From: Bill Kelly <billk@...>
Date: 2009-05-26T07:45:46+09:00
Subject: Re: Ruby Mulithreading


From: "Hello There" <abbb812@gmail.com>
>
> What if i want the code to be able to run on linux aswell?

gets doesn't block other threads on Linux, because select() isn't
broken on Linux.

So... one possibility would be to define a nonblocking gets method,
which on Linux is just aliased to the original gets, since it works.
But on windows, uses the nonblocking implementation.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

if PLATFORM =~ /mswin/
  def getsnb
    # do nonblocking gets using kbhit/getch as in previous email
  end
else
  alias :getsnb :gets
end


# Example...

x = getsnb

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Perhaps a cleaner approach would be to make a module which
provides a replacement for gets on windows only.  On non-windows
systems, the module would be empty.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

module NonblockGets
  if PLATFORM =~ /mswin/
    def gets
      # do nonblocking gets using kbhit/getch as in previous email
    end
  end
end


# Example....

class MyClass
  include NonblockGets

  def my_method
    x = gets  # on windows, this will be the gets defined in NonblockGets module
  end
end

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Hope this helps,

Bill