diff --git a/...uirements/thread.shared_mutex.requirements/thread.shared_mutex.class/lock_shared.pass.cpp b/...uirements/thread.shared_mutex.requirements/thread.shared_mutex.class/lock_shared.pass.cpp
@@ -0,0 +1,73 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+// UNSUPPORTED: c++03, c++98, c++11, c++14
+
+// <shared_mutex>
+
+// class shared_mutex;
+
+// void lock_shared();
+
+#include <shared_mutex>
+#include <thread>
+#include <vector>
+#include <cstdlib>
+#include <cassert>
+
+std::shared_mutex m;
+
+typedef std::chrono::system_clock Clock;
+typedef Clock::time_point time_point;
+typedef Clock::duration duration;
+typedef std::chrono::milliseconds ms;
+typedef std::chrono::nanoseconds ns;
+
+void f()
+{
+    time_point t0 = Clock::now();
+    m.lock_shared();
+    time_point t1 = Clock::now();
+    m.unlock_shared();
+    ns d = t1 - t0 - ms(250);
+    assert(d < ms(50));  // within 50ms
+}
+
+void g()
+{
+    time_point t0 = Clock::now();
+    m.lock_shared();
+    time_point t1 = Clock::now();
+    m.unlock_shared();
+    ns d = t1 - t0;
+    assert(d < ms(50));  // within 50ms
+}
+
+
+int main()
+{
+    m.lock();
+    std::vector<std::thread> v;
+    for (int i = 0; i < 5; ++i)
+        v.push_back(std::thread(f));
+    std::this_thread::sleep_for(ms(250));
+    m.unlock();
+    for (auto& t : v)
+        t.join();
+    m.lock_shared();
+    for (auto& t : v)
+        t = std::thread(g);
+    std::thread q(f);
+    std::this_thread::sleep_for(ms(250));
+    m.unlock_shared();
+    for (auto& t : v)
+        t.join();
+    q.join();
+}
diff --git a/...requirements/thread.shared_mutex.requirements/thread.shared_mutex.class/try_lock.pass.cpp b/...requirements/thread.shared_mutex.requirements/thread.shared_mutex.class/try_lock.pass.cpp
@@ -0,0 +1,53 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+// UNSUPPORTED: c++03, c++98, c++11, c++14
+
+// <shared_mutex>
+
+// class shared_mutex;
+
+// bool try_lock();
+
+#include <shared_mutex>
+#include <thread>
+#include <cstdlib>
+#include <cassert>
+
+std::shared_mutex m;
+
+typedef std::chrono::system_clock Clock;
+typedef Clock::time_point time_point;
+typedef Clock::duration duration;
+typedef std::chrono::milliseconds ms;
+typedef std::chrono::nanoseconds ns;
+
+void f()
+{
+    time_point t0 = Clock::now();
+    assert(!m.try_lock());
+    assert(!m.try_lock());
+    assert(!m.try_lock());
+    while(!m.try_lock())
+        ;
+    time_point t1 = Clock::now();
+    m.unlock();
+    ns d = t1 - t0 - ms(250);
+    assert(d < ms(200));  // within 200ms
+}
+
+int main()
+{
+    m.lock();
+    std::thread t(f);
+    std::this_thread::sleep_for(ms(250));
+    m.unlock();
+    t.join();
+}
diff --git a/...ments/thread.shared_mutex.requirements/thread.shared_mutex.class/try_lock_shared.pass.cpp b/...ments/thread.shared_mutex.requirements/thread.shared_mutex.class/try_lock_shared.pass.cpp
@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+// UNSUPPORTED: c++03, c++98, c++11, c++14
+
+// <shared_mutex>
+
+// class shared_mutex;
+
+// bool try_lock_shared();
+
+#include <shared_mutex>
+#include <thread>
+#include <vector>
+#include <cstdlib>
+#include <cassert>
+
+std::shared_mutex m;
+
+typedef std::chrono::system_clock Clock;
+typedef Clock::time_point time_point;
+typedef Clock::duration duration;
+typedef std::chrono::milliseconds ms;
+typedef std::chrono::nanoseconds ns;
+
+void f()
+{
+    time_point t0 = Clock::now();
+    assert(!m.try_lock_shared());
+    assert(!m.try_lock_shared());
+    assert(!m.try_lock_shared());
+    while(!m.try_lock_shared())
+        ;
+    time_point t1 = Clock::now();
+    m.unlock_shared();
+    ns d = t1 - t0 - ms(250);
+    assert(d < ms(200));  // within 200ms
+}
+
+
+int main()
+{
+    m.lock();
+    std::vector<std::thread> v;
+    for (int i = 0; i < 5; ++i)
+        v.push_back(std::thread(f));
+    std::this_thread::sleep_for(ms(250));
+    m.unlock();
+    for (auto& t : v)
+        t.join();
+}