70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
// Copyright (c) 2014-2016 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "winshutdownmonitor.h"
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#if defined(Q_OS_WIN) && QT_VERSION >= 0x050000
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#include "init.h"
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#include "util.h"
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#include <windows.h>
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#include <QDebug>
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#include <openssl/rand.h>
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// If we don't want a message to be processed by Qt, return true and set result to
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// the value that the window procedure should return. Otherwise return false.
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bool WinShutdownMonitor::nativeEventFilter(const QByteArray &eventType, void *pMessage, long *pnResult)
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{
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Q_UNUSED(eventType);
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MSG *pMsg = static_cast<MSG *>(pMessage);
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// Seed OpenSSL PRNG with Windows event data (e.g. mouse movements and other user interactions)
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if (RAND_event(pMsg->message, pMsg->wParam, pMsg->lParam) == 0) {
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// Warn only once as this is performance-critical
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static bool warned = false;
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if (!warned) {
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LogPrintf("%s: OpenSSL RAND_event() failed to seed OpenSSL PRNG with enough data.\n", __func__);
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warned = true;
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}
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}
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switch(pMsg->message)
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{
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case WM_QUERYENDSESSION:
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{
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// Initiate a client shutdown after receiving a WM_QUERYENDSESSION and block
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// Windows session end until we have finished client shutdown.
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StartShutdown();
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*pnResult = FALSE;
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return true;
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}
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case WM_ENDSESSION:
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{
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*pnResult = FALSE;
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return true;
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}
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}
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return false;
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}
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void WinShutdownMonitor::registerShutdownBlockReason(const QString& strReason, const HWND& mainWinId)
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{
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typedef BOOL (WINAPI *PSHUTDOWNBRCREATE)(HWND, LPCWSTR);
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PSHUTDOWNBRCREATE shutdownBRCreate = (PSHUTDOWNBRCREATE)GetProcAddress(GetModuleHandleA("User32.dll"), "ShutdownBlockReasonCreate");
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if (shutdownBRCreate == NULL) {
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qWarning() << "registerShutdownBlockReason: GetProcAddress for ShutdownBlockReasonCreate failed";
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return;
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}
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if (shutdownBRCreate(mainWinId, strReason.toStdWString().c_str()))
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qWarning() << "registerShutdownBlockReason: Successfully registered: " + strReason;
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else
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qWarning() << "registerShutdownBlockReason: Failed to register: " + strReason;
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}
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#endif
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