1 files changed, 174 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/thread/qwaitcondition/tst_bench_qwaitcondition.cpp b/tests/benchmarks/corelib/thread/qwaitcondition/tst_bench_qwaitcondition.cpp
new file mode 100644
index 0000000000..0abd53fc93
--- /dev/null
+++ b/tests/benchmarks/corelib/thread/qwaitcondition/tst_bench_qwaitcondition.cpp
@@ -0,0 +1,174 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QtCore/QtCore>
+#include <QTest>
+
+#include <math.h>
+#include <condition_variable>
+#include <mutex>
+
+#include <limits.h>
+
+using namespace std::chrono_literals;
+
+class tst_QWaitCondition : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QWaitCondition()
+    {
+    }
+
+private slots:
+    void oscillate_QWaitCondition_QMutex_data() { oscillate_mutex_data(); }
+    void oscillate_QWaitCondition_QMutex();
+    void oscillate_QWaitCondition_QReadWriteLock_data() { oscillate_mutex_data(); }
+    void oscillate_QWaitCondition_QReadWriteLock();
+    void oscillate_std_condition_variable_std_mutex_data() { oscillate_mutex_data(); }
+    void oscillate_std_condition_variable_std_mutex();
+    void oscillate_std_condition_variable_any_QMutex_data() { oscillate_mutex_data(); }
+    void oscillate_std_condition_variable_any_QMutex();
+    void oscillate_std_condition_variable_any_QReadWriteLock_data() { oscillate_mutex_data(); }
+    void oscillate_std_condition_variable_any_QReadWriteLock();
+
+private:
+    void oscillate_mutex_data();
+};
+
+
+int turn;
+const int threadCount = 10;
+QWaitCondition cond;
+std::condition_variable cv;
+std::condition_variable_any cva;
+
+template <typename Cond>
+Cond *get();
+
+template <> std::condition_variable     *get() { return &cv; }
+template <> std::condition_variable_any *get() { return &cva; }
+
+template <class Cond, class Mutex, class Locker>
+class OscillateThread : public QThread
+{
+public:
+    Mutex *mutex;
+    int m_threadid;
+    unsigned long timeout;
+
+    void run() override
+    {
+        for (int count = 0; count < 5000; ++count) {
+            Locker lock(*mutex);
+            while (m_threadid != turn) {
+                if (timeout == ULONG_MAX)
+                    get<Cond>()->wait(lock);
+                else if (timeout == 0) // Windows doesn't unlock the mutex with a zero timeout
+                    get<Cond>()->wait_for(lock, 1ns);
+                else
+                    get<Cond>()->wait_for(lock, timeout * 1ms);
+            }
+            turn = (turn+1) % threadCount;
+            get<Cond>()->notify_all();
+        }
+    }
+};
+
+template <class Mutex, class Locker>
+class OscillateThread<QWaitCondition, Mutex, Locker> : public QThread
+{
+public:
+    Mutex *mutex;
+    int m_threadid;
+    unsigned long timeout;
+
+    void run() override
+    {
+        for (int count = 0; count < 5000; ++count) {
+
+            Locker lock(mutex);
+            while (m_threadid != turn) {
+                cond.wait(mutex, timeout);
+            }
+            turn = (turn+1) % threadCount;
+            cond.wakeAll();
+        }
+    }
+};
+
+template <class Cond, class Mutex, class Locker>
+void oscillate(unsigned long timeout) {
+
+    OscillateThread<Cond, Mutex, Locker> thrd[threadCount];
+    Mutex m;
+    for (int i = 0; i < threadCount; ++i) {
+        thrd[i].mutex = &m;
+        thrd[i].m_threadid = i;
+        thrd[i].timeout = timeout;
+    }
+
+    QBENCHMARK {
+        for (int i = 0; i < threadCount; ++i) {
+            thrd[i].start();
+        }
+        for (int i = 0; i < threadCount; ++i) {
+            thrd[i].wait();
+        }
+    }
+
+}
+
+void tst_QWaitCondition::oscillate_mutex_data()
+{
+    QTest::addColumn<unsigned long>("timeout");
+
+    QTest::newRow("0") << 0ul;
+    QTest::newRow("1") << 1ul;
+    QTest::newRow("1000") << 1000ul;
+    QTest::newRow("forever") << ULONG_MAX;
+}
+
+void tst_QWaitCondition::oscillate_QWaitCondition_QMutex()
+{
+    QFETCH(unsigned long, timeout);
+    oscillate<QWaitCondition, QMutex, QMutexLocker<QMutex>>(timeout);
+}
+
+void tst_QWaitCondition::oscillate_QWaitCondition_QReadWriteLock()
+{
+    QFETCH(unsigned long, timeout);
+    oscillate<QWaitCondition, QReadWriteLock, QWriteLocker>(timeout);
+}
+
+void tst_QWaitCondition::oscillate_std_condition_variable_std_mutex()
+{
+    QFETCH(unsigned long, timeout);
+    oscillate<std::condition_variable, std::mutex, std::unique_lock<std::mutex>>(timeout);
+}
+
+
+void tst_QWaitCondition::oscillate_std_condition_variable_any_QMutex()
+{
+    QFETCH(unsigned long, timeout);
+    oscillate<std::condition_variable_any, QMutex, std::unique_lock<QMutex>>(timeout);
+}
+
+
+void tst_QWaitCondition::oscillate_std_condition_variable_any_QReadWriteLock()
+{
+    QFETCH(unsigned long, timeout);
+
+    struct WriteLocker : QWriteLocker {
+        // adapt to BasicLockable
+        explicit WriteLocker(QReadWriteLock &m) : QWriteLocker{&m} {}
+        void lock() { relock(); }
+    };
+
+    oscillate<std::condition_variable_any, QReadWriteLock, WriteLocker>(timeout);
+}
+
+QTEST_MAIN(tst_QWaitCondition)
+
+#include "tst_bench_qwaitcondition.moc"