recvfrom() not a thread cancellation point

[Niall Douglas]

On 31 Mar 2006 at 15:40, Daniel Eischen wrote:

> > How do I receive UDP packets using recvfrom() when it would seem that
> > recvfrom() is not a thread cancellation point on FreeBSD 6.0?
> 
> 1) select() or poll() instead, then recvfrom().  UDP packets
>    are never partial IIRC.

Ah, that's a good idea.

> 2) Unmask a signal in the thread doing the recvfrom(), then
>    use pthread_kill() to interrupt it (don't use SA_RESTART
>    for sa_flags in the signal action).

Not practical unfortunately as who knows how many threads are 
concurrently doing recvfrom()'s.

Thanks for the hint. I hadn't thought of using poll.

Cheers,
Niall