Files
pcas/src/std/dev/devSiSoft.c
Andrew Johnson bbd94928bb Minimize work done in readLocked() routine
Move post-I/O work back to the read_xx routines.
2017-04-26 15:59:03 -05:00

84 lines
2.0 KiB
C

/*************************************************************************\
* 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.
\*************************************************************************/
/*
* Author: Janet Anderson
* Date: 04-21-91
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "alarm.h"
#include "dbDefs.h"
#include "dbAccess.h"
#include "epicsTime.h"
#include "recGbl.h"
#include "devSup.h"
#include "link.h"
#include "stringinRecord.h"
#include "epicsExport.h"
/* Create the dset for devSiSoft */
static long init_record(stringinRecord *prec);
static long read_stringin(stringinRecord *prec);
struct {
long number;
DEVSUPFUN report;
DEVSUPFUN init;
DEVSUPFUN init_record;
DEVSUPFUN get_ioint_info;
DEVSUPFUN read_stringin;
} devSiSoft = {
5,
NULL,
NULL,
init_record,
NULL,
read_stringin
};
epicsExportAddress(dset, devSiSoft);
static long init_record(stringinRecord *prec)
{
if (recGblInitConstantLink(&prec->inp, DBF_STRING, prec->val))
prec->udf = FALSE;
return 0;
}
static long readLocked(struct link *pinp, void *dummy)
{
stringinRecord *prec = (stringinRecord *) pinp->precord;
long status = dbGetLink(pinp, DBR_STRING, prec->val, 0, 0);
if (status) return status;
if (dbLinkIsConstant(&prec->tsel) &&
prec->tse == epicsTimeEventDeviceTime)
dbGetTimeStamp(pinp, &prec->time);
return status;
}
static long read_stringin(stringinRecord *prec)
{
long status = dbLinkDoLocked(&prec->inp, readLocked, NULL);
if (status == S_db_noLSET)
status = readLocked(&prec->inp, NULL);
if (!status && !dbLinkIsConstant(&prec->inp))
prec->udf = FALSE;
return status;
}