inter process communication using ffi-efl and ecore_pipe

gistfile1.rb

#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
#
require 'efl/native/ecore'
require 'efl/native/elm/elm_win'
require 'efl/native/elm/elm_bg'
require 'efl/native/elm/elm_label'
require 'efl/native/elm/elm_object'

include Efl::Native

elm_init 0, FFI::MemoryPointer::NULL

win_del = Proc.new { |data,evas_object,event_info|
    elm_exit();
}

win = elm_win_add nil, "App name", :elm_win_basic
elm_win_title_set win, "Window title"
evas_object_smart_callback_add win, "delete,request", win_del, nil

bg = elm_bg_add win
evas_object_size_hint_weight_set bg, 1.0, 1.0
elm_win_resize_object_add win, bg
evas_object_show bg

lb = elm_label_add win
elm_object_part_text_set lb, nil, "Hello World"
evas_object_size_hint_weight_set lb, 1.0, 1.0
elm_win_resize_object_add win, lb
evas_object_show lb

evas_object_move win, 300, 300
evas_object_resize win, 200, 100

evas_object_show win

pipe_cb = Proc.new { |date,buffer,n|
    elm_object_part_text_set lb, nil, buffer.read_string[0..n-1]
}

pipe = ecore_pipe_add pipe_cb, nil

pid = fork {
    ecore_pipe_read_close(pipe);
    [ "hello","dying","old","planet","earth"].each do |w|
        sleep 1
        ecore_pipe_write pipe, w, w.length
    end
}

elm_run
ecore_pipe_del pipe
elm_shutdown