1 files changed, 87 insertions, 0 deletions
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for.pass.cpp
new file mode 100644
index 00000000000..ca48eee19d2
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for.pass.cpp
@@ -0,0 +1,87 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
+// <condition_variable>
+
+// class condition_variable;
+
+// template <class Rep, class Period>
+//     cv_status
+//     wait_for(unique_lock<mutex>& lock,
+//              const chrono::duration<Rep, Period>& rel_time);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <chrono>
+#include <cassert>
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test1 = 0;
+int test2 = 0;
+
+int runs = 0;
+
+void f()
+{
+    typedef std::chrono::system_clock Clock;
+    typedef std::chrono::milliseconds milliseconds;
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    test1 = 1;
+    cv.notify_one();
+    Clock::time_point t0 = Clock::now();
+    while (test2 == 0 &&
+           cv.wait_for(lk, milliseconds(250)) == std::cv_status::no_timeout)
+        ;
+    Clock::time_point t1 = Clock::now();
+    if (runs == 0)
+    {
+        assert(t1 - t0 < milliseconds(250));
+        assert(test2 != 0);
+    }
+    else
+    {
+        assert(t1 - t0 - milliseconds(250) < milliseconds(50));
+        assert(test2 == 0);
+    }
+    ++runs;
+}
+
+int main()
+{
+    {
+        std::unique_lock<std::mutex>lk(mut);
+        std::thread t(f);
+        assert(test1 == 0);
+        while (test1 == 0)
+            cv.wait(lk);
+        assert(test1 != 0);
+        test2 = 1;
+        lk.unlock();
+        cv.notify_one();
+        t.join();
+    }
+    test1 = 0;
+    test2 = 0;
+    {
+        std::unique_lock<std::mutex>lk(mut);
+        std::thread t(f);
+        assert(test1 == 0);
+        while (test1 == 0)
+            cv.wait(lk);
+        assert(test1 != 0);
+        lk.unlock();
+        t.join();
+    }
+}