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Annotation of sbbs/xpdev/xpsem.h, revision 1.1

1.1     ! root        1: #ifndef _XPSEM_H_
        !             2: #define _XPSEM_H_
        !             3: 
        !             4: /*
        !             5:  * $Id: xpsem.h,v 1.5 2004/11/22 20:57:46 deuce Exp $
        !             6:  *
        !             7:  * semaphore.h: POSIX 1003.1b semaphores
        !             8: */
        !             9: 
        !            10: /*-
        !            11:  * Copyright (c) 1996, 1997
        !            12:  *     HD Associates, Inc.  All rights reserved.
        !            13:  *
        !            14:  * Redistribution and use in source and binary forms, with or without
        !            15:  * modification, are permitted provided that the following conditions
        !            16:  * are met:
        !            17:  * 1. Redistributions of source code must retain the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer.
        !            19:  * 2. Redistributions in binary form must reproduce the above copyright
        !            20:  *    notice, this list of conditions and the following disclaimer in the
        !            21:  *    documentation and/or other materials provided with the distribution.
        !            22:  * 3. All advertising materials mentioning features or use of this software
        !            23:  *    must display the following acknowledgement:
        !            24:  *     This product includes software developed by HD Associates, Inc
        !            25:  * 4. Neither the name of the author nor the names of any co-contributors
        !            26:  *    may be used to endorse or promote products derived from this software
        !            27:  *    without specific prior written permission.
        !            28:  *
        !            29:  * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
        !            30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            32:  * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
        !            33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            39:  * SUCH DAMAGE.
        !            40:  *
        !            41:  * $FreeBSD: src/sys/posix4/semaphore.h,v 1.6 2000/01/20 07:55:42 jasone Exp $
        !            42:  */
        !            43: 
        !            44: #include <limits.h>
        !            45: 
        !            46: #include <sys/types.h>
        !            47: #include <fcntl.h>
        !            48: #include <pthread.h>
        !            49: 
        !            50: /* Opaque type definition. */
        !            51: struct xp_sem;
        !            52: typedef struct xp_sem *xp_sem_t;
        !            53: 
        !            54: #define SEM_FAILED     ((xp_sem_t *)0)
        !            55: #define SEM_VALUE_MAX  UINT_MAX
        !            56: 
        !            57: #ifdef __solaris__
        !            58: typedef unsigned int   u_int32_t;
        !            59: #endif
        !            60: 
        !            61: #if defined(__cplusplus)
        !            62: extern "C" {
        !            63: #endif
        !            64: int     xp_sem_init (xp_sem_t *, int, unsigned int);
        !            65: int     xp_sem_destroy (xp_sem_t *);
        !            66: xp_sem_t       *sem_open (const char *, int, ...);
        !            67: int     xp_sem_close (xp_sem_t *);
        !            68: int     xp_sem_unlink (const char *);
        !            69: int     xp_sem_wait (xp_sem_t *);
        !            70: int     xp_sem_trywait (xp_sem_t *);
        !            71: int     xp_sem_post (xp_sem_t *);
        !            72: int     xp_sem_getvalue (xp_sem_t *, int *);
        !            73: int  xp_sem_timedwait (xp_sem_t *sem, const struct timespec *abs_timeout);
        !            74: #if defined(__cplusplus)
        !            75: }
        !            76: #endif
        !            77: 
        !            78: /*
        !            79: * $Id: xpsem.h,v 1.5 2004/11/22 20:57:46 deuce Exp $
        !            80: */
        !            81: 
        !            82: /* Begin thread_private.h kluge */
        !            83: /*
        !            84:  * These come out of (or should go into) thread_private.h - rather than have 
        !            85:  * to copy (or symlink) the files from the source tree these definitions are 
        !            86:  * inlined here.  Obviously these go away when this module is part of libc.
        !            87: */
        !            88: 
        !            89: struct xp_sem {
        !            90: #define SEM_MAGIC       ((u_int32_t) 0x09fa4012)
        !            91:         u_int32_t       magic;
        !            92:         pthread_mutex_t lock;
        !            93:         pthread_cond_t  gtzero;
        !            94:         u_int32_t       count;
        !            95:         u_int32_t       nwaiters;
        !            96: };
        !            97: 
        !            98: extern pthread_once_t _thread_init_once;
        !            99: extern int _threads_initialized;
        !           100: extern void  _thread_init (void);
        !           101: #define THREAD_INIT() \
        !           102:        (void) pthread_once(&_thread_init_once, _thread_init)
        !           103: #define THREAD_SAFE() \
        !           104:        (_threads_initialized != 0)
        !           105: 
        !           106: #define _SEM_CHECK_VALIDITY(sem)               \
        !           107:        if (sem==NULL || (*(sem))->magic != SEM_MAGIC) {        \
        !           108:                errno = EINVAL;                 \
        !           109:                retval = -1;                    \
        !           110:                goto RETURN;                    \
        !           111:        }
        !           112: 
        !           113: struct pthread_rwlockattr {
        !           114:         int             pshared;
        !           115:        };
        !           116: 
        !           117: /* End thread_private.h kluge */
        !           118: 
        !           119: #endif /* _XPSEM_H_ */

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