[Lazarus] semaphores [solved]

[Antonio Fortuny]

Le 09/02/2012 11:02, Sven Barth a écrit :
> Am 09.02.2012 10:53, schrieb Antonio Fortuny:
>>
>>
>> Le 09/02/2012 10:36, Michael Schnell a écrit :
>>> On 02/09/2012 09:22 AM, Antonio Fortuny wrote:
>>>>
>>>>
>>>> TEventObject in syncobjs unit does exactly the job.
>>>
>>> The documentation on TEventObject suggest that it is for synchronizing
>>> multiple threads of a single process and not for synchronizing
>>> multiple independently running processes.
>> I've made a test on Win32 and the TEventObject is blocking system wide.
>> Three instances af the same program are running (which means three
>> independent processes) using the same named TEventObject. The first
>> acquiring te event locks it for the two other whichever is the blocking
>> process. This means that the TEventObject uses is managed by the OS at
>> the kernel level.
>> I'll port the name test on WIN64 and Linux64 to see what happens.
>> The documentation says:
>> "/Other threads that wish to be notified of these events should create
>> their own instances of TEventObject with the same name, and wait for
>> events to arrive/." which in turn suggests that any thread insterested
>> in a names event must have its own instance of the object
>> Anyway, it appears to work.
>
> If I were you I'd first test it on Linux as soon as possible, because 
> it might just be because of the Windows implementation that it works 
> (the Windows and Linux implementations are completely different)
I know, it's planned for next monday.
>
> Regards,
> Sven
>
>
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