1  // Copyright (c) 2014-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  #ifndef BITCOIN_QT_WINSHUTDOWNMONITOR_H
 6  #define BITCOIN_QT_WINSHUTDOWNMONITOR_H
 7  
 8  #ifdef WIN32
 9  #include <QByteArray>
10  #include <QString>
11  #include <functional>
12  
13  #include <windows.h>
14  
15  #include <QAbstractNativeEventFilter>
16  
17  class WinShutdownMonitor : public QAbstractNativeEventFilter
18  {
19  public:
20      WinShutdownMonitor(std::function<void()> shutdown_fn) : m_shutdown_fn{std::move(shutdown_fn)} {}
21  
22      /** Implements QAbstractNativeEventFilter interface for processing Windows messages */
23      bool nativeEventFilter(const QByteArray &eventType, void *pMessage, qintptr *pnResult) override;
24  
25      /** Register the reason for blocking shutdown on Windows to allow clean client exit */
26      static void registerShutdownBlockReason(const QString& strReason, const HWND& mainWinId);
27  
28  private:
29      std::function<void()> m_shutdown_fn;
30  };
31  #endif
32  
33  #endif // BITCOIN_QT_WINSHUTDOWNMONITOR_H