Function kill_threads_callback

sql/sql_parse.cc:9240–9268

static my_bool kill_threads_callback(THD *thd, kill_threads_callback_arg *arg)
{
  if (thd->security_ctx->user)
  {
    /*
      Check that hostname (if given) and user name matches.

      host.str[0] == '%' means that host name was not given. See sql_yacc.yy
    */
    if (((arg->user->host.str[0] == '%' && !arg->user->host.str[1]) ||
         !strcmp(thd->security_ctx->host_or_ip, arg->user->host.str)) &&
        !strcmp(thd->security_ctx->user, arg->user->user.str))
    {
      if (!(arg->thd->security_ctx->master_access &
            PRIV_KILL_OTHER_USER_PROCESS) &&
          !arg->thd->security_ctx->user_matches(thd->security_ctx))
      {
        return MY_TEST(arg->thd->security_ctx->master_access & PROCESS_ACL);
      }
      arg->counter++;
      mysql_mutex_lock(&thd->LOCK_thd_kill); // Lock from delete
      mysql_mutex_lock(&thd->LOCK_thd_data);
      thd->awake_no_mutex(arg->kill_signal);
      mysql_mutex_unlock(&thd->LOCK_thd_data);
      mysql_mutex_unlock(&thd->LOCK_thd_kill);
    }
  }
  return 0;
}


static uint kill_threads_for_user(THD *thd, LEX_USER *user,