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1 | // |
2 | // Copyright (c) 2010 Artyom Beilis (Tonkikh) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See | |
5 | // accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | #ifndef BOOST_LOCALE_HOLD_PTR_H | |
9 | #define BOOST_LOCALE_HOLD_PTR_H | |
10 | ||
11 | namespace boost { | |
12 | namespace locale { | |
13 | /// | |
14 | /// \brief a smart pointer similar to std::auto_ptr but it is non-copyable and the | |
15 | /// underlying object has the same constness as the pointer itself (unlike an ordinary pointer). | |
16 | /// | |
17 | template<typename T> | |
18 | class hold_ptr { | |
19 | hold_ptr(hold_ptr const &other); // non copyable | |
20 | hold_ptr const &operator=(hold_ptr const &other); // non assignable | |
21 | public: | |
22 | /// | |
23 | /// Create new empty pointer | |
24 | /// | |
25 | hold_ptr() : ptr_(0) {} | |
26 | /// | |
27 | /// Create a pointer that holds \a v, ownership is transferred to smart pointer | |
28 | /// | |
29 | explicit hold_ptr(T *v) : ptr_(v) {} | |
30 | ||
31 | /// | |
32 | /// Destroy smart pointer and the object it owns. | |
33 | /// | |
34 | ~hold_ptr() | |
35 | { | |
36 | delete ptr_; | |
37 | } | |
38 | ||
39 | /// | |
40 | /// Get a const pointer to the object | |
41 | /// | |
42 | T const *get() const { return ptr_; } | |
43 | /// | |
44 | /// Get a mutable pointer to the object | |
45 | /// | |
46 | T *get() { return ptr_; } | |
47 | ||
48 | /// | |
49 | /// Get a const reference to the object | |
50 | /// | |
51 | T const &operator *() const { return *ptr_; } | |
52 | /// | |
53 | /// Get a mutable reference to the object | |
54 | /// | |
55 | T &operator *() { return *ptr_; } | |
56 | /// | |
57 | /// Get a const pointer to the object | |
58 | /// | |
59 | T const *operator->() const { return ptr_; } | |
60 | /// | |
61 | /// Get a mutable pointer to the object | |
62 | /// | |
63 | T *operator->() { return ptr_; } | |
64 | ||
65 | /// | |
66 | /// Transfer an ownership on the pointer to user | |
67 | /// | |
68 | T *release() { T *tmp=ptr_; ptr_=0; return tmp; } | |
69 | ||
70 | /// | |
71 | /// Set new value to pointer, previous object is destroyed, ownership on new object is transferred | |
72 | /// | |
73 | void reset(T *p=0) | |
74 | { | |
75 | if(ptr_) delete ptr_; | |
76 | ptr_=p; | |
77 | } | |
78 | /// Swap two pointers | |
79 | void swap(hold_ptr &other) | |
80 | { | |
81 | T *tmp=other.ptr_; | |
82 | other.ptr_=ptr_; | |
83 | ptr_=tmp; | |
84 | } | |
85 | private: | |
86 | T *ptr_; | |
87 | }; | |
88 | ||
89 | } // locale | |
90 | } // boost | |
91 | ||
92 | #endif | |
93 | // vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 |