Merge pull request #1317 from bettio/fix-avmport

Fix `AVMPort`

Fix AVMPort, and remove warning from HelloWorld.ex.

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

Author: bettio

examples/elixir/HelloWorld.ex

@@ -25,7 +25,7 @@ defmodule HelloWorld do
   def start() do
     Console.print("Hello World\n")
     Console.puts("Console.puts() and Console.print() work with binary ")
-    Console.puts('or charlist strings.\n')
+    Console.puts(~c"or charlist strings.\n")
     Console.flush()
   end
 end

libs/exavmlib/lib/AVMPort.ex

@@ -31,39 +31,12 @@ defmodule AVMPort do
 
   @spec call(pid(), term()) :: term()
   def call(pid, message) do
-    case :erlang.is_process_alive(pid) do
-      false ->
-        {:error, :noproc}
-
-      true ->
-        ref = :erlang.make_ref()
-        send(pid, {self(), ref, message})
-
-        receive do
-          :out_of_memory -> :out_of_memory
-          {^ref, reply} -> reply
-        end
-    end
+    :port.call(pid, message)
   end
 
   @spec call(pid(), term(), non_neg_integer()) :: term()
   def call(pid, message, timeoutMs) do
-    case :erlang.is_process_alive(pid) do
-      false ->
-        {:error, :noproc}
-
-      true ->
-        ref = :erlang.make_ref()
-        send(pid, {self(), ref, message})
-
-        receive do
-          :out_of_memory -> :out_of_memory
-          {^ref, reply} -> reply
-        after
-          timeoutMs ->
-            {:error, :timeout}
-        end
-    end
+    :port.call(pid, message, timeoutMs)
   end
 
   @spec open(term(), list()) :: pid()