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 * modification, are permitted provided that the following conditions are met:
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#pragma once

#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC

#include <thrust/detail/pointer.h>
#include <thrust/detail/raw_pointer_cast.h>
#include <thrust/pair.h>
#include <thrust/system/cuda/config.h>
#include <thrust/system/cuda/detail/execution_policy.h>

BEGIN_NS_THRUST

// XXX forward declare thrust::get/return_temporary_buffer
// to avoid circular include dependency from thrust/memory.h
//
template<typename T, typename DerivedPolicy>
__host__ __device__
thrust::pair<thrust::pointer<T,DerivedPolicy>, typename thrust::pointer<T,DerivedPolicy>::difference_type>
get_temporary_buffer(const thrust::detail::execution_policy_base<DerivedPolicy> &system, typename thrust::pointer<T,DerivedPolicy>::difference_type n);

template<typename DerivedPolicy, typename Pointer>
__host__ __device__
void return_temporary_buffer(const thrust::detail::execution_policy_base<DerivedPolicy> &system, Pointer p);

namespace cuda_cub {

template <class Derived>
__host__ __device__ void *
get_memory_buffer(execution_policy<Derived> &policy, std::ptrdiff_t n)
{
  return (void *)thrust::raw_pointer_cast(
      thrust::get_temporary_buffer<char>(policy, n).first);
}

template <class Derived>
void __host__ __device__
return_memory_buffer(execution_policy<Derived> &policy, void* ptr)
{
  thrust::return_temporary_buffer(policy,ptr);
}

}    // namespace cuda_cub
END_NS_THRUST

// include thrust/memory.h  after
// we define get/return_memory_buffer
// 
//#include <thrust/memory.h>

#endif