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/**
* @file
*
* @brief Rate Monotonic Timeout
* @ingroup ClassicRateMon
*/
/*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* COPYRIGHT (c) 2016-2017 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/ratemonimpl.h>
static void _Rate_monotonic_Renew_deadline(
Rate_monotonic_Control *the_period,
ISR_lock_Context *lock_context
)
{
uint64_t deadline;
/* stay at 0xffffffff if postponed_jobs is going to overflow */
if ( the_period->postponed_jobs != UINT32_MAX ) {
++the_period->postponed_jobs;
}
the_period->state = RATE_MONOTONIC_EXPIRED;
deadline = _Watchdog_Per_CPU_insert_ticks(
&the_period->Timer,
_Per_CPU_Get(),
the_period->next_length
);
the_period->latest_deadline = deadline;
_Rate_monotonic_Release( the_period, lock_context );
}
void _Rate_monotonic_Timeout( Watchdog_Control *the_watchdog )
{
Rate_monotonic_Control *the_period;
Thread_Control *owner;
ISR_lock_Context lock_context;
Thread_Wait_flags wait_flags;
the_period = RTEMS_CONTAINER_OF( the_watchdog, Rate_monotonic_Control, Timer );
owner = the_period->owner;
_ISR_lock_ISR_disable( &lock_context );
_Rate_monotonic_Acquire_critical( the_period, &lock_context );
wait_flags = _Thread_Wait_flags_get( owner );
if (
( wait_flags & THREAD_WAIT_CLASS_PERIOD ) != 0
&& owner->Wait.return_argument == the_period
) {
bool unblock;
bool success;
owner->Wait.return_argument = NULL;
success = _Thread_Wait_flags_try_change_release(
owner,
RATE_MONOTONIC_INTEND_TO_BLOCK,
RATE_MONOTONIC_READY_AGAIN
);
if ( success ) {
unblock = false;
} else {
_Assert( _Thread_Wait_flags_get( owner ) == RATE_MONOTONIC_BLOCKED );
_Thread_Wait_flags_set( owner, RATE_MONOTONIC_READY_AGAIN );
unblock = true;
}
_Rate_monotonic_Restart( the_period, owner, &lock_context );
if ( unblock ) {
_Thread_Unblock( owner );
}
} else {
_Rate_monotonic_Renew_deadline( the_period, &lock_context );
}
}
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