wake_up_interruptible

wake_up_interruptible

[Fundu]

Hi,

what happen when you call wake_up_interruptible and there are no task waiting on that wait queue right then. 

But say after some time a task comes along and start waiting (after the wake_up_interruptible is called). 
Would that task be not wait at all because there was a pending wake up

What i'm looking for is a mechanism where by any old wake if not acted upon are lost. so in the above mention case if a task come along and waits after a wake has been sent, it continues to wait until a next wake up is sent.

feel free to ask me if there is some more clarification required.

TIA

fundu 



      
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Re: wake_up_interruptible

[Michał Nazarewicz]

On Tue, 11 May 2010 22:32:46 +0200, Fundu <fundu_1999@yahoo.com> wrote:
> what happen when you call wake_up_interruptible and there are no task waiting on that wait queue right then.
>
> But say after some time a task comes along and start waiting (after the wake_up_interruptible is called).
> Would that task be not wait at all because there was a pending wake up

It will be waiting for another wake up.

> What i'm looking for is a mechanism where by any old wake if not acted upon are lost.

Semahore may be a good option.

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