-
Notifications
You must be signed in to change notification settings - Fork 36
Expand file tree
/
Copy pathManager.h
More file actions
100 lines (74 loc) · 2.4 KB
/
Copy pathManager.h
File metadata and controls
100 lines (74 loc) · 2.4 KB
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
// -*- c++ -*-
/*
* Copyright (c) 2010-2012, Jim Bosch
* All rights reserved.
*
* ndarray is distributed under a simple BSD-like license;
* see the LICENSE file that should be present in the root
* of the source distribution, or alternately available at:
* https://github.com/ndarray/ndarray
*/
#ifndef NDARRAY_Manager_h_INCLUDED
#define NDARRAY_Manager_h_INCLUDED
/**
* @file ndarray/Manager.h
*
* @brief Definition of Manager, which manages the ownership of array data.
*/
#include "ndarray_fwd.h"
#include <boost/noncopyable.hpp>
#include <boost/intrusive_ptr.hpp>
#include <boost/scoped_array.hpp>
namespace ndarray {
class Manager : private boost::noncopyable {
public:
typedef boost::intrusive_ptr<Manager> Ptr;
friend inline void intrusive_ptr_add_ref(Manager const * manager) {
++manager->_rc;
}
friend inline void intrusive_ptr_release(Manager const * manager) {
if ((--manager->_rc)==0) delete manager;
}
int getRC() const { return _rc; }
virtual bool isUnique() const { return false; }
protected:
virtual ~Manager() {}
explicit Manager() : _rc(0) {}
private:
mutable int _rc;
};
template <typename T>
class SimpleManager : public Manager {
typedef typename boost::remove_const<T>::type U;
public:
static std::pair<Manager::Ptr,T*> allocate(Size size) {
boost::intrusive_ptr<SimpleManager> r(new SimpleManager(size));
return std::pair<Manager::Ptr,T*>(r, r->_p.get());
}
virtual bool isUnique() const { return true; }
private:
explicit SimpleManager(Size size) : _p() {
if (size > 0) _p.reset(new U[size]);
}
boost::scoped_array<U> _p;
};
template <typename T> Manager::Ptr makeManager(T const & owner);
template <typename U>
class ExternalManager : public Manager, private U {
public:
typedef U Owner;
template <typename T> friend Manager::Ptr makeManager(T const & owner);
Owner const & getOwner() const { return *static_cast<Owner const *>(this); }
private:
explicit ExternalManager(Owner const & owner) : Owner(owner) {}
};
template <typename T>
inline Manager::Ptr makeManager(T const & owner) {
return Manager::Ptr(new ExternalManager<T>(owner));
}
// A no-op overload for makeManager to avoid unnecessary levels of indirection.
inline Manager::Ptr makeManager(Manager::Ptr const & owner) {
return owner;
}
} // namespace ndarray
#endif // !NDARRAY_Manager_h_INCLUDED