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35 lines
1 KiB
C++
35 lines
1 KiB
C++
// Copyright 2017 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <QThread>
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#include <type_traits>
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#include <utility>
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#include "Common/Event.h"
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#include "DolphinQt2/QtUtils/QueueOnObject.h"
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class QObject;
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// QWidget and subclasses are not thread-safe! This helper takes arbitrary code from any thread,
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// safely runs it on the appropriate GUI thread, waits for it to finish, and returns the result.
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template <typename F>
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auto RunOnObject(QObject* object, F&& functor)
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{
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// If we queue up a functor on the current thread, it won't run until we return to the event loop,
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// which means waiting for it to finish will never complete. Instead, run it immediately.
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if (object->thread() == QThread::currentThread())
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return functor();
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Common::Event event;
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std::result_of_t<F()> result;
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QueueOnObject(object, [&event, &result, functor = std::forward<F>(functor) ] {
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result = functor();
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event.Set();
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});
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event.Wait();
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return result;
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}
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