Boost logo

Boost :

From: Giovanni Piero Deretta (gpderetta_at_[hidden])
Date: 2008-09-01 13:50:40

On Mon, Sep 1, 2008 at 7:44 PM, Stjepan Rajko <stipe_at_[hidden]> wrote:
> On Mon, Sep 1, 2008 at 9:35 AM, Giovanni Piero Deretta
> <gpderetta_at_[hidden]> wrote:
>> On Mon, Sep 1, 2008 at 7:19 AM, Jaakko Järvi <jarvi_at_[hidden]> wrote:
>>> The review of Stjepan Rajko's Dataflow library starts today, September 1st,
>>> and will run until September 10th.
>> Hi, while skimming through the Dataflow documentation, I noticed an
>> error in the distributed example (
> Thanks for raising this issue - threading is definitely not my forte,
> and it's quite possible that I'm doing something weird. I see,
> looking at the docs:
> template <typename ScopedLock>
> void wait(ScopedLock& lock);
> Danger: This version should always be used within a loop checking that
> the state logically associated with the condition has become true.
> Without the loop, race conditions can ensue due to possible "spurious
> wake ups".
> I wasn't aware of the "spurious wake ups" issue. I will fix the code
> as you recommended.

Spurious wakeups are rare in practice. OTOH, what is more likely to
happen is that the main thread could miss the wake-up if the worker
thread managed to signal the condition variable before the main thread
got to wait for it (remember that condition variables are stateless).



Boost list run by bdawes at, gregod at, cpdaniel at, john at