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Create minor optimisations (just an asm instruction or two) by using consts in a few places where previously a volatile variable that didn't change was used.

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Add the simple xTimerGetPeriod() and xTimerGetExpiryTime() functions.
This commit is contained in:
Richard Barry
2016-03-29 13:07:27 +00:00
parent 26d3770fad
commit aeb03e5fa0
5 changed files with 217 additions and 140 deletions
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26
FreeRTOS/Source/include/timers.h
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@ -1266,6 +1266,32 @@ BaseType_t xTimerPendFunctionCall( PendedFunction_t xFunctionToPend, void *pvPar
*/
const char * pcTimerGetTimerName( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
/**
* TickType_t xTimerGetPeriod( TimerHandle_t xTimer );
*
* Returns the period of a timer.
*
* @param xTimer The handle of the timer being queried.
*
* @return The period of the timer in ticks.
*/
TickType_t xTimerGetPeriod( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION;
/**
* TickType_t xTimerGetExpiryTime( TimerHandle_t xTimer );
*
* Returns the time in ticks at which the timer will expire. If this is less
* than the current tick count then the expiry time has overflowed from the
* current time.
*
* @param xTimer The handle of the timer being queried.
*
* @return If the timer is running then the time in ticks at which the timer
* will next expire is returned. If the timer is not running then the return
* value is undefined.
*/
TickType_t xTimerGetExpiryTime( TimerHandle_t xTimer ) PRIVILEGED_FUNCTION;
/*
* Functions beyond this part are not part of the public API and are intended
* for use by the kernel only.