Table of Contents Go Overview Go Compiler Implementation Go Library Lua Overview Coroutines Reference Manual The Language Lua Internals Code organization Swift Overview

• https://golang.org/
• https://github.com/golang
• Rob Pike: http://herpolhode.com/rob/
  • Rob on WHYs of design decisions
  • NewSqueak: precursor to Go https://swtch.com/~rsc/thread/newsqueak.pdf
  • NewSqueak talk: https://www.youtube.com/watch?v=hB05UFqOtFA&list=WL&index=43
  • Lectures on Concurrency: #1 #3 #5

• Go interfaces
  • Russ Cox' impl note: http://research.swtch.com/interfaces
• Goroutines
  • Goroutine vs coroutine
• CGO
  • cgocall.go: Go-to-C call impl
• Channels
  • IPC mechanism based on CSP channels
  • Processes communicate/synchronize through channels (not directly writing to them)
    • this allows to encapsulate all sync/comm inside channel implementation?
  • Behavior is similar to SV mailbox only with blocking try/put
• Go runtime
  • Go assembly
  • Go runtime symbols
  • Go scheduler
    • Scalable go scheduler doc
    • runtime/proc.go: current scheduler impl
    • original scheduler impl
    • work stealing scheduler
    • Morsing's blog: https://morsmachine.dk/go-scheduler

• Go RPC

• lua.org: http://www.lua.org
  • documentation: http://www.lua.org/docs.html
  • Lua workshops: http://www.lua.org/community.html
• Lua packages:
  • LuaSockets: http://w3.impa.br/~diego/software/luasocket/reference.html
• LuaJIT (faster impl): http://luajit.org
  • LuaJIT 2.0 bytecode instruction set: http://wiki.luajit.org/Bytecode-2.0
  • LuaJIT + RPI: http://cellux.github.io/articles/introduction-to-luajit-part-1/
• elua (embedded Lua): http://www.eluaproject.net

• Lua coroutine vs stackless Python's microthread

• Lua is a dynamicall typed langauge -- variables do not have types, values have types
• All Lua values are first-class values.
• There are 8 basic types:
  • nil
  • boolean
  • number
  • string
  • function
  • userdata
  • thread
  • table

• lua.h: portal to entire LUA "API" (lua_*)
  • macros for value type tags, subtags for numbers, etc.
  • state manipulation: lua_newstate, lua_close, lua_newthread
  • stack manipulation: lua_gettop, lua_settop, lua_pushvalue, ...
  • stack read functions (read stack value in C): lua_type(lua_State *L, int stkidx), lua_tonumberx, lua_toboolean, ...
  • push functions (push C value to stack): lua_pushnumber, lua_pushstring, ...
  • get functions (Lua -> stack): lua_getglobal, lua_gettable, lua_getfield, lua_geti, lua_rawgetp, ...
  • set functions (stack -> Lua): lua_setglobal, lua_settable, lua_setfield, lua_seti, lua_rawsetp, ...
  • load/call functions: lua_callk, lua_pcallk, lua_load, lua_dump
  • coroutine functions: lua_yieldk, lua_resume, lua_status, lua_isyieldable
  • garbage collection functions: lua_gc
  • misc functions: lua_error, lua_next, ...
  • functions to be called from debugger: lua_Hook

• Garbarge collection
  • ARC (automatic reference counting)