Class expr_user_lock

handlersocket/database.cpp:105–128

};

struct expr_user_lock : private noncopyable {
  expr_user_lock(THD *thd, int timeout)
    : lck_key("handlersocket_wr", 16, &my_charset_latin1),
      lck_timeout(timeout),
      lck_func_get_lock(&lck_key, &lck_timeout),
      lck_func_release_lock(&lck_key)
  {
    lck_key.fix_fields(thd, 0);
    lck_timeout.fix_fields(thd, 0);
    lck_func_get_lock.fix_fields(thd, 0);
    lck_func_release_lock.fix_fields(thd, 0);
  }
  long long get_lock() {
    return lck_func_get_lock.val_int();
  }
  long long release_lock() {
    return lck_func_release_lock.val_int();
  }
 private:
  Item_string lck_key;
  Item_int lck_timeout;
  Item_func_get_lock lck_func_get_lock;
  Item_func_release_lock lck_func_release_lock;
};

struct dbcontext : public dbcontext_i, private noncopyable {
  dbcontext(volatile database *d, bool for_write);