1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright 2008-2013 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 temporary_array.h
* \brief Container-like class temporary storage inside algorithms.
*/
#pragma once
#include <thrust/detail/config.h>
THRUST_NAMESPACE_BEGIN
namespace detail
{
// Forward declare temporary_array, as it's used by the CUDA copy backend, which
// is included in contiguous_storage's definition.
template<typename T, typename System>
class temporary_array;
} // end detail
THRUST_NAMESPACE_END
#include <thrust/detail/config.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/iterator/detail/tagged_iterator.h>
#include <thrust/detail/contiguous_storage.h>
#include <thrust/detail/allocator/temporary_allocator.h>
#include <thrust/detail/allocator/no_throw_allocator.h>
#include <thrust/detail/memory_wrapper.h>
THRUST_NAMESPACE_BEGIN
namespace detail
{
template<typename T, typename System>
class temporary_array
: public contiguous_storage<
T,
no_throw_allocator<
temporary_allocator<T,System>
>
>
{
private:
typedef contiguous_storage<
T,
no_throw_allocator<
temporary_allocator<T,System>
>
> super_t;
// to help out the constructor
typedef no_throw_allocator<temporary_allocator<T,System> > alloc_type;
public:
typedef typename super_t::size_type size_type;
__host__ __device__
temporary_array(thrust::execution_policy<System> &system);
__host__ __device__
temporary_array(thrust::execution_policy<System> &system, size_type n);
// provide a kill-switch to explicitly avoid initialization
__host__ __device__
temporary_array(int uninit, thrust::execution_policy<System> &system, size_type n);
template<typename InputIterator>
__host__ __device__
temporary_array(thrust::execution_policy<System> &system,
InputIterator first,
size_type n);
template<typename InputIterator, typename InputSystem>
__host__ __device__
temporary_array(thrust::execution_policy<System> &system,
thrust::execution_policy<InputSystem> &input_system,
InputIterator first,
size_type n);
template<typename InputIterator>
__host__ __device__
temporary_array(thrust::execution_policy<System> &system,
InputIterator first,
InputIterator last);
template<typename InputSystem, typename InputIterator>
__host__ __device__
temporary_array(thrust::execution_policy<System> &system,
thrust::execution_policy<InputSystem> &input_system,
InputIterator first,
InputIterator last);
__host__ __device__
~temporary_array();
}; // end temporary_array
// XXX eliminate this when we do ranges for real
template<typename Iterator, typename System>
class tagged_iterator_range
{
public:
typedef thrust::detail::tagged_iterator<Iterator,System> iterator;
template<typename Ignored1, typename Ignored2>
tagged_iterator_range(const Ignored1 &, const Ignored2 &, Iterator first, Iterator last)
: m_begin(first),
m_end(last)
{}
iterator begin(void) const { return m_begin; }
iterator end(void) const { return m_end; }
private:
iterator m_begin, m_end;
};
// if FromSystem is convertible to ToSystem, then just make a shallow
// copy of the range. else, use a temporary_array
// note that the resulting iterator is explicitly tagged with ToSystem either way
template<typename Iterator, typename FromSystem, typename ToSystem>
struct move_to_system_base
: public eval_if<
is_convertible<
FromSystem,
ToSystem
>::value,
identity_<
tagged_iterator_range<Iterator,ToSystem>
>,
identity_<
temporary_array<
typename thrust::iterator_value<Iterator>::type,
ToSystem
>
>
>
{};
template<typename Iterator, typename FromSystem, typename ToSystem>
class move_to_system
: public move_to_system_base<
Iterator,
FromSystem,
ToSystem
>::type
{
typedef typename move_to_system_base<Iterator,FromSystem,ToSystem>::type super_t;
public:
move_to_system(thrust::execution_policy<FromSystem> &from_system,
thrust::execution_policy<ToSystem> &to_system,
Iterator first,
Iterator last)
: super_t(to_system, from_system, first, last) {}
};
} // end detail
THRUST_NAMESPACE_END
#include <thrust/detail/temporary_array.inl>
|
