[Lazarus] Anyone using LCLIntf critical section routines?

[Boian Mitov]

      Hi Felipe,

We use them for code compatibility with Delphi. Windows threads do not 
tolerate non "cdecl" Delphi calling conventions insade them, so we are 
forced to use Win32 API critical sections to work around this problem. We 
have not tested enough yet to see if the same problem exists in Lazarus. If 
the problem is confirmed the CriticalSection Enter/Leave routines may have 
to be changed to be "cdecl" (at least under Windows) for Windows system 
threads compatibility. Becouse of this problem I have seen number of Delphi 
libraryes use Win32 API CriticalSection routines instead of the SyncObjs 
object. If you decide the functions are not needed, we can create our own 
CriticalSection wrapper, and call the Win32 API when using Delphi and the 
TCriticalSection from SyncObjs in Lazarus. You may however still consider 
keeping them for making it easier for other developers to port from existing 
Delphi code.

I must admit however that there are not so many heavily threaded 
applications and libraries. The only ones I have seen having this "cdecl" 
problem are multimedia (both DirectShow and VFW) calls and the 
"timeSetEvent" timers. This probably will have relatively small effect on 
the overall number of libraries and Delphi applications, so you can probably 
safely remove it, with limited effect. I don't have any serious objections, 
and if you plan the removal will start modifying our code to use our own 
wrapper.

  With best regards,
    Boian Mitov

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----- Original Message ----- 
From: "Felipe Monteiro de Carvalho" <felipemonteiro.carvalho at gmail.com>
To: "General mailing list" <lazarus at lazarus.freepascal.org>
Sent: Sunday, June 22, 2008 11:35 AM
Subject: [Lazarus] Anyone using LCLIntf critical section routines?


> Hello,
>
> We are considering removing the critical section routines in LCLIntf,
> because there is already a TCriticalSection in the RTL in the SyncObjs
> unit.
>
> If noone objects, and proves that those routines are useful for
> something in 1 week, we will remove them.
>
> thanks,
> -- 
> Felipe Monteiro de Carvalho
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