GOSTCoin CUDA miner project, compatible with most nvidia cards, containing only gostd algo
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/*
* 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/raw_pointer_cast.h>
#include <thrust/detail/type_traits/pointer_traits.h>
#include <thrust/detail/allocator/allocator_traits.h>
#include <thrust/detail/util/blocking.h>
#include <thrust/pair.h>
namespace thrust
{
namespace detail
{
template<typename ToPointer, typename FromPointer>
__host__ __device__
ToPointer reinterpret_pointer_cast(FromPointer ptr)
{
typedef typename thrust::detail::pointer_element<ToPointer>::type to_element;
return ToPointer(reinterpret_cast<to_element*>(thrust::raw_pointer_cast(ptr)));
}
template<typename Allocator, template <typename> class BaseSystem>
struct execute_with_allocator
: BaseSystem<execute_with_allocator<Allocator, BaseSystem> >
{
Allocator &m_alloc;
execute_with_allocator(Allocator &alloc)
: m_alloc(alloc)
{}
template<typename T>
friend thrust::pair<T*,std::ptrdiff_t>
get_temporary_buffer(execute_with_allocator &system, std::ptrdiff_t n)
{
typedef typename thrust::detail::allocator_traits<Allocator> alloc_traits;
typedef typename alloc_traits::void_pointer void_pointer;
typedef typename alloc_traits::size_type size_type;
typedef typename alloc_traits::value_type value_type;
// how many elements of type value_type do we need to accomodate n elements of type T?
size_type num_elements = thrust::detail::util::divide_ri(sizeof(T) * n, sizeof(value_type));
// allocate that many
void_pointer ptr = alloc_traits::allocate(system.m_alloc, num_elements);
// return the pointer and the number of elements of type T allocated
return thrust::make_pair(thrust::detail::reinterpret_pointer_cast<T*>(ptr),n);
}
template<typename Pointer>
friend void return_temporary_buffer(execute_with_allocator &system, Pointer p)
{
typedef typename thrust::detail::allocator_traits<Allocator> alloc_traits;
typedef typename alloc_traits::pointer pointer;
// return the pointer to the allocator
pointer to_ptr = thrust::detail::reinterpret_pointer_cast<pointer>(p);
alloc_traits::deallocate(system.m_alloc, to_ptr, 0);
}
};
} // end detail
} // end thrust