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/*
* Copyright 2008-2021 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
* \brief Algorithms for asynchronously copying a range.
*/
#pragma once
#include <thrust/detail/config.h>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <thrust/detail/cpp14_required.h>
#if THRUST_CPP_DIALECT >= 2014
#include <thrust/detail/static_assert.h>
#include <thrust/detail/select_system.h>
#include <thrust/type_traits/remove_cvref.h>
#include <thrust/system/detail/adl/async/copy.h>
#include <thrust/event.h>
THRUST_NAMESPACE_BEGIN
namespace async
{
/*! \cond
*/
namespace unimplemented
{
template <
typename FromPolicy, typename ToPolicy
, typename ForwardIt, typename Sentinel, typename OutputIt
>
__host__
event<FromPolicy>
async_copy(
thrust::execution_policy<FromPolicy>& from_exec
, thrust::execution_policy<ToPolicy>& to_exec
, ForwardIt first, Sentinel last, OutputIt output
)
{
THRUST_STATIC_ASSERT_MSG(
(thrust::detail::depend_on_instantiation<ForwardIt, false>::value)
, "this algorithm is not implemented for the specified system"
);
return {};
}
} // namespace unimplemented
namespace copy_detail
{
using thrust::async::unimplemented::async_copy;
struct copy_fn final
{
template <
typename FromPolicy, typename ToPolicy
, typename ForwardIt, typename Sentinel, typename OutputIt
>
__host__
static auto call(
thrust::detail::execution_policy_base<FromPolicy> const& from_exec
, thrust::detail::execution_policy_base<ToPolicy> const& to_exec
, ForwardIt&& first, Sentinel&& last
, OutputIt&& output
)
// ADL dispatch.
THRUST_RETURNS(
async_copy(
thrust::detail::derived_cast(thrust::detail::strip_const(from_exec))
, thrust::detail::derived_cast(thrust::detail::strip_const(to_exec))
, THRUST_FWD(first), THRUST_FWD(last)
, THRUST_FWD(output)
)
)
template <
typename DerivedPolicy
, typename ForwardIt, typename Sentinel, typename OutputIt
>
__host__
static auto call(
thrust::detail::execution_policy_base<DerivedPolicy> const& exec
, ForwardIt&& first, Sentinel&& last
, OutputIt&& output
)
THRUST_RETURNS(
copy_fn::call(
thrust::detail::derived_cast(thrust::detail::strip_const(exec))
// Synthesize a suitable new execution policy, because we don't want to
// try and extract twice from the one we were passed.
, typename remove_cvref_t<
decltype(thrust::detail::derived_cast(thrust::detail::strip_const(exec)))
>::tag_type{}
, THRUST_FWD(first), THRUST_FWD(last)
, THRUST_FWD(output)
)
)
template <typename ForwardIt, typename Sentinel, typename OutputIt>
__host__
static auto call(ForwardIt&& first, Sentinel&& last, OutputIt&& output)
THRUST_RETURNS(
copy_fn::call(
thrust::detail::select_system(
typename thrust::iterator_system<remove_cvref_t<ForwardIt>>::type{}
)
, thrust::detail::select_system(
typename thrust::iterator_system<remove_cvref_t<OutputIt>>::type{}
)
, THRUST_FWD(first), THRUST_FWD(last)
, THRUST_FWD(output)
)
)
template <typename... Args>
THRUST_NODISCARD __host__
auto operator()(Args&&... args) const
THRUST_RETURNS(
call(THRUST_FWD(args)...)
)
};
} // namespace copy_detail
THRUST_INLINE_CONSTANT copy_detail::copy_fn copy{};
/*! \endcond
*/
} // namespace async
THRUST_NAMESPACE_END
#endif
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