GOSTCoin CUDA miner project, compatible with most nvidia cards, containing only gostd algo
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

159 lines
4.6 KiB

/*
* 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.
*/
/*! \file temporary_array.h
* \brief Container-like class temporary storage inside algorithms.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/iterator/retag.h>
#include <thrust/detail/contiguous_storage.h>
#include <thrust/detail/allocator/temporary_allocator.h>
#include <thrust/detail/allocator/no_throw_allocator.h>
#include <memory>
namespace thrust
{
namespace detail
{
template<typename T, typename System>
class temporary_array
: public contiguous_storage<
T,
no_throw_allocator<
temporary_allocator<T,System>
>
>
{
private:
typedef contiguous_storage<
T,
no_throw_allocator<
temporary_allocator<T,System>
>
> super_t;
// to help out the constructor
typedef no_throw_allocator<temporary_allocator<T,System> > alloc_type;
public:
typedef typename super_t::size_type size_type;
temporary_array(thrust::execution_policy<System> &system, size_type n);
// provide a kill-switch to explicitly avoid initialization
temporary_array(int uninit, thrust::execution_policy<System> &system, size_type n);
template<typename InputIterator>
temporary_array(thrust::execution_policy<System> &system,
InputIterator first,
size_type n);
template<typename InputIterator, typename InputSystem>
temporary_array(thrust::execution_policy<System> &system,
thrust::execution_policy<InputSystem> &input_system,
InputIterator first,
size_type n);
template<typename InputIterator>
temporary_array(thrust::execution_policy<System> &system,
InputIterator first,
InputIterator last);
template<typename InputSystem, typename InputIterator>
temporary_array(thrust::execution_policy<System> &system,
thrust::execution_policy<InputSystem> &input_system,
InputIterator first,
InputIterator last);
~temporary_array();
}; // end temporary_array
// XXX eliminate this when we do ranges for real
template<typename Iterator, typename System>
class tagged_iterator_range
{
public:
typedef thrust::detail::tagged_iterator<Iterator,System> iterator;
template<typename Ignored1, typename Ignored2>
tagged_iterator_range(const Ignored1 &, const Ignored2 &, Iterator first, Iterator last)
: m_begin(reinterpret_tag<System>(first)),
m_end(reinterpret_tag<System>(last))
{}
iterator begin(void) const { return m_begin; }
iterator end(void) const { return m_end; }
private:
iterator m_begin, m_end;
};
// if FromSystem is convertible to ToSystem, then just make a shallow
// copy of the range. else, use a temporary_array
// note that the resulting iterator is explicitly tagged with ToSystem either way
template<typename Iterator, typename FromSystem, typename ToSystem>
struct move_to_system_base
: public eval_if<
is_convertible<
FromSystem,
ToSystem
>::value,
identity_<
tagged_iterator_range<Iterator,ToSystem>
>,
identity_<
temporary_array<
typename thrust::iterator_value<Iterator>::type,
ToSystem
>
>
>
{};
template<typename Iterator, typename FromSystem, typename ToSystem>
class move_to_system
: public move_to_system_base<
Iterator,
FromSystem,
ToSystem
>::type
{
typedef typename move_to_system_base<Iterator,FromSystem,ToSystem>::type super_t;
public:
move_to_system(thrust::execution_policy<FromSystem> &from_system,
thrust::execution_policy<ToSystem> &to_system,
Iterator first,
Iterator last)
: super_t(to_system, from_system, first, last) {}
};
} // end detail
} // end thrust
#include <thrust/detail/temporary_array.inl>