kern/33951: pthread_cancel is ignored

[Daniel Eischen]

On Tue, 10 Feb 2004, David Xu wrote:

> Daniel Eischen wrote:
> 
> >Synopsis: pthread_cancel is ignored
> >
> >State-Changed-From-To: open->closed
> >State-Changed-By: deischen
> >State-Changed-When: Mon Feb 9 21:30:56 PST 2004
> >State-Changed-Why: 
> >This works under -current with libpthread and supposedly
> >under -stable with -lc_r.
> >
> >http://www.freebsd.org/cgi/query-pr.cgi?pr=33951
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> >
> >  
> >
> I had enabled asynchornous cancelling for M:N thread in libkse but not 
> 1:1 thread,
> simplest way to support asynchronous cancelling for 1:1 is to use 
> signal, but it will
> occupy a signal like Linux's SIGUSR1, another way is to use upcall,  
> but  it is
> slight complicated.

An upcall would be nice since it wouldn' use a signal.  It could
be treated like a signal where you push it on the thread's stack
but use the upcall function instead of a signal handling function.

-- 
Dan Eischen