source: rtems/cpukit/score/src/threadq.c

/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup RTEMSScoreThreadQueue
 *
 * @brief This source file contains static assertions related to the Thread
 *   Queue Handler, the definition of ::_Thread_queue_Object_name, and the
 *   implementation of _Thread_queue_Acquire(),
 *   _Thread_queue_Do_acquire_critical(), _Thread_queue_Initialize(),
 *   _Thread_queue_MP_callout_do_nothing(), _Thread_queue_Object_initialize(),
 *   _Thread_queue_Queue_get_name_and_id(), _Thread_queue_Release(), and
 *   _Thread_queue_Release_critical().
 */

/*
 *  COPYRIGHT (c) 1989-2014.
 *  On-Line Applications Research Corporation (OAR).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/score/threadqimpl.h>

RTEMS_STATIC_ASSERT(
#if defined(RTEMS_SMP)
  offsetof( Thread_queue_Syslock_queue, Queue.Lock.next_ticket )
#else
  offsetof( Thread_queue_Syslock_queue, reserved[ 0 ] )
#endif
    == offsetof( struct _Thread_queue_Queue, _Lock._next_ticket ),
  THREAD_QUEUE_SYSLOCK_QUEUE_NEXT_TICKET
);

RTEMS_STATIC_ASSERT(
#if defined(RTEMS_SMP)
  offsetof( Thread_queue_Syslock_queue, Queue.Lock.now_serving )
#else
  offsetof( Thread_queue_Syslock_queue, reserved[ 1 ] )
#endif
    == offsetof( struct _Thread_queue_Queue, _Lock._now_serving ),
  THREAD_QUEUE_SYSLOCK_QUEUE_NOW_SERVING
);

RTEMS_STATIC_ASSERT(
  offsetof( Thread_queue_Syslock_queue, Queue.heads )
    == offsetof( struct _Thread_queue_Queue, _heads ),
  THREAD_QUEUE_SYSLOCK_QUEUE_HEADS
);

RTEMS_STATIC_ASSERT(
  offsetof( Thread_queue_Syslock_queue, Queue.owner )
    == offsetof( struct _Thread_queue_Queue, _owner ),
  THREAD_QUEUE_SYSLOCK_QUEUE_OWNER
);

RTEMS_STATIC_ASSERT(
  offsetof( Thread_queue_Syslock_queue, Queue.name )
    == offsetof( struct _Thread_queue_Queue, _name ),
  THREAD_QUEUE_SYSLOCK_QUEUE_NAME
);

RTEMS_STATIC_ASSERT(
  sizeof( Thread_queue_Syslock_queue )
    == sizeof( struct _Thread_queue_Queue ),
  THREAD_QUEUE_SYSLOCK_QUEUE_SIZE
);

#if defined(RTEMS_SMP)
void _Thread_queue_Do_acquire_critical(
  Thread_queue_Control *the_thread_queue,
  ISR_lock_Context     *lock_context
)
{
  _Thread_queue_Queue_acquire_critical(
    &the_thread_queue->Queue,
    &the_thread_queue->Lock_stats,
    lock_context
  );
#if defined(RTEMS_DEBUG)
  the_thread_queue->owner = _SMP_lock_Who_am_I();
#endif
}

void _Thread_queue_Acquire(
  Thread_queue_Control *the_thread_queue,
  Thread_queue_Context *queue_context
)
{
  _ISR_lock_ISR_disable( &queue_context->Lock_context.Lock_context );
  _Thread_queue_Queue_acquire_critical(
    &the_thread_queue->Queue,
    &the_thread_queue->Lock_stats,
    &queue_context->Lock_context.Lock_context
  );
#if defined(RTEMS_DEBUG)
  the_thread_queue->owner = _SMP_lock_Who_am_I();
#endif
}

void _Thread_queue_Do_release_critical(
  Thread_queue_Control *the_thread_queue,
  ISR_lock_Context     *lock_context
)
{
#if defined(RTEMS_DEBUG)
  _Assert( _Thread_queue_Is_lock_owner( the_thread_queue ) );
  the_thread_queue->owner = SMP_LOCK_NO_OWNER;
#endif
  _Thread_queue_Queue_release_critical(
    &the_thread_queue->Queue,
    lock_context
  );
}

void _Thread_queue_Release(
  Thread_queue_Control *the_thread_queue,
  Thread_queue_Context *queue_context
)
{
#if defined(RTEMS_DEBUG)
  _Assert( _Thread_queue_Is_lock_owner( the_thread_queue ) );
  the_thread_queue->owner = SMP_LOCK_NO_OWNER;
#endif
  _Thread_queue_Queue_release_critical(
    &the_thread_queue->Queue,
    &queue_context->Lock_context.Lock_context
  );
  _ISR_lock_ISR_enable( &queue_context->Lock_context.Lock_context );
}
#endif

const char _Thread_queue_Object_name[] = { '\0' };

void _Thread_queue_Initialize(
  Thread_queue_Control *the_thread_queue,
  const char           *name
)
{
  _Thread_queue_Queue_initialize( &the_thread_queue->Queue, name );
#if defined(RTEMS_SMP)
  _SMP_lock_Stats_initialize( &the_thread_queue->Lock_stats, "Thread Queue" );
#endif
}

void _Thread_queue_Object_initialize( Thread_queue_Control *the_thread_queue )
{
  _Thread_queue_Initialize( the_thread_queue, _Thread_queue_Object_name );
}

#if defined(RTEMS_MULTIPROCESSING)
void _Thread_queue_MP_callout_do_nothing(
  Thread_Control *the_proxy,
  Objects_Id      mp_id
)
{
  /* Do nothing */
  (void) the_proxy;
  (void) mp_id;
}
#endif