djberg96

require 'ffi'

class Foo
  extend FFI::Library
  ffi_lib('c')

  attach_function :sysctlbyname,
    [:string, :pointer, :pointer, :pointer, :size_t],
    :int

djberg96

class FFI::Pointer
  # This works fine on MRI, but dies on JRuby
  def read_array_of_string
    elements = []

    psz = RUBY_PLATFORM == 'java' ? 4 : self.class.size
    loc = self

    until ((element = loc.read_pointer).null?)
      elements << element.read_string

djberg96

# 10,000 iterations of URI.build

Thread ID: 2148426160
Total: 3.451971

 %self     total     self     wait    child    calls  name
 13.51      1.96     0.47     0.00     1.49    10000  URI::Generic#initialize (/usr/local/lib/ruby/1.8/uri/generic.rb:161}
 12.44      0.56     0.43     0.00     0.13    10000  Array#collect (ruby_runtime:0}
  4.91      0.58     0.17     0.00     0.41    10000  <Module::URI::Util>#make_components_hash (/usr/local/lib/ruby/1.8/uri/common.rb:218}
  3.97      2.77     0.14     0.00     2.64    10000  <Class::URI::Generic>#build (/usr/local/lib/ruby/1.8/uri/generic.rb:108}

djberg96

class Foo
  class << self
    def bar; end

    # Result is 'NOPE' - why?
    if respond_to?(:bar)
      puts "YEP"
    else
      puts "NOPE"
    end

djberg96

require 'ffi'

class Filesystem
  extend FFI::Library
  ffi_lib FFI::Library::LIBC

  attach_function(:getmntinfo, [:pointer, :int], :int)
  attach_function(:strerror, [:int], :string)

  class Statfs < FFI::Struct

djberg96

class Foo
  Alpha = 1
  Beta  = 2
  Gamma = 4

  @@opts = {
    Alpha => 'alpha',
    Beta  => 'beta',
    Gamma => 'gamma'
  }

djberg96

require 'ffi'

class Filesystem
  extend FFI::Library
  ffi_lib FFI::Library::LIBC

  attach_function(:strerror, [:int], :string)
  attach_function(:getmntinfo64, [:pointer, :int], :int)

  class Statfs < FFI::Struct

djberg96

require 'ffi'

module Sys
  class Filesystem
    extend FFI::Library
    ffi_lib FFI::Library::LIBC

    if RbConfig::CONFIG['host_os'] =~ /darwin|osx|mach/i
      attach_function(:getmntinfo, :getmntinfo64, [:pointer, :int], :int)
    else

djberg96

class Foo
  def mktemp(template)
    regex = /^([^X].*?)(X)(XXXXX)/

    unless m = regex.match(template)
      raise "Invalid template: #{template}"
    end

    chars  = ('a'..'z').to_a

djberg96

# Works fine with MRI and JRuby.

# Rubinius doesn't seem to pick up the gem, blows up with an error.
require 'rubygems'
gem 'test-unit'
require 'test/unit'

class TC_Foo < Test::Unit::TestCase
  test "test-unit 2 works as expected" do
    assert_true(1 == 1)