1 files changed, 46 insertions, 0 deletions
diff --git a/src/interfaces/handler.cpp b/src/interfaces/handler.cpp
new file mode 100644
index 000000000..95035c1b5
--- /dev/null
+++ b/src/interfaces/handler.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <interfaces/handler.h>
+
+#include <util/memory.h>
+
+#include <boost/signals2/connection.hpp>
+#include <utility>
+
+namespace interfaces {
+namespace {
+
+class HandlerImpl : public Handler
+{
+public:
+    explicit HandlerImpl(boost::signals2::connection connection) : m_connection(std::move(connection)) {}
+
+    void disconnect() override { m_connection.disconnect(); }
+
+    boost::signals2::scoped_connection m_connection;
+};
+
+class CleanupHandler : public Handler
+{
+public:
+    explicit CleanupHandler(std::function<void()> cleanup) : m_cleanup(std::move(cleanup)) {}
+    ~CleanupHandler() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
+    void disconnect() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
+    std::function<void()> m_cleanup;
+};
+
+} // namespace
+
+std::unique_ptr<Handler> MakeHandler(boost::signals2::connection connection)
+{
+    return MakeUnique<HandlerImpl>(std::move(connection));
+}
+
+std::unique_ptr<Handler> MakeHandler(std::function<void()> cleanup)
+{
+    return MakeUnique<CleanupHandler>(std::move(cleanup));
+}
+
+} // namespace interfaces