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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.
*/
#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/pointer.h>
#include <thrust/detail/type_traits.h>
THRUST_NAMESPACE_BEGIN
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::pointer()
: super_t(static_cast<Element*>(nullptr))
{} // end pointer::pointer
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::pointer(std::nullptr_t)
: super_t(static_cast<Element*>(nullptr))
{} // end pointer::pointer
template<typename Element, typename Tag, typename Reference, typename Derived>
template<typename OtherElement>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::pointer(OtherElement *other)
: super_t(other)
{} // end pointer::pointer
template<typename Element, typename Tag, typename Reference, typename Derived>
template<typename OtherPointer>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::pointer(const OtherPointer &other,
typename thrust::detail::enable_if_pointer_is_convertible<
OtherPointer,
pointer<Element,Tag,Reference,Derived>
>::type *)
: super_t(thrust::detail::pointer_traits<OtherPointer>::get(other))
{} // end pointer::pointer
template<typename Element, typename Tag, typename Reference, typename Derived>
template<typename OtherPointer>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::pointer(const OtherPointer &other,
typename thrust::detail::enable_if_void_pointer_is_system_convertible<
OtherPointer,
pointer<Element,Tag,Reference,Derived>
>::type *)
: super_t(static_cast<Element *>(thrust::detail::pointer_traits<OtherPointer>::get(other)))
{} // end pointer::pointer
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
typename pointer<Element,Tag,Reference,Derived>::derived_type &
pointer<Element,Tag,Reference,Derived>
::operator=(decltype(nullptr))
{
super_t::base_reference() = nullptr;
return static_cast<derived_type&>(*this);
} // end pointer::operator=
template<typename Element, typename Tag, typename Reference, typename Derived>
template<typename OtherPointer>
__host__ __device__
typename thrust::detail::enable_if_pointer_is_convertible<
OtherPointer,
pointer<Element,Tag,Reference,Derived>,
typename pointer<Element,Tag,Reference,Derived>::derived_type &
>::type
pointer<Element,Tag,Reference,Derived>
::operator=(const OtherPointer &other)
{
super_t::base_reference() = thrust::detail::pointer_traits<OtherPointer>::get(other);
return static_cast<derived_type&>(*this);
} // end pointer::operator=
namespace detail
{
// Implementation for dereference() when Reference is Element&,
// e.g. cuda's managed_memory_pointer
template <typename Reference, typename Derived>
__host__ __device__
Reference pointer_dereference_impl(const Derived& ptr,
thrust::detail::true_type /* is_cpp_ref */)
{
return *ptr.get();
}
// Implementation for pointers with proxy references:
template <typename Reference, typename Derived>
__host__ __device__
Reference pointer_dereference_impl(const Derived& ptr,
thrust::detail::false_type /* is_cpp_ref */)
{
return Reference(ptr);
}
} // namespace detail
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
typename pointer<Element,Tag,Reference,Derived>::super_t::reference
pointer<Element,Tag,Reference,Derived>
::dereference() const
{
// Need to handle cpp refs and fancy refs differently:
typedef typename super_t::reference RefT;
typedef typename thrust::detail::is_reference<RefT>::type IsCppRef;
const derived_type& derivedPtr = static_cast<const derived_type&>(*this);
return detail::pointer_dereference_impl<RefT>(derivedPtr, IsCppRef());
} // end pointer::dereference
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
Element *pointer<Element,Tag,Reference,Derived>
::get() const
{
return super_t::base();
} // end pointer::get
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
Element *pointer<Element,Tag,Reference,Derived>
::operator->() const
{
return super_t::base();
} // end pointer::operator->
template<typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
pointer<Element,Tag,Reference,Derived>
::operator bool() const
{
return bool(get());
} // end pointer::operator bool
template<typename Element, typename Tag, typename Reference, typename Derived,
typename charT, typename traits>
__host__
std::basic_ostream<charT, traits> &
operator<<(std::basic_ostream<charT, traits> &os,
const pointer<Element, Tag, Reference, Derived> &p) {
return os << p.get();
}
// NOTE: These are needed so that Thrust smart pointers work with
// `std::unique_ptr`.
template <typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
bool operator==(std::nullptr_t, pointer<Element, Tag, Reference, Derived> p)
{
return nullptr == p.get();
}
template <typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
bool operator==(pointer<Element, Tag, Reference, Derived> p, std::nullptr_t)
{
return nullptr == p.get();
}
template <typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
bool operator!=(std::nullptr_t, pointer<Element, Tag, Reference, Derived> p)
{
return !(nullptr == p);
}
template <typename Element, typename Tag, typename Reference, typename Derived>
__host__ __device__
bool operator!=(pointer<Element, Tag, Reference, Derived> p, std::nullptr_t)
{
return !(nullptr == p);
}
THRUST_NAMESPACE_END
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