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The dbCa Event task may fail.

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This commit is contained in:
Marty Kraimer
1996-10-15 19:18:29 +00:00
parent 63a377ce99
commit 97b96da957
1 changed files with 8 additions and 8 deletions
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16
src/db/dbCa.c
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@@ -43,6 +43,7 @@ of this distribution.
#include "dbCa.h"
/*Following is because dbScan.h causes include for dbAccess.h*/
void scanOnce(void *precord);
extern volatile int interruptAccept;
static ELLLIST caList; /* Work list for dbCaTask */
static SEM_ID caListSem; /*Mutual exclusions semaphores for caList*/
@@ -138,7 +139,7 @@ long dbCaGetLink(struct link *plink,short dbrType, char *pdest,
epicsPrintf("dbCaGetLink: semStatus!OK\n");
return(-1);
}
if(ca_state(pca->chid) != cs_conn) {
if(!pca->chid || ca_state(pca->chid) != cs_conn) {
pca->sevr = INVALID_ALARM;
goto done;
}
@@ -214,7 +215,7 @@ long dbCaPutLink(struct link *plink,short dbrType,
epicsPrintf("dbCaGetLink: semStatus!OK\n");
return(-1);
}
if(ca_state(pca->chid) != cs_conn) {
if(!pca->chid || ca_state(pca->chid) != cs_conn) {
semGive(pca->lock);
return(-1);
}
@@ -305,8 +306,7 @@ caAttributes *getpcaAttributes(struct link *plink)
if(!plink || (plink->type!=CA_LINK)) return(NULL);
pca = (caLink *)plink->value.pv_link.pvt;
if(!pca) return(NULL);
if(ca_state(pca->chid)!=cs_conn) return(NULL);
if(!pca->chid || ca_state(pca->chid)!=cs_conn) return(NULL);
return(pca->pcaAttributes);
}
@@ -374,8 +374,7 @@ long dbCaGetNelements(struct link *plink,long *nelements)
if(!plink) return(-1);
if(plink->type != CA_LINK) return(-1);
pca = (caLink *)plink->value.pv_link.pvt;
if(!pca) return(-1);
if(ca_state(pca->chid)!=cs_conn) return(-1);
if(!pca->chid || ca_state(pca->chid)!=cs_conn) return(-1);
*nelements = pca->nelements;
return(0);
}
@@ -387,8 +386,7 @@ long dbCaGetSevr(struct link *plink,short *severity)
if(!plink) return(-1);
if(plink->type != CA_LINK) return(-1);
pca = (caLink *)plink->value.pv_link.pvt;
if(!pca) return(-1);
if(ca_state(pca->chid)!=cs_conn) return(-1);
if(!pca->chid || ca_state(pca->chid)!=cs_conn) return(-1);
*severity = pca->sevr;
return(0);
}
@@ -606,6 +604,8 @@ void dbCaTask()
int status;
SEVCHK(ca_task_initialize(),NULL);
/*Dont do anything until iocInit initializes database*/
while(!interruptAccept) taskDelay(10);
/* channel access event loop */
while (TRUE){
semTake(caWakeupSem,WAIT_FOREVER);