New cpp folder structure

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

libs/base/task_loop.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <cstdint>
+#include <functional>
+
+namespace base
+{
+class TaskLoop
+{
+public:
+  using Task = std::function<void()>;
+  using TaskId = uint64_t;
+
+  static TaskId constexpr kNoId = 0;
+
+  struct PushResult
+  {
+    // Contains true when task is posted successfully.
+    bool m_isSuccess = false;
+    // Contains id of posted task which can be used to access the task to cancel/suspend/etc it.
+    // kNoId is returned for tasks that cannot be accessed.
+    TaskId m_id = kNoId;
+  };
+
+  virtual ~TaskLoop() = default;
+
+  virtual PushResult Push(Task && task) = 0;
+  virtual PushResult Push(Task const & task) = 0;
+};
+}  // namespace base