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diff --git a/docs/afb-timer.md b/docs/afb-timer.md new file mode 100644 index 0000000..d02ab69 --- /dev/null +++ b/docs/afb-timer.md @@ -0,0 +1,48 @@ +# AFB Timer functions reference + +## TimerHandleT + +Members are: + +* `count`: integer representing the number of times the timers should run. +* `delay`: millisecond integer representing the delay to wait before and between + the callback run. +* `uid`: a string identifying the timer. +* `context`: an opaq pointer that could be used in the callback function. +* `evtSource`: a systemd event source struct. Should be NULL. +* `api`: the AFB api pointer. +* `callback`: a function pointer for the callback to call at timer expiration +* `freeCB`: a function pointer called after expiration of the timer. Mainly meant + to release the context pointer by example. + +## void TimerEvtStart(afb_api_t api, TimerHandleT *timerHandle, timerCallbackT callback, void *context) + +Start a timer which invokes the callback when the delay expires for `count` +times. + +* `api`: AFB api pointer. +* `timerHandle`: pointer to struct representing a timer. +* `callback`: a function pointer for the callback to call at timer expiration +* `context`: an opaq pointer that could be used in the callback function. + +## void TimerEvtStop(TimerHandleT *timerHandle) + +Manually stop the timer's run. If the `count` isn't finished then it will end +the timer and no other runs will occur. + +* `timerHandle`: pointer to struct representing a timer. + +## uint64_t LockWait(afb_api_t api, uint64_t utimeout) + +It is function acting like a non-blocking sleep for an API. It lets the main API +event loop runs while you are waiting and will unlock at the first received +event and returns the remaining time to wait if an event occurs or 0 if no events +occured and timeout hits. Then you have to manually ensure that once an event +has been received that it was the one you are waiting for and if not launch again +the wait with the remaining time returned. + +* `api`: AFB api pointer. +* `timeout`: timeout in microsecond. + +Returns the remaining time in microsecond to wait if an event occurs or 0 if no +events occured and timeout hits |