xnu-2422.1.72.tar.gz

[apple/xnu.git] / osfmk / kern / mk_timer.c

diff --git a/osfmk/kern/mk_timer.c b/osfmk/kern/mk_timer.c
index f0dd81cc9aa304022bde55e367e83be4d12933ed..fdb6174dd2487769b40b3dec1149e7316494bdf2 100644 (file)
--- a/osfmk/kern/mk_timer.c
+++ b/osfmk/kern/mk_timer.c
@@ -244,12 +244,12 @@ kern_return_t
 mk_timer_arm_trap(
        struct mk_timer_arm_trap_args *args)
 {
-       mach_port_name_t        name = args->name;
+       mach_port_name_t                name = args->name;
        uint64_t                        expire_time = args->expire_time;
        mk_timer_t                      timer;
        ipc_space_t                     myspace = current_space();
        ipc_port_t                      port;
-       kern_return_t           result;
+       kern_return_t                   result;
 
        result = ipc_port_translate_receive(myspace, name, &port);
        if (result != KERN_SUCCESS)
@@ -258,6 +258,7 @@ mk_timer_arm_trap(
        if (ip_kotype(port) == IKOT_TIMER) {
                timer = (mk_timer_t)port->ip_kobject;
                assert(timer != NULL);
+
                simple_lock(&timer->lock);
                assert(timer->port == port);
                ip_unlock(port);
@@ -265,8 +266,15 @@ mk_timer_arm_trap(
                if (!timer->is_dead) {
                        timer->is_armed = TRUE;
 
-                       if (!thread_call_enter_delayed(&timer->call_entry, expire_time))
-                               timer->active++;
+                       if (expire_time > mach_absolute_time()) {
+                               if (!thread_call_enter_delayed_with_leeway(&timer->call_entry, NULL,
+                                                                          expire_time, 0, THREAD_CALL_DELAY_USER_NORMAL))
+                                       timer->active++;
+                       }
+                       else {
+                               if (!thread_call_enter1(&timer->call_entry, NULL))
+                                       timer->active++;
+                       }
                }
 
                simple_unlock(&timer->lock);