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fix race condition

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This commit is contained in:
Marty Kraimer
2001-04-06 12:45:06 +00:00
parent 79eebbd8f8
commit ae74e745f3
1 changed files with 5 additions and 2 deletions
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7
src/db/dbLock.c
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@@ -218,11 +218,14 @@ void epicsShareAPI dbLockSetRecordLock(dbCommon *precord)
return;
}
plockSet->state = lockSetStateRecordLock;
while(plockSet->nWaiting) {
while(1) {
epicsMutexUnlock(lockSetModifyLock);
epicsThreadSleep(.1);
epicsMutexMustLock(plockSet->lock);
epicsMutexMustLock(lockSetModifyLock);
if(plockSet->nWaiting == 0) break;
epicsThreadSleep(.1);
}
epicsMutexUnlock(plockSet->lock);
ellDelete(&lockSetList[plockSet->type],&plockSet->node);
ellAdd(&lockSetList[listTypeRecordLock],&plockSet->node);
plockSet->type = listTypeRecordLock;