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work correctly on systems without preemptive schedualing

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This commit is contained in:
Jeff Hill
2001-07-12 23:48:14 +00:00
parent bc0b51dbe4
commit ef4ebf4d4b
2 changed files with 9 additions and 1 deletions
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9
src/ca/cac.cpp
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@@ -121,7 +121,8 @@ cac::cac ( cacNotify &notifyIn, bool enablePreemptiveCallbackIn ) :
readSeq ( 0u ),
enablePreemptiveCallback ( enablePreemptiveCallbackIn ),
ioInProgress ( false ),
recvProcessThreadExitRequest ( false )
recvProcessThreadExitRequest ( false ),
recvProcessPending ( false )
{
long status;
unsigned abovePriority;
@@ -599,6 +600,10 @@ int cac::pendEvent ( const double &timeout )
else if ( timeout >= CAC_SIGNIFICANT_SELECT_DELAY ) {
epicsThreadSleep ( timeout );
}
// give up the processor if there is recv processing to be done
else if ( this->recvProcessPending ) {
epicsThreadSleep ( timeout );
}
}
this->disableCallbackPreemption ();
@@ -683,9 +688,11 @@ void cac::run ()
this->attachToClientCtx ();
while ( ! this->recvProcessThreadExitRequest ) {
{
this->recvProcessPending = true;
epicsAutoMutex autoMutexPCB ( this->preemptiveCallbackLock );
epicsAutoMutex autoMutex ( this->mutex );
this->processRecvBacklog ();
this->recvProcessPending = false;
}
this->recvProcessActivityEvent.wait ();
}