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SubjectRe: [PATCH] posix timers using == instead of & for bitmask tests
>  Thanks for answering my mistaken impressions.  I saw after I wrote that
> SIGEV_SIGNAL == 0 which makes everything work. And I was laboring under
> the misconception that SIGEV_SIGNAL and SIGEV_THREAD were mutually exclusive
> which isn't true, one always has SIGEV_SIGNAL if SIGEV_THREAD is set.

In the semantic sense they are mutually exclusive. They are not so in the
bitwise sense, because the value is really not a bitmask overall, only the
SIGEV_THREAD_ID bit is used that way.

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