1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS__TASK_H_ 32 #define _SYS__TASK_H_ 33 34 #include <sys/queue.h> 35 36 /* 37 * Each task includes a function which is called from 38 * taskqueue_run(). The first argument is taken from the 'ta_context' 39 * field of struct task and the second argument is a count of how many 40 * times the task was enqueued before the call to taskqueue_run(). 41 * 42 * List of locks 43 * (c) const after init 44 * (q) taskqueue lock 45 */ 46 typedef void task_fn_t(void *context, int pending); 47 48 struct task { 49 STAILQ_ENTRY(task) ta_link; /* (q) link for queue */ 50 uint16_t ta_pending; /* (q) count times queued */ 51 uint8_t ta_priority; /* (c) Priority */ 52 uint8_t ta_flags; /* (c) Flags */ 53 task_fn_t *ta_func; /* (c) task handler */ 54 void *ta_context; /* (c) argument for handler */ 55 }; 56 57 #define TASK_ENQUEUED 0x1 58 #define TASK_NOENQUEUE 0x2 59 #define TASK_NETWORK 0x4 60 61 #define TASK_IS_NET(ta) ((ta)->ta_flags & TASK_NETWORK) 62 63 #ifdef _KERNEL 64 65 typedef void gtask_fn_t(void *context); 66 67 struct gtask { 68 STAILQ_ENTRY(gtask) ta_link; /* (q) link for queue */ 69 uint16_t ta_flags; /* (q) state flags */ 70 u_short ta_priority; /* (c) Priority */ 71 gtask_fn_t *ta_func; /* (c) task handler */ 72 void *ta_context; /* (c) argument for handler */ 73 }; 74 75 #endif /* _KERNEL */ 76 77 #endif /* !_SYS__TASK_H_ */ 78