Support use of high_res clock in timepoints

1 files changed, 15 insertions, 0 deletions

diff --git a/src/cpp/util/time.cc b/src/cpp/util/time.cc
index 1fef2a56de..83292e9338 100644
--- a/src/cpp/util/time.cc
+++ b/src/cpp/util/time.cc
@@ -42,6 +42,7 @@ using std::chrono::duration_cast;
 using std::chrono::nanoseconds;
 using std::chrono::seconds;
 using std::chrono::system_clock;
+using std::chrono::high_resolution_clock;
 
 namespace grpc {
 
@@ -59,6 +60,20 @@ void Timepoint2Timespec(const system_clock::time_point& from,
   to->tv_nsec = nsecs.count();
 }
 
+void Timepoint2Timespec(const high_resolution_clock::time_point& from,
+			gpr_timespec* to) {
+  high_resolution_clock::duration deadline = from.time_since_epoch();
+  seconds secs = duration_cast<seconds>(deadline);
+  if (from == high_resolution_clock::time_point::max() ||
+      secs.count() >= gpr_inf_future.tv_sec || secs.count() < 0) {
+    *to = gpr_inf_future;
+    return;
+  }
+  nanoseconds nsecs = duration_cast<nanoseconds>(deadline - secs);
+  to->tv_sec = secs.count();
+  to->tv_nsec = nsecs.count();
+}
+
 system_clock::time_point Timespec2Timepoint(gpr_timespec t) {
   if (gpr_time_cmp(t, gpr_inf_future) == 0) {
     return system_clock::time_point::max();