1 files changed, 6 insertions, 0 deletions
diff --git a/src/benchmark.h b/src/benchmark.h
index 40bd60240d..bcc07c7dbf 100644
--- a/src/benchmark.h
+++ b/src/benchmark.h
@@ -47,3 +47,9 @@ extern int benchmark_must_finish;
 void start_benchmark(struct benchmark_st * st);
 double stop_benchmark(struct benchmark_st * st, const char* metric);
 
+inline static unsigned int
+timespec_sub_ms (struct timespec *a, struct timespec *b)
+{
+  return (a->tv_sec * 1000 + a->tv_nsec / (1000 * 1000) -
+          (b->tv_sec * 1000 + b->tv_nsec / (1000 * 1000)));
+}