Ahh. OK. Now I see. Thanks,
Joel On Thu, Dec 24, 2009 at 7:35 AM, John vd Waeter <[email protected]> wrote: > Hi Joel, > > No, that was not the problem. > > The buffer I talked about is actually a record. > > First I filled record.Buffer and record.sizeofbuffer > > Then I pass this record to a routine that calculates and adds a checksum > to the buffer, hereby adding 2 bytes to the buffer and thus adding 2 to the > size. > > Only now the record is ready to be sent by the UDP > > But the thread that does the sending just captured the buffer while it was > filled with the contents, but no crc added yet, so just inbetween the steps > mentioned above. Hence the size was 2 bytes smaller then expected. > > Just developing on x86. > > John > > > > > > IntelliAdmin Support wrote: >> >> John, >> >> I have a question about that. Normally access to integer values is >> atomic, and you do not need to thread protect them when accessing. Was >> this size value a 32 bit integer value? >> >> Or are you compiling on a different hardware platform than x86? >> >> Thanks, >> >> Joel >> >> On Thu, Dec 24, 2009 at 6:49 AM, John vd Waeter <[email protected]> wrote: >>> >>> Ok, solved. >>> Did not realize in multithread environment one thread could read a >>> variabele >>> when other thread was just not finished filling this variabele.... >>> >>> -- >>> _______________________________________________ >>> Lazarus mailing list >>> [email protected] >>> http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus >>> >> >> -- >> _______________________________________________ >> Lazarus mailing list >> [email protected] >> http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus >> > > > -- > John vd Waeter > www.jvdw.nl > www.gps-carpool.net > www.shotinthedark.nl > www.pdaforms.nl > www.dbapocket.nl > > [email protected] > > -- > _______________________________________________ > Lazarus mailing list > [email protected] > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus > -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
