forked from qt-creator/qt-creator
89d6a36bc6
We already run all operations in threads to avoid blocking, there is no need to start more threads within libclang. Before this change, a reparse would trigger 3 threads to start: 1. clangbackend: Utils::runAsync() for the job 2. libclang-internal: thread for reparse 3. libclang-internal: thread for annotating tokens (highlighting) Ensure that we use the same stack size for our threads as libclang was doing internally. C++ parsers usually have higher stack size requirements. Change-Id: I2f67602ddfbf77ea2c69144b56acf64ba08041f6 Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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**
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****************************************************************************/
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#pragma once
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#include "clangiasyncjob.h"
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#include <utils/runextensions.h>
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#include <QFutureWatcher>
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#include <QObject>
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namespace ClangBackEnd {
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template<class Result>
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class AsyncJob : public IAsyncJob
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{
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public:
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AsyncJob() {}
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~AsyncJob() {}
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using Runner = std::function<Result()>;
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Runner runner() const { return m_runner; }
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void setRunner(const Runner &runner) { m_runner = runner; }
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Result asyncResult() const { return m_futureWatcher.future().result(); }
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QFuture<void> runAsync() final
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{
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const auto onFinished = [this]() {
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finalizeAsyncRun();
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setIsFinished(true);
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finishedHandler()(this);
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};
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QObject::connect(&m_futureWatcher,
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&QFutureWatcher<Result>::finished,
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onFinished);
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// Use 16MB stack size as clang_annotateTokens() would with an internal thread.
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const Utils::StackSizeInBytes stackSize = 1024 * 1024 * 16;
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const QFuture<Result> future = Utils::runAsync(stackSize, m_runner);
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m_futureWatcher.setFuture(future);
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return future;
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}
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void preventFinalization() final
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{
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m_futureWatcher.disconnect();
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}
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private:
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Runner m_runner;
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QFutureWatcher<Result> m_futureWatcher;
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};
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} // namespace ClangBackEnd
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