Fix SleepFor(...) helper when a monotonic clock is not available.
Single threaded builds often don't provide a monotonic clock, so we can't
always provide a monotonic SleepFor(...) implementation. Hopefully this
won't cause the builds to hang.
llvm-svn: 273091
diff --git a/libcxx/test/support/filesystem_test_helper.hpp b/libcxx/test/support/filesystem_test_helper.hpp
index fdab4d6..7e3c739 100644
--- a/libcxx/test/support/filesystem_test_helper.hpp
+++ b/libcxx/test/support/filesystem_test_helper.hpp
@@ -388,9 +388,13 @@
// available in single-threaded mode.
void SleepFor(std::chrono::seconds dur) {
using namespace std::chrono;
- const auto curr_time = steady_clock::now();
- auto wake_time = curr_time + dur;
- while (steady_clock::now() < wake_time)
+#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK)
+ using Clock = system_clock;
+#else
+ using Clock = steady_clock;
+#endif
+ const auto wake_time = Clock::now() + dur;
+ while (Clock::now() < wake_time)
;
}