int
_pthread_once(pthread_once_t *once_control, void (*init_routine) (void))
{
int wakeup = 0;
if (once_control->state == ONCE_DONE)
return (0);
_pthread_mutex_lock(&once_lock);
while (*(volatile int *)&(once_control->state) == ONCE_IN_PROGRESS)
_pthread_cond_wait(&once_cv, &once_lock);
/*
* If previous thread was canceled, then the state still
* could be ONCE_NEVER_DONE, we need to check it again.
*/
if (*(volatile int *)&(once_control->state) == ONCE_NEVER_DONE) {
once_control->state = ONCE_IN_PROGRESS;
_pthread_mutex_unlock(&once_lock);
_pthread_cleanup_push(once_cancel_handler, once_control);
init_routine();
_pthread_cleanup_pop(0);
_pthread_mutex_lock(&once_lock);
once_control->state = ONCE_DONE;
wakeup = 1;
}
_pthread_mutex_unlock(&once_lock);
if (wakeup)
_pthread_cond_broadcast(&once_cv);
return (0);
}
void
fn7 (void)
{
/* This is the old LinuxThreads pthread_cleanup_{push,pop}. */
struct _pthread_cleanup_buffer b;
_pthread_cleanup_push (&b, clh, (void *) 8l);
fn6 ();
_pthread_cleanup_pop (&b, 1);
}
static __attribute__((noinline)) void
fn3 (void)
{
/* This is the old LinuxThreads pthread_cleanup_{push,pop}. */
struct _pthread_cleanup_buffer b;
_pthread_cleanup_push (&b, clh, (void *) 4l);
fn0 ();
_pthread_cleanup_pop (&b, 1);
}
