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/*
* Copyright 2008-2013 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/tuple.h>
#include <thrust/detail/tuple_meta_transform.h>
THRUST_NAMESPACE_BEGIN
namespace detail
{
template<typename Tuple,
template<typename> class UnaryMetaFunction,
typename UnaryFunction,
typename IndexSequence = thrust::make_index_sequence<thrust::tuple_size<Tuple>::value>>
struct tuple_transform_functor;
template<typename Tuple,
template<typename> class UnaryMetaFunction,
typename UnaryFunction,
size_t... Is>
struct tuple_transform_functor<Tuple,UnaryMetaFunction,UnaryFunction,thrust::index_sequence<Is...>>
{
static __host__
typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type
do_it_on_the_host(const Tuple &t, UnaryFunction f)
{
typedef typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type XfrmTuple;
return XfrmTuple(f(thrust::get<Is>(t))...);
}
static __host__ __device__
typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type
do_it_on_the_host_or_device(const Tuple &t, UnaryFunction f)
{
typedef typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type XfrmTuple;
return XfrmTuple(f(thrust::get<Is>(t))...);
}
};
template<template<typename> class UnaryMetaFunction,
typename Tuple,
typename UnaryFunction>
typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type
tuple_host_transform(const Tuple &t, UnaryFunction f)
{
return tuple_transform_functor<Tuple,UnaryMetaFunction,UnaryFunction>::do_it_on_the_host(t,f);
}
template<template<typename> class UnaryMetaFunction,
typename Tuple,
typename UnaryFunction>
typename tuple_meta_transform<Tuple,UnaryMetaFunction>::type
__host__ __device__
tuple_host_device_transform(const Tuple &t, UnaryFunction f)
{
return tuple_transform_functor<Tuple,UnaryMetaFunction,UnaryFunction>::do_it_on_the_host_or_device(t,f);
}
} // end detail
THRUST_NAMESPACE_END
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