53  */
  54 typedef struct rrwlock {
  55         kmutex_t        rr_lock;
  56         kcondvar_t      rr_cv;
  57         kthread_t       *rr_writer;
  58         refcount_t      rr_anon_rcount;
  59         refcount_t      rr_linked_rcount;
  60         boolean_t       rr_writer_wanted;
  61         boolean_t       rr_track_all;
  62 } rrwlock_t;
  63 
  64 /*
  65  * 'tag' is used in reference counting tracking.  The
  66  * 'tag' must be the same in a rrw_enter() as in its
  67  * corresponding rrw_exit().
  68  */
  69 void rrw_init(rrwlock_t *rrl, boolean_t track_all);
  70 void rrw_destroy(rrwlock_t *rrl);
  71 void rrw_enter(rrwlock_t *rrl, krw_t rw, void *tag);
  72 void rrw_enter_read(rrwlock_t *rrl, void *tag);

  73 void rrw_enter_write(rrwlock_t *rrl);
  74 void rrw_exit(rrwlock_t *rrl, void *tag);
  75 boolean_t rrw_held(rrwlock_t *rrl, krw_t rw);
  76 void rrw_tsd_destroy(void *arg);
  77 
  78 #define RRW_READ_HELD(x)        rrw_held(x, RW_READER)
  79 #define RRW_WRITE_HELD(x)       rrw_held(x, RW_WRITER)
  80 #define RRW_LOCK_HELD(x) \
  81         (rrw_held(x, RW_WRITER) || rrw_held(x, RW_READER))
  82 
  83 /*
  84  * A reader-mostly lock implementation, tuning above reader-writer locks
  85  * for hightly parallel read acquisitions, pessimizing write acquisitions.
  86  *
  87  * This should be a prime number.  See comment in rrwlock.c near
  88  * RRM_TD_LOCK() for details.
  89  */
  90 #define RRM_NUM_LOCKS           17
  91 typedef struct rrmlock {
  92         rrwlock_t       locks[RRM_NUM_LOCKS];

  53  */
  54 typedef struct rrwlock {
  55         kmutex_t        rr_lock;
  56         kcondvar_t      rr_cv;
  57         kthread_t       *rr_writer;
  58         refcount_t      rr_anon_rcount;
  59         refcount_t      rr_linked_rcount;
  60         boolean_t       rr_writer_wanted;
  61         boolean_t       rr_track_all;
  62 } rrwlock_t;
  63 
  64 /*
  65  * 'tag' is used in reference counting tracking.  The
  66  * 'tag' must be the same in a rrw_enter() as in its
  67  * corresponding rrw_exit().
  68  */
  69 void rrw_init(rrwlock_t *rrl, boolean_t track_all);
  70 void rrw_destroy(rrwlock_t *rrl);
  71 void rrw_enter(rrwlock_t *rrl, krw_t rw, void *tag);
  72 void rrw_enter_read(rrwlock_t *rrl, void *tag);
  73 void rrw_enter_read_prio(rrwlock_t *rrl, void *tag);
  74 void rrw_enter_write(rrwlock_t *rrl);
  75 void rrw_exit(rrwlock_t *rrl, void *tag);
  76 boolean_t rrw_held(rrwlock_t *rrl, krw_t rw);
  77 void rrw_tsd_destroy(void *arg);
  78 
  79 #define RRW_READ_HELD(x)        rrw_held(x, RW_READER)
  80 #define RRW_WRITE_HELD(x)       rrw_held(x, RW_WRITER)
  81 #define RRW_LOCK_HELD(x) \
  82         (rrw_held(x, RW_WRITER) || rrw_held(x, RW_READER))
  83 
  84 /*
  85  * A reader-mostly lock implementation, tuning above reader-writer locks
  86  * for hightly parallel read acquisitions, pessimizing write acquisitions.
  87  *
  88  * This should be a prime number.  See comment in rrwlock.c near
  89  * RRM_TD_LOCK() for details.
  90  */
  91 #define RRM_NUM_LOCKS           17
  92 typedef struct rrmlock {
  93         rrwlock_t       locks[RRM_NUM_LOCKS];