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/**
* @file
*
* @brief Thread Queue Enqueue Priority
* @ingroup ScoreThreadQ
*/
/*
* 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 <rtems/score/threadqimpl.h>
#include <rtems/score/isrlevel.h>
#include <rtems/score/statesimpl.h>
Thread_blocking_operation_States _Thread_queue_Enqueue_priority (
Thread_queue_Control *the_thread_queue,
Thread_Control *the_thread,
ISR_Level *level_p
)
{
Thread_blocking_operation_States sync_state;
ISR_Level level;
_ISR_Disable( level );
sync_state = the_thread_queue->sync_state;
the_thread_queue->sync_state = THREAD_BLOCKING_OPERATION_SYNCHRONIZED;
if (sync_state == THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED) {
_RBTree_Insert(
&the_thread_queue->Queues.Priority,
&the_thread->RBNode,
_Thread_queue_Compare_priority,
false
);
the_thread->Wait.queue = the_thread_queue;
the_thread_queue->sync_state = THREAD_BLOCKING_OPERATION_SYNCHRONIZED;
_ISR_Enable( level );
return THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED;
}
/*
* An interrupt completed the thread's blocking request.
* For example, the blocking thread could have been given
* the mutex by an ISR or timed out.
*
* WARNING! Returning with interrupts disabled!
*/
*level_p = level;
return sync_state;
}
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