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Re: cyg_thread_resume question


Hi,
	Cyg_Thread::suspend_count will never become negative. Because if
Cyg_Thread::suspend_count is greater than zero only,
Cyg_Thread::resume will decrement Cyg_Thread::suspend_count. 

reji



On Thu, 3 Jul 2003, mohanlal jangir wrote:

> I have a question regarding following lines from eCos reference guide:
> "cyg_thread_suspend can be used to increment the suspend counter, and
> cyg_thread_resume decrements it. The scheduler will never run a thread with
> a non-zero suspend counter"
> 
> Does it mean that resuming a thread without varify if it is sleeping or not
> can lead the thread to be non-runnable? For example a thread X is in ready
> state but not getting executed because some higher priority thread Y is
> running. Now thread Y calls cyg_thread_resume(X). This will decrement the
> suspend counter of thread X, which was already zero. Will the thread X now
> ever run?
> 
> Regards
> Mohanlal
> 
> -- 
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> 
> 


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