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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/_callout.h>
43 #define CALLOUT_LOCAL_ALLOC 0x0001 /* was allocated from callfree */
44 #define CALLOUT_ACTIVE 0x0002 /* callout is currently active */
45 #define CALLOUT_PENDING 0x0004 /* callout is waiting for timeout */
46 #define CALLOUT_MPSAFE 0x0008 /* callout handler is mp safe */
47 #define CALLOUT_RETURNUNLOCKED 0x0010 /* handler returns with mtx unlocked */
48 #define CALLOUT_SHAREDLOCK 0x0020 /* callout lock held in shared mode */
49 #define CALLOUT_DFRMIGRATION 0x0040 /* callout in deferred migration mode */
50 #define CALLOUT_PROCESSED 0x0080 /* callout in wheel or processing list? */
51 #define CALLOUT_DIRECT 0x0100 /* allow exec from hw int context */
53 #define C_DIRECT_EXEC 0x0001 /* direct execution of callout */
55 #define C_PRELRANGE ((1 << C_PRELBITS) - 1)
56 #define C_PREL(x) (((x) + 1) << 1)
57 #define C_PRELGET(x) (int)((((x) >> 1) & C_PRELRANGE) - 1)
58 #define C_HARDCLOCK 0x0100 /* align to hardclock() calls */
59 #define C_ABSOLUTE 0x0200 /* event time is absolute. */
61 struct callout_handle {
62 struct callout *callout;
66 #define callout_active(c) ((c)->c_flags & CALLOUT_ACTIVE)
67 #define callout_deactivate(c) ((c)->c_flags &= ~CALLOUT_ACTIVE)
68 #define callout_drain(c) _callout_stop_safe(c, 1)
69 void callout_init(struct callout *, int);
70 void _callout_init_lock(struct callout *, struct lock_object *, int);
71 #define callout_init_mtx(c, mtx, flags) \
72 _callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object : \
74 #define callout_init_rm(c, rm, flags) \
75 _callout_init_lock((c), ((rm) != NULL) ? &(rm)->lock_object : \
77 #define callout_init_rw(c, rw, flags) \
78 _callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object : \
80 #define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING)
81 int callout_reset_sbt_on(struct callout *, sbintime_t, sbintime_t,
82 void (*)(void *), void *, int, int);
83 #define callout_reset_sbt(c, sbt, pr, fn, arg, flags) \
84 callout_reset_sbt_on((c), (sbt), (pr), (fn), (arg), (c)->c_cpu, flags)
85 #define callout_reset_sbt_curcpu(c, sbt, pr, fn, arg, flags) \
86 callout_reset_sbt_on((c), (sbt), (pr), (fn), (arg), PCPU_GET(cpuid), flags)
87 #define callout_reset_on(c, to_ticks, fn, arg, cpu) \
88 callout_reset_sbt_on((c), (tick_sbt * (to_ticks)), 0, (fn), (arg), \
90 #define callout_reset(c, on_tick, fn, arg) \
91 callout_reset_on((c), (on_tick), (fn), (arg), (c)->c_cpu)
92 #define callout_reset_curcpu(c, on_tick, fn, arg) \
93 callout_reset_on((c), (on_tick), (fn), (arg), PCPU_GET(cpuid))
94 int callout_schedule(struct callout *, int);
95 int callout_schedule_on(struct callout *, int, int);
96 #define callout_schedule_curcpu(c, on_tick) \
97 callout_schedule_on((c), (on_tick), PCPU_GET(cpuid))
98 #define callout_stop(c) _callout_stop_safe(c, 0)
99 int _callout_stop_safe(struct callout *, int);
100 void callout_process(sbintime_t now);
104 #endif /* _SYS_CALLOUT_H_ */