LCOM1920-T02G10

/*        $NetBSD: ksem.h,v 1.14 2012/11/25 01:05:04 christos Exp $        */

/*

 * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#ifndef _SYS_KSEM_H_

#define _SYS_KSEM_H_

#include <sys/cdefs.h>

struct timespec;

#ifdef _KERNEL

#define        KSEM_MAX        128

typedef struct ksem {

        LIST_ENTRY(ksem)        ks_entry;        /* global list entry */

        kmutex_t                ks_lock;        /* lock on this ksem */

        kcondvar_t                ks_cv;                /* condition variable */

        u_int                        ks_ref;                /* number of references */

        u_int                        ks_value;        /* current value */

        u_int                        ks_waiters;        /* number of waiters */

        char *                        ks_name;        /* name, if named */

        size_t                        ks_namelen;        /* length of name */

        int                        ks_flags;        /* for KS_UNLINKED */

        mode_t                        ks_mode;        /* protection bits */

        uid_t                        ks_uid;                /* creator uid */

        gid_t                        ks_gid;                /* creator gid */

} ksem_t;

int do_ksem_init(struct lwp *, unsigned int, intptr_t *, copyout_t);

int do_ksem_open(struct lwp *, const char *, int, mode_t, unsigned int,

    intptr_t *, copyout_t);

int do_ksem_wait(struct lwp *, intptr_t, bool, struct timespec *);

extern int        ksem_max;

#endif

#ifdef _LIBC

__BEGIN_DECLS

int _ksem_close(intptr_t);

int _ksem_destroy(intptr_t);

int _ksem_getvalue(intptr_t, int *);

int _ksem_init(unsigned int, intptr_t *);

int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *);

int _ksem_post(intptr_t);

int _ksem_timedwait(intptr_t, const struct timespec * __restrict);

int _ksem_trywait(intptr_t);

int _ksem_unlink(const char *);

int _ksem_wait(intptr_t);

__END_DECLS

#endif /* _LIBC */

#endif /* _SYS_KSEM_H_ */