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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFUNCTIONS_WINRT_P_H
#define QFUNCTIONS_WINRT_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qglobal.h>
#if defined(Q_OS_WIN) && defined(Q_CC_MSVC)
#include <QtCore/QCoreApplication>
#include <QtCore/QThread>
#include <QtCore/QAbstractEventDispatcher>
#include <QtCore/QElapsedTimer>
#include <QtCore/qt_windows.h>
#include <wrl.h>
#include <windows.foundation.h>
// Convenience macros for handling HRESULT values
#define RETURN_IF_FAILED(msg, ret) \
if (FAILED(hr)) { \
qErrnoWarning(hr, msg); \
ret; \
}
#define RETURN_IF_FAILED_WITH_ARGS(msg, ret, ...) \
if (FAILED(hr)) { \
qErrnoWarning(hr, msg, __VA_ARGS__); \
ret; \
}
#define RETURN_HR_IF_FAILED(msg) RETURN_IF_FAILED(msg, return hr)
#define RETURN_OK_IF_FAILED(msg) RETURN_IF_FAILED(msg, return S_OK)
#define RETURN_FALSE_IF_FAILED(msg) RETURN_IF_FAILED(msg, return false)
#define RETURN_VOID_IF_FAILED(msg) RETURN_IF_FAILED(msg, return)
#define RETURN_HR_IF_FAILED_WITH_ARGS(msg, ...) RETURN_IF_FAILED_WITH_ARGS(msg, return hr, __VA_ARGS__)
#define RETURN_OK_IF_FAILED_WITH_ARGS(msg, ...) RETURN_IF_FAILED_WITH_ARGS(msg, return S_OK, __VA_ARGS__)
#define RETURN_FALSE_IF_FAILED_WITH_ARGS(msg, ...) RETURN_IF_FAILED_WITH_ARGS(msg, return false, __VA_ARGS__)
#define RETURN_VOID_IF_FAILED_WITH_ARGS(msg, ...) RETURN_IF_FAILED_WITH_ARGS(msg, return, __VA_ARGS__)
#define Q_ASSERT_SUCCEEDED(hr) \
Q_ASSERT_X(SUCCEEDED(hr), Q_FUNC_INFO, qPrintable(qt_error_string(hr)));
QT_BEGIN_NAMESPACE
namespace QWinRTFunctions {
// Synchronization methods
enum AwaitStyle
{
YieldThread = 0,
ProcessThreadEvents = 1,
ProcessMainThreadEvents = 2
};
template <typename T>
static inline HRESULT _await_impl(const Microsoft::WRL::ComPtr<T> &asyncOp, AwaitStyle awaitStyle, uint timeout)
{
Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncInfo> asyncInfo;
HRESULT hr = asyncOp.As(&asyncInfo);
if (FAILED(hr))
return hr;
AsyncStatus status;
QElapsedTimer t;
if (timeout)
t.start();
switch (awaitStyle) {
case ProcessMainThreadEvents:
while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == AsyncStatus::Started) {
QCoreApplication::processEvents();
if (timeout && t.hasExpired(timeout))
return ERROR_TIMEOUT;
}
break;
case ProcessThreadEvents:
if (QAbstractEventDispatcher *dispatcher = QThread::currentThread()->eventDispatcher()) {
while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == AsyncStatus::Started) {
dispatcher->processEvents(QEventLoop::AllEvents);
if (timeout && t.hasExpired(timeout))
return ERROR_TIMEOUT;
}
break;
}
// fall through
default:
case YieldThread:
while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == AsyncStatus::Started) {
QThread::yieldCurrentThread();
if (timeout && t.hasExpired(timeout))
return ERROR_TIMEOUT;
}
break;
}
if (FAILED(hr) || status != AsyncStatus::Completed) {
HRESULT ec;
hr = asyncInfo->get_ErrorCode(&ec);
if (FAILED(hr))
return hr;
hr = asyncInfo->Close();
if (FAILED(hr))
return hr;
return ec;
}
return hr;
}
template <typename T>
static inline HRESULT await(const Microsoft::WRL::ComPtr<T> &asyncOp, AwaitStyle awaitStyle = YieldThread, uint timeout = 0)
{
HRESULT hr = _await_impl(asyncOp, awaitStyle, timeout);
if (FAILED(hr))
return hr;
return asyncOp->GetResults();
}
template <typename T, typename U>
static inline HRESULT await(const Microsoft::WRL::ComPtr<T> &asyncOp, U *results, AwaitStyle awaitStyle = YieldThread, uint timeout = 0)
{
HRESULT hr = _await_impl(asyncOp, awaitStyle, timeout);
if (FAILED(hr))
return hr;
return asyncOp->GetResults(results);
}
} // QWinRTFunctions
QT_END_NAMESPACE
#endif // Q_OS_WIN && Q_CC_MSVC
#endif // QFUNCTIONS_WINRT_P_H
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