136 lines
2.9 KiB
C++
136 lines
2.9 KiB
C++
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/*
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* $Id$
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*
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*
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* L O S A L A M O S
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* Los Alamos National Laboratory
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* Los Alamos, New Mexico 87545
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*
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* Copyright, 1986, The Regents of the University of California.
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*
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*
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* Author Jeffrey O. Hill
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* johill@lanl.gov
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* 505 665 1831
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*/
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#include <limits.h>
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#define epicsAssertAuthor "Jeff Hill johill@lanl.gov"
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#include "iocinf.h"
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#include "cac.h"
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#define epicsExportSharedSymbols
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#include "caerr.h" // for CA_INTERNAL
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#undef epicsExportSharedSymbols
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ioCounterNet::ioCounterNet () : pndrecvcnt ( 0u ), readSeq ( 0u )
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{
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}
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void ioCounterNet::increment ()
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{
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epicsAutoMutex locker ( this->mutex );
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if ( this->pndrecvcnt < UINT_MAX ) {
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this->pndrecvcnt++;
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}
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else {
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throwWithLocation ( caErrorCode (ECA_INTERNAL) );
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}
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}
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unsigned ioCounterNet::sequenceNumber () const
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{
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return this->readSeq;
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}
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unsigned ioCounterNet::currentCount () const
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{
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return this->pndrecvcnt;
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}
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void ioCounterNet::waitForCompletion ( double delaySec )
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{
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this->ioDone.wait ( delaySec );
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}
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void ioCounterNet::cleanUp ()
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{
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epicsAutoMutex locker ( this->mutex );
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this->readSeq++;
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this->pndrecvcnt = 0u;
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}
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void ioCounterNet::decrement ()
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{
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bool signalNeeded;
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{
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epicsAutoMutex locker ( this->mutex );
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if ( this->pndrecvcnt > 0u ) {
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this->pndrecvcnt--;
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if ( this->pndrecvcnt == 0u ) {
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signalNeeded = true;
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}
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else {
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signalNeeded = false;
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}
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}
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else {
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signalNeeded = true;
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}
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}
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if ( signalNeeded ) {
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this->ioDone.signal ();
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}
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}
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void ioCounterNet::decrement ( unsigned seqNumber )
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{
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bool signalNeeded;
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{
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epicsAutoMutex locker ( this->mutex );
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if ( this->readSeq == seqNumber ) {
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if ( this->pndrecvcnt > 0u ) {
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this->pndrecvcnt--;
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if ( this->pndrecvcnt == 0u ) {
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signalNeeded = true;
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}
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else {
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signalNeeded = false;
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}
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}
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else {
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signalNeeded = true;
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}
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}
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else {
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signalNeeded = false;
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}
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}
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if ( signalNeeded ) {
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this->ioDone.signal ();
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}
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}
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void ioCounterNet::show ( unsigned level ) const
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{
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::printf ( "ioCounterNet at %p\n",
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static_cast <const void *> ( this ) );
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::printf ( "\tthere are %u unsatisfied IO operations blocking ca_pend_io()\n",
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this->pndrecvcnt );
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if ( level > 0u ) {
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::printf ( "\tthe current read sequence number is %u\n",
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this->readSeq );
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}
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if ( level > 1u ) {
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::printf ( "IO done event:\n");
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this->ioDone.show ( level - 2u );
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}
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}
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