tcpSendWatchdog.cpp

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/*************************************************************************\
* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
*     National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
*     Operator of Los Alamos National Laboratory.
* EPICS BASE is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/

/*
 *
 *                    L O S  A L A M O S
 *              Los Alamos National Laboratory
 *               Los Alamos, New Mexico 87545
 *
 *  Copyright, 1986, The Regents of the University of California.
 *
 *  Author: Jeff Hill
 */

#define epicsAssertAuthor "Jeff Hill johill@lanl.gov"

#include "iocinf.h"
#include "cac.h"
#include "virtualCircuit.h"

tcpSendWatchdog::tcpSendWatchdog (
        epicsMutex & cbMutexIn, cacContextNotify & ctxNotifyIn,
        epicsMutex & mutexIn, tcpiiu & iiuIn,
        double periodIn, epicsTimerQueue & queueIn ) :
        period ( periodIn ), timer ( queueIn.createTimer () ),
        cbMutex ( cbMutexIn ), ctxNotify ( ctxNotifyIn ),
        mutex ( mutexIn ), iiu ( iiuIn )
{
}

tcpSendWatchdog::~tcpSendWatchdog ()
{
    this->timer.destroy ();
}

epicsTimerNotify::expireStatus tcpSendWatchdog::expire (
                 const epicsTime & /* currentTime */ )
{
    {
        epicsGuard < epicsMutex > guard ( this->mutex );
        if ( this->iiu.receiveThreadIsBusy ( guard ) ) {
            return expireStatus ( restart, this->period );
        }
    }
    {
        callbackManager mgr ( this->ctxNotify, this->cbMutex );
        epicsGuard < epicsMutex > guard ( this->mutex );
#   ifdef DEBUG
        char hostName[128];
        this->iiu.getHostName ( guard, hostName, sizeof ( hostName ) );
        debugPrintf ( ( "Request not accepted by CA server %s for %g sec. Disconnecting.\n",
            hostName, this->period ) );
#   endif
        this->iiu.sendTimeoutNotify ( mgr, guard );
    }
    return noRestart;
}

void tcpSendWatchdog::start ( const epicsTime & /* currentTime */ )
{
    this->timer.start ( *this, this->period );
}

void tcpSendWatchdog::cancel ()
{
    this->timer.cancel ();
}