Function rc_wrlock

mysys/waiting_threads.c:434–443

  DBUG_PRINT("wt", ("LOCK resid=%ld for READ", (ulong)rc->id.value));
}
static void rc_wrlock(WT_RESOURCE *rc)
{
  DBUG_PRINT("wt", ("TRYLOCK resid=%ld for WRITE", (ulong)rc->id.value));
  mysql_mutex_lock(&rc->lock.mutex);
  while (rc->lock.write_locked || rc->lock.readers)
    mysql_cond_wait(&rc->lock.cond, &rc->lock.mutex);
  rc->lock.write_locked= 1;
  mysql_mutex_unlock(&rc->lock.mutex);
  DBUG_PRINT("wt", ("LOCK resid=%ld for WRITE", (ulong)rc->id.value));
}
static void rc_unlock(WT_RESOURCE *rc)
{
  DBUG_PRINT("wt", ("UNLOCK resid=%ld", (ulong)rc->id.value));