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Diffstat (limited to 'src/corelib/kernel/qfunctions_winrt_p.h')
| -rw-r--r-- | src/corelib/kernel/qfunctions_winrt_p.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/corelib/kernel/qfunctions_winrt_p.h b/src/corelib/kernel/qfunctions_winrt_p.h new file mode 100644 index 0000000000..aa32747bc8 --- /dev/null +++ b/src/corelib/kernel/qfunctions_winrt_p.h @@ -0,0 +1,184 @@ +/**************************************************************************** +** +** 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 |