~ubuntu-branches/ubuntu/utopic/libthrust/utopic

/*

 *  Copyright 2008-2012 NVIDIA Corporation

 *

 *  Licensed under the Apache License, Version 2.0 (the "License");

 *  you may not use this file except in compliance with the License.

 *  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *  Unless required by applicable law or agreed to in writing, software

 *  distributed under the License is distributed on an "AS IS" BASIS,

 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *  See the License for the specific language governing permissions and

 *  limitations under the License.

 */

 

#pragma once

 

#include <thrust/detail/config.h>

#include <thrust/detail/execution_policy.h>

#include <thrust/pair.h>

#include <thrust/detail/pointer.h>

#include <thrust/detail/raw_pointer_cast.h>

#include <thrust/system/detail/generic/temporary_buffer.h>

#include <thrust/system/detail/adl/temporary_buffer.h>

 

namespace thrust

{

namespace detail

{

namespace get_temporary_buffer_detail

{

 

 

template<typename T, typename DerivedPolicy, typename Pair>

  thrust::pair<thrust::pointer<T,DerivedPolicy>, typename thrust::pointer<T,DerivedPolicy>::difference_type>

    down_cast_pair(Pair p)

{

  // XXX should use a hypothetical thrust::static_pointer_cast here

  thrust::pointer<T,DerivedPolicy> ptr = thrust::pointer<T,DerivedPolicy>(static_cast<T*>(thrust::raw_pointer_cast(p.first)));

 

  typedef thrust::pair<thrust::pointer<T,DerivedPolicy>, typename thrust::pointer<T,DerivedPolicy>::difference_type> result_type;

  return result_type(ptr, p.second);

} // end down_cast_pair()

 

 

} // end get_temporary_buffer_detail

} // end detail

 

 

template<typename T, typename DerivedPolicy>

  thrust::pair<thrust::pointer<T,DerivedPolicy>, typename thrust::pointer<T,DerivedPolicy>::difference_type>

    get_temporary_buffer(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, typename thrust::pointer<T,DerivedPolicy>::difference_type n)

{

  using thrust::system::detail::generic::get_temporary_buffer;

 

  return thrust::detail::get_temporary_buffer_detail::down_cast_pair<T,DerivedPolicy>(get_temporary_buffer<T>(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), n));

} // end get_temporary_buffer()

 

 

template<typename DerivedPolicy, typename Pointer>

  void return_temporary_buffer(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, Pointer p)

{

  using thrust::system::detail::generic::return_temporary_buffer;

 

  return return_temporary_buffer(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), p);

} // end return_temporary_buffer()

 

 

} // end thrust