devMbbiDirectSoft.c

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/*************************************************************************\
* Copyright (c) 2008 UChicago Argonne LLC, 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.
\*************************************************************************/

/*
 *      Original Authors: Bob Dalesio and Matthew Needes
 *      Date: 10-08-93
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "alarm.h"
#include "dbDefs.h"
#include "dbAccess.h"
#include "recGbl.h"
#include "devSup.h"
#include "mbbiDirectRecord.h"
#include "epicsExport.h"

/* Create the dset for devMbbiDirectSoft */
static long init_record(dbCommon *pcommon);
static long read_mbbi(mbbiDirectRecord *prec);

mbbidirectdset devMbbiDirectSoft = {
    {5, NULL, NULL, init_record, NULL},
    read_mbbi
};
epicsExportAddress(dset, devMbbiDirectSoft);

static long init_record(dbCommon *pcommon)
{
    mbbiDirectRecord *prec = (mbbiDirectRecord *)pcommon;

    if (recGblInitConstantLink(&prec->inp, DBR_ULONG, &prec->val))
        prec->udf = FALSE;

    return 0;
}

static long readLocked(struct link *pinp, void *dummy)
{
    mbbiDirectRecord *prec = (mbbiDirectRecord *) pinp->precord;
    long status = dbGetLink(pinp, DBR_ULONG, &prec->val, 0, 0);

    if (status) return status;

    prec->udf = FALSE;
    if (dbLinkIsConstant(&prec->tsel) &&
        prec->tse == epicsTimeEventDeviceTime)
        dbGetTimeStamp(pinp, &prec->time);

    return 2;
}

static long read_mbbi(mbbiDirectRecord *prec)
{
    long status = dbLinkDoLocked(&prec->inp, readLocked, NULL);

    if (status == S_db_noLSET)
        status = readLocked(&prec->inp, NULL);

    return status;
}