There were some words about handles thesedays, and I'd like to make
something clear.
When resizing record (DmResizeRecord) we should take (eventual) new handle
into further processing for the reasons described in manual (it can change
if there isn't enough space to do resizing etc.). Now, if I LOCK record's
handle BEFORE resizing (do some operations on data) and then resize record
and take new handle, what would happen with old handle when I call
MemPtrUnlock (and then DmReleaseRecord)? If it wewen't changed by
DmResize, it would be unlocked, but what would happen if it was?
See the next example (I'll skip obvious declarations, it's just shematic
example):
error=DmFindRecordByID(sampleDB,uniqueID,&index);
handle=MemHandleLock(DmGetRecord(sampleDB,index));
ptr=LockDataPtr(SrcID);
//...doing some things on data...
handle=DmResizeRecord(sampleDB,index,size);
MemPtrUnlock(ptr);
DmReleaseRecord(sampleDB,index,true);
Of course, it would be the best to unlock all and then do resizing, but
what if I don't?
Sorry for eventual mistyppos in the example above (I don't have manual
or code right now) but I think you got the idea.
