Add tests for waiting for the future using both std::chrono::steady_clock
and std::chrono::system_clock in preparation for dealing with those clocks
properly in futex.cc.
---
libstdc++-v3/testsuite/30_threads/async/async.cc | 33 ++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/libstdc++-v3/testsuite/30_threads/async/async.cc
b/libstdc++-v3/testsuite/30_threads/async/async.cc
index 4c2cdd1a534..015bcce0c2c 100644
--- a/libstdc++-v3/testsuite/30_threads/async/async.cc
+++ b/libstdc++-v3/testsuite/30_threads/async/async.cc
@@ -51,17 +51,50 @@ void test02()
VERIFY( status == std::future_status::timeout );
status = f1.wait_until(std::chrono::system_clock::now());
VERIFY( status == std::future_status::timeout );
+ status = f1.wait_until(std::chrono::steady_clock::now());
+ VERIFY( status == std::future_status::timeout );
l.unlock(); // allow async thread to proceed
f1.wait(); // wait for it to finish
status = f1.wait_for(std::chrono::milliseconds(0));
VERIFY( status == std::future_status::ready );
status = f1.wait_until(std::chrono::system_clock::now());
VERIFY( status == std::future_status::ready );
+ status = f1.wait_until(std::chrono::steady_clock::now());
+ VERIFY( status == std::future_status::ready );
+}
+
+// This test is prone to failures if run on a loaded machine where the
+// kernel decides not to schedule us for several seconds. It also
+// assumes that no-one will warp CLOCK whilst the test is
+// running.
+template<typename CLOCK>
+void test03()
+{
+ auto const start = CLOCK::now();
+ future<void> f1 = async(launch::async, []() {
+ std::this_thread::sleep_for(std::chrono::seconds(2));
+ });
+ std::future_status status;
+
+ status = f1.wait_for(std::chrono::milliseconds(500));
+ VERIFY( status == std::future_status::timeout );
+
+ status = f1.wait_until(start + std::chrono::seconds(1));
+ VERIFY( status == std::future_status::timeout );
+
+ status = f1.wait_until(start + std::chrono::seconds(5));
+ VERIFY( status == std::future_status::ready );
+
+ auto const elapsed = CLOCK::now() - start;
+ VERIFY( elapsed >= std::chrono::seconds(2) );
+ VERIFY( elapsed < std::chrono::seconds(5) );
}
int main()
{
test01();
test02();
+ test03<std::chrono::system_clock>();
+ test03<std::chrono::steady_clock>();
return 0;
}
--
2.11.0
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