path: root/cpukit/rtems/include/rtems/rtems/tasksimpl.h

/**
 * @file
 *
 * @ingroup ClassicTasksImpl
 *
 * @brief Classic Tasks Manager Implementation
 */

/*  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.
 */

#ifndef _RTEMS_RTEMS_TASKSIMPL_H
#define _RTEMS_RTEMS_TASKSIMPL_H

#include <rtems/rtems/tasks.h>
#include <rtems/score/objectimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/threadimpl.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @defgroup ClassicTasksImpl Classic Tasks Manager Implementation
 *
 * @ingroup ClassicTasks
 *
 * @{
 */

/**
 *  The following instantiates the information control block used to
 *  manage this class of objects.
 */
extern Thread_Information _RTEMS_tasks_Information;

/**
 *  @brief RTEMS User Task Initialization
 *
 *  This routine creates and starts all configured user
 *  initialization threads.
 */
void _RTEMS_tasks_Initialize_user_tasks( void );

RTEMS_INLINE_ROUTINE Thread_Control *_RTEMS_tasks_Allocate(void)
{
  _Objects_Allocator_lock();

  _Thread_Kill_zombies();

  return (Thread_Control *)
    _Objects_Allocate_unprotected( &_RTEMS_tasks_Information.Objects );
}

/**
 *  @brief Frees a task control block.
 *
 *  This routine frees a task control block to the
 *  inactive chain of free task control blocks.
 */
RTEMS_INLINE_ROUTINE void _RTEMS_tasks_Free (
  Thread_Control *the_task
)
{
  _Objects_Free(
    _Objects_Get_information_id( the_task->Object.id ),
    &the_task->Object
  );
}

/**
 * @brief Converts the RTEMS API priority to the corresponding SuperCore
 * priority and validates it.
 *
 * The RTEMS API system priority is accepted as valid.
 *
 * @param[in] scheduler The scheduler instance.
 * @param[in] priority The RTEMS API priority to convert and validate.
 * @param[out] valid Indicates if the RTEMS API priority is valid and a
 *   corresponding SuperCore priority in the specified scheduler instance
 *   exists.
 *
 * @return The corresponding SuperCore priority.
 */
RTEMS_INLINE_ROUTINE Priority_Control _RTEMS_Priority_To_core(
  const Scheduler_Control *scheduler,
  rtems_task_priority      priority,
  bool                    *valid
)
{
  *valid = ( priority <= scheduler->maximum_priority );

  return _Scheduler_Map_priority( scheduler, (Priority_Control) priority );
}

/**
 * @brief Converts the SuperCore priority to the corresponding RTEMS API
 * priority.
 *
 * @param[in] scheduler The scheduler instance.
 * @param[in] priority The SuperCore priority to convert.
 *
 * @return The corresponding RTEMS API priority.
 */
RTEMS_INLINE_ROUTINE rtems_task_priority _RTEMS_Priority_From_core(
  const Scheduler_Control *scheduler,
  Priority_Control         priority
)
{
  return (rtems_task_priority)
    _Scheduler_Unmap_priority( scheduler, priority );
}

/**@}*/

#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/rtems/taskmp.h>
#endif

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */