I have the following code:
skelACWorkDBType findRecord, r; // where this is the database
structure
...
r.TimeH = (record->TimeH);
r.TimeM = (record->TimeM);
r.TimeS = (record->TimeS);
...
MemPtr p = MemHandleLock(h);
Err err = DmWrite(p, 0, &r, sizeof(r));
Now - I have this all over the place... and in only one instance and
only on a Treo/T|T/T|5 will this give me a DmWriteCheck Crash Error
(dmErrWriteOutOfBounds). This problem does not occur on the Palm
Emulators at all (debug or release).
When I replaced
Err err = DmWrite(p, 0, &r, sizeof(r));
with Err err = DmWrite(p, 0, &r, sizeof(skelACWorkDBType));
the problem goes away. Now looking at this, this should be the correct
way to do it - so the question is why would the former work everywhere else?
Now the interesting thing is that new records created after this code
change don't fail, but old records do.
I added the following code:
if (DmWriteCheck(p, 0, sizeof(skelACWorkDBType)) == errNone)
error = DmWrite(p, 0, &r, sizeof(skelACWorkDBType));
else {
MemHandle hTmp = DmResizeRecord (gACCatDB,
gAEROBICINDEX, sizeof(skelACWorkDBType));
MemPtr pTmp = (skelACCatDBType*)
MemHandleLock(hTmp);
error = DmWrite(pTmp, 0, &r, sizeof(skelACWorkDBType));
MemPtrUnlock(pTmp);
}
MemPtrUnlock(p);
DmReleaseRecord(gACWorkDB, gAEROBICINDEX, true);
Sure enough, it fails on the DmWriteCheck and moves to the else
statement (even though the sizes are the same (154 bytes - as I am not
using packed records). It resiszes the record, writes the data to the
record w/o error, but in this case, the changes are not saved to the record.
Any ideas?
--
For information on using the PalmSource Developer Forums, or to unsubscribe,
please see http://www.palmos.com/dev/support/forums/
