Question

在调用add_location

时似乎遇到了问题

-module(test_sup).
-version(1.0).
-behaviour(supervisor).

-export([start_link/0,add_location/3]).

-export([init/1]).

-define(SERVER, ?MODULE).

start_link() ->
    supervisor:start_link({local,?SERVER}, ?MODULE, no_args).

add_location(SupPid, Spaces, Occupied) ->
    supervisor:start_child(SupPid, child(test_location, [Spaces, Occupied])).

init(no_args) ->
    {ok, {{rest_for_one, 5, 2000}, []}}.

child(Module, Args) ->
    {Module, {Module, start_link, Args},
     permanent, brutal_kill, worker, [Module]}.

我打电话给....

{_, SupPid} = test_sup:start_link().
{Success, LocRef} = test_sup:add_location(SupPid, 1, 0)

但是add_location总是返回错误..

{child,undefined,test_location,
            {test_location,start_link,[1,0]},
            permanent,brutal_kill,worker,
            [zc_pickup_location]}}

任何想法为什么？

Answer 1

我的错误 - test_location中的方法start_link返回了主管不理解的内容。

主管：start_child返回child，undefined

1 个答案: