Revision control
++ // Copyright (C) 2022 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #include "qfunctions_win_p.h"
++
++ #include <QtCore/qdebug.h>
++
++ #include <combaseapi.h>
++ #include <objbase.h>
++
++ #if __has_include(<appmodel.h>)
++ # include <appmodel.h>
++ # define HAS_APPMODEL
++ #endif
++
++ QT_BEGIN_NAMESPACE
++
++ QComHelper::QComHelper(COINIT concurrencyModel)
++ {
++ // Avoid overhead of initializing and using obsolete technology
++ concurrencyModel = COINIT(concurrencyModel | COINIT_DISABLE_OLE1DDE);
++
++ m_initResult = CoInitializeEx(nullptr, concurrencyModel);
++
++ if (FAILED(m_initResult))
++ qErrnoWarning(m_initResult, "Failed to initialize COM library");
++ }
++
++ QComHelper::~QComHelper()
++ {
++ Q_ASSERT(m_threadId == GetCurrentThreadId());
++ if (SUCCEEDED(m_initResult))
++ CoUninitialize();
++ }
++
++ /*!
++ \internal
++ Make sure the COM library is is initialized on current thread.
++
++ Initializes COM as a single-threaded apartment on this thread and
++ ensures that CoUninitialize will be called on the same thread when
++ the thread exits. Note that the last call to CoUninitialize on the
++ main thread will always be made during destruction of static
++ variables at process exit.
++ */
++ void qt_win_ensureComInitializedOnThisThread()
++ {
++ static thread_local QComHelper s_comHelper;
++ }
++
++ /*!
++ \internal
++ Checks if the application has a \e{package identity}
++
++ Having a \e{package identity} is required to use many modern
++ Windows APIs.
++
++ */
++ bool qt_win_hasPackageIdentity()
++ {
++ #if defined(HAS_APPMODEL)
++ static const bool hasPackageIdentity = []() {
++ UINT32 length = 0;
++ switch (const auto result = GetCurrentPackageFullName(&length, nullptr)) {
++ case ERROR_INSUFFICIENT_BUFFER:
++ return true;
++ case APPMODEL_ERROR_NO_PACKAGE:
++ return false;
++ default:
++ qWarning("Failed to resolve package identity (error code %ld)", result);
++ return false;
++ }
++ }();
++ return hasPackageIdentity;
++ #else
++ return false;
++ #endif
++ }
++
++ QT_END_NAMESPACE