1 files changed, 161 insertions, 0 deletions
diff --git a/lib/os/os_thread_test.cpp b/lib/os/os_thread_test.cpp
new file mode 100644
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+++ b/lib/os/os_thread_test.cpp
@@ -0,0 +1,161 @@
+/**************************************************************************
+ *
+ * Copyright 2016 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include "os_thread.hpp"
+
+#include "gtest/gtest.h"
+
+TEST(os_thread, hardware_concurrency)
+{
+    EXPECT_GT(os::thread::hardware_concurrency(), 0);
+}
+
+
+static bool b0;
+static void f0(void) {
+    b0 = true;
+}
+
+static bool b1;
+static void f1(int a1) {
+    b1 = a1 == 1;
+}
+
+static bool b2;
+static void f2(int a2, int a3) {
+    b2 = a2 == 2 && a3 == 3;
+}
+
+TEST(os_thread, thread)
+{
+    os::thread t0(&f0);
+    t0.join();
+    EXPECT_TRUE(b0);
+
+    os::thread t1(&f1, 1);
+    t1.join();
+    EXPECT_TRUE(b1);
+
+    os::thread t2(&f2, 2, 3);
+    t2.join();
+    EXPECT_TRUE(b2);
+}
+
+#define NUM_THREADS 4
+
+
+struct Data
+{
+    bool notified[NUM_THREADS];
+    os::condition_variable cv;
+    os::mutex mutex;
+    bool notify = false;
+    volatile unsigned waiting = 0;
+    volatile unsigned c = 0;
+};
+
+#if 0
+    static os::mutex cerr_mutex;
+#   define WITH_CERR_MUTEX(_stmts) \
+        { \
+            os::unique_lock<os::mutex> cerr_lock(cerr_mutex); \
+            _stmts \
+        }
+#else
+#   define WITH_CERR_MUTEX(_stmts)
+#endif
+
+
+static void cvf(Data *data, unsigned idx)
+{
+    WITH_CERR_MUTEX( std::cerr << idx << " started.\n"; )
+
+    {
+        os::unique_lock<os::mutex> l(data->mutex);
+        data->waiting += 1;
+    }
+
+    WITH_CERR_MUTEX( std::cerr << idx << " waiting...\n"; )
+
+    {
+        os::unique_lock<os::mutex> lock(data->mutex);
+        while (!data->notify) {
+            data->cv.wait(lock);
+        }
+        data->notified[idx] = true;
+    }
+
+    WITH_CERR_MUTEX( std::cerr << idx << " notified.\n"; )
+}
+
+
+TEST(os_thread, condition_variable)
+{
+    os::thread t[NUM_THREADS];
+    Data data;
+    unsigned i;
+
+    for (i = 0; i < NUM_THREADS; ++i) {
+        data.notified[i] = false;
+        t[i] = os::thread(cvf, &data, i);
+    }
+
+    for (i = 0; i < NUM_THREADS; ++i) {
+        EXPECT_FALSE(data.notified[i]);
+    }
+
+    WITH_CERR_MUTEX( std::cerr << "M waiting...\n"; )
+
+    do {
+        os::unique_lock<os::mutex> l(data.mutex);
+        if (data.waiting == NUM_THREADS) {
+            break;
+        }
+    } while(true);
+
+    WITH_CERR_MUTEX( std::cerr << "M notifying...\n"; )
+
+    {
+        os::unique_lock<os::mutex> l(data.mutex);
+        data.notify = true;
+    }
+
+    data.cv.notify_all();
+
+    WITH_CERR_MUTEX( std::cerr << "M joining...\n"; )
+    for (i = 0; i < NUM_THREADS; ++i) {
+        t[i].join();
+        EXPECT_TRUE(data.notified[i]);
+    }
+}
+
+
+int
+main(int argc, char **argv)
+{
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}