max time threads
in [Python]
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From: MRAB on 18 Jun 2010 19:45 pacopyc wrote: > On 19 Giu, 00:27, MRAB <pyt...(a)mrabarnett.plus.com> wrote: >> pacopyc wrote: >> >> [snip] >>> Ok, the problem is that I want fix a time max for each thread. For >>> example run 10 threads (each can terminate its work in 10 sec. max >>> fixed time) and wait them. If they finish its work in < 10 sec. (for >>> example 2 sec.) very good ... go on immediately (don't wait >>> unnecessary time), but if a thread use more than 10 sec. stop wait (I >>> kill it) .... when all threads have finished their work or when they >>> have used all their available time (10 sec.) the program must go on >>> (don't wait). >> It's not possible to kill a thread. If you want a thread to have a >> maximum time, the thread must check occasionally how long it has been >> running and terminate if necessary. >> >> Another programming language (Java) originally had the ability to kill >> threads, but that was later deprecated because it caused problems due to >> not knowing what the thread was doing when it was killed (it might have >> been in the middle of updating something at the time, for example, >> leaving the system in an inconsistent state). > > Ok, I understand. But is possible fix max wait time (for example 60 > sec.) in main thread and check queue for task done and at the same > time the remaining time. When all task have done or wait time has > expired main thread go on. Is it possible? Can you write code? > Thank you very much. The documentation says that queue.join() can't have a timeout, so you might have to think of another way to achieve the same effect. You could, for example, have a results queue into which a thread puts something to indicate when it has finished, and then use the .get method on it in the main thread (the .get method can have a timeout). |