2 * Copyright (c) 2014,2018,2019 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #ifndef _SYS_CALLOUT_H_
36 #define _SYS_CALLOUT_H_
39 #include <sys/queue.h>
44 #ifndef _SYS_SPINLOCK_H_
45 #include <sys/spinlock.h>
49 * WITH TYPESTABLE (currently disabled)
51 * This is a mechanism to use a separate internal _callout structure
52 * for kern_timeout's internals instead of embedding. At the moment
53 * it doesn't work properly because tsleep() is using a temporary callout
54 * and can't afford to block on setup.
56 * WITHOUT TYPESTABLE <---
58 * Without typestable we embed the internal _callout structure within
59 * the external callout structure. We will still use the verifier to
60 * try to catch corruption.
63 #undef CALLOUT_TYPESTABLE
67 TAILQ_ENTRY(_callout) entry;
68 struct callout *verifier;
74 struct softclock_pcpu *rsc; /* request info */
76 void (*rfunc)(void *);
80 struct softclock_pcpu *qsc; /* active info */
82 void (*qfunc)(void *);
88 #ifdef CALLOUT_TYPESTABLE
89 struct _callout *toc; /* opaque internal structure */
90 uint32_t flags; /* initial flags */
91 uint32_t lineno; /* debugging */
92 struct lock *lk; /* interlock */
93 const char *ident; /* debugging */
94 void *arg; /* ONLY used for callout_arg() XXX */
102 * Legacy access/setting of the function and argument. Used only
103 * by netgraph7 and ieee80211_dfs.c. DO NOT USE FOR NEW CODE!
105 #ifdef CALLOUT_TYPESTABLE
106 #define callout_set_arg(cc, _arg) ((cc)->qarg = (_arg))
107 #define callout_arg(cc) ((cc)->qarg)
108 #define callout_func(cc) ((cc)->qfunc)
110 #define callout_set_arg(cc, _arg) ((cc)->toc.qarg = (_arg))
111 #define callout_arg(cc) ((cc)->toc.qarg)
112 #define callout_func(cc) ((cc)->toc.qfunc)
117 #define CALLOUT_DEBUG
119 #define CALLOUT_DEBUG_ARGS , const char *ident, int lineno
120 #define CALLOUT_DEBUG_PASSTHRU , ident, lineno
122 #define CALLOUT_DEBUG_ARGS
123 #define CALLOUT_DEBUG_PASSTHRU
130 int callout_active(struct callout *ext);
131 int callout_pending(struct callout *ext);
132 void callout_deactivate(struct callout *ext);
134 void hardclock_softtick(struct globaldata *);
135 void _callout_init (struct callout *cc
137 void _callout_init_mp (struct callout *cc
139 void _callout_init_lk (struct callout *cc, struct lock *lk
141 void callout_reset (struct callout *, int,
142 void (*)(void *), void *);
143 void callout_reset_bycpu (struct callout *, int,
144 void (*)(void *), void *,
146 int callout_stop (struct callout *cc);
147 int callout_stop_async (struct callout *cc);
148 void callout_terminate (struct callout *cc);
149 int callout_cancel (struct callout *cc);
150 int callout_drain (struct callout *cc);
153 #define callout_init(co) _callout_init(co, __FILE__, __LINE__)
154 #define callout_init_mp(co) _callout_init_mp(co, __FILE__, __LINE__)
155 #define callout_init_lk(co, lk) _callout_init_lk(co, lk, __FILE__, __LINE__)
157 #define callout_init(co) _callout_init(co)
158 #define callout_init_mp(co) _callout_init_mp(co)
159 #define callout_init_lk(co, lk) _callout_init_lk(co, lk)
164 #endif /* _SYS_CALLOUT_H_ */