Allow any backing array type and add Adapt support

Author: darsnack

Project.toml

@@ -3,6 +3,9 @@ uuid = "9de3a189-e0c0-4e15-ba3b-b14b9fb0aec1"
 authors = ["Jun Tian <tianjun.cpp@gmail.com> and contributors"]
 version = "0.1.5"
 
+[deps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
+
 [compat]
 julia = "1"
 

src/CircularArrayBuffers.jl

@@ -1,5 +1,7 @@
 module CircularArrayBuffers
 
+using Adapt
+
 export CircularArrayBuffer, CircularVectorBuffer, capacity, isfull
 
 """
@@ -8,14 +10,14 @@ export CircularArrayBuffer, CircularVectorBuffer, capacity, isfull
 `CircularArrayBuffer` uses a `N`-dimension `Array` of size `sz` to serve as a buffer for
 `N-1`-dimension `Array`s of the same size.
 """
-mutable struct CircularArrayBuffer{T,N} <: AbstractArray{T,N}
-    buffer::Array{T,N}
+mutable struct CircularArrayBuffer{T,N,S<:AbstractArray{T,N}} <: AbstractArray{T,N}
+    buffer::S
     first::Int
     nframes::Int
     step_size::Int
 end
 
-const CircularVectorBuffer{T} = CircularArrayBuffer{T,1}
+const CircularVectorBuffer{T,S} = CircularArrayBuffer{T,1,S}
 
 CircularVectorBuffer{T}(n::Integer) where {T} = CircularArrayBuffer{T}(n)
 
@@ -28,6 +30,9 @@ function CircularArrayBuffer(A::AbstractArray{T,N}) where {T,N}
     CircularArrayBuffer(A, 1, size(A, N), N == 1 ? 1 : *(size(A)[1:end-1]...))
 end
 
+Adapt.adapt_structure(to, cb::CircularArrayBuffer) =
+    CircularArrayBuffer(adapt(to, cb.buffer), cb.first, cb.nframes, cb.step_size)
+
 Base.IndexStyle(::CircularArrayBuffer) = IndexLinear()
 
 Base.size(cb::CircularArrayBuffer{T,N}, i::Integer) where {T,N} = i == N ? cb.nframes : size(cb.buffer, i)