X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..ecc0ceb4089d506a0b8d16686a95817b331af9cb:/bsd/kern/kern_clock.c

diff --git a/bsd/kern/kern_clock.c b/bsd/kern/kern_clock.c
index 0cbd41e1b..f0e051345 100644
--- a/bsd/kern/kern_clock.c
+++ b/bsd/kern/kern_clock.c
@@ -140,6 +140,31 @@ timeout(
 	thread_call_func_delayed((thread_call_func_t)fcn, param, deadline);
 }
 
+/*
+ *	Set a timeout with leeway.
+ *
+ *	fcn:		function to call
+ *	param:		parameter to pass to function
+ *	interval:	timeout interval, in hz.
+ *	leeway_interval:	leeway interval, in hz.
+ */
+void
+timeout_with_leeway(
+	timeout_fcn_t			fcn,
+	void					*param,
+	int						interval,
+	int						leeway_interval)
+{
+	uint64_t		deadline;
+	uint64_t		leeway;
+
+	clock_interval_to_deadline(interval, NSEC_PER_SEC / hz, &deadline);
+
+	clock_interval_to_absolutetime_interval(leeway_interval, NSEC_PER_SEC / hz, &leeway);
+
+	thread_call_func_delayed_with_leeway((thread_call_func_t)fcn, param, deadline, leeway, THREAD_CALL_DELAY_LEEWAY);
+}
+
 /*
  * Cancel a timeout.
  */
@@ -241,7 +266,7 @@ sysctl_clockrate
 }
 
 SYSCTL_PROC(_kern, KERN_CLOCKRATE, clockrate,
-		CTLTYPE_STRUCT | CTLFLAG_RD,
+		CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
 		0, 0, sysctl_clockrate, "S,clockinfo", "");