Class: Rakie::Event

Inherits:
Object
  • Object
show all
Defined in:
lib/rakie/event.rb

Constant Summary collapse

READ_EVENT = 
1
WRITE_EVENT = 
2
HANDLE_FAILED = 
-1
HANDLE_CONTINUED = 
0
HANDLE_FINISHED = 
1
OPERATION_ADD = 
0
OPERATION_MODIFY = 
1
OPERATION_DELETE = 
2

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Event

Returns a new instance of Event.



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# File 'lib/rakie/event.rb', line 16

def initialize
  @wait_ios = []
  @lock = Mutex.new
  @signal_in, @signal_out = IO.pipe
  @ios = {
    @signal_in => READ_EVENT
  }
  @handlers = {}
  @run_loop = Thread.new do
    self.run_loop
  end
end

Class Method Details

.concurrent ⇒ Integer

Returns:

  • (Integer) 


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# File 'lib/rakie/event.rb', line 196

def self.concurrent
  @concurrent ||= 2
end

.concurrent=(count) ⇒ Object

Parameters:

  • count (Integer) 


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# File 'lib/rakie/event.rb', line 201

def self.concurrent=(count)
  @concurrent = count
end

.delete(io) ⇒ Object 



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# File 'lib/rakie/event.rb', line 181

def self.delete(io)
  i = io.fileno % self.concurrent
  inst = self.instance[i]
  inst.delete(io)
  # self.instance.delete(io)
end

.instance ⇒ Object 



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# File 'lib/rakie/event.rb', line 170

def self.instance
  @instance ||= Array.new(self.concurrent) { |i| Event.new }
end

.modify(io, listener, type) ⇒ Object 



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# File 'lib/rakie/event.rb', line 188

def self.modify(io, listener, type)
  i = io.fileno % self.concurrent
  inst = self.instance[i]
  inst.modify(io, listener, type)
  # self.instance.modify(io, listener, type)
end

.push(io, listener, type) ⇒ Object 



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# File 'lib/rakie/event.rb', line 174

def self.push(io, listener, type)
  i = io.fileno % self.concurrent
  inst = self.instance[i]
  inst.push(io, listener, type)
  # instance.push(io, listener, type)
end

Instance Method Details

#delete(io) ⇒ Object 



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# File 'lib/rakie/event.rb', line 156

def delete(io)
  @lock.lock
  @wait_ios.push([OPERATION_DELETE, io, nil, nil])
  @signal_out.write('a')
  @lock.unlock
end

#modify(io, handler, event) ⇒ Object 



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# File 'lib/rakie/event.rb', line 163

def modify(io, handler, event)
  @lock.lock
  @wait_ios.push([OPERATION_MODIFY, io, handler, event])
  @signal_out.write('a')
  @lock.unlock
end

#process_signal(io) ⇒ Object 



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# File 'lib/rakie/event.rb', line 29

def process_signal(io)
  signal = io.read(1)

  if signal == 'q'
    return 1
  end

  operation, new_io, new_handler, new_event = @wait_ios.shift
  if new_io.closed?
    return 0
  end

  Log.debug("Event handling #{signal} with #{new_io.fileno} to #{new_event}")

  if operation == OPERATION_ADD
    @ios[new_io] = new_event
    @handlers[new_io] = new_handler
    Log.debug("Event add all #{new_io.fileno} to #{new_event}")

  elsif operation == OPERATION_DELETE
    handler = @handlers[new_io]

    if handler != nil
      Log.debug("Event close #{new_io}")
      handler.on_detach(new_io)
    end

    @ios.delete(new_io)
    @handlers.delete(new_io)
    Log.debug("Event remove all #{new_io}")

  elsif operation == OPERATION_MODIFY
    @ios[new_io] = new_event
    @handlers[new_io] = new_handler
    Log.debug("Event modify all #{new_io.fileno} to #{new_event}")
  end

  return 0
end

#push(io, handler, event) ⇒ Object 



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# File 'lib/rakie/event.rb', line 149

def push(io, handler, event)
  @lock.lock
  @wait_ios.push([OPERATION_ADD, io, handler, event])
  @signal_out.write('a')
  @lock.unlock
end

#run_loop ⇒ Object 



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# File 'lib/rakie/event.rb', line 69

def run_loop
  loop do
    # p @ios
    # begin
    #   read_ios = @ios.select {|k, v| v & READ_EVENT > 0}
    #   write_ios = @ios.select {|k, v| v & WRITE_EVENT > 0}
    # rescue Exception => e
    #   p @ios
    # end

    read_ios = @ios.select {|k, v| v & READ_EVENT > 0}
    write_ios = @ios.select {|k, v| v & WRITE_EVENT > 0}

    # Log.debug("Event selecting ...")
    read_ready, write_ready = IO.select(read_ios.keys, write_ios.keys, [], 5)

    if read_ready != nil
      read_ready.each do |io|
        if io == @signal_in
          @lock.lock

          if self.process_signal(io) != 0
            @lock.unlock
            return
          end

          @lock.unlock
          next
        end

        handler = @handlers[io]

        if handler == nil
          next
        end

        result = handler.on_read(io)

        if result == HANDLE_FINISHED
          @ios[io] &= ~READ_EVENT
          Log.debug("Event remove read #{io}")

        elsif result == HANDLE_FAILED
          handler.on_detach(io)
          Log.debug("Event close #{io}")

          @ios.delete(io)
          @handlers.delete(io)
          Log.debug("Event remove all #{io}")
        end
      end
    end

    if write_ready != nil
      write_ready.each do |io|
        handler = @handlers[io]

        if handler == nil
          next
        end

        result = handler.on_write(io)

        if result == HANDLE_FINISHED
          @ios[io] &= ~WRITE_EVENT
          Log.debug("Event remove write #{io}")

        elsif result == HANDLE_FAILED
          handler.on_detach(io)
          Log.debug("Event close #{io}")

          @ios.delete(io)
          @handlers.delete(io)
          Log.debug("Event remove all #{io}")
        end
      end
    end
  end
end