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47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
#pragma once
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#include <functional>
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#include <QFuture>
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#include <QtGlobal>
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template<typename T> struct FutureHolder {
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std::function<void()> cancelAll;
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QFuture<T> future;
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};
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QFuture<void> CreateFuture();
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template<typename T> inline QFuture<T> PreventFutureDeadlock(QFuture<T> future)
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{
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/*
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* QFutures deadlock if there are continuations on the same thread that
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* need to wait for the previous continuation to finish, see
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* https://github.com/qt/qtbase/commit/59e21a536f7f81625216dc7a621e7be59919da33
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*
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* related bugs:
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* https://bugreports.qt.io/browse/QTBUG-119406
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* https://bugreports.qt.io/browse/QTBUG-119103
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* https://bugreports.qt.io/browse/QTBUG-117918
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* https://bugreports.qt.io/browse/QTBUG-119579
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* https://bugreports.qt.io/browse/QTBUG-119810
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* @RytoEX's summary:
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* QTBUG-119406 and QTBUG-119103 affect Qt 6.6.0 and are fixed in Qt 6.6.2 and 6.7.0+.
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* QTBUG-119579 and QTBUG-119810 affect Qt 6.6.1 and are fixed in Qt 6.6.2 and 6.7.0+.
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* QTBUG-117918 is the only strange one that seems to possibly affect all Qt 6.x versions
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* until 6.6.2, but only in Debug builds.
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*
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* To fix this, move relevant QFutures to another thread before resuming
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* on main thread for affected Qt versions
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*/
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#if (QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)) && \
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(QT_VERSION < QT_VERSION_CHECK(6, 6, 2))
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if (future.isFinished()) {
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return future;
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}
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return future.then(QtFuture::Launch::Async, [](T val) { return val; });
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#else
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return future;
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#endif
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}
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