xnu-4903.231.4.tar.gz

[apple/xnu.git] / bsd / kern / kern_clock.c

diff --git a/bsd/kern/kern_clock.c b/bsd/kern/kern_clock.c
index 1aae2df47cafbdeda69144c11727970722818ca6..08507cdc593e6c330f3b97ea0f95959cea5dbe97 100644 (file)
--- a/bsd/kern/kern_clock.c
+++ b/bsd/kern/kern_clock.c
@@ -69,8 +69,6 @@
  * HISTORY
  */
 
-#include <machine/spl.h>
-
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/time.h>
@@ -140,8 +138,35 @@ 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.
+ * Deprecated because it's very inefficient.
+ * Switch to an allocated thread call instead.
  */
 void
 untimeout(
@@ -176,6 +201,8 @@ bsd_timeout(
 
 /*
  * Cancel a timeout.
+ * Deprecated because it's very inefficient.
+ * Switch to an allocated thread call instead.
  */
 void
 bsd_untimeout(
@@ -228,15 +255,14 @@ static int
 sysctl_clockrate
 (__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, __unused struct sysctl_req *req)
 {
-       struct clockinfo clkinfo;
+       struct clockinfo clkinfo = {
+               .hz         = hz,
+               .tick       = tick,
+               .tickadj    = 0,
+               .stathz     = hz,
+               .profhz     = hz,
+       };
 
-       /*
-        * Construct clockinfo structure.
-        */
-       clkinfo.hz = hz;
-       clkinfo.tick = tick;
-       clkinfo.profhz = hz;
-       clkinfo.stathz = hz;
        return sysctl_io_opaque(req, &clkinfo, sizeof(clkinfo), NULL);
 }