Bitcoin Core  0.19.99
P2P Digital Currency
winshutdownmonitor.cpp
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1 // Copyright (c) 2014-2019 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 
6 
7 #if defined(Q_OS_WIN)
8 #include <shutdown.h>
9 
10 #include <windows.h>
11 
12 #include <QDebug>
13 
14 // If we don't want a message to be processed by Qt, return true and set result to
15 // the value that the window procedure should return. Otherwise return false.
16 bool WinShutdownMonitor::nativeEventFilter(const QByteArray &eventType, void *pMessage, long *pnResult)
17 {
18  Q_UNUSED(eventType);
19 
20  MSG *pMsg = static_cast<MSG *>(pMessage);
21 
22  switch(pMsg->message)
23  {
24  case WM_QUERYENDSESSION:
25  {
26  // Initiate a client shutdown after receiving a WM_QUERYENDSESSION and block
27  // Windows session end until we have finished client shutdown.
28  StartShutdown();
29  *pnResult = FALSE;
30  return true;
31  }
32 
33  case WM_ENDSESSION:
34  {
35  *pnResult = FALSE;
36  return true;
37  }
38  }
39 
40  return false;
41 }
42 
43 void WinShutdownMonitor::registerShutdownBlockReason(const QString& strReason, const HWND& mainWinId)
44 {
45  typedef BOOL (WINAPI *PSHUTDOWNBRCREATE)(HWND, LPCWSTR);
46  PSHUTDOWNBRCREATE shutdownBRCreate = (PSHUTDOWNBRCREATE)GetProcAddress(GetModuleHandleA("User32.dll"), "ShutdownBlockReasonCreate");
47  if (shutdownBRCreate == nullptr) {
48  qWarning() << "registerShutdownBlockReason: GetProcAddress for ShutdownBlockReasonCreate failed";
49  return;
50  }
51 
52  if (shutdownBRCreate(mainWinId, strReason.toStdWString().c_str()))
53  qInfo() << "registerShutdownBlockReason: Successfully registered: " + strReason;
54  else
55  qWarning() << "registerShutdownBlockReason: Failed to register: " + strReason;
56 }
57 #endif
void StartShutdown()
Definition: shutdown.cpp:12