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/*

 *  $Id: psignalunblockthread.c,v 1.2 2001-09-27 11:59:17 chris Exp $

 */

#include <assert.h>

#include <errno.h>

#include <pthread.h>

#include <signal.h>

#include <rtems/system.h>

#include <rtems/score/isr.h>

#include <rtems/score/thread.h>

#include <rtems/score/tqdata.h>

#include <rtems/score/wkspace.h>

#include <rtems/posix/seterr.h>

#include <rtems/posix/threadsup.h>

#include <rtems/posix/psignal.h>

#include <rtems/posix/pthread.h>

#include <rtems/posix/time.h>

#include <stdio.h>

/*PAGE

 *

 *  _POSIX_signals_Unblock_thread

 */

/* XXX this routine could probably be cleaned up */

boolean _POSIX_signals_Unblock_thread(

  Thread_Control  *the_thread,

  int              signo,

  siginfo_t       *info

)

{

  POSIX_API_Control  *api;

  sigset_t            mask;

  siginfo_t          *the_info = NULL;

  api = the_thread->API_Extensions[ THREAD_API_POSIX ];

  mask = signo_to_mask( signo );

  /*

   *  Is the thread is specifically waiting for a signal?

   */

  if ( _States_Is_interruptible_signal( the_thread->current_state ) ) {

    if ( (the_thread->Wait.option & mask) || (~api->signals_blocked & mask) ) {

      the_thread->Wait.return_code = EINTR;

      the_info = (siginfo_t *) the_thread->Wait.return_argument;

      if ( !info ) {

        the_info->si_signo = signo;

        the_info->si_code = SI_USER;

        the_info->si_value.sival_int = 0;

      } else {

        *the_info = *info;

      }

      _Thread_queue_Extract_with_proxy( the_thread );

      return TRUE;

    }

    /*

     *  This should only be reached via pthread_kill().

     */

    return FALSE;

  }

  if ( ~api->signals_blocked & mask ) {

    the_thread->do_post_task_switch_extension = TRUE;

    if ( the_thread->current_state & STATES_INTERRUPTIBLE_BY_SIGNAL ) {

      the_thread->Wait.return_code = EINTR;

      if ( _States_Is_waiting_on_thread_queue(the_thread->current_state) )

        _Thread_queue_Extract_with_proxy( the_thread );

      else if ( _States_Is_delaying(the_thread->current_state)){

        if ( _Watchdog_Is_active( &the_thread->Timer ) )

          (void) _Watchdog_Remove( &the_thread->Timer );

        _Thread_Unblock( the_thread );

      }

    }

  }

  return FALSE;

}