FreeBSD/Linux Kernel Cross Reference
sys/sys/_semaphore.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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.
     *
     *      $FreeBSD$
     */
    #ifndef __SEMAPHORE_H_
    #define __SEMAPHORE_H_
    
    typedef intptr_t semid_t;
    struct timespec;
    
    #define SEM_VALUE_MAX  __INT_MAX
    
    #ifndef _KERNEL
    
    __BEGIN_DECLS
    
    int ksem_close(semid_t id);
    int ksem_post(semid_t id);
    int ksem_wait(semid_t id);
    int ksem_trywait(semid_t id);
    int ksem_timedwait(semid_t id, const struct timespec *abstime);
    int ksem_init(semid_t *idp, unsigned int value);
    int ksem_open(semid_t *idp, const char *name, int oflag, mode_t mode,
        unsigned int value);
    int ksem_unlink(const char *name);
    int ksem_getvalue(semid_t id, int *val);
    int ksem_destroy(semid_t id);
    
    __END_DECLS
    
    #endif /* !_KERNEL */
    
    #endif /* __SEMAPHORE_H_ */

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