Move test into test/std subdirectory.

llvm-svn: 224658

13 files changed, 832 insertions, 0 deletions

diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/assign.fail.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/assign.fail.cpp
new file mode 100644
index 00000000000..e88550c5b8a
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/assign.fail.cpp
@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <condition_variable>
+
+// class condition_variable;
+
+// condition_variable& operator=(const condition_variable&) = delete;
+
+#include <condition_variable>
+#include <cassert>
+
+int main()
+{
+    std::condition_variable cv0;
+    std::condition_variable cv1;
+    cv1 = cv0;
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/copy.fail.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/copy.fail.cpp
new file mode 100644
index 00000000000..24d6ee0e71d
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/copy.fail.cpp
@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <condition_variable>
+
+// class condition_variable;
+
+// condition_variable(const condition_variable&) = delete;
+
+#include <condition_variable>
+#include <cassert>
+
+int main()
+{
+    std::condition_variable cv0;
+    std::condition_variable cv1(cv0);
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/default.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/default.pass.cpp
new file mode 100644
index 00000000000..6f43564c3b3
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/default.pass.cpp
@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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;
+
+// condition_variable();
+
+#include <condition_variable>
+#include <cassert>
+
+int main()
+{
+    std::condition_variable cv;
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/destructor.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/destructor.pass.cpp
new file mode 100644
index 00000000000..437ed965b19
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/destructor.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
+
+// <condition_variable>
+
+// class condition_variable;
+
+// ~condition_variable();
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <cassert>
+
+std::condition_variable* cv;
+std::mutex m;
+typedef std::unique_lock<std::mutex> Lock;
+
+bool f_ready = false;
+bool g_ready = false;
+
+void f()
+{
+    Lock lk(m);
+    f_ready = true;
+    cv->notify_one();
+    delete cv;
+}
+
+void g()
+{
+    Lock lk(m);
+    g_ready = true;
+    cv->notify_one();
+    while (!f_ready)
+        cv->wait(lk);
+}
+
+int main()
+{
+    cv = new std::condition_variable;
+    std::thread th2(g);
+    Lock lk(m);
+    while (!g_ready)
+        cv->wait(lk);
+    lk.unlock();
+    std::thread th1(f);
+    th1.join();
+    th2.join();
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/native_handle.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/native_handle.pass.cpp
new file mode 100644
index 00000000000..bf28e01a0e8
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/native_handle.pass.cpp
@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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;
+
+// typedef pthread_cond_t* native_handle_type;
+// native_handle_type native_handle();
+
+#include <condition_variable>
+#include <cassert>
+
+int main()
+{
+    static_assert((std::is_same<std::condition_variable::native_handle_type,
+                                pthread_cond_t*>::value), "");
+    std::condition_variable cv;
+    std::condition_variable::native_handle_type h = cv.native_handle();
+    assert(h != nullptr);
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_all.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_all.pass.cpp
new file mode 100644
index 00000000000..fd80ee99c96
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_all.pass.cpp
@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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;
+
+// void notify_all();
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <cassert>
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test0 = 0;
+int test1 = 0;
+int test2 = 0;
+
+void f1()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test1 == 0);
+    while (test1 == 0)
+        cv.wait(lk);
+    assert(test1 == 1);
+    test1 = 2;
+}
+
+void f2()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    while (test2 == 0)
+        cv.wait(lk);
+    assert(test2 == 1);
+    test2 = 2;
+}
+
+int main()
+{
+    std::thread t1(f1);
+    std::thread t2(f2);
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    {
+        std::unique_lock<std::mutex>lk(mut);
+        test1 = 1;
+        test2 = 1;
+    }
+    cv.notify_all();
+    {
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        std::unique_lock<std::mutex>lk(mut);
+    }
+    t1.join();
+    t2.join();
+    assert(test1 == 2);
+    assert(test2 == 2);
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_one.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_one.pass.cpp
new file mode 100644
index 00000000000..6236a13df80
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_one.pass.cpp
@@ -0,0 +1,94 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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;
+
+// void notify_one();
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <cassert>
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test0 = 0;
+int test1 = 0;
+int test2 = 0;
+
+void f1()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test1 == 0);
+    while (test1 == 0)
+        cv.wait(lk);
+    assert(test1 == 1);
+    test1 = 2;
+}
+
+void f2()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    while (test2 == 0)
+        cv.wait(lk);
+    assert(test2 == 1);
+    test2 = 2;
+}
+
+int main()
+{
+    std::thread t1(f1);
+    std::thread t2(f2);
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    {
+        std::unique_lock<std::mutex>lk(mut);
+        test1 = 1;
+        test2 = 1;
+    }
+    cv.notify_one();
+    {
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        std::unique_lock<std::mutex>lk(mut);
+    }
+    if (test1 == 2)
+    {
+        t1.join();
+        test1 = 0;
+    }
+    else if (test2 == 2)
+    {
+        t2.join();
+        test2 = 0;
+    }
+    else
+        assert(false);
+    cv.notify_one();
+    {
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        std::unique_lock<std::mutex>lk(mut);
+    }
+    if (test1 == 2)
+    {
+        t1.join();
+        test1 = 0;
+    }
+    else if (test2 == 2)
+    {
+        t2.join();
+        test2 = 0;
+    }
+    else
+        assert(false);
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait.pass.cpp
new file mode 100644
index 00000000000..236eecc919a
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait.pass.cpp
@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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;
+
+// void wait(unique_lock<mutex>& lock);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <cassert>
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test1 = 0;
+int test2 = 0;
+
+void f()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    test1 = 1;
+    cv.notify_one();
+    while (test2 == 0)
+        cv.wait(lk);
+    assert(test2 != 0);
+}
+
+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();
+}
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();
+    }
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for_pred.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for_pred.pass.cpp
new file mode 100644
index 00000000000..0ee40d161b7
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_for_pred.pass.cpp
@@ -0,0 +1,95 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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, class Predicate>
+//     bool
+//     wait_for(unique_lock<mutex>& lock,
+//              const chrono::duration<Rep, Period>& rel_time,
+//              Predicate pred);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <chrono>
+#include <cassert>
+
+class Pred
+{
+    int& i_;
+public:
+    explicit Pred(int& i) : i_(i) {}
+
+    bool operator()() {return i_ != 0;}
+};
+
+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();
+    bool r = cv.wait_for(lk, milliseconds(250), Pred(test2));
+    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();
+    }
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_pred.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_pred.pass.cpp
new file mode 100644
index 00000000000..45e0b812416
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_pred.pass.cpp
@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 Predicate>
+//   void wait(unique_lock<mutex>& lock, Predicate pred);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <functional>
+#include <cassert>
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test1 = 0;
+int test2 = 0;
+
+class Pred
+{
+    int& i_;
+public:
+    explicit Pred(int& i) : i_(i) {}
+
+    bool operator()() {return i_ != 0;}
+};
+
+void f()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    test1 = 1;
+    cv.notify_one();
+    cv.wait(lk, Pred(test2));
+    assert(test2 != 0);
+}
+
+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();
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until.pass.cpp
new file mode 100644
index 00000000000..d87a188e93d
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until.pass.cpp
@@ -0,0 +1,102 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 Clock, class Duration>
+//   cv_status
+//   wait_until(unique_lock<mutex>& lock,
+//              const chrono::time_point<Clock, Duration>& abs_time);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <chrono>
+#include <cassert>
+
+struct Clock
+{
+    typedef std::chrono::milliseconds duration;
+    typedef duration::rep             rep;
+    typedef duration::period          period;
+    typedef std::chrono::time_point<Clock> time_point;
+    static const bool is_steady =  true;
+
+    static time_point now()
+    {
+        using namespace std::chrono;
+        return time_point(duration_cast<duration>(
+                steady_clock::now().time_since_epoch()
+                                                 ));
+    }
+};
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test1 = 0;
+int test2 = 0;
+
+int runs = 0;
+
+void f()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    test1 = 1;
+    cv.notify_one();
+    Clock::time_point t0 = Clock::now();
+    Clock::time_point t = t0 + Clock::duration(250);
+    while (test2 == 0 && cv.wait_until(lk, t) == std::cv_status::no_timeout)
+        ;
+    Clock::time_point t1 = Clock::now();
+    if (runs == 0)
+    {
+        assert(t1 - t0 < Clock::duration(250));
+        assert(test2 != 0);
+    }
+    else
+    {
+        assert(t1 - t0 - Clock::duration(250) < Clock::duration(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();
+    }
+}
diff --git a/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until_pred.pass.cpp b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until_pred.pass.cpp
new file mode 100644
index 00000000000..90ffb1d0b29
--- /dev/null
+++ b/libcxx/test/std/thread/thread.condition/thread.condition.condvar/wait_until_pred.pass.cpp
@@ -0,0 +1,113 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 Clock, class Duration, class Predicate>
+//     bool
+//     wait_until(unique_lock<mutex>& lock,
+//                const chrono::time_point<Clock, Duration>& abs_time,
+//                Predicate pred);
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <chrono>
+#include <cassert>
+
+struct Clock
+{
+    typedef std::chrono::milliseconds duration;
+    typedef duration::rep             rep;
+    typedef duration::period          period;
+    typedef std::chrono::time_point<Clock> time_point;
+    static const bool is_steady =  true;
+
+    static time_point now()
+    {
+        using namespace std::chrono;
+        return time_point(duration_cast<duration>(
+                steady_clock::now().time_since_epoch()
+                                                 ));
+    }
+};
+
+class Pred
+{
+    int& i_;
+public:
+    explicit Pred(int& i) : i_(i) {}
+
+    bool operator()() {return i_ != 0;}
+};
+
+std::condition_variable cv;
+std::mutex mut;
+
+int test1 = 0;
+int test2 = 0;
+
+int runs = 0;
+
+void f()
+{
+    std::unique_lock<std::mutex> lk(mut);
+    assert(test2 == 0);
+    test1 = 1;
+    cv.notify_one();
+    Clock::time_point t0 = Clock::now();
+    Clock::time_point t = t0 + Clock::duration(250);
+    bool r = cv.wait_until(lk, t, Pred(test2));
+    Clock::time_point t1 = Clock::now();
+    if (runs == 0)
+    {
+        assert(t1 - t0 < Clock::duration(250));
+        assert(test2 != 0);
+        assert(r);
+    }
+    else
+    {
+        assert(t1 - t0 - Clock::duration(250) < Clock::duration(50));
+        assert(test2 == 0);
+        assert(!r);
+    }
+    ++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();
+    }
+}