On Fri, Apr 1, 2011 at 10:05 PM, Jeff King <peff@xxxxxxxx> wrote:
> On Fri, Apr 01, 2011 at 09:57:14PM +0200, Erik Faye-Lund wrote:
>
>> > But this does not help the case at hand in any way. How would you interrupt a
>> > thread that is blocked in ReadFile()? The point of pthread_cancel() is that
>> > it interrupts blocked system calls
>>
>> There is no mention of such a guarantee in POSIX (section 2.9.5 Thread
>> Cancellation), so relying on that is undefined behavior.
>
> Eh? My pthreads(7) says that read() is required to be a cancellation
> point acrroding to POSIX. I didn't dig up the actual reference in the
> standard, though.
I don't understand where the implementor would get that from after
reading through it, but if there's something I've missed we can fix it
by replacing my pthread_cancel with this, no?
static inline int pthread_cancel(pthread_t thread)
{
SetEvent(thread.cancel_event);
CancelSynchronousIo(thread.handle);
}
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