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  ±è¿µ´ë(2003-03-07 21:00:34, Hit : 4299, Vote : 1123
 Record Lock °Ë»ç

"Search the Borland Web Site"
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¿¡¼­ "record lock" À¸·Î °Ë»öÇØ º¸½Ã¸é Âü°í°¡ µÇ½Ç°Ì´Ï´Ù

function fDbiIsRecordLocked(Table: TTable): Boolean;
var
Locked: BOOL;
hCur: hDBICur;
rslt: DBIResult;
ByAnyone: boolean;
begin
Table.UpdateCursorPos;
// Is the record locked by the current session...
Check(DbiIsRecordLocked(Table.Handle, Locked));
Result := Locked;
// If the current session does not have a lock and the ByAnyone varable is
// set to check all sessions, continue check...

{ Always do this, so works with all current calls. }
ByAnyone := True;

if (Result = False) and (ByAnyone = True) then
begin
   // Get a new cursor to the same record...
   Check(DbiCloneCursor(Table.Handle, False, False, hCur));
   try
     // Try and get the record with a write lock...
     rslt := DbiGetRecord(hCur, dbiWRITELOCK, nil, nil);
     if rslt <> DBIERR_NONE then
       begin
         // if an error occured and it is a lock error, return true...
         if HiByte(rslt) = ERRCAT_LOCKCONFLICT then
           Result := True
         else
           // If some other error happened, throw an exception...
           Check(rslt);
       end
     else
       // Release the lock in this session if the function was successful...
       Check(DbiRelRecordLock(hCur, False));
   finally
     // Close the cloned cursor...
     Check(DbiCloseCursor(hCur));
   end;
end;
end;





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