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RubyMotion: Under the Hood
The document introduces RubyMotion, a tool that allows developers to build native iOS and OS X applications using Ruby, emphasizing its ability to interface with Objective-C libraries and its CLI-based build system. It contrasts RubyMotion with MacRuby, detailing their compilation processes and memory management techniques. Additionally, it provides insights into debugging strategies and highlights the importance of static compilation for iOS development.
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RubyMotion: Under the Hood
- 1. RubyMotion: Under the Hood Inspiredby Click and Clack Monday, October 14, 2013
- 2. A brief introduction Monday,October 14, 2013
- 3. About Me Name: JoshuaBallanco Monday, October 14, 2013
- 4. About Me Employer: BurnsideDigital Monday, October 14, 2013
- 5. About Me Location: Ankara,Turkey Monday, October 14, 2013
- 6. A slightly longer introduction Monday,October 14, 2013
- 7.
- 8. About Me Employer: Patch Monday,October 14, 2013
- 9. About Me Location: NewYork City Monday, October 14, 2013
- 10. Before that... Monday, October14, 2013
- 11. About Me Employer: Apple Monday,October 14, 2013
- 12. About Me Location: Cupertino Monday,October 14, 2013
- 13. Before that... Monday, October14, 2013
- 14. About Me School: Universityof Miami Monday, October 14, 2013
- 15. About Me Location: Miami Monday,October 14, 2013
- 16. A bit ofhistory Monday, October 14, 2013
- 17. In graduate school Monday,October 14, 2013
- 18. In graduate school Monday,October 14, 2013
- 19. At Apple... Retail Monday,October 14, 2013
- 20. At Apple Laurent Sansonetti Monday,October 14, 2013
- 21. After Apple... Monday, October14, 2013
- 22. Episode VI -The Return of The RubyMotion Monday, October 14, 2013
- 23. What is RubyMotion? •Use Ruby to build apps for iOS and OS X • Native apps • Interface directly with Obj-C libraries • CLI-based build system Monday, October 14, 2013
- 24. What is RubyMotion? •RubyMotion: http://www.rubymotion.com/ • MotionCasts: http://motioncasts.tv/ • RubyMotion Wrappers: ! http://rubymotion-wrappers.com/ • ...and lot’s more Monday, October 14, 2013
- 25. What is MacRuby? •Intended to be the implementation of Ruby 2.0 for OS X • Target RubySpec compliance • JIT or AOT Compiled • Uses libauto for Garbage Collection Monday, October 14, 2013
- 26. What is MacRuby? RubySyntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 27. Running a “something.rb”file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 28. Running a “something.rb”file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 29. Running a “something.rb”file Ruby Syntax Parser Compiler VM (sans GVL) LLVM (with JIT) Objective-C Runtime Monday, October 14, 2013
- 30. AOT compiling “something.rb” RubySyntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 31. AOT compiling “something.rb” RubySyntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 32. Running an AOTcompiled “something.rb” Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 33. Running an AOTcompiled “something.rb” Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 34. Running an AOTcompiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 35. Running an AOTcompiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 36. Running an AOTcompiled “something.rb” Parser Compiler LLVM VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 37. What is RubyMotion? •Descendent of MacRuby • “Ruby, the Good Parts” • Static Compiled • Retain/release reference counting Monday, October 14, 2013
- 38. Static compiling “something.rb” RubySyntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 39. Static compiling “something.rb” RubySyntax Parser Compiler VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 LLVM something.o
- 40. Running a staticcompiled “something.rb” VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 41. Running a staticcompiled “something.rb” VM (sans GVL) Objective-C Runtime Monday, October 14, 2013 something.o
- 42. Why must westatically compile? • On OS X • Compile writes code to a memory page • Runtime runs the code from that memory page Monday, October 14, 2013
- 43. Why must westatically compile? • On iOS Memory pages must be writable or executable, NOT BOTH! • • • Monday, October 14, 2013 • OS prohibits runtime compilation Apple prohibits interpreting arbitrary scripts ...but you wouldn’t want an interpreter anyway
- 44.
- 45. What happened tothe Garbage Collector? It required extra threads, so we had to kill it... Monday, October 14, 2013
- 46. So RubyMotion Uses ARC? Yes... Uh...no ...sorta? Monday,October 14, 2013
- 47. ARC vs “ARC” •Objective-C’s ARC modifies your code before compilation • RubyMotion VM knows when retain and/or release should be called...your code is not touched Monday, October 14, 2013
- 48. ARC vs “ARC” Isn’tthe distinction rather academic? Probably... Monday, October 14, 2013
- 49. “ARC” Caveats • Collectionhappens when the autorelease pool drains • Need to be careful with tight loops that generate many objects • Use “autorelease do...end” • Detects almost all cycles • Use WeakRefs if cycles become problematic Monday, October 14, 2013
- 50. Debugging RubyMotion • Remember,RubyMotion objects are Objective-C objects... • All the usual tricks are valid! Monday, October 14, 2013
- 51. Let’s Play! Monday, October14, 2013
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- 54. REPL Magic Monday, October14, 2013
- 55. REPL Magic Monday, October14, 2013
- 56. REPL Magic Monday, October14, 2013
- 57. REPL Magic Monday, October14, 2013
- 58. That’s cool...but can youdo it in a debugger??? Monday, October 14, 2013
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- 63. That’s CRAZY! I know...butit’s fun! Monday, October 14, 2013
- 64. Debugging RubyMotion • Helpermethods “pro” and “pri” • http://www.rubymotion.com/developercenter/articles/debugging/ • Watch for more/better tooling to come... Monday, October 14, 2013
- 65.