1 | /* $NetBSD: ksem.h,v 1.14 2012/11/25 01:05:04 christos Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org> |
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_KSEM_H_ |
30 | #define _SYS_KSEM_H_ |
31 | |
32 | #include <sys/cdefs.h> |
33 | |
34 | struct timespec; |
35 | |
36 | #ifdef _KERNEL |
37 | #define KSEM_MAX 128 |
38 | |
39 | typedef struct ksem { |
40 | LIST_ENTRY(ksem) ks_entry; /* global list entry */ |
41 | kmutex_t ks_lock; /* lock on this ksem */ |
42 | kcondvar_t ks_cv; /* condition variable */ |
43 | u_int ks_ref; /* number of references */ |
44 | u_int ks_value; /* current value */ |
45 | u_int ks_waiters; /* number of waiters */ |
46 | char * ks_name; /* name, if named */ |
47 | size_t ks_namelen; /* length of name */ |
48 | int ks_flags; /* for KS_UNLINKED */ |
49 | mode_t ks_mode; /* protection bits */ |
50 | uid_t ks_uid; /* creator uid */ |
51 | gid_t ks_gid; /* creator gid */ |
52 | } ksem_t; |
53 | |
54 | int do_ksem_init(struct lwp *, unsigned int, intptr_t *, copyout_t); |
55 | int do_ksem_open(struct lwp *, const char *, int, mode_t, unsigned int, |
56 | intptr_t *, copyout_t); |
57 | int do_ksem_wait(struct lwp *, intptr_t, bool, struct timespec *); |
58 | |
59 | extern int ksem_max; |
60 | #endif |
61 | |
62 | #ifdef _LIBC |
63 | __BEGIN_DECLS |
64 | int _ksem_close(intptr_t); |
65 | int _ksem_destroy(intptr_t); |
66 | int _ksem_getvalue(intptr_t, int *); |
67 | int _ksem_init(unsigned int, intptr_t *); |
68 | int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *); |
69 | int _ksem_post(intptr_t); |
70 | int _ksem_timedwait(intptr_t, const struct timespec * __restrict); |
71 | int _ksem_trywait(intptr_t); |
72 | int _ksem_unlink(const char *); |
73 | int _ksem_wait(intptr_t); |
74 | __END_DECLS |
75 | #endif /* _LIBC */ |
76 | |
77 | #endif /* _SYS_KSEM_H_ */ |
78 | |