Benchmark refactoring, zero delay submit and unified HTTP layer.

src/base/io/Async.h

@@ -25,6 +25,9 @@
 #include "base/tools/Object.h"
 
 
+#include <functional>
+
+
 namespace xmrig {
 
 
@@ -37,6 +40,9 @@ class Async
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(Async)
 
+    using Callback = std::function<void()>;
+
+    Async(Callback callback);
     Async(IAsyncListener *listener);
     ~Async();