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// Copyright (c) 2018 NVIDIA Corporation
// Author: Bryce Adelstein Lelbach <brycelelbach@gmail.com>
//
// Distributed under the Boost Software License v1.0 (boost.org/LICENSE_1_0.txt)
#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/cpp11_required.h>
#if THRUST_CPP_DIALECT >= 2011
#include <thrust/detail/raw_pointer_cast.h>
#include <thrust/detail/type_deduction.h>
#include <thrust/detail/memory_algorithms.h>
#include <thrust/detail/allocator/allocator_traits.h>
#include <utility>
#include <thrust/detail/memory_wrapper.h>
THRUST_NAMESPACE_BEGIN
// wg21.link/p0316r0
///////////////////////////////////////////////////////////////////////////////
namespace detail
{
template <typename Allocator, typename Pointer>
void allocator_delete_impl(
Allocator const& alloc, Pointer p, std::false_type
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>;
typename traits::allocator_type alloc_T(alloc);
if (nullptr != pointer_traits<Pointer>::get(p))
{
traits::destroy(alloc_T, thrust::raw_pointer_cast(p));
traits::deallocate(alloc_T, p, 1);
}
}
template <typename Allocator, typename Pointer>
void allocator_delete_impl(
Allocator const& alloc, Pointer p, std::true_type
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>;
typename traits::allocator_type alloc_T(alloc);
if (nullptr != pointer_traits<Pointer>::get(p))
{
traits::deallocate(alloc_T, p, 1);
}
}
} // namespace detail
template <typename T, typename Allocator, bool Uninitialized = false>
struct allocator_delete final
{
using allocator_type
= typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type::template rebind<T>::other;
using pointer = typename detail::allocator_traits<allocator_type>::pointer;
template <typename UAllocator>
allocator_delete(UAllocator&& other) noexcept
: alloc_(THRUST_FWD(other))
{}
template <typename U, typename UAllocator>
allocator_delete(
allocator_delete<U, UAllocator> const& other
) noexcept
: alloc_(other.get_allocator())
{}
template <typename U, typename UAllocator>
allocator_delete(
allocator_delete<U, UAllocator>&& other
) noexcept
: alloc_(std::move(other.get_allocator()))
{}
template <typename U, typename UAllocator>
allocator_delete& operator=(
allocator_delete<U, UAllocator> const& other
) noexcept
{
alloc_ = other.get_allocator();
return *this;
}
template <typename U, typename UAllocator>
allocator_delete& operator=(
allocator_delete<U, UAllocator>&& other
) noexcept
{
alloc_ = std::move(other.get_allocator());
return *this;
}
void operator()(pointer p)
{
std::integral_constant<bool, Uninitialized> ic;
detail::allocator_delete_impl(get_allocator(), p, ic);
}
allocator_type& get_allocator() noexcept { return alloc_; }
allocator_type const& get_allocator() const noexcept { return alloc_; }
void swap(allocator_delete& other) noexcept
{
using std::swap;
swap(alloc_, other.alloc_);
}
private:
allocator_type alloc_;
};
template <typename T, typename Allocator>
using uninitialized_allocator_delete = allocator_delete<T, Allocator, true>;
namespace detail {
template <typename Allocator, typename Pointer, typename Size>
void array_allocator_delete_impl(
Allocator const& alloc, Pointer p, Size count, std::false_type
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>;
typename traits::allocator_type alloc_T(alloc);
if (nullptr != pointer_traits<Pointer>::get(p))
{
destroy_n(alloc_T, p, count);
traits::deallocate(alloc_T, p, count);
}
}
template <typename Allocator, typename Pointer, typename Size>
void array_allocator_delete_impl(
Allocator const& alloc, Pointer p, Size count, std::true_type
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>;
typename traits::allocator_type alloc_T(alloc);
if (nullptr != pointer_traits<Pointer>::get(p))
{
traits::deallocate(alloc_T, p, count);
}
}
} // namespace detail
template <typename T, typename Allocator, bool Uninitialized = false>
struct array_allocator_delete final
{
using allocator_type
= typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type::template rebind<T>::other;
using pointer = typename detail::allocator_traits<allocator_type>::pointer;
template <typename UAllocator>
array_allocator_delete(UAllocator&& other, std::size_t n) noexcept
: alloc_(THRUST_FWD(other)), count_(n)
{}
template <typename U, typename UAllocator>
array_allocator_delete(
array_allocator_delete<U, UAllocator> const& other
) noexcept
: alloc_(other.get_allocator()), count_(other.count_)
{}
template <typename U, typename UAllocator>
array_allocator_delete(
array_allocator_delete<U, UAllocator>&& other
) noexcept
: alloc_(std::move(other.get_allocator())), count_(other.count_)
{}
template <typename U, typename UAllocator>
array_allocator_delete& operator=(
array_allocator_delete<U, UAllocator> const& other
) noexcept
{
alloc_ = other.get_allocator();
count_ = other.count_;
return *this;
}
template <typename U, typename UAllocator>
array_allocator_delete& operator=(
array_allocator_delete<U, UAllocator>&& other
) noexcept
{
alloc_ = std::move(other.get_allocator());
count_ = other.count_;
return *this;
}
void operator()(pointer p)
{
std::integral_constant<bool, Uninitialized> ic;
detail::array_allocator_delete_impl(get_allocator(), p, count_, ic);
}
allocator_type& get_allocator() noexcept { return alloc_; }
allocator_type const& get_allocator() const noexcept { return alloc_; }
void swap(array_allocator_delete& other) noexcept
{
using std::swap;
swap(alloc_, other.alloc_);
swap(count_, other.count_);
}
private:
allocator_type alloc_;
std::size_t count_;
};
template <typename T, typename Allocator>
using uninitialized_array_allocator_delete
= array_allocator_delete<T, Allocator, true>;
///////////////////////////////////////////////////////////////////////////////
template <typename Pointer, typename Lambda>
struct tagged_deleter : Lambda
{
__host__ __device__
tagged_deleter(Lambda&& l) : Lambda(THRUST_FWD(l)) {}
using pointer = Pointer;
};
template <typename Pointer, typename Lambda>
__host__ __device__
tagged_deleter<Pointer, Lambda>
make_tagged_deleter(Lambda&& l)
{
return tagged_deleter<Pointer, Lambda>(THRUST_FWD(l));
}
///////////////////////////////////////////////////////////////////////////////
template <typename T, typename Allocator, typename... Args>
__host__
std::unique_ptr<
T,
allocator_delete<
T
, typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>::allocator_type
>
>
allocate_unique(
Allocator const& alloc, Args&&... args
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>;
typename traits::allocator_type alloc_T(alloc);
auto hold_deleter = make_tagged_deleter<typename traits::pointer>(
[&alloc_T] (typename traits::pointer p) {
traits::deallocate(alloc_T, p, 1);
}
);
using hold_t = std::unique_ptr<T, decltype(hold_deleter)>;
auto hold = hold_t(traits::allocate(alloc_T, 1), hold_deleter);
traits::construct(
alloc_T, thrust::raw_pointer_cast(hold.get()), THRUST_FWD(args)...
);
auto deleter = allocator_delete<T, typename traits::allocator_type>(alloc);
return std::unique_ptr<T, decltype(deleter)>
(hold.release(), std::move(deleter));
}
template <typename T, typename Allocator>
__host__
std::unique_ptr<
T,
uninitialized_allocator_delete<
T
, typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>::allocator_type
>
>
uninitialized_allocate_unique(
Allocator const& alloc
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>;
typename traits::allocator_type alloc_T(alloc);
auto hold_deleter = make_tagged_deleter<typename traits::pointer>(
[&alloc_T] (typename traits::pointer p) {
traits::deallocate(alloc_T, p, 1);
}
);
using hold_t = std::unique_ptr<T, decltype(hold_deleter)>;
auto hold = hold_t(traits::allocate(alloc_T, 1), hold_deleter);
auto deleter = uninitialized_allocator_delete<
T, typename traits::allocator_type
>(alloc_T);
return std::unique_ptr<T, decltype(deleter)>
(hold.release(), std::move(deleter));
}
template <typename T, typename Allocator, typename Size, typename... Args>
__host__
std::unique_ptr<
T[],
array_allocator_delete<
T
, typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>::allocator_type
>
>
allocate_unique_n(
Allocator const& alloc, Size n, Args&&... args
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>;
typename traits::allocator_type alloc_T(alloc);
auto hold_deleter = make_tagged_deleter<typename traits::pointer>(
[n, &alloc_T] (typename traits::pointer p) {
traits::deallocate(alloc_T, p, n);
}
);
using hold_t = std::unique_ptr<T[], decltype(hold_deleter)>;
auto hold = hold_t(traits::allocate(alloc_T, n), hold_deleter);
uninitialized_construct_n_with_allocator(
alloc_T, hold.get(), n, THRUST_FWD(args)...
);
auto deleter = array_allocator_delete<
T, typename traits::allocator_type
>(alloc_T, n);
return std::unique_ptr<T[], decltype(deleter)>
(hold.release(), std::move(deleter));
}
template <typename T, typename Allocator, typename Size>
__host__
std::unique_ptr<
T[],
uninitialized_array_allocator_delete<
T
, typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>::allocator_type
>
>
uninitialized_allocate_unique_n(
Allocator const& alloc, Size n
)
{
using traits = typename detail::allocator_traits<
typename std::remove_cv<
typename std::remove_reference<Allocator>::type
>::type
>::template rebind_traits<T>;
typename traits::allocator_type alloc_T(alloc);
auto hold_deleter = make_tagged_deleter<typename traits::pointer>(
[n, &alloc_T] (typename traits::pointer p) {
traits::deallocate(alloc_T, p, n);
}
);
using hold_t = std::unique_ptr<T[], decltype(hold_deleter)>;
auto hold = hold_t(traits::allocate(alloc_T, n), hold_deleter);
auto deleter = uninitialized_array_allocator_delete<
T, typename traits::allocator_type
>(alloc_T, n);
return std::unique_ptr<T[], decltype(deleter)>
(hold.release(), std::move(deleter));
}
///////////////////////////////////////////////////////////////////////////////
THRUST_NAMESPACE_END
#endif // THRUST_CPP_DIALECT >= 2011
|
