Questions about timer in multi-threads environment

[longskys]

Hi

I have questions about timer function in multi-threads environment.

My application has multi-threads, in one thread, I set a timer, when the timer expires, the timer function will interrupt other thread and execute.

I am not clear which thread will be interrupted by the timer function ?
Does the thread in which I set the timer be interrupted, or it depends on OS.

If my application is running on one CPU machine, I think the current thread will be interrupted. If the application is running on mult-CPU machine, and SMP is on, which thread will be interrupted.

If the thread I set the timer has finished and gone, when timer expires, what will happen ?


thanks & regards
Jeffrey
06-07-04

[sumitpandya]

See the page
WebSVN - packet-o-matic - Rev 157 - -trunk-src-timers.c

https://svn.tuxicoman.be/filedetails...Ftimers.c&sc=1

Both timer.c and timer.h is complete implementation

[porter]

Originally Posted by longskys

My application has multi-threads, in one thread, I set a timer, when the timer expires, the timer function will interrupt other thread and execute.

(a) what mechanism are you using for timers?

(b) what do you mean by interrupt?

I do hope you are using "pthread_cond_timedwait". From what you say I would suggest you don't need a separate timer thread, you have "other thread" wait on "pthread_cond_timedwait".