New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/base/thread_pool.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <functional>
+
+namespace threads
+{
+class IRoutine;
+class Thread;
+}  // namespace threads
+
+namespace base
+{
+
+class ThreadPool
+{
+public:
+  typedef std::function<void (threads::IRoutine *)> TFinishRoutineFn;
+
+  ThreadPool(size_t size, const TFinishRoutineFn & finishFn);
+  ~ThreadPool();
+
+  // ThreadPool will not delete routine. You can delete it in TFinishRoutineFn.
+  void PushBack(threads::IRoutine * routine);
+  void PushFront(threads::IRoutine * routine);
+
+  // - calls Cancel for the current processing routines
+  // - joins threads
+  // - calls Cancel for the remains routines in queue
+  void Stop();
+
+private:
+  class Impl;
+  Impl * m_impl;
+};
+
+} // namespace base