FreeBSD/Linux Kernel Cross Reference
sys/sys/kthread.h
1 /* $NetBSD: kthread.h,v 1.14 2020/08/01 02:04:55 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 2007, 2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center, and by Andrew Doran.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifndef _SYS_KTHREAD_H_
34 #define _SYS_KTHREAD_H_
35
36 #if !defined(_KERNEL)
37 #error "not supposed to be exposed to userland"
38 #endif
39
40 /*
41 * Kernel thread handling.
42 */
43
44 #include <sys/proc.h>
45
46 #define KTHREAD_IDLE 0x01 /* Do not run on creation */
47 #define KTHREAD_MPSAFE 0x02 /* Do not acquire kernel_lock */
48 #define KTHREAD_INTR 0x04 /* Software interrupt handler */
49 #define KTHREAD_TS 0x08 /* Time-sharing priority range */
50 #define KTHREAD_MUSTJOIN 0x10 /* Must join on exit */
51
52 void kthread_sysinit(void);
53
54 int kthread_create(pri_t, int, struct cpu_info *,
55 void (*)(void *), void *, lwp_t **, const char *, ...) __printflike(7, 8);
56 void kthread_exit(int) __dead;
57 int kthread_join(lwp_t *);
58
59 int kthread_fpu_enter(void);
60 void kthread_fpu_exit(int);
61
62 /* Internal MD routines -- for use only by kthread_fpu_enter/exit. */
63 void kthread_fpu_enter_md(void);
64 void kthread_fpu_exit_md(void);
65
66 #endif /* _SYS_KTHREAD_H_ */
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