src/rx/AIX/rx_kmutex.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * rx_kmutex.h - mutex and condition variable macros for kernel environment.
  12  *
  13  * AIX 4.x implementation.
  14  */
  15
  16 #ifndef _RX_KMUTEX_H_
  17 #define _RX_KMUTEX_H_
  18
  19 #ifdef AFS_AIX41_ENV
  20
  21
  22 #undef  LOCK_INIT
  23 #include <sys/lockl.h>
  24 #include <sys/lock_def.h>
  25 #include <sys/lock_alloc.h>
  26 #include <sys/sleep.h>
  27 #define RX_ENABLE_LOCKS         1
  28 /*
  29  * `condition variables' -- well, not really.  these just map to the
  30  * AIX event-list routines.  Thus, if one signals a condition prior to
  31  * a process waiting for it, the signal gets lost.
  32  * Note:
  33  *      `t' in `cv_timedwait' has different interpretation
  34  */
  35 #ifndef CV_DEFAULT
  36 #define CV_DEFAULT      0
  37 #endif
  38 #ifndef MUTEX_DEFAULT
  39 #define MUTEX_DEFAULT   0
  40 #endif
  41 #define CV_INIT(cv, a,b,c)      (*(cv) = EVENT_NULL)
  42 #define CV_DESTROY(cv)
  43 #define CV_SIGNAL(_cv)          e_wakeup_one(_cv)
  44 #define CV_BROADCAST(_cv)       e_wakeup(_cv)
  45 typedef simple_lock_data afs_kmutex_t;
  46 typedef tid_t afs_kcondvar_t;
  47
  48
  49 #define LOCK_INIT(a, b)         lock_alloc((void*)(a), LOCK_ALLOC_PIN, 1, 1), \
  50                                 simple_lock_init((void *)(a))
  51 #define MUTEX_INIT(a,b,c,d)     lock_alloc((void*)(a), LOCK_ALLOC_PIN, 1, 1), \
  52                                 simple_lock_init((void *)(a))
  53 #define MUTEX_DESTROY(a)        lock_free((void*)(a))
  54
  55 #ifdef RX_LOCKS_DB
  56
  57 #define MUTEX_ENTER(a)          simple_lock((void *)(a)), \
  58                                 rxdb_grablock((void *)(a), thread_self(),rxdb_fileID,\
  59                                               __LINE__)
  60
  61 #define MUTEX_TRYENTER(a)       (simple_lock_try((void *)(a)) ?\
  62                                 rxdb_grablock((void *)(a), thread_self(), rxdb_fileID,\
  63                                               __LINE__), 1 : 0)
  64
  65 #define MUTEX_EXIT(a)           rxdb_droplock((void *)(a), thread_self(), rxdb_fileID,\
  66                                               __LINE__), \
  67                                 simple_unlock((void *)(a))
  68
  69 #define CV_WAIT(_cv, _lck) \
  70     do { \
  71         int haveGlock = ISAFS_GLOCK(); \
  72         if (haveGlock) \
  73             AFS_GUNLOCK(); \
  74         rxdb_droplock((void *)(_lck), thread_self(), rxdb_fileID, __LINE__); \
  75         e_sleep_thread((_cv), (_lck), LOCK_SIMPLE); \
  76         rxdb_grablock((void *)(_lck), thread_self(), rxdb_fileID, __LINE__); \
  77         if (haveGlock) { \
  78             MUTEX_EXIT(_lck); \
  79             AFS_GLOCK(); \
  80             MUTEX_ENTER(_lck); \
  81         } \
  82     } while(0)
  83
  84 #define CV_TIMEDWAIT(_cv, _lck, _t) \
  85     do { \
  86         int haveGlock = ISAFS_GLOCK(); \
  87         if (haveGlock) \
  88             AFS_GUNLOCK(); \
  89         rxdb_droplock((void *)(_lck), thread_self(), rxdb_fileID, __LINE__); \
  90         e_mpsleep((_cv), (_t), (_lck), LOCK_SIMPLE); \
  91         rxdb_grablock((void *)(_lck), thread_self(), rxdb_fileID, __LINE__); \
  92         if (haveGlock) { \
  93             MUTEX_EXIT(_lck); \
  94             AFS_GLOCK(); \
  95             MUTEX_ENTER(_lck); \
  96         } \
  97     } while(0)
  98
  99 #else /* RX_LOCK_DB */
 100
 101 #define MUTEX_ENTER(a)          simple_lock((void *)(a))
 102 #define MUTEX_TRYENTER(a)       simple_lock_try((void *)(a))
 103 #define MUTEX_EXIT(a)           simple_unlock((void *)(a))
 104
 105 #define CV_WAIT(_cv, _lck) \
 106     do { \
 107         int haveGlock = ISAFS_GLOCK(); \
 108         if (haveGlock) \
 109             AFS_GUNLOCK(); \
 110         e_sleep_thread((_cv), (_lck), LOCK_SIMPLE); \
 111         if (haveGlock) { \
 112             MUTEX_EXIT(_lck); \
 113             AFS_GLOCK(); \
 114             MUTEX_ENTER(_lck); \
 115         } \
 116     } while(0)
 117
 118 #define CV_TIMEDWAIT(_cv, _lck, _t) \
 119     do { \
 120         int haveGlock = ISAFS_GLOCK(); \
 121         if (haveGlock) \
 122             AFS_GUNLOCK(); \
 123         e_mpsleep((_cv), (_t), (_lck), LOCK_SIMPLE); \
 124         if (haveGlock) { \
 125             MUTEX_EXIT(_lck); \
 126             AFS_GLOCK(); \
 127             MUTEX_ENTER(_lck); \
 128         } \
 129     } while(0)
 130
 131 #endif /* RX_LOCK_DB */
 132
 133 #define MUTEX_DEFAULT   0
 134
 135 #define MUTEX_ASSERT(a) osi_Assert(lock_mine((void *)(a)))
 136
 137 #endif /* AFS_AIX41_ENV */
 138
 139 #endif /* _RX_KMUTEX_H_ */