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Fix multi thread env state in case N=1 #968

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Fix multi thread env state in case N=1 #968

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9 changes: 7 additions & 2 deletions src/ReinforcementLearningZoo/src/algorithms/policy_gradient/multi_thread_env.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,12 @@ const MULTI_THREAD_ENV_CACHE = IdDict{AbstractEnv,Dict{Symbol,Array}}()
function RLBase.state(env::MultiThreadEnv)
N = ndims(env.states)
@sync for i in 1:length(env)
@spawn selectdim(env.states, N, i) .= state(env[i])
@spawn begin
if N == 1
env.states[i] .= state(env[i])
else
selectdim(env.states, N, i) .= state(env[i])
end
end
env.states
end
Expand Down Expand Up @@ -167,7 +172,7 @@ function RLBase.plan!(π::QBasedPolicy, env::MultiThreadEnv, ::FullActionSet, A)
]
end

function RLBase.plan!(π::QBasedPolicy,
function RLBase.plan!(π::QBasedPolicy,
env::MultiThreadEnv,
::MinimalActionSet,
::Space{<:Vector{<:Base.OneTo{<:Integer}}},
Expand Down