support SharedArrays

[bjarthur]

is there a reason not to support SharedArrays? all this PR does is to use type AbstractArray instead of Array in select function signatures. includes a test.

[bjarthur]

thx for the approval!

[musm]

lgmt.

undefined and null tests are failing on windows any reason to suspect this PR? I don't think they were before

[bjarthur]

egads. well, the "undefined and null" testset is where i inadvertently placed the test for this PR. do SharedArrays perhaps not work on windows? i can't test until monday as i only have access to a windows box at work.

[bjarthur]

the problem appears to have nothing to do with SharedArrays, but rather that h5write behaves differently on windows vs. OS X depending on whether the filename was generated with tempdir() or tempname():

on windows:

julia> h5write(tempdir()*"asdfasdfasdf.tmp", "/data", rand(3,4,5))     # works!

julia> h5write(tempname(), "/data", rand(3,4,5))                       # doesn't work :(
ERROR: This does not appear to be an HDF5 file
Stacktrace:
 [1] #h5open#3(::Bool, ::Function, ::String, ::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::HDF5.HDF5Properties, ::HDF5.HDF5Properties) at C:\Users\arthurb\.julia\v0.6\HDF5\src\HDF5.jl:598
 [2] h5write(::String, ::String, ::SharedArray{UInt16,3}) at C:\Users\arthurb\.julia\v0.6\HDF5\src\HDF5.jl:687

julia> tempname()
"C:\\Users\\arthurb\\AppData\\Local\\Temp\\jl_79FF.tmp"

vs. on OS X:

julia> h5write(tempdir()*"asdfasdfasdf.tmp", "/data", rand(3,4,5))    # works!

julia> h5write(tempname(), "/data", rand(3,4,5))                      # works!

julia> tempname()
"/var/folders/x6/gf97mhtj7kd967vg252ygy4nmsxs4y/T/juliaE1apIA"

ideas why this would be the case?

[musm]

Even simpler

# Windows behavior
julia> f1 = tempdir()*"adf.tmp"
"C:\\Users\\Mus\\AppData\\Local\\Temp\\adf.tmp"

julia> f2 = tempname()
"C:\\Users\\Mus\\AppData\\Local\\Temp\\jl_4E2F.tmp"

julia> ishdf5(f1)
true

julia> ishdf5(f2)
false

[musm]

In the first case windows does not create the file f1 in the second case windows does create the file f2 and thus ishdf5(f2) fails

[musm]

ref JuliaLang/julia#25530