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/**
* @file
*
* @ingroup ClassicRateMonImpl
*
* @brief Classic Rate Monotonic Scheduler Implementation
*/
/* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
* Copyright (c) 2016 embedded brains GmbH.
* COPYRIGHT (c) 2016 Kuan-Hsun Chen.
*
* 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_RATEMONIMPL_H
#define _RTEMS_RTEMS_RATEMONIMPL_H
#include <rtems/rtems/ratemondata.h>
#include <rtems/score/objectimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/watchdogimpl.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup ClassicRateMonImpl Classic Rate Monotonic Scheduler Implementation
*
* @ingroup RTEMSInternalClassic
*
* @{
*/
#define RATE_MONOTONIC_INTEND_TO_BLOCK \
( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_INTEND_TO_BLOCK )
#define RATE_MONOTONIC_BLOCKED \
( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_BLOCKED )
#define RATE_MONOTONIC_READY_AGAIN \
( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_READY_AGAIN )
/**
* @brief Allocates a period control block from
* the inactive chain of free period control blocks.
*
* This function allocates a period control block from
* the inactive chain of free period control blocks.
*/
RTEMS_INLINE_ROUTINE Rate_monotonic_Control *_Rate_monotonic_Allocate( void )
{
return (Rate_monotonic_Control *)
_Objects_Allocate( &_Rate_monotonic_Information );
}
RTEMS_INLINE_ROUTINE void _Rate_monotonic_Acquire_critical(
Rate_monotonic_Control *the_period,
ISR_lock_Context *lock_context
)
{
_ISR_lock_Acquire( &the_period->Lock, lock_context );
}
RTEMS_INLINE_ROUTINE void _Rate_monotonic_Release(
Rate_monotonic_Control *the_period,
ISR_lock_Context *lock_context
)
{
_ISR_lock_Release_and_ISR_enable( &the_period->Lock, lock_context );
}
RTEMS_INLINE_ROUTINE Rate_monotonic_Control *_Rate_monotonic_Get(
Objects_Id id,
ISR_lock_Context *lock_context
)
{
return (Rate_monotonic_Control *)
_Objects_Get( id, lock_context, &_Rate_monotonic_Information );
}
void _Rate_monotonic_Timeout( Watchdog_Control *watchdog );
/**
* @brief _Rate_monotonic_Get_status(
*
* This routine is invoked to compute the elapsed wall time and cpu
* time for a period.
*
* @param[in] the_period points to the period being operated upon.
* @param[out] wall_since_last_period is set to the wall time elapsed
* since the period was initiated.
* @param[out] cpu_since_last_period is set to the cpu time used by the
* owning thread since the period was initiated.
*
* @retval This routine returns true if the status can be determined
* and false otherwise.
*/
bool _Rate_monotonic_Get_status(
const Rate_monotonic_Control *the_period,
Timestamp_Control *wall_since_last_period,
Timestamp_Control *cpu_since_last_period
);
void _Rate_monotonic_Restart(
Rate_monotonic_Control *the_period,
Thread_Control *owner,
ISR_lock_Context *lock_context
);
void _Rate_monotonic_Cancel(
Rate_monotonic_Control *the_period,
Thread_Control *owner,
ISR_lock_Context *lock_context
);
RTEMS_INLINE_ROUTINE void _Rate_monotonic_Reset_min_time(
Timestamp_Control *min_time
)
{
_Timestamp_Set( min_time, 0x7fffffff, 0x7fffffff );
}
RTEMS_INLINE_ROUTINE void _Rate_monotonic_Reset_statistics(
Rate_monotonic_Control *the_period
)
{
Rate_monotonic_Statistics *statistics;
statistics = &the_period->Statistics;
memset( statistics, 0, sizeof( *statistics ) );
_Rate_monotonic_Reset_min_time( &statistics->min_wall_time );
_Rate_monotonic_Reset_min_time( &statistics->min_cpu_time );
}
/**@}*/
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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