usr/src/uts/common/sys/lwp_upimutex_impl.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 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_LWP_UPIMUTEX_IMPL_H
  28 #define _SYS_LWP_UPIMUTEX_IMPL_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/thread.h>
  33 #include <sys/lwp.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 typedef struct upimutex upimutex_t;
  40 typedef struct upib upib_t;
  41
  42 struct upib {
  43         kmutex_t upib_lock;
  44         upimutex_t *upib_first;
  45 };
  46
  47 struct upimutex {
  48         struct _kthread *upi_owner;  /* owner */
  49         int     upi_waiter; /* wait bit */
  50         upib_t *upi_upibp; /* point back to upib bucket in hash chain */
  51         lwp_mutex_t *upi_vaddr;   /* virtual address, i.e. user lock ptr */
  52         lwpchan_t  upi_lwpchan;  /* lwpchan of virtual address */
  53         upimutex_t *upi_nextchain; /* next in hash chain */
  54         upimutex_t *upi_nextowned; /* list of mutexes owned by lwp */
  55 };
  56
  57 #define UPILWPCHAN_BITS         9
  58 #define UPILWPCHAN_TABSIZ       (1 << UPILWPCHAN_BITS)
  59 #define UPIMUTEX_TABSIZE        UPILWPCHAN_TABSIZ
  60 #define UPILWPCHAN_HASH(lwpchan)        \
  61         (((uintptr_t)((lwpchan).lc_wchan0)^(uintptr_t)((lwpchan).lc_wchan)) ^ \
  62         (((uintptr_t)((lwpchan).lc_wchan0)^(uintptr_t)((lwpchan).lc_wchan)) >> \
  63         UPILWPCHAN_BITS)) & (UPIMUTEX_TABSIZE - 1)
  64 #define UPI_CHAIN(lwpchan)      upimutextab[UPILWPCHAN_HASH((lwpchan))]
  65
  66 #define UPIMUTEX_TRY    1
  67 #define UPIMUTEX_BLOCK  0
  68
  69 #ifdef _KERNEL
  70 extern void upimutex_cleanup();
  71 #endif  /* _KERNEL */
  72
  73 #ifdef  __cplusplus
  74 }
  75 #endif
  76
  77 #endif  /* _SYS_LWP_UPIMUTEX_IMPL_H */