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/**
* @file
*
* @brief Simple SMP Scheduler API
*
* @ingroup ScoreSchedulerSMP
*/
/*
* Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
*
* Copyright (c) 2013 embedded brains GmbH.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifndef _RTEMS_SCORE_SCHEDULERSIMPLE_SMP_H
#define _RTEMS_SCORE_SCHEDULERSIMPLE_SMP_H
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/score/scheduler.h>
#include <rtems/score/schedulerpriority.h>
/**
* @defgroup ScoreSchedulerSMP Simple SMP Scheduler
*
* @ingroup ScoreScheduler
*
* The Simple SMP Scheduler allocates a processor for the processor count
* highest priority ready threads. The thread priority and position in the
* ready chain are the only information to determine the scheduling decision.
* Threads with an allocated processor are in the scheduled chain. After
* initialization the scheduled chain has exactly processor count nodes. Each
* processor has exactly one allocated thread after initialization. All
* enqueue and extract operations may exchange threads with the scheduled
* chain. One thread will be added and another will be removed. The scheduled
* and ready chain is ordered according to the thread priority order. The
* chain insert operations are O(count of ready threads), thus this scheduler
* is unsuitable for most real-time applications.
*
* The thread preempt mode will be ignored.
*
* @{
*/
typedef struct {
Chain_Control ready;
Chain_Control scheduled;
} Scheduler_simple_smp_Control;
/**
* @brief Entry points for the Simple SMP Scheduler.
*/
#define SCHEDULER_SIMPLE_SMP_ENTRY_POINTS \
{ \
_Scheduler_simple_smp_Initialize, \
_Scheduler_simple_smp_Schedule, \
_Scheduler_simple_smp_Yield, \
_Scheduler_simple_smp_Extract, \
_Scheduler_simple_smp_Enqueue_priority_fifo, \
_Scheduler_default_Allocate, \
_Scheduler_default_Free, \
_Scheduler_default_Update, \
_Scheduler_simple_smp_Enqueue_priority_fifo, \
_Scheduler_simple_smp_Enqueue_priority_lifo, \
_Scheduler_simple_smp_Extract, \
_Scheduler_priority_Priority_compare, \
_Scheduler_default_Release_job, \
_Scheduler_default_Tick, \
_Scheduler_simple_smp_Start_idle \
}
void _Scheduler_simple_smp_Initialize( void );
void _Scheduler_simple_smp_Enqueue_priority_fifo( Thread_Control *thread );
void _Scheduler_simple_smp_Enqueue_priority_lifo( Thread_Control *thread );
void _Scheduler_simple_smp_Extract( Thread_Control *thread );
void _Scheduler_simple_smp_Yield( Thread_Control *thread );
void _Scheduler_simple_smp_Schedule( void );
void _Scheduler_simple_smp_Start_idle(
Thread_Control *thread,
Per_CPU_Control *cpu
);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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