https://github.com/juliaactors/guards.jl

Actors guarding access to mutable variables
https://github.com/juliaactors/guards.jl

actor-framework actors concurrency concurrent-programming

Last synced: 4 months ago
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Actors guarding access to mutable variables

• Host: GitHub
• URL: https://github.com/juliaactors/guards.jl
• Owner: JuliaActors
• License: mit
• Created: 2020-12-01T06:35:38.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-04-29T17:47:26.000Z (about 4 years ago)
• Last Synced: 2025-01-20T18:43:25.058Z (5 months ago)
• Topics: actor-framework, actors, concurrency, concurrent-programming
• Language: Julia
• Homepage:
• Size: 194 KB
• Stars: 7
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Guards

Let actors guard your mutable variables!

[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaActors.github.io/Guards.jl/stable)

[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://JuliaActors.github.io/Guards.jl/dev)

[![Build Status](https://github.com/JuliaActors/Guards.jl/workflows/CI/badge.svg)](https://github.com/JuliaActors/Guards.jl/actions)

[![Coverage](https://codecov.io/gh/JuliaActors/Guards.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaActors/Guards.jl)

With `Guards` you can wrap mutable variables into a `:guard` actor. That way they can be safely accessed from parallel threads and distributed worker processes via message passing.

## Example

```julia

julia> using Guards

julia> gd = guard([1,2,3])  # start a guards actor around an array

Guards.Guard{Array{Int64,1}}(Link{Channel{Any}}(Channel{Any}(sz_max:32,sz_curr:0), 1, :guard))

julia> call(gd)             # get a deep copy of it

3-element Array{Int64,1}:

 1

 2

 3

julia> push!(call(gd), 4)   # pushing to it ...

4-element Array{Int64,1}:

 1

 2

 3

 4

julia> call(gd)             # the guarded variable has not changed

3-element Array{Int64,1}:

 1

 2

 3

julia> call(gd, push!, 4);  # if you call it with push!,

julia> @grd gd              # ... it got changed (here using the @grd macro)

4-element Array{Int64,1}:

 1

 2

 3

 4

julia> @grd pop!(gd)        # pop! with the macro

4

julia> update!(gd, [5,6,7,8])

4-element Array{Int64,1}:

 5

 6

 7

 8

julia> @grd gd

4-element Array{Int64,1}:

 5

 6

 7

 8

```

`Guards` is part of [`JuliaActors`](https://github.com/JuliaActors).

## Author(s)

- Paul Bayer

**License:** MIT