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/**
* @file
*
* @brief Suspends Execution of Calling Thread until Target Thread Terminates
* @ingroup POSIXAPI
*/
/*
* 16.1.3 Wait for Thread Termination, P1003.1c/Draft 10, p. 147
*
* COPYRIGHT (c) 1989-2014.
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/pthreadimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/threadqimpl.h>
#include <rtems/score/statesimpl.h>
int pthread_join(
pthread_t thread,
void **value_ptr
)
{
Thread_Control *the_thread;
POSIX_API_Control *api;
Objects_Locations location;
void *return_pointer;
Thread_Control *executing;
on_EINTR:
the_thread = _Thread_Get( thread, &location );
switch ( location ) {
case OBJECTS_LOCAL:
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( api->detachstate == PTHREAD_CREATE_DETACHED ) {
_Objects_Put( &the_thread->Object );
return EINVAL;
}
executing = _Thread_Executing;
if ( executing == the_thread ) {
_Objects_Put( &the_thread->Object );
return EDEADLK;
}
/*
* Put ourself on the threads join list
*/
if ( the_thread->current_state == STATES_WAITING_FOR_JOIN_AT_EXIT ) {
return_pointer = the_thread->Wait.return_argument;
_Thread_Clear_state( the_thread, STATES_WAITING_FOR_JOIN_AT_EXIT );
} else {
executing->Wait.return_argument = &return_pointer;
_Thread_queue_Enqueue(
&api->Join_List,
executing,
STATES_WAITING_FOR_JOIN | STATES_INTERRUPTIBLE_BY_SIGNAL,
WATCHDOG_NO_TIMEOUT
);
}
_Objects_Put( &the_thread->Object );
if ( executing->Wait.return_code == EINTR )
goto on_EINTR;
if ( value_ptr )
*value_ptr = return_pointer;
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return ESRCH;
}
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