util: Add UnintrruptibleSleep

src/util/time.cpp

@@ -13,8 +13,12 @@
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/thread.hpp>
 #include <ctime>
+#include <thread>
+
 #include <tinyformat.h>
 
+void UninterruptibleSleep(const std::chrono::microseconds& n) { std::this_thread::sleep_for(n); }
+
 static std::atomic<int64_t> nMockTime(0); //!< For unit testing
 
 int64_t GetTime()
@@ -124,4 +128,4 @@ int64_t ParseISO8601DateTime(const std::string& str)
     if (ptime.is_not_a_date_time() || epoch > ptime)
         return 0;
     return (ptime - epoch).total_seconds();
-}
+}

src/util/time.h

@@ -10,6 +10,8 @@
 #include <string>
 #include <chrono>
 
+void UninterruptibleSleep(const std::chrono::microseconds& n);
+
 /**
  * Helper to count the seconds of a duration.
  *