Semaphores in .NET compact framework

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+3 Q:

Semaphores in .NET compact framework

Unfortunately, there is no Semaphore in System.Threading when using the .NET Compact Framework. I'm not sure why that is, does anyone have an idea?

After googling I've found a bunch of people giving their own implementations, but none of them really worked great... or at all!

So I've come to ask the experts...

Does anyone have a good semaphore class/library they can recommend for the .NET compact framework?

Is there someway I can emulate the behaviour?

I have a typical producer/consumer setup in which a thread pushes objects on to a Queue (System.Collections). I then want a consumer thread to pull objects off the queue and do work, but obviously only when there are things on the queue to work with!

I am working in C#, but I'll take solutions/pseudo in any language so long as I can implement it on .NET CF.

+4 A:

You can just PInvoke to CreateSemaphore and ReleaseSemaphore- they're implemented on CE in coredll. Pretty easy to write a nice managed wrapper that looks like System.Threading.Semaphore.

nitzmahone 2009-11-17 07:12:21

I was wondering if that's the best way. Thanks for your response

Fuzz 2009-11-17 10:26:26

+2 A:

I think there is a semaphore implementation in OpenNETCF

Quibblesome 2009-11-19 15:50:16

so there is.... :-)I'm still at a loss as to why it hasn't been includedSure there was lots missing from .NET CF 1.0, but we're up to 3.5 and still no semaphore. Semaphore's are a fairly core inter-process communications device.

Fuzz 2009-11-20 13:54:03

TELL ME ABOUT IT. M$ obviously don't care about CF or are planning to replace WinCE/CF with something else. That is the only reasoning I can come up with. The package size argument is silly as devices have more space these days and they could always have a "fuller" version or release these kind of libraries as add ons.

Quibblesome 2009-11-20 14:41:14

I agree. CF has been sorely neglected. OpenNETCF is the BEST.

0A0D 2009-11-23 14:58:07

ansaurus

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Semaphores in .NET compact framework

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