Non-breaking move of macOS and Darwin checks to Objective-C.jl

src/Metal.jl

@@ -9,6 +9,7 @@ import LLVMDowngrader_jll
 using Preferences: @load_preference, load_preference
 using ExprTools: splitdef, combinedef
 using ObjectiveC, .CoreFoundation, .Foundation, .Dispatch, .OS
+import ObjectiveC: is_macos, darwin_version, macos_version
 import KernelAbstractions
 
 include("version.jl")

src/version.jl

@@ -1,78 +1,3 @@
-# version and support queries
-
-@noinline function _syscall_version(name)
-    size = Ref{Csize_t}()
-    err = @ccall sysctlbyname(name::Cstring, C_NULL::Ptr{Cvoid}, size::Ptr{Csize_t},
-                              C_NULL::Ptr{Cvoid}, 0::Csize_t)::Cint
-    Base.systemerror("sysctlbyname", err != 0)
-
-    osrelease = Vector{UInt8}(undef, size[])
-    err = @ccall sysctlbyname(name::Cstring, osrelease::Ptr{Cvoid}, size::Ptr{Csize_t},
-                              C_NULL::Ptr{Cvoid}, 0::Csize_t)::Cint
-    Base.systemerror("sysctlbyname", err != 0)
-
-    verstr = view(String(osrelease), 1:size[]-1)
-    parse(VersionNumber, verstr)
-end
-
-@static if isdefined(Base, :OncePerProcess) # VERSION >= v"1.12.0-DEV.1421"
-    const darwin_version = OncePerProcess{VersionNumber}() do
-        _syscall_version("kern.osrelease")
-    end
-    const macos_version = OncePerProcess{VersionNumber}() do
-        _syscall_version("kern.osproductversion")
-    end
-else
-    const _darwin_version = Ref{VersionNumber}()
-    function darwin_version()
-        if !isassigned(_darwin_version)
-            _darwin_version[] = _syscall_version("kern.osrelease")
-        end
-        _darwin_version[]
-    end
-
-    const _macos_version = Ref{VersionNumber}()
-    function macos_version()
-        if !isassigned(_macos_version)
-            _macos_version[] = _syscall_version("kern.osproductversion")
-        end
-        _macos_version[]
-    end
-end
-
-@doc """
-    Metal.darwin_version() -> VersionNumber
-
-Returns the host Darwin kernel version.
-
-See also [`Metal.macos_version`](@ref).
-""" darwin_version
-
-@doc """
-    Metal.macos_version() -> VersionNumber
-
-Returns the host macOS version.
-
-See also [`Metal.darwin_version`](@ref).
-""" macos_version
-
-"""
-    Metal.is_macos([ver::VersionNumber]) -> Bool
-
-Returns whether the OS is macOS with version `ver` or newer.
-
-See also [`Metal.macos_version`](@ref).
-"""
-function is_macos(ver=nothing)
-    if !Sys.isapple()
-        false
-    elseif ver === nothing
-        true
-    else
-        macos_version() >= ver
-    end
-end
-
 
 ## support queries
 

test/version.jl

@@ -0,0 +1,11 @@
+@testset "Version" begin
+
+@test Metal.darwin_version() isa VersionNumber
+@test Metal.macos_version() isa VersionNumber
+@test Metal.is_macos(Metal.macos_version())
+
+@test Metal.metallib_support() isa VersionNumber
+@test Metal.air_support() isa VersionNumber
+@test Metal.metal_support() isa VersionNumber
+
+end # testset "Version"