1 files changed, 17 insertions, 0 deletions
diff --git a/main/utils.c b/main/utils.c
index 0ff33cba2..3476729ce 100644
--- a/main/utils.c
+++ b/main/utils.c
@@ -1470,6 +1470,23 @@ struct timeval ast_tvsub(struct timeval a, struct timeval b)
 	}
 	return a;
 }
+
+int ast_remaining_ms(struct timeval start, int max_ms)
+{
+	int ms;
+
+	if (max_ms < 0) {
+		ms = max_ms;
+	} else {
+		ms = max_ms - ast_tvdiff_ms(ast_tvnow(), start);
+		if (ms < 0) {
+			ms = 0;
+		}
+	}
+
+	return ms;
+}
+
 #undef ONE_MILLION
 
 /*! \brief glibc puts a lock inside random(3), so that the results are thread-safe.