Re: Man page for revised timerfd API

[Davide Libenzi <davidel@xmailserver.org>]

On Thu, 27 Sep 2007, Michael Kerrisk wrote:

> Davide,
> 
> A further question: what is the expected behavior in the
> following scenario:
> 
> 1. Create a timerfd and arm it.
> 2. Wait until M timer expirations have occurred
> 3. Modify the settings of the timer
> 4. Wait for N further timer expirations have occurred
> 5. read() from the timerfd
> 
> Does the buffer returned by the read() contain the value
> N or (M+N)?  In other words, should modifying the timer
> settings reset the expiration count to zero?

Every timerfd_settime() zeroes the tick counter. So in your scenario it'll 
return N.



- Davide


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