diff options
Diffstat (limited to 'tests/auto/corelib/tools/qatomicscopedvaluerollback/tst_qatomicscopedvaluerollback.cpp')
-rw-r--r-- | tests/auto/corelib/tools/qatomicscopedvaluerollback/tst_qatomicscopedvaluerollback.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qatomicscopedvaluerollback/tst_qatomicscopedvaluerollback.cpp b/tests/auto/corelib/tools/qatomicscopedvaluerollback/tst_qatomicscopedvaluerollback.cpp new file mode 100644 index 0000000000..89bd1d7ff6 --- /dev/null +++ b/tests/auto/corelib/tools/qatomicscopedvaluerollback/tst_qatomicscopedvaluerollback.cpp @@ -0,0 +1,164 @@ +// Copyright (C) 2022 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +#include <QtCore/qatomicscopedvaluerollback.h> + +#include <QTest> + +class tst_QAtomicScopedValueRollback : public QObject +{ + Q_OBJECT + +private Q_SLOTS: + void leavingScope(); + void leavingScopeAfterCommit(); + void rollbackToPreviousCommit(); + void exceptions(); + void earlyExitScope(); +private: + void earlyExitScope_helper(int exitpoint, std::atomic<int> &member); +}; + +void tst_QAtomicScopedValueRollback::leavingScope() +{ + QAtomicInt i = 0; + QBasicAtomicInteger<bool> b = false; + std::atomic<bool> b2 = false; + int x = 0, y = 42; + QBasicAtomicPointer<int> p = &x; + + //test rollback on going out of scope + { + QAtomicScopedValueRollback ri(i); + QAtomicScopedValueRollback rb(b); + QAtomicScopedValueRollback rb2(b2, true); + QAtomicScopedValueRollback rp(p); + QCOMPARE(b.loadRelaxed(), false); + QCOMPARE(b2, true); + QCOMPARE(i.loadRelaxed(), 0); + QCOMPARE(p.loadRelaxed(), &x); + b.storeRelaxed(true); + i.storeRelaxed(1); + p.storeRelaxed(&y); + QCOMPARE(b.loadRelaxed(), true); + QCOMPARE(i.loadRelaxed(), 1); + QCOMPARE(p.loadRelaxed(), &y); + } + QCOMPARE(b.loadRelaxed(), false); + QCOMPARE(b2, false); + QCOMPARE(i.loadRelaxed(), 0); + QCOMPARE(p.loadRelaxed(), &x); +} + +void tst_QAtomicScopedValueRollback::leavingScopeAfterCommit() +{ + std::atomic<int> i = 0; + QAtomicInteger<bool> b = false; + + //test rollback on going out of scope + { + QAtomicScopedValueRollback ri(i); + QAtomicScopedValueRollback rb(b); + QCOMPARE(b.loadRelaxed(), false); + QCOMPARE(i, 0); + b.storeRelaxed(true); + i = 1; + QCOMPARE(b.loadRelaxed(), true); + QCOMPARE(i, 1); + ri.commit(); + rb.commit(); + } + QCOMPARE(b.loadRelaxed(), true); + QCOMPARE(i, 1); +} + +void tst_QAtomicScopedValueRollback::rollbackToPreviousCommit() +{ + QBasicAtomicInt i = 0; + { + QAtomicScopedValueRollback ri(i); + i++; + ri.commit(); + i++; + } + QCOMPARE(i.loadRelaxed(), 1); + { + QAtomicScopedValueRollback ri1(i); + i++; + ri1.commit(); + i++; + ri1.commit(); + i++; + } + QCOMPARE(i.loadRelaxed(), 3); +} + +void tst_QAtomicScopedValueRollback::exceptions() +{ + std::atomic<bool> b = false; + bool caught = false; + QT_TRY + { + QAtomicScopedValueRollback rb(b); + b = true; + QT_THROW(std::bad_alloc()); //if Qt compiled without exceptions this is noop + rb.commit(); //if Qt compiled without exceptions, true is committed + } + QT_CATCH(...) + { + caught = true; + } + QCOMPARE(b, !caught); //expect false if exception was thrown, true otherwise +} + +void tst_QAtomicScopedValueRollback::earlyExitScope() +{ + QAtomicInt ai = 0; + std::atomic<int> aj = 0; + while (true) { + QAtomicScopedValueRollback ri(ai); + ++ai; + aj = ai.loadRelaxed(); + if (ai.loadRelaxed() > 8) break; + ri.commit(); + } + QCOMPARE(ai.loadRelaxed(), 8); + QCOMPARE(aj.load(), 9); + + for (int i = 0; i < 5; ++i) { + aj = 1; + earlyExitScope_helper(i, aj); + QCOMPARE(aj.load(), 1 << i); + } +} + +static void operator*=(std::atomic<int> &lhs, int rhs) +{ + int expected = lhs.load(); + while (!lhs.compare_exchange_weak(expected, expected * rhs)) + ; +} + +void tst_QAtomicScopedValueRollback::earlyExitScope_helper(int exitpoint, std::atomic<int>& member) +{ + QAtomicScopedValueRollback r(member); + member *= 2; + if (exitpoint == 0) + return; + r.commit(); + member *= 2; + if (exitpoint == 1) + return; + r.commit(); + member *= 2; + if (exitpoint == 2) + return; + r.commit(); + member *= 2; + if (exitpoint == 3) + return; + r.commit(); +} + +QTEST_MAIN(tst_QAtomicScopedValueRollback) +#include "tst_qatomicscopedvaluerollback.moc" |