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manager.ex
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manager.ex
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# DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
# Version 2, December 2004
#
# DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
# TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
#
# 0. You just DO WHAT THE FUCK YOU WANT TO.
defmodule Finalizer.Manager do
use Application.Behaviour
use GenServer.Behaviour
def start(_, _) do
if pid = Process.whereis(__MODULE__) do
{ :ok, pid }
else
case :gen_server.start_link(__MODULE__, [id: 0, finalizers: HashDict.new], []) do
{ :ok, pid } = r ->
Process.register(pid, __MODULE__)
r
r -> r
end
end
end
def stop(_) do
Process.exit(Process.whereis(__MODULE__), "application stopped")
end
def handle_call({ :register, fun }, _from, state) do
id = state[:id] + 1
{ :reply, id, [ id: id, finalizers: Dict.put(state[:finalizers], id, fun) ] }
end
def handle_info({ :finalize, id }, state) do
Dict.get!(state[:finalizers], id).()
{ :noreply, [ id: state[:id], finalizers: Dict.delete(state[:finalizers], id) ] }
end
def handle_info({ :finalize, id, data }, state) do
Dict.get!(state[:finalizers], id).(data)
{ :noreply, [ id: state[:id], finalizers: Dict.delete(state[:finalizers], id) ] }
end
end