length of MPIBuffertype{T}

[kose-y]

Related to #283.

Some functions with the argument of type MPIBuffertype{T} use length of it, but usage of length this way is only valid for AbstractArray{T} input. In particular, Ptr{T} argument would always return 1 as its length, and this may cause unexpected behaviors.

Found in:

MPI.jl/src/collective.jl

Line 100 in 615ca46

Reduce!(sendbuf, recvbuf, length(sendbuf), op, root, comm)

MPI.jl/src/collective.jl

Line 214 in 615ca46

Allreduce!(sendbuf, recvbuf, length(recvbuf), op, comm)

MPI.jl/src/collective.jl

Line 226 in 615ca46

Allreduce!(MPI.IN_PLACE, buf, length(buf), op, comm)

MPI.jl/src/collective.jl

Line 240 in 615ca46

Allreduce!(sendbuf, recvbuf, length(recvbuf), op, comm)

These will/may be fixed with #286, as most of the MPI calls will be modified with it anyway. (It already contains a modification for the first one, and is likely to have modification for the other ones)

[kose-y]

resolved with #302.