# This file is a part of Julia. License is MIT: http://julialang.org/license
import Base: put!, wait, isready, take!, fetch
type DictChannel <: AbstractChannel
d::Dict
cond_take::Condition # waiting for data to become available
DictChannel() = new(Dict(), Condition())
end
function put!(D::DictChannel, k, v)
D.d[k] = v
notify(D.cond_take)
D
end
function take!(D::DictChannel, k)
v=fetch(D,k)
delete!(D.d, k)
v
end
isready(D::DictChannel) = length(D.d) > 1
isready(D::DictChannel, k) = haskey(D.d,k)
function fetch(D::DictChannel, k)
wait(D,k)
D.d[k]
end
function wait(D::DictChannel, k)
while !isready(D, k)
wait(D.cond_take)
end
end
# Usage:
# RemoteRef to a DictChannel on worker pid
# dc_ref=RemoteRef(()->DictChannel(), pid)
# Test if there is any data
# isready(dc_ref)
# add
# put!(dc_ref, 1, 2)
# Test if key 1 exists
# isready(dc_ref, 1)
# fetch key 1
# fetch(dc_ref, 1)
# fetch and remove key 1
# take!(dc_ref, 1)
# wait for key 3 to be added
# wait(dc_ref, 3)