2 * Copyright (c) 1990, 1993
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4 * (c) UNIX System Laboratories, Inc.
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34 * @(#)callout.h 8.2 (Berkeley) 1/21/94
38 #ifndef _SYS_CALLOUT_H_
39 #define _SYS_CALLOUT_H_
41 #include <sys/queue.h>
45 SLIST_HEAD(callout_list, callout);
46 TAILQ_HEAD(callout_tailq, callout);
50 SLIST_ENTRY(callout) sle;
51 TAILQ_ENTRY(callout) tqe;
53 int c_time; /* ticks to the event */
54 void *c_arg; /* function argument */
55 void (*c_func)(void *); /* function to call */
56 struct lock_object *c_lock; /* lock to handle */
57 int c_flags; /* state of this entry */
58 volatile int c_cpu; /* CPU we're scheduled on */
61 #define CALLOUT_LOCAL_ALLOC 0x0001 /* was allocated from callfree */
62 #define CALLOUT_ACTIVE 0x0002 /* callout is currently active */
63 #define CALLOUT_PENDING 0x0004 /* callout is waiting for timeout */
64 #define CALLOUT_MPSAFE 0x0008 /* callout handler is mp safe */
65 #define CALLOUT_RETURNUNLOCKED 0x0010 /* handler returns with mtx unlocked */
66 #define CALLOUT_SHAREDLOCK 0x0020 /* callout lock held in shared mode */
68 struct callout_handle {
69 struct callout *callout;
75 #define callout_active(c) ((c)->c_flags & CALLOUT_ACTIVE)
76 #define callout_deactivate(c) ((c)->c_flags &= ~CALLOUT_ACTIVE)
77 #define callout_drain(c) _callout_stop_safe(c, 1)
78 void callout_init(struct callout *, int);
79 void _callout_init_lock(struct callout *, struct lock_object *, int);
80 #define callout_init_mtx(c, mtx, flags) \
81 _callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object : \
83 #define callout_init_rw(c, rw, flags) \
84 _callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object : \
86 #define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING)
87 int callout_reset_on(struct callout *, int, void (*)(void *), void *, int);
88 #define callout_reset(c, on_tick, fn, arg) \
89 callout_reset_on((c), (on_tick), (fn), (arg), (c)->c_cpu)
90 #define callout_reset_curcpu(c, on_tick, fn, arg) \
91 callout_reset_on((c), (on_tick), (fn), (arg), PCPU_GET(cpuid))
92 int callout_schedule(struct callout *, int);
93 int callout_schedule_on(struct callout *, int, int);
94 #define callout_schedule_curcpu(c, on_tick) \
95 callout_schedule_on((c), (on_tick), PCPU_GET(cpuid))
96 #define callout_stop(c) _callout_stop_safe(c, 0)
97 int _callout_stop_safe(struct callout *, int);
98 void callout_tick(void);
103 #endif /* _SYS_CALLOUT_H_ */