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8 changes: 6 additions & 2 deletions src/msqueue.jl
Original file line number Diff line number Diff line change
Expand Up @@ -23,17 +23,21 @@ function Base.push!(queue::ConcurrentQueue{T}, v) where {T}
v = convert(T, v)
node = MSQNode{T}(nothing, v)

tail = @atomic queue.tail
while true
tail = @atomic queue.tail
next = @atomic tail.next
if next === nothing
next, ok = @atomicreplace(tail.next, next => node)
if ok
@atomicreplace(queue.tail, tail => node)
return queue
end
tail = @atomic queue.tail
else
tail, _ = @atomicreplace(queue.tail, tail => next)
tail, ok = @atomicreplace(queue.tail, tail => next)
if ok
tail = next
end
end
end
end
Expand Down