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event/Loop: combine multiple WakeFD::Write() calls

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Reduce DeferredMonitor overhead.
This commit is contained in:
Max Kellermann 2014-01-05 01:50:25 +01:00
parent e9d764d7ad
commit da9e584921
1 changed files with 6 additions and 1 deletions
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7
src/event/Loop.cxx
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@ -207,11 +207,16 @@ EventLoop::AddDeferred(DeferredMonitor &d)
assert(std::find(deferred.begin(), assert(std::find(deferred.begin(),
deferred.end(), &d) == deferred.end()); deferred.end(), &d) == deferred.end());
/* we don't need to wake up the EventLoop if another
DeferredMonitor has already done it */
const bool must_wake = deferred.empty();
d.pending = true; d.pending = true;
deferred.push_back(&d); deferred.push_back(&d);
mutex.unlock(); mutex.unlock();
wake_fd.Write(); if (must_wake)
wake_fd.Write();
} }
void void