Exemplo n.º 1
0
void pthread_exit(void * retval)
{
  pthread_descr self = thread_self();
  pthread_descr joining;
  struct pthread_request request;

  /* Reset the cancellation flag to avoid looping if the cleanup handlers
     contain cancellation points */
  self->p_canceled = 0;
  /* Call cleanup functions and destroy the thread-specific data */
  __pthread_perform_cleanup();
  __pthread_destroy_specifics();
  /* Store return value */
  acquire(self->p_spinlock);
  self->p_retval = retval;
  /* Say that we've terminated */
  self->p_terminated = 1;
  /* See if someone is joining on us */
  joining = self->p_joining;
  release(self->p_spinlock);
  /* Restart joining thread if any */
  if (joining != NULL) restart(joining);
  /* If this is the initial thread, block until all threads have terminated.
     If another thread calls exit, we'll be terminated from our signal
     handler. */
  if (self == __pthread_main_thread && __pthread_manager_request >= 0) {
    request.req_thread = self;
    request.req_kind = REQ_MAIN_THREAD_EXIT;
    write(__pthread_manager_request, (char *)&request, sizeof(request));
    suspend(self);
  }
  /* Exit the process (but don't flush stdio streams, and don't run
     atexit functions). */
  _exit(0);
}
Exemplo n.º 2
0
void __pthread_do_exit(void *retval, char *currentframe)
{
  pthread_descr self = thread_self();
  pthread_descr joining;
  struct pthread_request request;
  PDEBUG("self=%p, pid=%d\n", self, self->p_pid);

  /* obey POSIX behavior and prevent cancellation functions from
   * being called more than once.
   * http://sourceware.org/ml/libc-ports/2006-10/msg00043.html
   */
  THREAD_SETMEM(self, p_cancelstate, PTHREAD_CANCEL_DISABLE);
  THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);

  /* Call cleanup functions and destroy the thread-specific data */
  __pthread_perform_cleanup(currentframe);
  __pthread_destroy_specifics();
  /* Store return value */
  __pthread_lock(THREAD_GETMEM(self, p_lock), self);
  THREAD_SETMEM(self, p_retval, retval);
  /* See whether we have to signal the death.  */
  if (THREAD_GETMEM(self, p_report_events))
    {
      /* See whether TD_DEATH is in any of the mask.  */
      int idx = __td_eventword (TD_DEATH);
      uint32_t mask = __td_eventmask (TD_DEATH);

      if ((mask & (__pthread_threads_events.event_bits[idx]
		   | THREAD_GETMEM_NC(self,
				   p_eventbuf.eventmask).event_bits[idx]))
	  != 0)
	{
	  /* Yep, we have to signal the death.  */
	  THREAD_SETMEM(self, p_eventbuf.eventnum, TD_DEATH);
	  THREAD_SETMEM(self, p_eventbuf.eventdata, self);
	  __pthread_last_event = self;

	  /* Now call the function to signal the event.  */
	  __linuxthreads_death_event();
	}
    }
  /* Say that we've terminated */
  THREAD_SETMEM(self, p_terminated, 1);
  /* See if someone is joining on us */
  joining = THREAD_GETMEM(self, p_joining);
  PDEBUG("joining = %p, pid=%d\n", joining, joining->p_pid);
  __pthread_unlock(THREAD_GETMEM(self, p_lock));
  /* Restart joining thread if any */
  if (joining != NULL) restart(joining);
  /* If this is the initial thread, block until all threads have terminated.
     If another thread calls exit, we'll be terminated from our signal
     handler. */
  if (self == __pthread_main_thread && __pthread_manager_request >= 0) {
    request.req_thread = self;
    request.req_kind = REQ_MAIN_THREAD_EXIT;
    TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request,
		(char *)&request, sizeof(request)));
    suspend(self);
    /* Main thread flushes stdio streams and runs atexit functions.
     * It also calls a handler within LinuxThreads which sends a process exit
     * request to the thread manager. */
    exit(0);
  }
  /* Exit the process (but don't flush stdio streams, and don't run
     atexit functions). */
  _exit(0);
}