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<concept id="GUID-6752A77F-B1D1-49BE-A672-5DDE3B7976BF" xml:lang="en"><title>Other

Synchronisation APIs</title><shortdesc>This document describes APIs other than the nanokernel which device

drivers use for synchronisation.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>The Kernel provides APIs to wait in blocked state, unblocked state, and

nanokernel APIs to get the tick period, timer ticks, to sleep on nanothread,

and so on. </p>

<codeblock id="GUID-E70B072C-6CE9-572C-BF74-C7F4EE812CBF" xml:space="preserve">// Wait for a length of time specified in nanoseconds

// This is a blocking call, and is not generally recommended

// to be used. It should be used only for very short periods.

//

Kern::NanoWait(TUint32 aInterval);

// This API polls at specified regular intervals, for a

// specified number of attempts. A function implementing the polling

// operation is called at these intervals. This does not block the 

// thread. The poll period is in milliseconds.

// 

TInt Kern:: PollingWait(TPollFunction aFunction, TAny *aPtr, 

                TInt aPollPeriodMs, TInt aMaxPoll);

</codeblock>

</conbody></concept>