1 files changed, 129 insertions, 0 deletions
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));
+     }
+ }