current->blocked = saved_set;
    RECALC_SIGPENDING(current);
    SIG_UNLOCK(current);
}
Exemplo n.º 3
0
/* CV_WAIT and CV_TIMEDWAIT sleep until the specified event occurs, or, in the
 * case of CV_TIMEDWAIT, until the specified timeout occurs.
 * - NOTE: that on Linux, there are circumstances in which TASK_INTERRUPTIBLE
 *   can wake up, even if all signals are blocked
 * - TODO: handle signals correctly by passing an indication back to the
 *   caller that the wait has been interrupted and the stack should be cleaned
 *   up preparatory to signal delivery
 */
int
afs_cv_wait(afs_kcondvar_t * cv, afs_kmutex_t * l, int sigok)
{
    int seq, isAFSGlocked = ISAFS_GLOCK();
    sigset_t saved_set;
#ifdef DECLARE_WAITQUEUE
    DECLARE_WAITQUEUE(wait, current);
#else
    struct wait_queue wait = { current, NULL };
#endif
    sigemptyset(&saved_set);
    seq = cv->seq;
    
    set_current_state(TASK_INTERRUPTIBLE);
    add_wait_queue(&cv->waitq, &wait);

    if (isAFSGlocked)
	AFS_GUNLOCK();
    MUTEX_EXIT(l);

    if (!sigok) {
	SIG_LOCK(current);
	saved_set = current->blocked;
	sigfillset(&current->blocked);
	RECALC_SIGPENDING(current);
	SIG_UNLOCK(current);
    }

    while(seq == cv->seq) {
	schedule();
#ifdef AFS_LINUX26_ENV
#ifdef CONFIG_PM
	if (
#ifdef PF_FREEZE
	    current->flags & PF_FREEZE
#else
#if defined(STRUCT_TASK_STRUCT_HAS_TODO)
	    !current->todo
#else
#if defined(STRUCT_TASK_STRUCT_HAS_THREAD_INFO)
	    test_ti_thread_flag(current->thread_info, TIF_FREEZE)
#else
	    test_ti_thread_flag(task_thread_info(current), TIF_FREEZE)
#endif
#endif
#endif
	    )
#ifdef LINUX_REFRIGERATOR_TAKES_PF_FREEZE
	    refrigerator(PF_FREEZE);
#else
	    refrigerator();
#endif
	    set_current_state(TASK_INTERRUPTIBLE);
#endif
#endif
    }

    remove_wait_queue(&cv->waitq, &wait);
    set_current_state(TASK_RUNNING);

    if (!sigok) {
	SIG_LOCK(current);
	current->blocked = saved_set;
	RECALC_SIGPENDING(current);
	SIG_UNLOCK(current);
    }

    if (isAFSGlocked)
	AFS_GLOCK();
    MUTEX_ENTER(l);

    return (sigok && signal_pending(current)) ? EINTR : 0;
}