usr/src/uts/common/sys/t_lock.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) 1991-1998 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 /*
  28  * t_lock.h:    Prototypes for disp_locks, plus include files
  29  *              that describe the interfaces to kernel synch.
  30  *              objects.
  31  */
  32
  33 #ifndef _SYS_T_LOCK_H
  34 #define _SYS_T_LOCK_H
  35
  36 #pragma ident   "%Z%%M% %I%     %E% SMI"
  37
  38 #ifndef _ASM
  39 #include <sys/machlock.h>
  40 #include <sys/param.h>
  41 #include <sys/mutex.h>
  42 #include <sys/rwlock.h>
  43 #include <sys/semaphore.h>
  44 #include <sys/condvar.h>
  45 #endif  /* _ASM */
  46
  47 #ifdef  __cplusplus
  48 extern "C" {
  49 #endif
  50
  51 #ifndef _ASM
  52
  53 /*
  54  * Mutual exclusion locks described in common/sys/mutex.h.
  55  *
  56  * Semaphores described in common/sys/semaphore.h.
  57  *
  58  * Readers/Writer locks described in common/sys/rwlock.h.
  59  *
  60  * Condition variables described in common/sys/condvar.h
  61  */
  62
  63 #if defined(_KERNEL)
  64
  65 extern int ncpus;
  66
  67 /*
  68  * Dispatcher lock type, macros and routines.
  69  *
  70  * disp_lock_t is defined in machlock.h
  71  */
  72 extern  void    disp_lock_enter(disp_lock_t *);
  73 extern  void    disp_lock_exit(disp_lock_t *);
  74 extern  void    disp_lock_exit_nopreempt(disp_lock_t *);
  75 extern  void    disp_lock_enter_high(disp_lock_t *);
  76 extern  void    disp_lock_exit_high(disp_lock_t *);
  77 extern  void    disp_lock_init(disp_lock_t *lp, char *name);
  78 extern  void    disp_lock_destroy(disp_lock_t *lp);
  79
  80 #define DISP_LOCK_INIT(lp)      LOCK_INIT_CLEAR((lock_t *)(lp))
  81 #define DISP_LOCK_HELD(lp)      LOCK_HELD((lock_t *)(lp))
  82 #define DISP_LOCK_DESTROY(lp)   ASSERT(!DISP_LOCK_HELD(lp))
  83
  84 /*
  85  * The following definitions are for assertions which can be checked
  86  * statically by tools like lock_lint.  You can also define your own
  87  * run-time test for each.  If you don't, we define them to 1 so that
  88  * such assertions simply pass.
  89  */
  90 #ifndef NO_LOCKS_HELD
  91 #define NO_LOCKS_HELD   1
  92 #endif
  93 #ifndef NO_COMPETING_THREADS
  94 #define NO_COMPETING_THREADS    1
  95 #endif
  96
  97 #endif  /* defined(_KERNEL) */
  98
  99 #endif  /* _ASM */
 100
 101 #ifdef  __cplusplus
 102 }
 103 #endif
 104
 105 #endif  /* _SYS_T_LOCK_H */