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#pragma once

#include <thrust/detail/config.h>
#include <thrust/detail/cpp11_required.h>

#if THRUST_CPP_DIALECT >= 2011

#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC

#include <thrust/system/cuda/config.h>

#include <thrust/system/cuda/detail/util.h>
#include <thrust/system/cuda/detail/execution_policy.h>
#include <thrust/system/cuda/detail/util.h>

#include <mutex>
#include <unordered_map>

THRUST_NAMESPACE_BEGIN

namespace cuda_cub
{

template<typename MR, typename DerivedPolicy>
__host__
MR * get_per_device_resource(execution_policy<DerivedPolicy>&)
{
    static std::mutex map_lock;
    static std::unordered_map<int, MR> device_id_to_resource;

    int device_id;
    thrust::cuda_cub::throw_on_error(cudaGetDevice(&device_id));

    std::lock_guard<std::mutex> lock{map_lock};
    return &device_id_to_resource[device_id];
}

}

THRUST_NAMESPACE_END

#endif

#endif

