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nerves_runtime
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0.13.11
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0.10.0
retired
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0.1.0
Small, general runtime utilities for Nerves devices
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lib/nerves_runtime/device/adapter.ex
defmodule Nerves.Runtime.Device.Adapter do
alias Nerves.Runtime.Device
@callback attributes(Device.t) :: map
defmacro __using__(opts) do
quote do
use GenServer
@behaviour Nerves.Runtime.Device.Adapter
@subsystem unquote(opts[:subsystem])
def __subsystem__, do: @subsystem
def attributes(_dev), do: %{}
def start_link(adapter_opts \\ []) do
Nerves.Runtime.Device.Adapter.start_link(__MODULE__, self(), adapter_opts)
end
def stop(pid) do
GenServer.stop(pid)
end
def connect(pid, device) do
GenServer.call(pid, {:connect, device})
end
defoverridable [attributes: 1]
end
end
def start_link(mod, handler, adapter_opts) do
GenServer.start_link(__MODULE__, {mod, handler, adapter_opts})
end
def init({mod, handler, adapter_opts}) do
{:ok, %{
handler: handler,
adapter_state: %{opts: adapter_opts},
mod: mod
}}
end
def handle_call({:connect, device}, _from, s) do
case s.mod.handle_connect(device, s.adapter_state) do
{:ok, adapter_state} ->
put_in(s, [:adapter_state], adapter_state)
{:reply, :ok, s}
{:error, error, s} ->
{:reply, {:error, error}, s}
end
end
def handle_info(data, s) do
s =
case s.mod.handle_info(data, s.adapter_state) do
{:data_in, data, adapter_state} ->
send(s.handler, {:adapter, :data_in, data})
put_in(s, [:adapter_state], adapter_state)
end
{:noreply, s}
end
end