usr/src/uts/common/sys/semaphore.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1993-1998 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _SYS_SEMAPHORE_H
  28 #define _SYS_SEMAPHORE_H
  29
  30 /*
  31  * Public interface to semaphores.  See semaphore(9F) for details.
  32  */
  33
  34 #ifndef _ASM
  35
  36 #ifdef _KERNEL
  37 #include <sys/thread.h>
  38 #endif
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 typedef enum {
  45         SEMA_DEFAULT,
  46         SEMA_DRIVER
  47 } ksema_type_t;
  48
  49 typedef struct _ksema {
  50         void    * _opaque[2];   /* 2 words on 4 byte alignment */
  51 } ksema_t;
  52
  53 #if defined(_KERNEL)
  54
  55 #define SEMA_HELD(x)            (sema_held((x)))
  56
  57 extern  void    sema_init(ksema_t *, uint32_t, char *, ksema_type_t, void *);
  58 extern  void    sema_destroy(ksema_t *);
  59 extern  void    sema_p(ksema_t *);
  60 extern  int     sema_p_sig(ksema_t *);
  61 extern  void    sema_v(ksema_t *);
  62 extern  int     sema_tryp(ksema_t *);
  63 extern  int     sema_held(ksema_t *);
  64
  65 #endif  /* defined(_KERNEL) */
  66
  67 #ifdef  __cplusplus
  68 }
  69 #endif
  70
  71 #endif  /* _ASM */
  72
  73 #endif  /* _SYS_SEMAPHORE_H */