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