Sleep¶
Thread sleep implemented in CosmOS is used for suspending thread execution for the required periods of time. For this purpose, every thread has its alarm with timer and state variable configured in the operating system. The internal alarm timer has the same period as the scheduler preempt period. Still, we are not interrupting the task for the specified worst-case critical execution time during the critical task execution. However, the timer won’t be updated for this period. Inaccuracy can also be caused by executing a higher priority thread, which can delay the execution of the unblocked thread with an expired alarm. For more information please read the thread sleep section in the Whitepaper.
Code examples¶
Thread sleep¶
For thread sleep operation the function thread_sleepMs() was implemented.
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CosmOS_SleepStateType thread_sleepMs(BitWidthType delayMs)
#include <thread.h>
#include <errorHandler.h>
CosmOS_SleepStateType sleepState;
sleepState = thread_sleepMs( 100 );
if( errorHandler_isError( sleepState ) )
{
//error was returned, check its value
}