Let's Go With Ruby

Slides for the talk about Ruby & Golang language interop presented at RubyConf India 2016.

Transcript

1. Let’s Go with Ruby Sumit Das @6ameDev Shishir Joshi @shishir127
2. Golang • C family • Statically typed • Type inference • Explicit type conversion • Automatic memory management, garbage collected • Compiled
3. Ruby and equivalent code in Golang
4. Golang Ruby Interop
5. Golang => C => Ruby
6. First piece of the interop puzzle
7. Golang => C Interop
8. CGo
9. CGo Provides utility functions to convert between Golang and C types. E.g. • Go string to C string func C.CString(goString string) *C.char • C string to Go string func C.GoString(cString *C.char) string • C Arrays to Go slices import "C" import "unsafe" var theCArray *C.YourType = C.getTheArray() length := C.getTheArrayLength() slice := (*[1 << 30]C.YourType)(unsafe.Pointer(theCArray))[:length:length]
10. Compiling shared libraries go build -buildmode=c-shared -o <lib_name>.so <source_file>.go
11. Second piece of interop puzzle
12. C => Ruby Interoperability
13. FFI
14. FFI “Ruby-FFI is a ruby extension for programmatically loading dynamic libraries, binding functions within them, and calling those functions from Ruby code. Moreover, a Ruby-FFI extension works without changes on Ruby and JRuby”.
15. Demo
16. Hello World Go Library
17. Hello World Go Library
18. Importing Go Library in Ruby
19. Using Go Lang’s concurrency from Ruby
23. Goroutines Demo
24. Moving on to Channels
29. Channels Demo
30. Limitations of Golang shared libraries
31. • Cannot export structs to shared libraries, only functions
32. • Cannot export structs to shared libraries, only functions
33. Data types of Golang exported to C
34. Data types of Golang exported to C
35. Ruby callbacks • Not possible to pass Ruby callbacks to Golang code • Will have use an adapter written in C to use Ruby callbacks
36. Questions