1  // Copyright (c) 2021-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <interfaces/echo.h>
 6  #include <interfaces/handler.h>
 7  
 8  #include <boost/signals2/connection.hpp>
 9  #include <memory>
10  #include <utility>
11  
12  namespace common {
13  namespace {
14  class CleanupHandler : public interfaces::Handler
15  {
16  public:
17      explicit CleanupHandler(std::function<void()> cleanup) : m_cleanup(std::move(cleanup)) {}
18      ~CleanupHandler() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
19      void disconnect() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
20      std::function<void()> m_cleanup;
21  };
22  
23  class SignalHandler : public interfaces::Handler
24  {
25  public:
26      explicit SignalHandler(boost::signals2::connection connection) : m_connection(std::move(connection)) {}
27  
28      void disconnect() override { m_connection.disconnect(); }
29  
30      boost::signals2::scoped_connection m_connection;
31  };
32  
33  class EchoImpl : public interfaces::Echo
34  {
35  public:
36      std::string echo(const std::string& echo) override { return echo; }
37  };
38  } // namespace
39  } // namespace common
40  
41  namespace interfaces {
42  std::unique_ptr<Handler> MakeCleanupHandler(std::function<void()> cleanup)
43  {
44      return std::make_unique<common::CleanupHandler>(std::move(cleanup));
45  }
46  
47  std::unique_ptr<Handler> MakeSignalHandler(boost::signals2::connection connection)
48  {
49      return std::make_unique<common::SignalHandler>(std::move(connection));
50  }
51  
52  std::unique_ptr<Echo> MakeEcho() { return std::make_unique<common::EchoImpl>(); }
53  } // namespace interfaces