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<!DOCTYPE concept
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<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>