> Sharing a file exclusively locked very briefly and getting everything > to work correctly amongst multiple programs can be brain-twisting. > With increasing use of mulit-cores, the possibility for sharing files > using any lock technique is more important than ever before > because all associated programs can execute simultaneously. >
You can use the LOCK/UNLOCK commands and a specific void file on the disk to create system exclusive sections in your code. Let's suppose you want to modify a file named "/tmp/foo". ... DIM hLock AS Stream DIM hFile AS Stream ' Try to acquire the lock TRY hLock = LOCK "/tmp/foo.lock" IF ERROR THEN PRINT "'foo' is being modified. Try again later." RETURN ENDIF ' Lock was acquired, you can modify the file now! hFile = OPEN "/tmp/foo" FOR OUTPUT ... CLOSE #hFile ' Do not forget to release the lock UNLOCK hLock ... -- Benoît ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user