1 files changed, 29 insertions, 0 deletions
diff --git a/src/boost/libs/thread/test/test_9856.cpp b/src/boost/libs/thread/test/test_9856.cpp
new file mode 100644
index 000000000..b7dcc6e37
--- /dev/null
+++ b/src/boost/libs/thread/test/test_9856.cpp
@@ -0,0 +1,29 @@
+#include "boost/atomic.hpp"
+#include "boost/thread.hpp"
+#include <iostream>
+
+using namespace boost;
+
+int main() {
+    atomic<size_t> total(0), failures(0);
+
+#pragma omp parallel shared(total, failures) num_threads(1000)
+    {
+      mutex mtx;
+      condition_variable cond;
+      unique_lock<mutex> lk(mtx);
+      for (int i = 0; i < 500; i++) {
+        ++total;
+        if (cv_status::timeout != cond.wait_for(lk, chrono::milliseconds(10)))
+          ++failures;
+      }
+    }
+    if(failures)
+      std::cout << "There were " << failures << " failures out of " << total << " timed waits." << std::endl;
+    if((100*failures)/total>40)
+    {
+      std::cerr << "This exceeds 10%, so failing the test." << std::endl;
+      return 1;
+    }
+    return 0;
+}