1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 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 uint16_t ta_pending; /* (q) count times queued */ 49 uint8_t ta_priority; /* (c) Priority */ 50 uint8_t ta_flags; /* (c) Flags */ 51 task_fn_t *ta_func; /* (c) task handler */ 52 void *ta_context; /* (c) argument for handler */ 53 }; 54 55 #define TASK_ENQUEUED 0x1 56 #define TASK_NOENQUEUE 0x2 57 #define TASK_NETWORK 0x4 58 59 #define TASK_IS_NET(ta) ((ta)->ta_flags & TASK_NETWORK) 60 61 #ifdef _KERNEL 62 63 typedef void gtask_fn_t(void *context); 64 65 struct gtask { 66 STAILQ_ENTRY(gtask) ta_link; /* (q) link for queue */ 67 uint16_t ta_flags; /* (q) state flags */ 68 u_short ta_priority; /* (c) Priority */ 69 gtask_fn_t *ta_func; /* (c) task handler */ 70 void *ta_context; /* (c) argument for handler */ 71 }; 72 73 #endif /* _KERNEL */ 74 75 #endif /* !_SYS__TASK_H_ */ 76