1 /* $OpenBSD: task.h,v 1.18 2020/08/01 08:40:20 anton Exp $ */ 2 3 /* 4 * Copyright (c) 2013 David Gwynne <dlg@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _SYS_TASK_H_ 20 #define _SYS_TASK_H_ 21 22 #include <sys/queue.h> 23 24 struct taskq; 25 26 struct task { 27 TAILQ_ENTRY(task) t_entry; 28 void (*t_func)(void *); 29 void *t_arg; 30 unsigned int t_flags; 31 #if 1 /* NKCOV > 0 */ 32 struct process *t_process; 33 #endif 34 }; 35 36 #define TASK_ONQUEUE 1 37 38 TAILQ_HEAD(task_list, task); 39 40 #define TASKQ_MPSAFE (1 << 0) 41 42 #define TASK_INITIALIZER(_f, _a) {{ NULL, NULL }, (_f), (_a), 0 } 43 44 #ifdef _KERNEL 45 extern struct taskq *const systq; 46 extern struct taskq *const systqmp; 47 48 struct taskq *taskq_create(const char *, unsigned int, int, unsigned int); 49 void taskq_destroy(struct taskq *); 50 void taskq_barrier(struct taskq *); 51 52 void taskq_del_barrier(struct taskq *, struct task *); 53 54 void task_set(struct task *, void (*)(void *), void *); 55 int task_add(struct taskq *, struct task *); 56 int task_del(struct taskq *, struct task *); 57 58 #define task_pending(_t) ((_t)->t_flags & TASK_ONQUEUE) 59 60 #endif /* _KERNEL */ 61 62 #endif /* _SYS_TASK_H_ */ 63