Re: [Boost-users] [thread] Is a call to interrupt_all blocking?

Subject: Re: [Boost-users] [thread] Is a call to interrupt_all blocking?
From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2010-01-26 05:52:08

Sachin Garg <schngrg_at_[hidden]> writes:

> Does a call to interrupt_all blocks the calling thread, waiting for all threads
> to be interrupted? Or is it supposed to return immediately and let the threads
> hit their interruption points later?

interrupt_all is not blocking. However, there is currently a bug in
interruption on pthreads which means threads can miss interruptions if
they get a spurious condition variable wake at the wrong time. Since
interruption causes spurious wakes for other threads waiting on the same
cv this is particularly a problem for interrupt_all.

Anthony
-- 
Author of C++ Concurrency in Action     http://www.stdthread.co.uk/book/
just::thread C++0x thread library             http://www.stdthread.co.uk
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