Add tests to show that std::condition_variable::wait_until and
std::condition_variable::wait_for don't suffer from libstdc++/PR116586.
libstdc++-v3/ChangeLog:
* testsuite/30_threads/condition_variable/members/116586.c: New test.
Signed-off-by: Mike Crowe <[email protected]>
---
.../condition_variable/members/116586.cc | 58 +++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644
libstdc++-v3/testsuite/30_threads/condition_variable/members/116586.cc
diff --git
a/libstdc++-v3/testsuite/30_threads/condition_variable/members/116586.cc
b/libstdc++-v3/testsuite/30_threads/condition_variable/members/116586.cc
new file mode 100644
index 00000000000..d10f8036bb6
--- /dev/null
+++ b/libstdc++-v3/testsuite/30_threads/condition_variable/members/116586.cc
@@ -0,0 +1,58 @@
+// { dg-do run { target c++11 } }
+
+#include <chrono>
+#include <mutex>
+#include <testsuite_hooks.h>
+
+namespace chrono = std::chrono;
+
+// thread.timedmutex.requirements.general:
+// If abs_time has already passed, the function attempts to obtain
+// ownership without blocking (as if by calling try_lock()).
+
+template <typename Clock>
+void
+test_absolute(chrono::nanoseconds offset)
+{
+ std::mutex mtx;
+ std::condition_variable cv;
+ chrono::time_point<Clock> tp(offset);
+ std::unique_lock lock(mtx);
+ // Doesn't cope with spurious wakeup
+ VERIFY(cv.wait_until(lock, tp) == std::cv_status::timeout);
+}
+
+// The type of clock used for the actual wait depends on whether
+// _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK is defined. We might as well just test
+// both steady_clock and system_clock.
+template <typename Clock>
+void
+test_relative(chrono::nanoseconds offset)
+{
+ std::mutex mtx;
+ std::condition_variable cv;
+ const auto d = -Clock::now().time_since_epoch() + offset;
+ std::unique_lock lock(mtx);
+ // Doesn't cope with spurious wakeup
+ VERIFY(cv.wait_for(lock, d) == std::cv_status::timeout);
+}
+
+int main()
+{
+ // It's not really possible to arrange for the relative calls to have
+ // tv_nsec == 0 due to time advancing.
+ for (const chrono::nanoseconds offset : {
+ // tv_sec == 0, tv_nsec == 0
+ chrono::nanoseconds{0},
+ // tv_sec == 0, tv_nsec < 0
+ chrono::duration_cast<chrono::nanoseconds>(chrono::milliseconds{-10}),
+ // tv_sec < 0
+ chrono::duration_cast<chrono::nanoseconds>(chrono::seconds{-10})
+ }) {
+ test_absolute<chrono::system_clock>(offset);
+ test_relative<chrono::system_clock>(offset);
+
+ test_absolute<chrono::steady_clock>(offset);
+ test_relative<chrono::steady_clock>(offset);
+ }
+}
--
2.39.5
