Skip to content

JuliaFolds2/StableTasks.jl

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

31 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

StableTasks.jl

StableTasks is a simple package that provides type stable tools for creating (regular and sticky) tasks. It has the following API (not exported):

  • StableTasks.@spawn
  • StableTasks.@spawnat
  • StableTasks.@fetch
  • StableTasks.@fetchfrom

StableTasks.@spawn

It works like Threads.@spawn, except it is type stable to fetch from.

julia> using StableTasks, Test

julia> @inferred fetch(StableTasks.@spawn 1 + 1)
2

versus

julia> @inferred fetch(Threads.@spawn 1 + 1)
ERROR: return type Int64 does not match inferred return type Any
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] top-level scope
   @ REPL[3]:1

StableTasks.@spawnat

The package also provides StableTasks.@spawnat, which is similar to StableTasks.@spawn but creates a sticky task (that won't migrate) on a specific thread.

julia> t = StableTasks.@spawnat 4 Threads.threadid();

julia> @inferred fetch(t)
4

StableTasks.@fetch and StableTasks.@fetchfrom

For convenience, and in analogy to at Distributed.jl, we also provide @fetch and @fetchfrom macros:

julia> StableTasks.@fetch 3+3
6

julia> StableTasks.@fetchfrom 2 Threads.threadid()
2