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Added another tickless OS interface to get the timer remaining on the interval timer.

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This commit is contained in:
Gregory Nutt 2014-08-06 18:28:33 -06:00
parent b0324c00ee
commit c8a60b2916
1 changed files with 54 additions and 25 deletions
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79
include/nuttx/arch.h
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@ -1080,6 +1080,33 @@ int up_timer_cancel(void);
int up_timer_start(FAR const struct timespec *tp);
#endif
/****************************************************************************
* Name: up_timer_remaining
*
* Description:
* Return the time remaining until the next timer expiratino.
*
* Provided by platform-specific code and called from the RTOS base code.
*
* Input Parameters:
* tp - Location to return the remaining time. Zero should be returned
* if the timer is not active.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
* Assumptions:
* May be called from interrupt level handling or from the normal tasking
* level. Interrupts may need to be disabled internally to assure
* non-reentrancy.
*
****************************************************************************/
#ifdef CONFIG_SCHED_TICKLESS
int up_timer_remaining(FAR struct timespec *tp);
#endif
/****************************************************************************
* Name: up_timer_resolution
*
@ -1186,15 +1213,37 @@ void up_cxxinitialize(void);
* Name: sched_process_timer
*
* Description:
* This function handles system timer events.
* The timer interrupt logic itself is implemented in the
* architecture specific code, but must call the following OS
* function periodically -- the calling interval must be
* MSEC_PER_TICK.
* This function handles system timer events (only when
* CONFIG_SCHED_TICKLESS is *not* defined). The timer interrupt logic
* itself is implemented in the architecture specific code, but must call
* the following OS function periodically -- the calling interval must
* be MSEC_PER_TICK.
*
****************************************************************************/
#ifndef CONFIG_SCHED_TICKLESS
void sched_process_timer(void);
#endif
/****************************************************************************
* Name: sched_timer_expiration
*
* Description:
* if CONFIG_SCHED_TICKLESS is defined, then this function is provided by
* the RTOS base code and called from platform-specific code when the
* interval timer used to implemented the tick-less OS expires.
*
* Input Parameters:
*
* Returned Value:
* Base code implementation assumes that this function is called from
* interrupt handling logic with interrupts disabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_TICKLESS
void sched_timer_expiration(void);
#endif
/************************************************************************
* Name: sched_process_cpuload
@ -1230,26 +1279,6 @@ void weak_function sched_process_cpuload(void);
void irq_dispatch(int irq, FAR void *context);
/****************************************************************************
* Name: sched_timer_expiration
*
* Description:
* if CONFIG_SCHED_TICKLESS is defined, then this function is provided by
* the RTOS base code and called from platform-specific code when the
* interval timer used to implemented the tick-less OS expires.
*
* Input Parameters:
*
* Returned Value:
* Base code implementation assumes that this function is called from
* interrupt handling logic with interrupts disabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_TICKLESS
void sched_timer_expiration(void);
#endif
/****************************************************************************
* Name: up_check_stack and friends
*