| 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 | |