%% Copyright (c) 2015-2018, Loïc Hoguin <[email protected]>
%%
%% Permission to use, copy, modify, and/or distribute this software for any
%% purpose with or without fee is hereby granted, provided that the above
%% copyright notice and this permission notice appear in all copies.
%%
%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-module(esdl2_callbacks).
-behaviour(gen_server).
%% API.
-export([start_link/0]).
%% gen_server.
-export([init/1]).
-export([handle_call/3]).
-export([handle_cast/2]).
-export([handle_info/2]).
-export([terminate/2]).
-export([code_change/3]).
-record(state, {
}).
%% API.
-spec start_link() -> {ok, pid()}.
start_link() ->
gen_server:start_link(?MODULE, [], []).
%% gen_server.
init([]) ->
ok = esdl2:register_callback_process(),
{ok, #state{}}.
handle_call(_Request, _From, State) ->
{reply, ignored, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info({callback, M, F, A}, State) ->
try
apply(M, F, A)
catch Class:Reason ->
error_logger:error_msg("Exception ~p:~p with callback:~n{~p,~p,~p}~n",
[Class, Reason, M, F, A])
end,
{noreply, State};
handle_info({callback, M, F, A, ResF, ResA}, State) ->
try apply(M, F, A) of
Res ->
apply(esdl2, ResF, ResA ++ [Res])
catch Class:Reason ->
%% We need to inform the NIF that an error occurred.
apply(esdl2, ResF, ResA ++ [error]),
error_logger:error_msg("Exception ~p:~p with callback:~n{~p,~p,~p}~n",
[Class, Reason, M, F, A])
end,
{noreply, State};
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
