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,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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 */
101 #ifdef CALLOUT_TYPESTABLE
102 #define callout_arg(cc) ((cc)->arg)
104 #define callout_arg(cc) ((cc)->toc.rarg)
106 #ifndef _SYS_SPINLOCK_H_
107 #include <sys/spinlock.h>
112 #define CALLOUT_DEBUG
114 #define CALLOUT_DEBUG_ARGS , const char *ident, int lineno
115 #define CALLOUT_DEBUG_PASSTHRU , ident, lineno
117 #define CALLOUT_DEBUG_ARGS
118 #define CALLOUT_DEBUG_PASSTHRU
125 int callout_active(struct callout *ext);
126 int callout_pending(struct callout *ext);
127 void callout_deactivate(struct callout *ext);
129 void hardclock_softtick(struct globaldata *);
130 void _callout_init (struct callout *cc
132 void _callout_init_mp (struct callout *cc
134 void _callout_init_lk (struct callout *cc, struct lock *lk
136 void callout_reset (struct callout *, int,
137 void (*)(void *), void *);
138 void callout_reset_bycpu (struct callout *, int,
139 void (*)(void *), void *,
141 int callout_stop (struct callout *cc);
142 int callout_stop_async (struct callout *cc);
143 void callout_terminate (struct callout *cc);
144 int callout_cancel (struct callout *cc);
145 int callout_drain (struct callout *cc);
148 #define callout_init(co) _callout_init(co, __FILE__, __LINE__)
149 #define callout_init_mp(co) _callout_init_mp(co, __FILE__, __LINE__)
150 #define callout_init_lk(co, lk) _callout_init_lk(co, lk, __FILE__, __LINE__)
152 #define callout_init(co) _callout_init(co)
153 #define callout_init_mp(co) _callout_init_mp(co)
154 #define callout_init_lk(co, lk) _callout_init_lk(co, lk)
159 #endif /* _SYS_CALLOUT_H_ */