[Lazarus] lNet UDP and the send-function

[IntelliAdmin Support]

Ahh. OK. Now I see.

Thanks,

Joel

On Thu, Dec 24, 2009 at 7:35 AM, John vd Waeter <john at jvdw.nl> 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 <john at jvdw.nl> 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....
>>>
>>> --
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>
>
> --
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