Class: FIPC

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

Overview

File Format:

next_data_ptr:64it

| [data_len:64bit] | [data_len:64bit]

00000000

Class Method Summary collapse

Class Method Details

.pop(channel) ⇒ Object 



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# File 'lib/LibFIPC.rb', line 55

def self.pop(channel)

  fileName = channel+".dat"

  if File::exists?(fileName)

    file = File.new( fileName, "rb+")
    file.flock(File::LOCK_EX)
    ptrStr = file.read(8)

    ptr = ptrStr.unpack("Q!")[0]
    file.seek(ptr)

    dataLenStr = file.read(8)
    dataLen = dataLenStr.unpack("Q!")[0]

    data = file.read(dataLen)


    ptr = file.pos

    file.seek(0)

    file << [ptr].pack("Q!")


    if ptr == file.size
      file.close
      self.reset(channel)

    else
      file.close
    end

    return data



   else

     return false
   end

end

.push(channel, msg) ⇒ Object 



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# File 'lib/LibFIPC.rb', line 25

def self.push(channel,msg)

  fileName = channel+".dat"

  if File::exists?(fileName)

    file = File.new( fileName, "ab+")
    file.flock(File::LOCK_EX)
    file << [msg.length].pack("Q!")
    file << msg
    file.close()

   else

    file = File.new( fileName, "wb+")
    file.flock(File::LOCK_EX)
    ptr=8
    file << [ptr].pack("Q!")
    file << [msg.length].pack("Q!")
    file << msg
    file.close()


  end  

  return true


end

.receiveMsg(channel) ⇒ Object 



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# File 'lib/LibFIPC.rb', line 19

def self.receiveMsg(channel)

  self.pop(channel)

end

.reset(channel) ⇒ Object 



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# File 'lib/LibFIPC.rb', line 100

def self.reset(channel)

  fileName = channel+".dat"


  if File::exists?(fileName) and  File.writable?(fileName)  

    File.delete(fileName)
    return true

  else

    return false

  end
end

.sendMsg(channel, msg) ⇒ Object 



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# File 'lib/LibFIPC.rb', line 13

def self.sendMsg(channel,msg)

  self.push(channel,msg)

end