mirror of https://github.com/GOSTSec/ccminer
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.
158 lines
4.2 KiB
158 lines
4.2 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. |
|
*/ |
|
|
|
#include <thrust/detail/allocator/destroy_range.h> |
|
#include <thrust/detail/allocator/allocator_traits.h> |
|
#include <thrust/detail/type_traits/pointer_traits.h> |
|
#include <thrust/for_each.h> |
|
#include <memory> |
|
|
|
namespace thrust |
|
{ |
|
namespace detail |
|
{ |
|
namespace allocator_traits_detail |
|
{ |
|
|
|
|
|
// destroy_range has three cases: |
|
// if Allocator has an effectful member function destroy: |
|
// 1. destroy via the allocator |
|
// else |
|
// 2. if T has a non-trivial destructor, destroy the range without using the allocator |
|
// 3. if T has a trivial destructor, do a no-op |
|
|
|
template<typename Allocator, typename T> |
|
struct has_effectful_member_destroy |
|
: has_member_destroy<Allocator,T> |
|
{}; |
|
|
|
// std::allocator::destroy's only effect is to invoke its argument's destructor |
|
template<typename U, typename T> |
|
struct has_effectful_member_destroy<std::allocator<U>, T> |
|
: thrust::detail::false_type |
|
{}; |
|
|
|
// case 1: Allocator has an effectful 1-argument member function "destroy" |
|
template<typename Allocator, typename Pointer> |
|
struct enable_if_destroy_range_case1 |
|
: thrust::detail::enable_if< |
|
has_effectful_member_destroy< |
|
Allocator, |
|
typename pointer_element<Pointer>::type |
|
>::value |
|
> |
|
{}; |
|
|
|
// case 2: Allocator has no member function "destroy", but T has a non-trivial destructor |
|
template<typename Allocator, typename Pointer> |
|
struct enable_if_destroy_range_case2 |
|
: thrust::detail::enable_if< |
|
!has_effectful_member_destroy< |
|
Allocator, |
|
typename pointer_element<Pointer>::type |
|
>::value && |
|
!has_trivial_destructor< |
|
typename pointer_element<Pointer>::type |
|
>::value |
|
> |
|
{}; |
|
|
|
// case 3: Allocator has no member function "destroy", and T has a trivial destructor |
|
template<typename Allocator, typename Pointer> |
|
struct enable_if_destroy_range_case3 |
|
: thrust::detail::enable_if< |
|
!has_effectful_member_destroy< |
|
Allocator, |
|
typename pointer_element<Pointer>::type |
|
>::value && |
|
has_trivial_destructor< |
|
typename pointer_element<Pointer>::type |
|
>::value |
|
> |
|
{}; |
|
|
|
|
|
|
|
template<typename Allocator> |
|
struct destroy_via_allocator |
|
{ |
|
Allocator &a; |
|
|
|
destroy_via_allocator(Allocator &a) |
|
: a(a) |
|
{} |
|
|
|
template<typename T> |
|
inline __host__ __device__ |
|
void operator()(T &x) |
|
{ |
|
allocator_traits<Allocator>::destroy(a, &x); |
|
} |
|
}; |
|
|
|
|
|
// destroy_range case 1: destroy via allocator |
|
template<typename Allocator, typename Pointer, typename Size> |
|
typename enable_if_destroy_range_case1<Allocator,Pointer>::type |
|
destroy_range(Allocator &a, Pointer p, Size n) |
|
{ |
|
thrust::for_each_n(allocator_system<Allocator>::get(a), p, n, destroy_via_allocator<Allocator>(a)); |
|
} |
|
|
|
|
|
// we must prepare for His coming |
|
struct gozer |
|
{ |
|
template<typename T> |
|
inline __host__ __device__ |
|
void operator()(T &x) |
|
{ |
|
x.~T(); |
|
} |
|
}; |
|
|
|
// destroy_range case 2: destroy without the allocator |
|
template<typename Allocator, typename Pointer, typename Size> |
|
typename enable_if_destroy_range_case2<Allocator,Pointer>::type |
|
destroy_range(Allocator &a, Pointer p, Size n) |
|
{ |
|
thrust::for_each_n(allocator_system<Allocator>::get(a), p, n, gozer()); |
|
} |
|
|
|
|
|
// destroy_range case 3: no-op |
|
template<typename Allocator, typename Pointer, typename Size> |
|
typename enable_if_destroy_range_case3<Allocator,Pointer>::type |
|
destroy_range(Allocator &, Pointer, Size) |
|
{ |
|
// no op |
|
} |
|
|
|
|
|
} // end allocator_traits_detail |
|
|
|
|
|
template<typename Allocator, typename Pointer, typename Size> |
|
void destroy_range(Allocator &a, Pointer p, Size n) |
|
{ |
|
return allocator_traits_detail::destroy_range(a,p,n); |
|
} |
|
|
|
|
|
} // end detail |
|
} // end thrust |
|
|
|
|