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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
#include "precomp.h"
#define BURN_UITHREAD_CLASS_WINDOW L"WixBurnMessageWindow"
// structs
struct UITHREAD_CONTEXT
{
HANDLE hInitializedEvent;
HINSTANCE hInstance;
BURN_ENGINE_STATE* pEngineState;
};
struct UITHREAD_INFO
{
BOOL fElevatedEngine;
BURN_ENGINE_STATE* pEngineState;
};
// internal function declarations
static DWORD WINAPI ThreadProc(
__in LPVOID pvContext
);
static LRESULT CALLBACK WndProc(
__in HWND hWnd,
__in UINT uMsg,
__in WPARAM wParam,
__in LPARAM lParam
);
// function definitions
HRESULT UiCreateMessageWindow(
__in HINSTANCE hInstance,
__in BURN_ENGINE_STATE* pEngineState
)
{
HRESULT hr = S_OK;
HANDLE rgWaitHandles[2] = { };
UITHREAD_CONTEXT context = { };
// Create event to signal after the UI thread / window is initialized.
rgWaitHandles[0] = ::CreateEventW(NULL, TRUE, FALSE, NULL);
ExitOnNullWithLastError(rgWaitHandles[0], hr, "Failed to create initialization event.");
// Pass necessary information to create the window.
context.hInitializedEvent = rgWaitHandles[0];
context.hInstance = hInstance;
context.pEngineState = pEngineState;
// Create our separate UI thread.
rgWaitHandles[1] = ::CreateThread(NULL, 0, ThreadProc, &context, 0, NULL);
ExitOnNullWithLastError(rgWaitHandles[1], hr, "Failed to create the UI thread.");
// Wait for either the thread to be initialized or the window to exit / fail prematurely.
::WaitForMultipleObjects(countof(rgWaitHandles), rgWaitHandles, FALSE, INFINITE);
pEngineState->hMessageWindowThread = rgWaitHandles[1];
rgWaitHandles[1] = NULL;
LExit:
ReleaseHandle(rgWaitHandles[1]);
ReleaseHandle(rgWaitHandles[0]);
return hr;
}
void UiCloseMessageWindow(
__in BURN_ENGINE_STATE* pEngineState
)
{
if (::IsWindow(pEngineState->hMessageWindow))
{
::PostMessageW(pEngineState->hMessageWindow, WM_CLOSE, 0, 0);
// Give the window 15 seconds to close because if it stays open it can prevent
// the engine from starting a reboot (should a reboot actually be necessary).
::WaitForSingleObject(pEngineState->hMessageWindowThread, 15 * 1000);
}
}
// internal function definitions
static DWORD WINAPI ThreadProc(
__in LPVOID pvContext
)
{
HRESULT hr = S_OK;
UITHREAD_CONTEXT* pContext = static_cast<UITHREAD_CONTEXT*>(pvContext);
UITHREAD_INFO info = { };
WNDCLASSW wc = { };
BOOL fRegistered = FALSE;
HWND hWnd = NULL;
BOOL fRet = FALSE;
MSG msg = { };
BURN_ENGINE_STATE* pEngineState = pContext->pEngineState;
BOOL fElevatedEngine = BURN_MODE_ELEVATED == pContext->pEngineState->internalCommand.mode;
wc.lpfnWndProc = WndProc;
wc.hInstance = pContext->hInstance;
wc.lpszClassName = BURN_UITHREAD_CLASS_WINDOW;
if (!::RegisterClassW(&wc))
{
ExitWithLastError(hr, "Failed to register window.");
}
fRegistered = TRUE;
info.fElevatedEngine = fElevatedEngine;
info.pEngineState = pEngineState;
// Create the window to handle reboots without activating it.
hWnd = ::CreateWindowExW(WS_EX_NOACTIVATE, wc.lpszClassName, NULL, WS_POPUP, 0, 0, 0, 0, HWND_DESKTOP, NULL, pContext->hInstance, &info);
ExitOnNullWithLastError(hWnd, hr, "Failed to create window.");
::ShowWindow(hWnd, SW_SHOWNA);
// Persist the window handle and let the caller know we've initialized.
pEngineState->hMessageWindow = hWnd;
::SetEvent(pContext->hInitializedEvent);
// Pump messages until the window is closed.
while (0 != (fRet = ::GetMessageW(&msg, NULL, 0, 0)))
{
if (-1 == fRet)
{
hr = E_UNEXPECTED;
ExitOnFailure(hr, "Unexpected return value from message pump.");
}
else if (!::IsDialogMessageW(msg.hwnd, &msg))
{
::TranslateMessage(&msg);
::DispatchMessageW(&msg);
}
}
LExit:
if (fRegistered)
{
::UnregisterClassW(BURN_UITHREAD_CLASS_WINDOW, pContext->hInstance);
}
return hr;
}
static LRESULT CALLBACK WndProc(
__in HWND hWnd,
__in UINT uMsg,
__in WPARAM wParam,
__in LPARAM lParam
)
{
switch (uMsg)
{
case WM_NCCREATE:
{
LPCREATESTRUCTW lpcs = reinterpret_cast<LPCREATESTRUCTW>(lParam);
::SetWindowLongPtrW(hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(lpcs->lpCreateParams));
break;
}
case WM_NCDESTROY:
{
LRESULT lRes = ::DefWindowProcW(hWnd, uMsg, wParam, lParam);
::SetWindowLongPtrW(hWnd, GWLP_USERDATA, 0);
return lRes;
}
case WM_QUERYENDSESSION:
{
DWORD dwEndSession = static_cast<DWORD>(lParam);
BOOL fCritical = ENDSESSION_CRITICAL & dwEndSession;
BOOL fCancel = FALSE;
BOOL fRet = FALSE;
// Always block shutdown during apply.
UITHREAD_INFO* pInfo = reinterpret_cast<UITHREAD_INFO*>(::GetWindowLongPtrW(hWnd, GWLP_USERDATA));
if (pInfo->pEngineState->plan.fApplying)
{
fCancel = TRUE;
}
pInfo->pEngineState->fCriticalShutdownInitiated |= fCritical;
fRet = !fCancel;
LogId(REPORT_STANDARD, MSG_SYSTEM_SHUTDOWN, LoggingBoolToString(fCritical), LoggingBoolToString(pInfo->fElevatedEngine), LoggingBoolToString(fRet));
return fRet;
}
case WM_DESTROY:
::PostQuitMessage(0);
return 0;
}
return ::DefWindowProcW(hWnd, uMsg, wParam, lParam);
}
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