src/rx/FBSD/rx_kmutex.h

   1 /* Copyright Transarc Corporation 1998 - All Rights Reserved
   2  *
   3  * rx_kmutex.h - mutex and condition variable macros for kernel environment.
   4  *
   5  * DUX implementation.
   6  */
   7
   8 #ifndef _RX_KMUTEX_H_
   9 #define _RX_KMUTEX_H_
  10
  11 #ifdef AFS_FBSD40_ENV
  12
  13 #include <sys/lock.h>
  14 /* #include <kern/sched_prim.h> */
  15 /* #include <sys/unix_defs.h> */
  16
  17 #define RX_ENABLE_LOCKS         1
  18 #define AFS_GLOBAL_RXLOCK_KERNEL
  19
  20 /*
  21  * Condition variables
  22  *
  23  * In Digital Unix (OSF/1), we use something akin to the ancient sleep/wakeup
  24  * mechanism.  The condition variable itself plays no role; we just use its
  25  * address as a convenient unique number.
  26  */
  27 #define CV_INIT(cv,a,b,c)
  28 #define CV_DESTROY(cv)
  29 #define CV_WAIT(cv, lck)    { \
  30                                 int isGlockOwner = ISAFS_GLOCK(); \
  31                                 if (isGlockOwner) AFS_GUNLOCK();  \
  32                                 assert_wait((vm_offset_t)(cv), 0);      \
  33                                 MUTEX_EXIT(lck);        \
  34                                 thread_block();         \
  35                                 if (isGlockOwner) AFS_GLOCK();  \
  36                                 MUTEX_ENTER(lck); \
  37                             }
  38
  39 #define CV_TIMEDWAIT(cv,lck,t)  { \
  40                                 int isGlockOwner = ISAFS_GLOCK(); \
  41                                 if (isGlockOwner) AFS_GUNLOCK();  \
  42                                 assert_wait((vm_offset_t)(cv), 0);      \
  43                                 thread_set_timeout(t);  \
  44                                 MUTEX_EXIT(lck);        \
  45                                 thread_block();         \
  46                                 if (isGlockOwner) AFS_GLOCK();  \
  47                                 MUTEX_ENTER(lck);       \
  48
  49 #define CV_SIGNAL(cv)           thread_wakeup_one((vm_offset_t)(cv))
  50 #define CV_BROADCAST(cv)        thread_wakeup((vm_offset_t)(cv))
  51
  52 typedef struct {
  53     struct simplelock lock;
  54 } afs_kmutex_t;
  55 typedef int afs_kcondvar_t;
  56
  57 #define osi_rxWakeup(cv)        thread_wakeup((vm_offset_t)(cv))
  58
  59 #define LOCK_INIT(a,b) \
  60     do { \
  61         usimple_lock_init(&(a)->lock); \
  62     } while(0);
  63 #define MUTEX_INIT(a,b,c,d) \
  64     do { \
  65         usimple_lock_init(&(a)->lock); \
  66     } while(0);
  67 #define MUTEX_DESTROY(a) \
  68     do { \
  69         usimple_lock_terminate(&(a)->lock); \
  70     } while(0);
  71 #define MUTEX_ENTER(a) \
  72     do { \
  73         usimple_lock(&(a)->lock); \
  74     } while(0);
  75 #define MUTEX_TRYENTER(a) \
  76    usimple_lock(&(a)->lock)
  77 #define MUTEX_EXIT(a) \
  78     do { \
  79         usimple_unlock(&(a)->lock); \
  80     } while(0);
  81
  82 #undef MUTEX_ISMINE
  83 #define MUTEX_ISMINE(a) 1
  84 /*
  85   #define MUTEX_ISMINE(a)
  86   (((afs_kmutex_t *)(a))->owner == current_thread())
  87 */
  88
  89 #undef osirx_AssertMine
  90 extern void osirx_AssertMine(afs_kmutex_t *lockaddr, char *msg);
  91
  92 #endif  /* FBSD40 */
  93
  94
  95 #endif /* _RX_KMUTEX_H_ */
  96