MacRuby, an introduction

MacRuby, an introduction

• 1.
  A quick introductionto MacRuby Objective-C, Cocoa, LLVM, Grand Central and other musings Olivier Gutknecht - OSDC.fr - Oct. 3 2009
• 2.
  Olivier Gutknecht olg@no-distance.net twitter :olg MacRuby iCal, iSync, [...] co-founder Active lurker Server Software
• 3.
  Breaking News ! MacRubydeveloper attacked by raptors
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  Text Text
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  MacRuby
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  Mac OS XStack Applications Application Frameworks Cocoa, WebKit, ... Core Technologies CoreGraphics, CoreFoundation, ... Darwin Kernel, userland, libdispatch, ...
• 8.
  Ruby on OSX 2002 Mac OS X 10.2 Ruby 1.6.7 2005 Mac OS X 10.4 Ruby 1.8.2 2007 Mac OS X 10.5 Ruby 1.8.6 RubyCocoa, gems, Rails 2009 Mac OS X 10.6 Ruby 1.8.7 RubyCocoa, gems, Rails 20xx ? Sky is the limit
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  Ruby on OSX • Ruby, just on another unix platform • With some small improvements... e.g. mongrel_rails_persists on OS X Server launchd / bonjour integration • What about Cocoa ?
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  Family business SmallTalk Objective-C Ruby
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  A “true” OSX App in Ruby ? Sure. Check out Gitnub
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  RubyCocoa • A ruby-objcbridge (FUJIMOTO Hisakuni, 2001) • Ruby 1.8 • Green threads, no reentrance • Two runtimes, two GC • ... interesting syntax • Ouch
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  require 'osx/cocoa'; includeOSX app = NSApplication.sharedApplication win = NSWindow.alloc.initWithContentRect_styleMask_backing_defer( [0, 0, 200, 60], NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask, NSBackingStoreBuffered, false) win.title = 'Hello World' button = NSButton.alloc.initWithFrame(NSZeroRect) win.contentView.addSubview(button) button.bezelStyle = NSRoundedBezelStyle button.title = 'Hello!' button.sizeToFit button.frameOrigin = NSMakePoint((win.contentView.frameSize.width/ 2.0)-(button.frameSize.width/2.0), (win.contentView.frameSize.height/ 2.0)-(button.frameSize.height/2.0)) button_controller = Object.new def button_controller.sayHello(sender) puts "Hello OSDC!" end button.target = button_controller button.action = 'sayHello:' win.display win.orderFrontRegardless app.run
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  Easy. (when you’re proficientin Objective-C, Cocoa, Ruby and the bridge - here be dragons)
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  MacRuby
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  MacRuby • One GCto release them all
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  MacRuby • One GCto release them all • One runtime to bind them
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  MacRuby • One GCto release them all • One runtime to bind them • In the land of Cocoa where Obj-C lie
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  MacRuby Laurent Sansonetti (Apple) Vincent Isambart Kich Kilmer Eloy Duran Ben Stiglitz Matt Aimonetti ... http://www.macruby.org http://twitter.com/macruby
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  Modest goals • Thebest platform for Ruby developers • A great platform for Cocoa developers
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  Bridge, what bridge? $ macirb >> s = "osdc" => "osdc" >> s.class => NSMutableString >> s.class.ancestors => [NSMutableString, NSString, Comparable, NSObject, Kernel] >> s.upcase => "OSDC" >> s.uppercaseString => "OSDC" >> s.respondsToSelector(:upcase) => 1 >> s.respond_to?(:upcase) => true
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  Bridge, what bridge? • A Ruby class is an Objective-C class • A Ruby method is an Objective-C method • A Ruby instance is an Objective-C instance
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  Syntax Objective-C Person *person = [Person new]; [person name]; [person setName:name]; [person setFirstName:first lastName:last]; MacRuby person = Person.new person.name person.name = myName person.setFirstName(first, lastName:last)
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  HotCocoa require ‘hotcocoa’ include HotCocoa applicationdo win = window :title => ‘hello OSDC’, :frame => [0, 0, 200, 60] b = button :title => ‘Hello!’, :layout => {:align => :center} win << b b.on_action { puts “Hello OSDC!” } end A thin layer by Rich Kilmer, providing a natural ruby experience when coding Cocoa apps
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  Ruby 1.9 Parser Runtime Built-in classes YARV GC Stdlib
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  MacRuby Runtime Parser Stdlib LLVM/Roxor libobjc Built-in Classes AOT JIT libauto CoreFoundation
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  MacRuby 0.4 -04/09 • XCode integration • Embedding / Runtime Control • HotCocoa • Threaded GC
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  MacRuby 0.5 -xx/09 • YARV ? LLVM ! • RubySpec • AOT • GrandCentral • ...
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  Why LLVM ?
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  Coolest Logo Ever
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  Everybody loves microbenchmarks (lies,damn lies and benchmarks) From a bench by Patrick Thomson @ C4
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  C static int fib(intn) { if (n < 3) { return 1; } else { return fib(n - 1) + fib(n - 2); } }
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  Objective-C @implementation Fib - (int)fib:(int)n { if (n < 3) { return 1; } else { return [self fib:n - 1] + [self fib:n - 2]; } } @end
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  4 3 execution time (s) 2 1 0 fib(40) C Objective-C
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  Ruby def fib(n) if n < 3 1 else fib(n-1) + fib(n-2) end end p fib(ARGV.join("").to_i)
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  4 3 execution time (s) 2 1 0 fib(40) C MacRuby Objective-C
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  MRI Ruby 1.8 $ruby fibo.rb 40 102334155 MacRuby $ macruby fibo.rb 40 102334155 MacRuby AOT $ macrubyc fibo.rb -o fibo $ ./fibo 40 102334155
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  Grand Central # AGCD-based implementation of the sleeping barber problem: # http://en.wikipedia.org/wiki/Sleeping_barber_problem # http://www.madebysofa.com/#blog/the_sleeping_barber waiting_chairs = Dispatch::Queue.new('com.apple.waiting_chairs') semaphore = Dispatch::Semaphore.new(3) index = -1 while true index += 1 success = semaphore.wait(Dispatch::TIME_NOW) if success != 0 puts "Customer turned away #{index}" next end waiting_chairs.dispatch do semaphore.signal puts "Shave and a haircut #{index}" end end
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  Tools Galore ?
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  Why MacRuby ? •Ruby for “mac-like” desktop applications • A wonderful experimentation playground • ... Interesting perspectives
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  Q&A • Ruby 1.9compatibility • Right now, ≈ 80% on rubyspec • Other platforms, portability • No closed-source dependancies, no definitive technical blocker • ... Any takers ?
• 43.
  Thanks!