FreeBSD/Linux Kernel Cross Reference
sys/sys/kse.h
1 /*
2 * Copyright (C) 2001 Julian Elischer <julian@freebsd.org>
3 * for the FreeBSD Foundation.
4 *
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(s), this list of conditions and the following disclaimer as
12 * the first lines of this file unmodified other than the possible
13 * addition of one or more copyright notices.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice(s), this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
28 * DAMAGE.
29 *
30 * $FreeBSD: releng/5.2/sys/sys/kse.h 118486 2003-08-05 12:00:55Z davidxu $
31 */
32
33 #ifndef _SYS_KSE_H_
34 #define _SYS_KSE_H_
35
36 #include <machine/kse.h>
37 #include <sys/ucontext.h>
38 #include <sys/time.h>
39 #include <sys/signal.h>
40
41 /*
42 * This file defines the structures needed for communication between
43 * the userland and the kernel when running a KSE-based threading system.
44 * The only programs that should see this file are the user thread
45 * scheduler (UTS) and the kernel.
46 */
47 struct kse_mailbox;
48
49 typedef void kse_func_t(struct kse_mailbox *);
50
51 /*
52 * Thread mailbox.
53 *
54 * This describes a user thread to the kernel scheduler.
55 */
56 struct kse_thr_mailbox {
57 ucontext_t tm_context; /* User and machine context */
58 unsigned int tm_flags; /* Thread flags */
59 struct kse_thr_mailbox *tm_next; /* Next thread in list */
60 void *tm_udata; /* For use by the UTS */
61 uint32_t tm_uticks;
62 uint32_t tm_sticks;
63 siginfo_t tm_syncsig;
64 int tm_spare[8];
65 };
66
67 /*
68 * KSE mailbox.
69 *
70 * Communication path between the UTS and the kernel scheduler specific to
71 * a single KSE.
72 */
73 struct kse_mailbox {
74 int km_version; /* Mailbox version */
75 struct kse_thr_mailbox *km_curthread; /* Currently running thread */
76 struct kse_thr_mailbox *km_completed; /* Threads back from kernel */
77 sigset_t km_sigscaught; /* Caught signals */
78 uint32_t km_flags; /* KSE flags */
79 kse_func_t *km_func; /* UTS function */
80 stack_t km_stack; /* UTS context */
81 void *km_udata; /* For use by the UTS */
82 struct timespec km_timeofday; /* Time of day */
83 int km_quantum; /* Upcall quantum in msecs */
84 int km_spare[8];
85 };
86
87 #define KSE_VER_0 0
88 #define KSE_VERSION KSE_VER_0
89
90 /* These flags are kept in km_flags */
91 #define KMF_NOUPCALL 0x01
92 #define KMF_NOCOMPLETED 0x02
93 #define KMF_DONE 0x04
94 #define KMF_BOUND 0x08
95 #define KMF_WAITSIGEVENT 0x10
96
97 /* These flags are kept in tm_flags */
98 #define TMF_NOUPCALL 0x01
99
100 /* Commands for kse_thr_interrupt */
101 #define KSE_INTR_INTERRUPT 0x01
102 #define KSE_INTR_RESTART 0x02
103 #define KSE_INTR_SENDSIG 0x03
104 #define KSE_INTR_SIGEXIT 0x04
105
106 #ifndef _KERNEL
107 int kse_create(struct kse_mailbox *, int);
108 int kse_exit(void);
109 int kse_release(struct timespec *);
110 int kse_thr_interrupt(struct kse_thr_mailbox *, int, long);
111 int kse_wakeup(struct kse_mailbox *);
112 #endif /* !_KERNEL */
113
114 #endif /* !_SYS_KSE_H_ */
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