[fpc-devel] semaphores and mutes

[Peter Popov]

I am not. As I explained, I was messing around with the Kylix  
implementation of SyncObjs

I don't know if this is currently a problem for FPC. At least version  
2.0.4 had the issue (under linux).
If it still is, let me know.

I will see if I can post it on the unofficial CLX patches

Peter


On Fri, 20 Jun 2008 20:17:26 -0500, Boian Mitov <mitov at mitov.com> wrote:

>     Hi Peter,
>
> I thought you ware part of the FreePascal team. If you don't have access  
> to FTP, please let me know, and I will set account for you on one of my  
> servers. I also believe the fix is important and should find its way to  
> the Project at some point.
> Thank you for your efforts!
>
>   With best regards,
>     Boian Mitov
>
> --------------------------------------------------------------------
> Mitov Software
> http://www.mitov.com
> --------------------------------------------------------------------
>
>
> ----- Original Message ----- From: "Peter Popov" <ppopov at tamu.edu>
> To: "FPC developers' list" <fpc-devel at lists.freepascal.org>
> Sent: Friday, June 20, 2008 6:10 PM
> Subject: Re: [fpc-devel] semaphores and mutes
>
>
>> Where do you want me to post it?
>> Peter
>>
>> On Fri, 20 Jun 2008 17:37:58 -0500, Boian Mitov <mitov at mitov.com> wrote:
>>
>>>    Hi Peter,
>>>
>>> Thank you!
>>> I am already working to implement the Semaphores, and Mutexes.
>>> I need timeout. Can you please post the patch? This is actually very  
>>> important issue, as the libraries use threads extensively, and share  
>>> huge number of resources. The timeouts are needed to resolve deadlocks.
>>>
>>>   With best regards,
>>>     Boian Mitov
>>>
>>> --------------------------------------------------------------------
>>> Mitov Software
>>> http://www.mitov.com
>>> --------------------------------------------------------------------
>>>
>>>
>>> ----- Original Message ----- From: "Peter Popov" <ppopov at tamu.edu>
>>> To: "FPC developers' list" <fpc-devel at lists.freepascal.org>
>>> Sent: Friday, June 20, 2008 3:32 PM
>>> Subject: Re: [fpc-devel] semaphores and mutes
>>>
>>>
>>>> Anyways, some time ago I debuged the issue and patched kylix's  
>>>> SynObjs unit to cure that. Basically, the problem is, as expected,  
>>>> glibc. Older version did not have sem_timedwait() implemented. Later  
>>>> glibc included it, along with several new variants of the remaining  
>>>> semaphore routines. So, based on what thread model is used  
>>>> (LinuxThreads or NTPL) each semaphore routine is implemented several  
>>>> times. The thing is a total mess. Anyways, if one explicitly  
>>>> instructs the kylix linker which version of semaphore functions to  
>>>> use (they have to be consistent) TEvent.WaitFor can be implemnted for  
>>>> any timeout. If there is interest I can post the patch.
>>>>
>>>
>>> _______________________________________________
>>> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
>>> http://lists.freepascal.org/mailman/listinfo/fpc-devel
>>
>>
>>
>> -- |***********************************************|
>> |                                               |
>> |  Peter Popov,                                 |
>> |                                               |
>> |  608L Blocker Bldg.                           |
>> |  Institute for Scientific Computation,        |
>> |  Texas A&M University                         |
>> |  College Station, Texas 77843-3404            |
>> |-----------------------------------------------|
>> |  Phone: +1 (979) 458-4644,                    |
>> |  Fax: +1 (979) 845-5827                       |
>> |                                               |
>> |***********************************************|
>> _______________________________________________
>> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
>> http://lists.freepascal.org/mailman/listinfo/fpc-devel
>
> _______________________________________________
> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-devel



-- 
|***********************************************|
|                                               |
|  Peter Popov,                                 |
|                                               |
|  608L Blocker Bldg.                           |
|  Institute for Scientific Computation,        |
|  Texas A&M University                         |
|  College Station, Texas 77843-3404            |
|-----------------------------------------------|
|  Phone: +1 (979) 458-4644,                    |
|  Fax: +1 (979) 845-5827                       |
|                                               |
|***********************************************|