pthreads: shouldn't nanosleep() be a cancellation point ?

Poul-Henning Kamp phk at
Tue Aug 2 14:06:59 GMT 2005

In message <Pine.GSO.4.43.0508020954480.5408-100000 at>, Daniel Eisc
hen writes:
>On Tue, 2 Aug 2005, Poul-Henning Kamp wrote:
>> Since sleep() is a cancellation point, shouldn't nanosleep() be as well ?
>nanosleep() is a cancellation point.  At least, that's the way it's
>coded and should work.  Note that _nanosleep() isn't.  By design, if
>libc is using _nanosleep() in places, then that wouldn't cause a
>cancellation point.
>> (this would also cover usleep())
>Hmm, is your real complaint that usleep() is not a cancellation point?
>usleep() should be a cancellation point, so you can fix it if you
>want (s/_nano/nano/ and remove the namespace stuff).

Right I was surprised that usleep() wasn't a cancellation point,
I'm not sure I have a drivers license good for the namespace stuff...

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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