Use two argument condition_variable::wait() instead of a loop.

Author: wilx

ThreadPool.h

@@ -44,8 +44,8 @@ inline ThreadPool::ThreadPool(size_t threads)
 
                     {
                         std::unique_lock<std::mutex> lock(this->queue_mutex);
-                        while(!this->stop && this->tasks.empty())
-                            this->condition.wait(lock);
+                        this->condition.wait(lock,
+                            [this]{ return this->stop || !this->tasks.empty(); });
                         if(this->stop && this->tasks.empty())
                             return;
                         task = std::move(this->tasks.front());