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/*

 *  16.1.3 Wait for Thread Termination, P1003.1c/Draft 10, p. 147

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

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

 */

#include <pthread.h>

#include <errno.h>

#include <rtems/system.h>

#include <rtems/score/thread.h>

#include <rtems/posix/pthread.h>

int pthread_join(

  pthread_t   thread,

  void      **value_ptr

)

{

  register Thread_Control *the_thread;

  POSIX_API_Control       *api;

  Objects_Locations        location;

  void                    *return_pointer;

  the_thread = _POSIX_Threads_Get( thread, &location );

  switch ( location ) {

    case OBJECTS_ERROR:

    case OBJECTS_REMOTE:

      return ESRCH;

    case OBJECTS_LOCAL:

      api = the_thread->API_Extensions[ THREAD_API_POSIX ];

      if ( api->detachstate == PTHREAD_CREATE_DETACHED ) {

        _Thread_Enable_dispatch();

        return EINVAL;

      }

      if ( _Thread_Is_executing( the_thread ) ) {

        _Thread_Enable_dispatch();

        return EDEADLK;

      }

      /*

       *  Put ourself on the threads join list

       */

      _Thread_Executing->Wait.return_argument = (unsigned32 *) &return_pointer;

      _Thread_queue_Enter_critical_section( &api->Join_List );

      _Thread_queue_Enqueue( &api->Join_List, WATCHDOG_NO_TIMEOUT );

      _Thread_Enable_dispatch();

      if ( value_ptr )

        *value_ptr = return_pointer;

      return 0;

  }

  return POSIX_BOTTOM_REACHED();

}