[fpc-devel] Re: [lazarus] Why TSemaphore not implemented for Win32?

[Felipe Monteiro de Carvalho]

On 10/30/07, 12 12 <xxxiter at rambler.ru> wrote:
> Why  TSemaphore not implemented for Win32?

AFAIK TSemaphore is just an alias to different semaphore names on
different unixes.

So it would never work on Win32 by definition.

> but CreateSemaphore present in Delphi!

No it's not. It's a Windows API. It's not directly connected to Delphi.

Nevertheless, I for one, am interrested in having a cross-platform
semaphores solution. I find them quite useful, specially after having
the theory at the university.

What do others think about how such functionality could be implemented?

We could write a procedural interface with some functions like
CreateSemaphore, OpenSemaphore, CloseSemaphore, etc. Also the 2
classical operations P and V (I don't remember the descriptive names
for them)

And TSemaphore could be the handle passed by such functions, or a new
type could be created to avoid confusion.

Ah, by the way, I am moving this discussion to fpc-devel, since it's
more appropriate here.

thanks,
-- 
Felipe Monteiro de Carvalho