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low level Waitall #639

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18 changes: 12 additions & 6 deletions src/nonblocking.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -244,7 +244,7 @@ end


"""
Waitall(reqs::AbstractVector{Request}[, statuses::Vector{Status}])
Waitall([count::Integer,] reqs::AbstractVector{Request}[, statuses::Vector{Status}])
statuses = Waitall(reqs::AbstractVector{Request}, Status)

Block until all active requests in the array `reqs` are complete.
Expand All @@ -255,15 +255,20 @@ each request.
# External links
$(_doc_external("MPI_Waitall"))
"""
function Waitall(reqs::RequestSet, statuses::Union{AbstractVector{Status},Nothing}=nothing)
n = length(reqs)
n == 0 && return nothing
@assert isnothing(statuses) || length(statuses) >= n
function Waitall(count::Integer, reqs::AbstractVector{MPI_Request}, statuses::Union{AbstractVector{Status},Nothing}=nothing)
# int MPI_Waitall(int count, MPI_Request array_of_requests[],
# MPI_Status array_of_statuses[])
@mpichk ccall((:MPI_Waitall, libmpi), Cint,
(Cint, Ptr{MPI_Request}, Ptr{Status}),
n, reqs.vals, something(statuses, Consts.MPI_STATUSES_IGNORE[]))
count, reqs, something(statuses, Consts.MPI_STATUSES_IGNORE[]))

return nothing
end
function Waitall(reqs::RequestSet, statuses::Union{AbstractVector{Status},Nothing}=nothing)
n = length(reqs)
n == 0 && return nothing
@assert isnothing(statuses) || length(statuses) >= n
Waitall(n, reqs.vals, statuses)
update!(reqs)
return nothing
end
Expand All @@ -272,6 +277,7 @@ function Waitall(reqs::RequestSet, ::Type{Status})
Waitall(reqs, statuses)
return statuses
end

Waitall(reqs::AbstractVector{Request}, args...) = Waitall(RequestSet(reqs), args...)


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