| % Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| % use this file except in compliance with the License. You may obtain a copy of |
| % the License at |
| % |
| % http://www.apache.org/licenses/LICENSE-2.0 |
| % |
| % Unless required by applicable law or agreed to in writing, software |
| % distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| % WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| % License for the specific language governing permissions and limitations under |
| % the License. |
| |
| -module(couch_drv). |
| -behaviour(gen_server). |
| -vsn(1). |
| -export([ |
| init/1, |
| handle_call/3, |
| handle_cast/2, |
| handle_info/2, |
| terminate/2, |
| code_change/3 |
| ]). |
| |
| -export([start_link/0]). |
| |
| -include_lib("couch/include/couch_db.hrl"). |
| -include_lib("kernel/include/logger.hrl"). |
| |
| start_link() -> |
| gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). |
| |
| init([]) -> |
| LibDir = util_driver_dir(), |
| case erl_ddll:load(LibDir, "couch_icu_driver") of |
| ok -> |
| {ok, nil}; |
| {error, already_loaded} -> |
| ?LOG_INFO(#{what => reload_couch_icu_driver}), |
| couch_log:info("~p reloading couch_icu_driver", [?MODULE]), |
| ok = erl_ddll:reload(LibDir, "couch_icu_driver"), |
| {ok, nil}; |
| {error, Error} -> |
| {stop, erl_ddll:format_error(Error)} |
| end. |
| |
| handle_call(_Request, _From, State) -> |
| {reply, ok, State}. |
| |
| handle_cast(_Request, State) -> |
| {noreply, State}. |
| |
| handle_info(_Info, State) -> |
| {noreply, State}. |
| |
| terminate(_Reason, _State) -> |
| ok. |
| |
| code_change(_OldVsn, State, _Extra) -> |
| {ok, State}. |
| |
| % private API |
| util_driver_dir() -> |
| case config:get("couchdb", "util_driver_dir", undefined) of |
| undefined -> |
| couch_util:priv_dir(); |
| LibDir0 -> |
| LibDir0 |
| end. |