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Fix the thread safety of RunCallback #191

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Fix the thread safety of RunCallback #191

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10 changes: 4 additions & 6 deletions include/ps/kv_app.h
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Original file line number Diff line number Diff line change
Expand Up @@ -640,18 +640,16 @@ void KVWorker<Val>::Process(const Message& msg) {
}
template <typename Val>
void KVWorker<Val>::RunCallback(int timestamp) {
Callback cb = nullptr;
mu_.lock();
auto it = callbacks_.find(timestamp);
if (it != callbacks_.end()) {
mu_.unlock();

CHECK(it->second);
it->second();

mu_.lock();
cb = it->second;
CHECK(cb);
callbacks_.erase(it);
}
mu_.unlock();
if (cb) cb();
}

template <typename Val>
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