static long dbPutFieldLink(DBADDR *paddr,
short dbrType, const void *pbuffer, long nRequest)
{
dbLinkInfo link_info;
DBADDR *pdbaddr = NULL;
dbCommon *precord = paddr->precord;
dbCommon *lockrecs[2];
dbLocker locker;
dbFldDes *pfldDes = paddr->pfldDes;
long special = paddr->special;
struct link *plink = (struct link *)paddr->pfield;
const char *pstring = (const char *)pbuffer;
struct dsxt *old_dsxt = NULL;
struct dset *new_dset = NULL;
struct dsxt *new_dsxt = NULL;
devSup *new_devsup = NULL;
long status;
int isDevLink;
short scan;
STATIC_ASSERT(DBLOCKER_NALLOC>=2);
switch (dbrType) {
case DBR_CHAR:
case DBR_UCHAR:
if (pstring[nRequest - 1] != '\0')
return S_db_badDbrtype;
break;
case DBR_STRING:
break;
default:
return S_db_badDbrtype;
}
status = dbParseLink(pstring, pfldDes->field_type, &link_info);
if (status)
return status;
if (link_info.ltype == PV_LINK &&
(link_info.modifiers & (pvlOptCA | pvlOptCP | pvlOptCPP)) == 0) {
DBADDR tempaddr;
if (dbNameToAddr(link_info.target, &tempaddr)==0) {
/* This will become a DB link. */
pdbaddr = malloc(sizeof(*pdbaddr));
if (!pdbaddr) {
status = S_db_noMemory;
goto cleanup;
}
*pdbaddr = tempaddr; /* struct copy */
}
}
isDevLink = ellCount(&precord->rdes->devList) > 0 &&
pfldDes->isDevLink;
memset(&locker, 0, sizeof(locker));
lockrecs[0] = precord;
lockrecs[1] = pdbaddr ? pdbaddr->precord : NULL;
dbLockerPrepare(&locker, lockrecs, 2);
dbScanLockMany(&locker);
scan = precord->scan;
if (isDevLink) {
new_devsup = dbDTYPtoDevSup(precord->rdes, precord->dtyp);
if (new_devsup) {
new_dset = new_devsup->pdset;
new_dsxt = new_devsup->pdsxt;
}
}
if (dbCanSetLink(plink, &link_info, new_devsup)) {
/* link type mis-match prevents assignment */
status = S_dbLib_badField;
goto unlock;
}
if (isDevLink) {
if (precord->dset) {
devSup *old_devsup = dbDSETtoDevSup(precord->rdes, precord->dset);
if (old_devsup)
old_dsxt = old_devsup->pdsxt;
}
if (new_dsxt == NULL ||
new_dsxt->add_record == NULL ||
(precord->dset && old_dsxt == NULL) ||
(old_dsxt && old_dsxt->del_record == NULL)) {
status = S_db_noSupport;
goto unlock;
}
if (scan == menuScanI_O_Intr) {
scanDelete(precord);
precord->scan = menuScanPassive;
}
if (old_dsxt) {
status = old_dsxt->del_record(precord);
if (status)
goto restoreScan;
}
}
switch (plink->type) { /* Old link type */
case DB_LINK:
case CA_LINK:
case CONSTANT:
dbRemoveLink(&locker, plink); /* link type becomes PV_LINK */
break;
case PV_LINK:
case MACRO_LINK:
break; /* should never get here */
default: /* Hardware address */
if (!isDevLink) {
status = S_db_badHWaddr;
goto restoreScan;
}
break;
}
if (special) status = dbPutSpecial(paddr, 0);
if (!status) status = dbSetLink(plink, &link_info, new_devsup);
if (!status && special) status = dbPutSpecial(paddr, 1);
if (status) {
if (isDevLink) {
precord->dset = NULL;
precord->pact = TRUE;
}
goto postScanEvent;
}
if (isDevLink) {
precord->dpvt = NULL;
precord->dset = new_dset;
precord->pact = FALSE;
status = new_dsxt->add_record(precord);
if (status) {
precord->dset = NULL;
precord->pact = TRUE;
goto postScanEvent;
}
}
switch (plink->type) { /* New link type */
case PV_LINK:
case CONSTANT:
dbAddLink(&locker, plink, pfldDes->field_type, pdbaddr);
break;
case DB_LINK:
case CA_LINK:
case MACRO_LINK:
break; /* should never get here */
default: /* Hardware address */
if (!isDevLink) {
status = S_db_badHWaddr;
goto postScanEvent;
}
break;
}
db_post_events(precord, plink, DBE_VALUE | DBE_LOG);
restoreScan:
if (isDevLink &&
scan == menuScanI_O_Intr) { /* undo scanDelete() */
precord->scan = scan;
scanAdd(precord);
}
postScanEvent:
if (scan != precord->scan)
db_post_events(precord, &precord->scan, DBE_VALUE | DBE_LOG);
unlock:
dbScanUnlockMany(&locker);
dbLockerFinalize(&locker);
cleanup:
free(link_info.target);
return status;
}
static long dbPutFieldLink(DBADDR *paddr,
short dbrType, const void *pbuffer, long nRequest)
{
dbCommon *precord = paddr->precord;
dbFldDes *pfldDes = paddr->pfldDes;
long special = paddr->special;
DBLINK *plink = (DBLINK *)paddr->pfield;
const char *pstring = (const char *)pbuffer;
DBENTRY dbEntry;
DBADDR dbaddr;
struct dsxt *old_dsxt = NULL;
struct dset *new_dset = NULL;
struct dsxt *new_dsxt = NULL;
long status;
int isDevLink;
short scan;
switch (dbrType) {
case DBR_CHAR:
case DBR_UCHAR:
if (pstring[nRequest - 1] != '\0')
return S_db_badDbrtype;
break;
case DBR_STRING:
break;
default:
return S_db_badDbrtype;
}
dbInitEntry(pdbbase, &dbEntry);
status = dbFindRecord(&dbEntry, precord->name);
if (!status) status = dbFindField(&dbEntry, pfldDes->name);
if (status) goto finish;
isDevLink = ellCount(&precord->rdes->devList) > 0 &&
(strcmp(pfldDes->name, "INP") == 0 ||
strcmp(pfldDes->name, "OUT") == 0);
dbLockSetGblLock();
dbLockSetRecordLock(precord);
scan = precord->scan;
if (isDevLink) {
devSup *pdevSup = dbDTYPtoDevSup(precord->rdes, precord->dtyp);
if (pdevSup) {
new_dset = pdevSup->pdset;
new_dsxt = pdevSup->pdsxt;
}
if (precord->dset) {
pdevSup = dbDSETtoDevSup(precord->rdes, precord->dset);
if (pdevSup)
old_dsxt = pdevSup->pdsxt;
}
if (new_dsxt == NULL ||
new_dsxt->add_record == NULL ||
(precord->dset && old_dsxt == NULL) ||
(old_dsxt && old_dsxt->del_record == NULL)) {
status = S_db_noSupport;
goto unlock;
}
if (scan == menuScanI_O_Intr) {
scanDelete(precord);
precord->scan = menuScanPassive;
}
if (old_dsxt) {
status = old_dsxt->del_record(precord);
if (status)
goto restoreScan;
}
}
switch (plink->type) { /* Old link type */
case DB_LINK:
free(plink->value.pv_link.pvt);
plink->value.pv_link.pvt = 0;
plink->type = PV_LINK;
plink->value.pv_link.getCvt = 0;
plink->value.pv_link.pvlMask = 0;
plink->value.pv_link.lastGetdbrType = 0;
dbLockSetSplit(precord);
break;
case CA_LINK:
dbCaRemoveLink(plink);
plink->type = PV_LINK;
plink->value.pv_link.getCvt = 0;
plink->value.pv_link.pvlMask = 0;
plink->value.pv_link.lastGetdbrType = 0;
break;
case CONSTANT:
break; /* do nothing */
case PV_LINK:
case MACRO_LINK:
break; /* should never get here */
default: /* Hardware address */
if (!isDevLink) {
status = S_db_badHWaddr;
goto restoreScan;
}
break;
}
if (special) status = dbPutSpecial(paddr, 0);
if (!status) status = dbPutString(&dbEntry, pstring);
if (!status && special) status = dbPutSpecial(paddr, 1);
if (status) {
if (isDevLink) {
precord->dset = NULL;
precord->pact = TRUE;
}
goto postScanEvent;
}
if (isDevLink) {
precord->dpvt = NULL;
precord->dset = new_dset;
precord->pact = FALSE;
status = new_dsxt->add_record(precord);
if (status) {
precord->dset = NULL;
precord->pact = TRUE;
goto postScanEvent;
}
}
switch (plink->type) { /* New link type */
case PV_LINK:
if (plink == &precord->tsel)
recGblTSELwasModified(plink);
plink->value.pv_link.precord = precord;
if (!(plink->value.pv_link.pvlMask & (pvlOptCA|pvlOptCP|pvlOptCPP)) &&
(dbNameToAddr(plink->value.pv_link.pvname, &dbaddr) == 0)) {
/* It's a DB link */
DBADDR *pdbAddr;
plink->type = DB_LINK;
pdbAddr = dbMalloc(sizeof(struct dbAddr));
*pdbAddr = dbaddr; /* NB: structure copy */;
plink->value.pv_link.pvt = pdbAddr;
dbLockSetRecordLock(pdbAddr->precord);
dbLockSetMerge(precord, pdbAddr->precord);
} else { /* Make it a CA link */
char *pperiod;
plink->type = CA_LINK;
if (pfldDes->field_type == DBF_INLINK) {
plink->value.pv_link.pvlMask |= pvlOptInpNative;
}
dbCaAddLink(plink);
if (pfldDes->field_type == DBF_FWDLINK) {
pperiod = strrchr(plink->value.pv_link.pvname, '.');
if (pperiod && strstr(pperiod, "PROC"))
plink->value.pv_link.pvlMask |= pvlOptFWD;
}
}
break;
case CONSTANT:
break;
case DB_LINK:
case CA_LINK:
case MACRO_LINK:
break; /* should never get here */
default: /* Hardware address */
if (!isDevLink) {
status = S_db_badHWaddr;
goto postScanEvent;
}
break;
}
db_post_events(precord, plink, DBE_VALUE | DBE_LOG);
restoreScan:
if (isDevLink &&
scan == menuScanI_O_Intr) { /* undo scanDelete() */
precord->scan = scan;
scanAdd(precord);
}
postScanEvent:
if (scan != precord->scan)
db_post_events(precord, &precord->scan, DBE_VALUE|DBE_LOG);
unlock:
dbLockSetGblUnlock();
finish:
dbFinishEntry(&dbEntry);
return status;
}