Initial Vexta Core v0.1.0 release

src/interfaces/handler.h

@@ -0,0 +1,40 @@
+// Copyright (c) 2018-2020 The Bitcoin Core developers
+// Copyright (c) 2018-2020 The DigiByte Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef DIGIBYTE_INTERFACES_HANDLER_H
+#define DIGIBYTE_INTERFACES_HANDLER_H
+
+#include <functional>
+#include <memory>
+
+namespace boost {
+namespace signals2 {
+class connection;
+} // namespace signals2
+} // namespace boost
+
+namespace interfaces {
+
+//! Generic interface for managing an event handler or callback function
+//! registered with another interface. Has a single disconnect method to cancel
+//! the registration and prevent any future notifications.
+class Handler
+{
+public:
+    virtual ~Handler() {}
+
+    //! Disconnect the handler.
+    virtual void disconnect() = 0;
+};
+
+//! Return handler wrapping a boost signal connection.
+std::unique_ptr<Handler> MakeHandler(boost::signals2::connection connection);
+
+//! Return handler wrapping a cleanup function.
+std::unique_ptr<Handler> MakeHandler(std::function<void()> cleanup);
+
+} // namespace interfaces
+
+#endif // DIGIBYTE_INTERFACES_HANDLER_H