sem_trywait returns EAGAIN (rather than returning -1 and setting errno)

[Robert Collins]

FWIW, I've patched sem_trywait and sem_wait. I haven't looked for further cases of misbehaviour though.

Rob

> -----Original Message-----
> From: Christopher Faylor [mailto:cgf@redhat.com] 

> As Robert indicated, in the vast majority of those cases, 
> this was, in fact, the right thing to do.
> 
> It's apparently not the right thing to do in the case of 
> sem_trywait, so a patch will be required:  
> http://cygwin.com/contrib.html .


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