usr/src/lib/libfakekernel/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  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  27  */
  28
  29 #ifndef _SYS_SEMAPHORE_H
  30 #define _SYS_SEMAPHORE_H
  31
  32 /*
  33  * Public interface to semaphores.  See semaphore(9F) for details.
  34  */
  35
  36 #include <sys/synch.h>  /* lwp_sema_t */
  37
  38 #ifdef  __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 typedef enum {
  43         SEMA_DEFAULT,
  44         SEMA_DRIVER
  45 } ksema_type_t;
  46
  47 typedef lwp_sema_t ksema_t;
  48
  49 #define SEMA_HELD(x)            (sema_held((x)))
  50
  51 /*
  52  * We're simulating the kernel mutex API here, and the
  53  * user-level has a different signature, so rename.
  54  */
  55
  56 #define sema_init       ksema_init
  57 #define sema_destroy    ksema_destroy
  58
  59 extern  void    ksema_init(ksema_t *, uint32_t, char *, ksema_type_t, void *);
  60 extern  void    ksema_destroy(ksema_t *);
  61
  62 extern  void    sema_p(ksema_t *);
  63 extern  int     sema_p_sig(ksema_t *);
  64 extern  void    sema_v(ksema_t *);
  65 extern  int     sema_tryp(ksema_t *);
  66 extern  int     sema_held(ksema_t *);
  67
  68 #ifdef  __cplusplus
  69 }
  70 #endif
  71
  72 #endif  /* _SYS_SEMAPHORE_H */