Hi, The current TMultiReadExclusiveWriteSynchronizer as implemented in FPC 2.3.1 is wrong. It use Critical Sections in a standard way which means it blocks all other threads while one thread is doing a Read. This is wrong. It is a MULTI read, SINGLE write synchronizer. So it must only block other thread is a Write is in progress. But allow multiple reads while no Write is in progress.
The TMultiReadExclusiveWriteSynchronizer is currently equivalent to the Delphi 7 TSimpleRWSync class, not the Delphi TMultiReadExclusiveWriteSynchronizer class. I have a corrected TMultiReadExclusiveWriteSynchronizer implementation (don't worry, not based on Delphi implementation) that I can donate to FPC. I just need confirmation that the current implementation in FPC is incorrect though. Regards, - Graeme - -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://opensoft.homeip.net/fpgui/ _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
