diff options
Diffstat (limited to 'src/corelib/kernel/qfunctions_winrt.h')
-rw-r--r-- | src/corelib/kernel/qfunctions_winrt.h | 95 |
1 files changed, 94 insertions, 1 deletions
diff --git a/src/corelib/kernel/qfunctions_winrt.h b/src/corelib/kernel/qfunctions_winrt.h index fa2b2e12ff..5f051c3ea6 100644 --- a/src/corelib/kernel/qfunctions_winrt.h +++ b/src/corelib/kernel/qfunctions_winrt.h @@ -1,6 +1,6 @@ /**************************************************************************** ** -** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtCore module of the Qt Toolkit. @@ -46,6 +46,10 @@ #ifdef Q_OS_WINRT +#include <QtCore/QThread> +#include <QtCore/QAbstractEventDispatcher> +#include <QtCore/qt_windows.h> + QT_BEGIN_NAMESPACE #ifdef QT_BUILD_CORE_LIB @@ -118,5 +122,94 @@ generate_inline_return_func2(_putenv_s, errno_t, const char *, const char *) generate_inline_return_func0(tzset, void) generate_inline_return_func0(_tzset, void) +// Convenience macros for handling HRESULT values +#define RETURN_IF_FAILED(msg, ret) \ + if (FAILED(hr)) { \ + qErrnoWarning(hr, msg); \ + 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 Q_ASSERT_SUCCEEDED(hr) \ + Q_ASSERT_X(SUCCEEDED(hr), Q_FUNC_INFO, qPrintable(qt_error_string(hr))); + + +namespace Microsoft { namespace WRL { template <typename T> class ComPtr; } } + +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) +{ + Microsoft::WRL::ComPtr<IAsyncInfo> asyncInfo; + HRESULT hr = asyncOp.As(&asyncInfo); + if (FAILED(hr)) + return hr; + + AsyncStatus status; + switch (awaitStyle) { + case ProcessMainThreadEvents: + while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == Started) + QCoreApplication::processEvents(); + break; + case ProcessThreadEvents: + if (QAbstractEventDispatcher *dispatcher = QThread::currentThread()->eventDispatcher()) { + while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == Started) + dispatcher->processEvents(QEventLoop::AllEvents); + break; + } + // fall through + default: + case YieldThread: + while (SUCCEEDED(hr = asyncInfo->get_Status(&status)) && status == Started) + QThread::yieldCurrentThread(); + break; + } + + if (FAILED(hr) || status != Completed) { + HRESULT ec; + hr = asyncInfo->get_ErrorCode(&ec); + 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) +{ + HRESULT hr = _await_impl(asyncOp, awaitStyle); + 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) +{ + HRESULT hr = _await_impl(asyncOp, awaitStyle); + if (FAILED(hr)) + return hr; + + return asyncOp->GetResults(results); +} + +} // QWinRTFunctions + #endif // Q_OS_WINRT #endif // QFUNCTIONS_WINRT_H |