Jeff Hill
122 lines
3.7 KiB
C++
122 lines
3.7 KiB
C++
/*************************************************************************\
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* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* EPICS BASE Versions 3.13.7
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* and higher are distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/*
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* $Id$
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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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#define epicsExportSharedSymbols
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#include "casAsyncReadIOI.h"
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#include "casChannelI.h"
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casAsyncReadIOI::casAsyncReadIOI (
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casAsyncReadIO & intf, const casCtx & ctx ) :
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casAsyncIOI ( ctx ), msg ( *ctx.getMsg() ),
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asyncReadIO ( intf ), chan ( *ctx.getChannel () ),
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pDD ( NULL ), completionStatus ( S_cas_internal ),
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createChannelWasSuccessful ( false )
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{
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this->chan.installIO ( *this );
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}
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casAsyncReadIOI::~casAsyncReadIOI ()
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{
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this->asyncReadIO.serverInitiatedDestroy ();
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if ( this->msg.m_cmmd == CA_PROTO_CLAIM_CIU &&
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! this->createChannelWasSuccessful ) {
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delete & this->chan;
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}
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}
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caStatus casAsyncReadIOI::postIOCompletion (
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caStatus completionStatusIn, const gdd & valueRead )
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{
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this->pDD = & valueRead;
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this->completionStatus = completionStatusIn;
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return this->insertEventQueue ();
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}
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bool casAsyncReadIOI::oneShotReadOP () const
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{
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return true; // it is a read op
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}
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caStatus casAsyncReadIOI::cbFuncAsyncIO (
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epicsGuard < casClientMutex > & guard )
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{
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caStatus status;
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switch ( this->msg.m_cmmd ) {
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case CA_PROTO_READ:
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status = client.readResponse (
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guard, & this->chan, this->msg,
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* this->pDD, this->completionStatus );
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break;
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case CA_PROTO_READ_NOTIFY:
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status = client.readNotifyResponse (
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guard, & this->chan, this->msg, * this->pDD,
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this->completionStatus );
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break;
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case CA_PROTO_EVENT_ADD:
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status = client.monitorResponse (
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guard, this->chan, this->msg, * this->pDD,
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this->completionStatus );
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break;
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case CA_PROTO_CLAIM_CIU:
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unsigned nativeTypeDBR;
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status = this->chan.getPVI().bestDBRType ( nativeTypeDBR );
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if ( status ) {
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errMessage ( status, "best external dbr type fetch failed" );
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status = client.channelCreateFailedResp (
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guard, this->msg, status );
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if ( status != S_cas_sendBlocked ) {
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delete & this->chan;
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}
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}
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else {
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// we end up here if the channel claim protocol response is delayed
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// by an asynchronous enum string table fetch response
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if ( this->completionStatus == S_cas_success && this->pDD.valid() ) {
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this->chan.getPVI().updateEnumStringTableAsyncCompletion ( *this->pDD );
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}
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else {
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errMessage ( this->completionStatus,
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"unable to read application type \"enums\" string"
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" conversion table for enumerated PV" );
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}
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status = client.enumPostponedCreateChanResponse (
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guard, this->chan, this->msg, nativeTypeDBR );
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this->createChannelWasSuccessful =
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( status == S_cas_success );
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}
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break;
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default:
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errPrintf ( S_cas_invalidAsynchIO, __FILE__, __LINE__,
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" - client request type = %u", this->msg.m_cmmd );
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status = S_cas_invalidAsynchIO;
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break;
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}
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if ( status != S_cas_sendBlocked ) {
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this->chan.uninstallIO ( *this );
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}
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return status;
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}
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