diff options
Diffstat (limited to 'tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp')
| -rw-r--r-- | tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp | 69 |
1 files changed, 38 insertions, 31 deletions
diff --git a/tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp b/tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp index 2a8a340925..62ad4f872a 100644 --- a/tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp +++ b/tests/auto/corelib/thread/qfuturesynchronizer/tst_qfuturesynchronizer.cpp @@ -1,32 +1,7 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the test suite of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:GPL-EXCEPT$ -** 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 General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3 as published by the Free Software -** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT -** 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-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <QtTest> +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +#include <QTest> #include <QtCore/qfuturesynchronizer.h> #include <QtCore/qfuture.h> @@ -38,6 +13,7 @@ class tst_QFutureSynchronizer : public QObject private Q_SLOTS: void construction(); + void setFutureAliasingExistingMember(); void addFuture(); void cancelOnWait(); void clearFutures(); @@ -58,6 +34,38 @@ void tst_QFutureSynchronizer::construction() QCOMPARE(synchronizerWithFuture.futures().size(), 1); } +void tst_QFutureSynchronizer::setFutureAliasingExistingMember() +{ + // + // GIVEN: a QFutureSynchronizer with one QFuture: + // + QFutureSynchronizer synchronizer(QtFuture::makeReadyValueFuture(42)); + + // + // WHEN: calling setFuture() with an alias of the QFuture already in `synchronizer`: + // + for (int i = 0; i < 2; ++i) { + // The next line triggers -Wdangling-reference, but it's a FP because + // of implicit sharing. We cannot keep a copy of synchronizer.futures() + // around to avoid the warning, as the extra copy would cause a detach() + // of m_futures inside setFuture() with the consequence that `f` no longer + // aliases an element in m_futures, which is the goal of this test. +QT_WARNING_PUSH +#if defined(Q_CC_GNU_ONLY) && Q_CC_GNU >= 1301 +QT_WARNING_DISABLE_GCC("-Wdangling-reference") +#endif + const auto &f = synchronizer.futures().constFirst(); +QT_WARNING_POP + synchronizer.setFuture(f); + } + + // + // THEN: it didn't crash + // + QCOMPARE(synchronizer.futures().size(), 1); + QCOMPARE(synchronizer.futures().constFirst().result(), 42); +} + void tst_QFutureSynchronizer::addFuture() { QFutureSynchronizer<void> synchronizer; @@ -107,7 +115,7 @@ void tst_QFutureSynchronizer::futures() synchronizer.addFuture(future); } - QCOMPARE(futures, synchronizer.futures()); + QCOMPARE(futures.size(), synchronizer.futures().size()); } void tst_QFutureSynchronizer::setFuture() @@ -122,7 +130,6 @@ void tst_QFutureSynchronizer::setFuture() QFuture<void> future; synchronizer.setFuture(future); QCOMPARE(synchronizer.futures().size(), 1); - QCOMPARE(synchronizer.futures().first(), future); } void tst_QFutureSynchronizer::waitForFinished() |