vendor/libc++/libc++-release_370-r246257

11 files changed, 918 insertions, 0 deletions

diff --git a/test/std/thread/futures/futures.shared_future/copy_assign.pass.cpp b/test/std/thread/futures/futures.shared_future/copy_assign.pass.cpp
new file mode 100644
index 0000000000000..b23ba196ec30e
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/copy_assign.pass.cpp
@@ -0,0 +1,76 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future& operator=(const shared_future& rhs);
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}
diff --git a/test/std/thread/futures/futures.shared_future/copy_ctor.pass.cpp b/test/std/thread/futures/futures.shared_future/copy_ctor.pass.cpp
new file mode 100644
index 0000000000000..425d1f9be96ff
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/copy_ctor.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future(const shared_future& rhs);
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = f0;
+        assert(f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/ctor_future.pass.cpp b/test/std/thread/futures/futures.shared_future/ctor_future.pass.cpp
new file mode 100644
index 0000000000000..3a78b80f0634a
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/ctor_future.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future(future<R>&& rhs);
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/default.pass.cpp b/test/std/thread/futures/futures.shared_future/default.pass.cpp
new file mode 100644
index 0000000000000..92927f5f69330
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/default.pass.cpp
@@ -0,0 +1,35 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future();
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+    {
+        std::shared_future<int> f;
+        assert(!f.valid());
+    }
+    {
+        std::shared_future<int&> f;
+        assert(!f.valid());
+    }
+    {
+        std::shared_future<void> f;
+        assert(!f.valid());
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/dtor.pass.cpp b/test/std/thread/futures/futures.shared_future/dtor.pass.cpp
new file mode 100644
index 0000000000000..baa89cb12b1c4
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/dtor.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// ~shared_future();
+
+#include <future>
+#include <cassert>
+
+#include "../test_allocator.h"
+
+int main()
+{
+    assert(test_alloc_base::count == 0);
+    {
+        typedef int T;
+        std::shared_future<T> f;
+        {
+            std::promise<T> p(std::allocator_arg, test_allocator<T>());
+            assert(test_alloc_base::count == 1);
+            f = p.get_future();
+            assert(test_alloc_base::count == 1);
+            assert(f.valid());
+        }
+        assert(test_alloc_base::count == 1);
+        assert(f.valid());
+    }
+    assert(test_alloc_base::count == 0);
+    {
+        typedef int& T;
+        std::shared_future<T> f;
+        {
+            std::promise<T> p(std::allocator_arg, test_allocator<int>());
+            assert(test_alloc_base::count == 1);
+            f = p.get_future();
+            assert(test_alloc_base::count == 1);
+            assert(f.valid());
+        }
+        assert(test_alloc_base::count == 1);
+        assert(f.valid());
+    }
+    assert(test_alloc_base::count == 0);
+    {
+        typedef void T;
+        std::shared_future<T> f;
+        {
+            std::promise<T> p(std::allocator_arg, test_allocator<T>());
+            assert(test_alloc_base::count == 1);
+            f = p.get_future();
+            assert(test_alloc_base::count == 1);
+            assert(f.valid());
+        }
+        assert(test_alloc_base::count == 1);
+        assert(f.valid());
+    }
+    assert(test_alloc_base::count == 0);
+}
diff --git a/test/std/thread/futures/futures.shared_future/get.pass.cpp b/test/std/thread/futures/futures.shared_future/get.pass.cpp
new file mode 100644
index 0000000000000..c5ee234b127f8
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/get.pass.cpp
@@ -0,0 +1,145 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// const R& shared_future::get();
+// R& shared_future<R&>::get();
+// void shared_future<void>::get();
+
+#include <future>
+#include <cassert>
+
+void func1(std::promise<int> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_value(3);
+}
+
+void func2(std::promise<int> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_exception(std::make_exception_ptr(3));
+}
+
+int j = 0;
+
+void func3(std::promise<int&> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    j = 5;
+    p.set_value(j);
+}
+
+void func4(std::promise<int&> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_exception(std::make_exception_ptr(3.5));
+}
+
+void func5(std::promise<void> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_value();
+}
+
+void func6(std::promise<void> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_exception(std::make_exception_ptr('c'));
+}
+
+int main()
+{
+    {
+        typedef int T;
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func1, std::move(p)).detach();
+            assert(f.valid());
+            assert(f.get() == 3);
+            assert(f.valid());
+        }
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func2, std::move(p)).detach();
+            try
+            {
+                assert(f.valid());
+                assert(f.get() == 3);
+                assert(false);
+            }
+            catch (int i)
+            {
+                assert(i == 3);
+            }
+            assert(f.valid());
+        }
+    }
+    {
+        typedef int& T;
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func3, std::move(p)).detach();
+            assert(f.valid());
+            assert(f.get() == 5);
+            assert(f.valid());
+        }
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func4, std::move(p)).detach();
+            try
+            {
+                assert(f.valid());
+                assert(f.get() == 3);
+                assert(false);
+            }
+            catch (double i)
+            {
+                assert(i == 3.5);
+            }
+            assert(f.valid());
+        }
+    }
+    {
+        typedef void T;
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func5, std::move(p)).detach();
+            assert(f.valid());
+            f.get();
+            assert(f.valid());
+        }
+        {
+            std::promise<T> p;
+            std::shared_future<T> f = p.get_future();
+            std::thread(func6, std::move(p)).detach();
+            try
+            {
+                assert(f.valid());
+                f.get();
+                assert(false);
+            }
+            catch (char i)
+            {
+                assert(i == 'c');
+            }
+            assert(f.valid());
+        }
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/move_assign.pass.cpp b/test/std/thread/futures/futures.shared_future/move_assign.pass.cpp
new file mode 100644
index 0000000000000..6b58f41c90855
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/move_assign.pass.cpp
@@ -0,0 +1,76 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future& operator=(shared_future&& rhs);
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f;
+        f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}
diff --git a/test/std/thread/futures/futures.shared_future/move_ctor.pass.cpp b/test/std/thread/futures/futures.shared_future/move_ctor.pass.cpp
new file mode 100644
index 0000000000000..32b8fd77c672b
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/move_ctor.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// shared_future(shared_future&& rhs);
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f0 = p.get_future();
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::shared_future<T> f0;
+        std::shared_future<T> f = std::move(f0);
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/wait.pass.cpp b/test/std/thread/futures/futures.shared_future/wait.pass.cpp
new file mode 100644
index 0000000000000..4293fcab35643
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/wait.pass.cpp
@@ -0,0 +1,88 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// void wait() const;
+
+#include <future>
+#include <cassert>
+
+void func1(std::promise<int> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_value(3);
+}
+
+int j = 0;
+
+void func3(std::promise<int&> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    j = 5;
+    p.set_value(j);
+}
+
+void func5(std::promise<void> p)
+{
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    p.set_value();
+}
+
+int main()
+{
+    typedef std::chrono::high_resolution_clock Clock;
+    typedef std::chrono::duration<double, std::milli> ms;
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func1, std::move(p)).detach();
+        assert(f.valid());
+        f.wait();
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func3, std::move(p)).detach();
+        assert(f.valid());
+        f.wait();
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func5, std::move(p)).detach();
+        assert(f.valid());
+        f.wait();
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/wait_for.pass.cpp b/test/std/thread/futures/futures.shared_future/wait_for.pass.cpp
new file mode 100644
index 0000000000000..e5a4754e38ad5
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/wait_for.pass.cpp
@@ -0,0 +1,97 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+
+// <future>
+
+// class shared_future<R>
+
+// template <class Rep, class Period>
+//   future_status
+//   wait_for(const chrono::duration<Rep, Period>& rel_time) const;
+
+#include <future>
+#include <cassert>
+
+typedef std::chrono::milliseconds ms;
+
+void func1(std::promise<int> p)
+{
+    std::this_thread::sleep_for(ms(500));
+    p.set_value(3);
+}
+
+int j = 0;
+
+void func3(std::promise<int&> p)
+{
+    std::this_thread::sleep_for(ms(500));
+    j = 5;
+    p.set_value(j);
+}
+
+void func5(std::promise<void> p)
+{
+    std::this_thread::sleep_for(ms(500));
+    p.set_value();
+}
+
+int main()
+{
+    typedef std::chrono::high_resolution_clock Clock;
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func1, std::move(p)).detach();
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::timeout);
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::ready);
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func3, std::move(p)).detach();
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::timeout);
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::ready);
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::shared_future<T> f = p.get_future();
+        std::thread(func5, std::move(p)).detach();
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::timeout);
+        assert(f.valid());
+        assert(f.wait_for(ms(300)) == std::future_status::ready);
+        assert(f.valid());
+        Clock::time_point t0 = Clock::now();
+        f.wait();
+        Clock::time_point t1 = Clock::now();
+        assert(f.valid());
+        assert(t1-t0 < ms(5));
+    }
+}
diff --git a/test/std/thread/futures/futures.shared_future/wait_until.pass.cpp b/test/std/thread/futures/futures.shared_future/wait_until.pass.cpp
new file mode 100644
index 0000000000000..6a6aeba7759e3
--- /dev/null
+++ b/test/std/thread/futures/futures.shared_future/wait_until.pass.cpp
@@ -0,0 +1,129 @@
+ //===----------------------------------------------------------------------===//
+ //
+ //                     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
+
+ // <future>
+
+ // class shared_future<R>
+
+ // template <class Clock, class Duration>
+ //   future_status
+ //   wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
+
+ #include <future>
+ #include <atomic>
+ #include <cassert>
+
+ enum class WorkerThreadState { Uninitialized, AllowedToRun, Exiting };
+ typedef std::chrono::milliseconds ms;
+
+ std::atomic<WorkerThreadState> thread_state(WorkerThreadState::Uninitialized);
+
+ void set_worker_thread_state(WorkerThreadState state)
+ {
+     thread_state.store(state, std::memory_order_relaxed);
+ }
+
+ void wait_for_worker_thread_state(WorkerThreadState state)
+ {
+     while (thread_state.load(std::memory_order_relaxed) != state);
+ }
+
+ void func1(std::promise<int> p)
+ {
+     wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
+     p.set_value(3);
+     set_worker_thread_state(WorkerThreadState::Exiting);
+ }
+
+ int j = 0;
+
+ void func3(std::promise<int&> p)
+ {
+     wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
+     j = 5;
+     p.set_value(j);
+     set_worker_thread_state(WorkerThreadState::Exiting);
+ }
+
+ void func5(std::promise<void> p)
+ {
+     wait_for_worker_thread_state(WorkerThreadState::AllowedToRun);
+     p.set_value();
+     set_worker_thread_state(WorkerThreadState::Exiting);
+ }
+
+ int main()
+ {
+     typedef std::chrono::high_resolution_clock Clock;
+     {
+         typedef int T;
+         std::promise<T> p;
+         std::shared_future<T> f = p.get_future();
+         std::thread(func1, std::move(p)).detach();
+         assert(f.valid());
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
+         assert(f.valid());
+
+         // allow the worker thread to produce the result and wait until the worker is done
+         set_worker_thread_state(WorkerThreadState::AllowedToRun);
+         wait_for_worker_thread_state(WorkerThreadState::Exiting);
+
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
+         assert(f.valid());
+         Clock::time_point t0 = Clock::now();
+         f.wait();
+         Clock::time_point t1 = Clock::now();
+         assert(f.valid());
+         assert(t1-t0 < ms(5));
+     }
+     {
+         typedef int& T;
+         std::promise<T> p;
+         std::shared_future<T> f = p.get_future();
+         std::thread(func3, std::move(p)).detach();
+         assert(f.valid());
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
+         assert(f.valid());
+
+         // allow the worker thread to produce the result and wait until the worker is done
+         set_worker_thread_state(WorkerThreadState::AllowedToRun);
+         wait_for_worker_thread_state(WorkerThreadState::Exiting);
+
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
+         assert(f.valid());
+         Clock::time_point t0 = Clock::now();
+         f.wait();
+         Clock::time_point t1 = Clock::now();
+         assert(f.valid());
+         assert(t1-t0 < ms(5));
+     }
+     {
+         typedef void T;
+         std::promise<T> p;
+         std::shared_future<T> f = p.get_future();
+         std::thread(func5, std::move(p)).detach();
+         assert(f.valid());
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::timeout);
+         assert(f.valid());
+
+         // allow the worker thread to produce the result and wait until the worker is done
+         set_worker_thread_state(WorkerThreadState::AllowedToRun);
+         wait_for_worker_thread_state(WorkerThreadState::Exiting);
+
+         assert(f.wait_until(Clock::now() + ms(10)) == std::future_status::ready);
+         assert(f.valid());
+         Clock::time_point t0 = Clock::now();
+         f.wait();
+         Clock::time_point t1 = Clock::now();
+         assert(f.valid());
+         assert(t1-t0 < ms(5));
+     }
+ }