Add DbState soft support for bi/bo records.

2012-04-27 13:25:18 -04:00
parent 83586b49d0
commit 03a30f3b8f
4 changed files with 183 additions and 0 deletions
--- a/src/std/dev/devBiDbState.c
+++ b/src/std/dev/devBiDbState.c
@@ -0,0 +1,92 @@
+/*************************************************************************\
+* Copyright (c) 2010 Brookhaven National Laboratory.
+* Copyright (c) 2010 Helmholtz-Zentrum Berlin
+*     fuer Materialien und Energie GmbH.
+* EPICS BASE is distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution.
+\*************************************************************************/
+
+/*
+ *  Author: Ralph Lange <Ralph.Lange@bessy.de>
+ */
+
+#include "errlog.h"
+#include "dbState.h"
+#include "devSup.h"
+#include "recGbl.h"
+#include "dbLink.h"
+#include "dbAccessDefs.h"
+#include "epicsExport.h"
+#include "biRecord.h"
+
+#define DEVSUPNAME "devBiDbState"
+
+static long add_record (struct dbCommon *pdbc)
+{
+    biRecord *prec = (biRecord *) pdbc;
+
+    if (INST_IO != prec->inp.type) {
+        recGblRecordError(S_db_badField, (void *) prec, DEVSUPNAME ": Illegal INP field");
+        return(S_db_badField);
+    }
+
+    if (!(prec->dpvt = dbStateFind(prec->inp.value.instio.string)) &&
+        prec->inp.value.instio.string &&
+        '\0' != *prec->inp.value.instio.string) {
+        errlogSevPrintf(errlogInfo, DEVSUPNAME ": Creating new db state '%s'\n",
+                        prec->inp.value.instio.string);
+        prec->dpvt = dbStateCreate(prec->inp.value.instio.string);
+    }
+    return 0;
+}
+
+static long del_record (struct dbCommon *pdbc)
+{
+    biRecord *prec = (biRecord *) pdbc;
+    prec->dpvt = NULL;
+    return 0;
+}
+
+static struct dsxt myDsxt = {
+    add_record,
+    del_record
+};
+
+static long init(int pass)
+{
+    if (pass == 0)
+        devExtend(&myDsxt);
+    return 0;
+}
+
+static long read_bi(biRecord *prec)
+{
+    if (prec->dpvt) {
+        prec->val = dbStateGet(prec->dpvt);
+        prec->udf = FALSE;
+    }
+
+    if (prec->tsel.type == CONSTANT &&
+        prec->tse == epicsTimeEventDeviceTime)
+        dbGetTimeStamp(&prec->inp, &prec->time);
+
+    return 2;
+}
+
+static struct {
+        long		number;
+        DEVSUPFUN	report;
+        DEVSUPFUN	init;
+        DEVSUPFUN	init_record;
+        DEVSUPFUN	get_ioint_info;
+        DEVSUPFUN	read_bi;
+} devBiDbState = {
+        5,
+        NULL,
+        init,
+        NULL,
+        NULL,
+        read_bi
+};
+
+epicsExportAddress(dset, devBiDbState);