1*01631912SAugustin Cavalier /*- 2*01631912SAugustin Cavalier * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3*01631912SAugustin Cavalier * 4*01631912SAugustin Cavalier * Copyright (c) 2000 Doug Rabson 5*01631912SAugustin Cavalier * All rights reserved. 6*01631912SAugustin Cavalier * 7*01631912SAugustin Cavalier * Redistribution and use in source and binary forms, with or without 8*01631912SAugustin Cavalier * modification, are permitted provided that the following conditions 9*01631912SAugustin Cavalier * are met: 10*01631912SAugustin Cavalier * 1. Redistributions of source code must retain the above copyright 11*01631912SAugustin Cavalier * notice, this list of conditions and the following disclaimer. 12*01631912SAugustin Cavalier * 2. Redistributions in binary form must reproduce the above copyright 13*01631912SAugustin Cavalier * notice, this list of conditions and the following disclaimer in the 14*01631912SAugustin Cavalier * documentation and/or other materials provided with the distribution. 15*01631912SAugustin Cavalier * 16*01631912SAugustin Cavalier * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*01631912SAugustin Cavalier * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*01631912SAugustin Cavalier * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*01631912SAugustin Cavalier * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*01631912SAugustin Cavalier * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*01631912SAugustin Cavalier * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*01631912SAugustin Cavalier * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*01631912SAugustin Cavalier * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*01631912SAugustin Cavalier * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*01631912SAugustin Cavalier * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*01631912SAugustin Cavalier * SUCH DAMAGE. 27*01631912SAugustin Cavalier * 28*01631912SAugustin Cavalier * $FreeBSD$ 29dba28784SAugustin Cavalier */ 30dba28784SAugustin Cavalier 31*01631912SAugustin Cavalier #ifndef _SYS__TASK_H_ 32*01631912SAugustin Cavalier #define _SYS__TASK_H_ 33dba28784SAugustin Cavalier 34*01631912SAugustin Cavalier #include <sys/queue.h> 35dba28784SAugustin Cavalier 36*01631912SAugustin Cavalier /* 37*01631912SAugustin Cavalier * Each task includes a function which is called from 38*01631912SAugustin Cavalier * taskqueue_run(). The first argument is taken from the 'ta_context' 39*01631912SAugustin Cavalier * field of struct task and the second argument is a count of how many 40*01631912SAugustin Cavalier * times the task was enqueued before the call to taskqueue_run(). 41*01631912SAugustin Cavalier * 42*01631912SAugustin Cavalier * List of locks 43*01631912SAugustin Cavalier * (c) const after init 44*01631912SAugustin Cavalier * (q) taskqueue lock 45*01631912SAugustin Cavalier */ 46*01631912SAugustin Cavalier typedef void task_fn_t(void *context, int pending); 47dba28784SAugustin Cavalier 48dba28784SAugustin Cavalier struct task { 49*01631912SAugustin Cavalier STAILQ_ENTRY(task) ta_link; /* (q) link for queue */ 50*01631912SAugustin Cavalier uint16_t ta_pending; /* (q) count times queued */ 51*01631912SAugustin Cavalier uint8_t ta_priority; /* (c) Priority */ 52*01631912SAugustin Cavalier uint8_t ta_flags; /* (c) Flags */ 53*01631912SAugustin Cavalier task_fn_t *ta_func; /* (c) task handler */ 54*01631912SAugustin Cavalier void *ta_context; /* (c) argument for handler */ 55dba28784SAugustin Cavalier }; 56dba28784SAugustin Cavalier 57*01631912SAugustin Cavalier #define TASK_ENQUEUED (1<<0) 58*01631912SAugustin Cavalier #define TASK_NOENQUEUE (1<<1) 59*01631912SAugustin Cavalier #define TASK_SKIP_WAKEUP (1<<2) 608548a4adSAugustin Cavalier 61*01631912SAugustin Cavalier #define TASK_NEEDSGIANT (1<<3) /* Haiku extension, OpenBSD compatibility */ 628548a4adSAugustin Cavalier 63*01631912SAugustin Cavalier #endif /* !_SYS__TASK_H_ */ 64