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
|
/*
* Copyright 2008-2020 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 thrust/system/cpp/memory.h
* \brief Managing memory associated with Thrust's TBB system.
*/
#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 <type_traits>
#include <thrust/system/cpp/detail/execution_policy.h>
#include <thrust/detail/pointer.h>
#include <thrust/detail/reference.h>
THRUST_NAMESPACE_BEGIN
namespace system { namespace cpp
{
/*! \p cpp::pointer stores a pointer to an object allocated in memory accessible
* by the \p cpp system. This type provides type safety when dispatching
* algorithms on ranges resident in \p cpp memory.
*
* \p cpp::pointer has pointer semantics: it may be dereferenced and
* manipulated with pointer arithmetic.
*
* \p cpp::pointer can be created with the function \p cpp::malloc, or by
* explicitly calling its constructor with a raw pointer.
*
* The raw pointer encapsulated by a \p cpp::pointer may be obtained by eiter its
* <tt>get</tt> member function or the \p raw_pointer_cast function.
*
* \note \p cpp::pointer is not a "smart" pointer; it is the programmer's
* responsibility to deallocate memory pointed to by \p cpp::pointer.
*
* \tparam T specifies the type of the pointee.
*
* \see cpp::malloc
* \see cpp::free
* \see raw_pointer_cast
*/
template <typename T>
using pointer = thrust::pointer<
T,
thrust::system::cpp::tag,
thrust::tagged_reference<T, thrust::system::cpp::tag>
>;
/*! \p cpp::universal_pointer stores a pointer to an object allocated in memory
* accessible by the \p cpp system and host systems.
*
* \p cpp::universal_pointer has pointer semantics: it may be dereferenced and
* manipulated with pointer arithmetic.
*
* \p cpp::universal_pointer can be created with \p cpp::universal_allocator
* or by explicitly calling its constructor with a raw pointer.
*
* The raw pointer encapsulated by a \p cpp::universal_pointer may be obtained
* by eiter its <tt>get</tt> member function or the \p raw_pointer_cast
* function.
*
* \note \p cpp::universal_pointer is not a "smart" pointer; it is the
* programmer's responsibility to deallocate memory pointed to by
* \p cpp::universal_pointer.
*
* \tparam T specifies the type of the pointee.
*
* \see cpp::universal_allocator
* \see raw_pointer_cast
*/
template <typename T>
using universal_pointer = thrust::pointer<
T,
thrust::system::cpp::tag,
typename std::add_lvalue_reference<T>::type
>;
/*! \p reference is a wrapped reference to an object stored in memory available
* to the \p cpp system. \p reference is the type of the result of
* dereferencing a \p cpp::pointer.
*
* \tparam T Specifies the type of the referenced object.
*/
template <typename T>
using reference = thrust::reference<T, thrust::system::cpp::tag>;
}} // namespace system::cpp
/*! \addtogroup system_backends Systems
* \ingroup system
* \{
*/
/*! \namespace thrust::cpp
* \brief \p thrust::cpp is a top-level alias for \p thrust::system::cpp. */
namespace cpp
{
using thrust::system::cpp::pointer;
using thrust::system::cpp::universal_pointer;
using thrust::system::cpp::reference;
} // namespace cpp
THRUST_NAMESPACE_END
|
