1 files changed, 111 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/tools/qsharedpointer/tst_bench_shared_ptr.cpp b/tests/benchmarks/corelib/tools/qsharedpointer/tst_bench_shared_ptr.cpp
new file mode 100644
index 0000000000..6197863601
--- /dev/null
+++ b/tests/benchmarks/corelib/tools/qsharedpointer/tst_bench_shared_ptr.cpp
@@ -0,0 +1,111 @@
+// Copyright (C) 2021 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QObject>
+#include <QScopeGuard>
+#include <QSharedPointer>
+#include <QTest>
+
+#include <atomic>
+#include <memory>
+#include <thread>
+#include <vector>
+
+#if __has_include(<boost/shared_ptr.hpp>)
+#  include <boost/shared_ptr.hpp>
+#  include <boost/make_shared.hpp>
+
+#  ifdef BOOST_NO_EXCEPTIONS
+// https://stackoverflow.com/a/9530546/134841
+// https://www.boost.org/doc/libs/1_79_0/libs/throw_exception/doc/html/throw_exception.html#throw_exception
+BOOST_NORETURN void boost::throw_exception(const std::exception &) { std::terminate(); }
+#    if BOOST_VERSION >= 107300
+// https://www.boost.org/doc/libs/1_79_0/libs/throw_exception/doc/html/throw_exception.html#changes_in_1_73_0
+BOOST_NORETURN void boost::throw_exception(const std::exception &, const boost::source_location &)
+{ std::terminate(); }
+#    endif // Boost v1.73
+#  endif // BOOST_NO_EXCEPTIONS
+
+#  define ONLY_IF_BOOST(x) x
+#else
+#  define ONLY_IF_BOOST(x) QSKIP("This benchmark requires Boost.SharedPtr.")
+#endif
+
+class tst_QSharedPointer : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void refAndDeref_null_QSP_int() { refAndDeref<QSharedPointer<int>>(); }
+    void refAndDeref_null_SSP_int() { refAndDeref<std::shared_ptr<int>>(); }
+    void refAndDeref_null_BSP_int() { ONLY_IF_BOOST(refAndDeref<boost::shared_ptr<int>>()); }
+
+    void refAndDeref_null_QSP_QString() { refAndDeref<QSharedPointer<QString>>(); }
+    void refAndDeref_null_SSP_QString() { refAndDeref<std::shared_ptr<QString>>(); }
+    void refAndDeref_null_BSP_QString() { ONLY_IF_BOOST(refAndDeref<boost::shared_ptr<QString>>()); }
+
+    void refAndDeref_nonnull_QSP_int() { refAndDeref(QSharedPointer<int>::create(42)); }
+    void refAndDeref_nonnull_SSP_int() { refAndDeref(std::make_shared<int>(42)); }
+    void refAndDeref_nonnull_BSP_int() { ONLY_IF_BOOST(refAndDeref(boost::make_shared<int>(42))); }
+
+    void refAndDeref_nonnull_QSP_QString() { refAndDeref(QSharedPointer<QString>::create(QStringLiteral("Hello"))); }
+    void refAndDeref_nonnull_SSP_QString() { refAndDeref(std::make_shared<QString>(QStringLiteral("Hello"))); }
+    void refAndDeref_nonnull_BSP_QString() { ONLY_IF_BOOST(refAndDeref(boost::make_shared<QString>(QStringLiteral("Hello")))); }
+
+private:
+    template <typename SP>
+    void refAndDeref(SP sp = {})
+    {
+        QBENCHMARK {
+            [[maybe_unused]] auto copy = sp;
+        }
+    }
+
+private Q_SLOTS:
+    void threadedRefAndDeref_null_QSP_int() { threadedRefAndDeref<QSharedPointer<int>>(); }
+    void threadedRefAndDeref_null_SSP_int() { threadedRefAndDeref<std::shared_ptr<int>>(); }
+    void threadedRefAndDeref_null_BSP_int() { ONLY_IF_BOOST(threadedRefAndDeref<boost::shared_ptr<int>>()); }
+
+    void threadedRefAndDeref_null_QSP_QString() { threadedRefAndDeref<QSharedPointer<QString>>(); }
+    void threadedRefAndDeref_null_SSP_QString() { threadedRefAndDeref<std::shared_ptr<QString>>(); }
+    void threadedRefAndDeref_null_BSP_QString() { ONLY_IF_BOOST(threadedRefAndDeref<boost::shared_ptr<QString>>()); }
+
+    void threadedRefAndDeref_nonnull_QSP_int() { threadedRefAndDeref(QSharedPointer<int>::create(42)); }
+    void threadedRefAndDeref_nonnull_SSP_int() { threadedRefAndDeref(std::make_shared<int>(42)); }
+    void threadedRefAndDeref_nonnull_BSP_int() { ONLY_IF_BOOST(threadedRefAndDeref(boost::make_shared<int>(42))); }
+
+    void threadedRefAndDeref_nonnull_QSP_QString() { threadedRefAndDeref(QSharedPointer<QString>::create(QStringLiteral("Hello"))); }
+    void threadedRefAndDeref_nonnull_SSP_QString() { threadedRefAndDeref(std::make_shared<QString>(QStringLiteral("Hello"))); }
+    void threadedRefAndDeref_nonnull_BSP_QString() { ONLY_IF_BOOST(threadedRefAndDeref(boost::make_shared<QString>(QStringLiteral("Hello")))); }
+
+private:
+    template <typename SP>
+    void threadedRefAndDeref(SP sp = {})
+    {
+        std::atomic<bool> cancel = false;
+        std::vector<std::thread> threads;
+        const auto numCores = std::max(2U, std::thread::hardware_concurrency());
+        for (uint i = 0; i < numCores - 1; ++i) {
+            threads.emplace_back([sp, &cancel] {
+                    while (!cancel.load(std::memory_order_relaxed)) {
+                        for (int i = 0; i < 100; ++i)
+                            [[maybe_unused]] auto copy = sp;
+                    }
+                });
+        }
+        const auto join = qScopeGuard([&] {
+            cancel.store(true, std::memory_order_relaxed);
+            for (auto &t : threads)
+                t.join();
+        });
+
+        QBENCHMARK {
+            [[maybe_unused]] auto copy = sp;
+        }
+    }
+};
+
+QTEST_MAIN(tst_QSharedPointer)
+
+#include "tst_bench_shared_ptr.moc"