diff options
Diffstat (limited to 'src/include/mutex.h')
| -rw-r--r-- | src/include/mutex.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/include/mutex.h b/src/include/mutex.h index 5f814c2799e..7aeb6160f43 100644 --- a/src/include/mutex.h +++ b/src/include/mutex.h @@ -50,11 +50,35 @@ struct __wt_rwlock { /* Read/write lock */ } s; } u; + int16_t stat_read_count_off; /* read acquisitions offset */ + int16_t stat_write_count_off; /* write acquisitions offset */ + int16_t stat_app_usecs_off; /* waiting application threads offset */ + int16_t stat_int_usecs_off; /* waiting server threads offset */ + WT_CONDVAR *cond_readers; /* Blocking readers */ WT_CONDVAR *cond_writers; /* Blocking writers */ }; /* + * WT_RWLOCK_INIT_TRACKED -- + * Read write lock initialization, with tracking. + * + * Implemented as a macro so we can pass in a statistics field and convert + * it into a statistics structure array offset. + */ +#define WT_RWLOCK_INIT_TRACKED(session, l, name) do { \ + WT_RET(__wt_rwlock_init(session, l)); \ + (l)->stat_read_count_off = (int16_t)WT_STATS_FIELD_TO_OFFSET( \ + S2C(session)->stats, lock_##name##_read_count); \ + (l)->stat_write_count_off = (int16_t)WT_STATS_FIELD_TO_OFFSET( \ + S2C(session)->stats, lock_##name##_write_count); \ + (l)->stat_app_usecs_off = (int16_t)WT_STATS_FIELD_TO_OFFSET( \ + S2C(session)->stats, lock_##name##_wait_application); \ + (l)->stat_int_usecs_off = (int16_t)WT_STATS_FIELD_TO_OFFSET( \ + S2C(session)->stats, lock_##name##_wait_internal); \ +} while (0) + +/* * Spin locks: * * WiredTiger uses spinlocks for fast mutual exclusion (where operations done |