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/**
* @file
*
* @brief POSIX Thread Exit Shared Helper
* @ingroup POSIX_THREAD Thread API Extension
*/
/*
* COPYRIGHT (c) 1989-2011.
* 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 <rtems/posix/pthreadimpl.h>
#include <rtems/score/apimutex.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/threadqimpl.h>
void _POSIX_Thread_Exit(
Thread_Control *the_thread,
void *value_ptr
)
{
Objects_Information *the_information;
Thread_Control *unblocked;
POSIX_API_Control *api;
the_information = _Objects_Get_information_id( the_thread->Object.id );
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
/*
* The_information has to be non-NULL. Otherwise, we couldn't be
* running in a thread of this API and class.
*
* NOTE: Lock and unlock in different order so we do not throw a
* fatal error when locking the allocator mutex. And after
* we unlock, we want to defer the context switch until we
* are ready to be switched out. Otherwise, an ISR could
* occur and preempt us out while we still hold the
* allocator mutex.
*/
_RTEMS_Lock_allocator();
_Thread_Disable_dispatch();
the_thread->Wait.return_argument = value_ptr;
/*
* Process join
*/
if ( api->detachstate == PTHREAD_CREATE_JOINABLE ) {
unblocked = _Thread_queue_Dequeue( &api->Join_List );
if ( unblocked ) {
do {
*(void **)unblocked->Wait.return_argument = value_ptr;
} while ( (unblocked = _Thread_queue_Dequeue( &api->Join_List )) );
} else {
_Thread_Set_state(
the_thread,
STATES_WAITING_FOR_JOIN_AT_EXIT | STATES_TRANSIENT
);
/* FIXME: Lock order reversal */
_RTEMS_Unlock_allocator();
_Thread_Enable_dispatch();
/* now waiting for thread to arrive */
_RTEMS_Lock_allocator();
_Thread_Disable_dispatch();
}
}
/*
* Now shut down the thread
*/
_Thread_Close( the_information, the_thread );
_POSIX_Threads_Free( the_thread );
/* FIXME: Lock order reversal */
_RTEMS_Unlock_allocator();
_Thread_Enable_dispatch();
}
void pthread_exit(
void *value_ptr
)
{
_POSIX_Thread_Exit( _Thread_Get_executing(), value_ptr );
}
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