-rw-r--r-- | libopie2/opiecore/osmart_pointer.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libopie2/opiecore/osmart_pointer.h b/libopie2/opiecore/osmart_pointer.h index a362a60..2a2518f 100644 --- a/libopie2/opiecore/osmart_pointer.h +++ b/libopie2/opiecore/osmart_pointer.h | |||
@@ -1,144 +1,144 @@ | |||
1 | // -*- Mode: C++; -*- | 1 | // -*- Mode: C++; -*- |
2 | /* | 2 | /* |
3 | This file is part of the Opie Project | 3 | This file is part of the Opie Project |
4 | Copyright (C) 2004 Rajko Albrecht <alwin@handhelds.org> | 4 | Copyright (C) 2004 Rajko Albrecht <alwin@handhelds.org> |
5 | Copyright (C) The Opie Team <opie-devel@handhelds.org> | 5 | Copyright (C) The Opie Team <opie-devel@handhelds.org> |
6 | =. | 6 | =. |
7 | .=l. | 7 | .=l. |
8 | .>+-= | 8 | .>+-= |
9 | _;:, .> :=|. This program is free software; you can | 9 | _;:, .> :=|. This program is free software; you can |
10 | .> <`_, > . <= redistribute it and/or modify it under | 10 | .> <`_, > . <= redistribute it and/or modify it under |
11 | :`=1 )Y*s>-.-- : the terms of the GNU Library General Public | 11 | :`=1 )Y*s>-.-- : the terms of the GNU Library General Public |
12 | .="- .-=="i, .._ License as published by the Free Software | 12 | .="- .-=="i, .._ License as published by the Free Software |
13 | - . .-<_> .<> Foundation; either version 2 of the License, | 13 | - . .-<_> .<> Foundation; either version 2 of the License, |
14 | ._= =} : or (at your option) any later version. | 14 | ._= =} : or (at your option) any later version. |
15 | .%`+i> _;_. | 15 | .%`+i> _;_. |
16 | .i_,=:_. -<s. This program is distributed in the hope that | 16 | .i_,=:_. -<s. This program is distributed in the hope that |
17 | + . -:. = it will be useful, but WITHOUT ANY WARRANTY; | 17 | + . -:. = it will be useful, but WITHOUT ANY WARRANTY; |
18 | : .. .:, . . . without even the implied warranty of | 18 | : .. .:, . . . without even the implied warranty of |
19 | =_ + =;=|` MERCHANTABILITY or FITNESS FOR A | 19 | =_ + =;=|` MERCHANTABILITY or FITNESS FOR A |
20 | _.=:. : :=>`: PARTICULAR PURPOSE. See the GNU | 20 | _.=:. : :=>`: PARTICULAR PURPOSE. See the GNU |
21 | ..}^=.= = ; Library General Public License for more | 21 | ..}^=.= = ; Library General Public License for more |
22 | ++= -. .` .: details. | 22 | ++= -. .` .: details. |
23 | : = ...= . :.=- | 23 | : = ...= . :.=- |
24 | -. .:....=;==+<; You should have received a copy of the GNU | 24 | -. .:....=;==+<; You should have received a copy of the GNU |
25 | -_. . . )=. = Library General Public License along with | 25 | -_. . . )=. = Library General Public License along with |
26 | -- :-=` this library; see the file COPYING.LIB. | 26 | -- :-=` this library; see the file COPYING.LIB. |
27 | If not, write to the Free Software Foundation, | 27 | If not, write to the Free Software Foundation, |
28 | Inc., 59 Temple Place - Suite 330, | 28 | Inc., 59 Temple Place - Suite 330, |
29 | Boston, MA 02111-1307, USA. | 29 | Boston, MA 02111-1307, USA. |
30 | */ | 30 | */ |
31 | 31 | ||
32 | #ifndef _osmart_pointer_h | 32 | #ifndef _osmart_pointer_h |
33 | #define _osmart_pointer_h | 33 | #define _osmart_pointer_h |
34 | 34 | ||
35 | /*! | 35 | /*! |
36 | * \file osmart_pointer.h | 36 | * \file osmart_pointer.h |
37 | * \brief smart pointer and reference counter | 37 | * \brief smart pointer and reference counter |
38 | * \author Rajko Albrecht | 38 | * \author Rajko Albrecht |
39 | * | 39 | * |
40 | */ | 40 | */ |
41 | 41 | ||
42 | namespace Opie { | 42 | namespace Opie { |
43 | 43 | ||
44 | //! simple reference counter class | 44 | //! simple reference counter class |
45 | class oref_count { | 45 | class oref_count { |
46 | protected: | 46 | protected: |
47 | //! reference count member | 47 | //! reference count member |
48 | long m_RefCount; | 48 | long m_RefCount; |
49 | public: | 49 | public: |
50 | //! first reference must be added after "new" via Pointer() | 50 | //! first reference must be added after "new" via Pointer() |
51 | oref_count() : m_RefCount(0) | 51 | oref_count() : m_RefCount(0) |
52 | {} | 52 | {} |
53 | virtual ~oref_count() {} | 53 | virtual ~oref_count() {} |
54 | //! add a reference | 54 | //! add a reference |
55 | void Incr() { | 55 | void Incr() { |
56 | ++m_RefCount; | 56 | ++m_RefCount; |
57 | } | 57 | } |
58 | //! delete a reference | 58 | //! delete a reference |
59 | void Decr() { | 59 | void Decr() { |
60 | --m_RefCount; | 60 | --m_RefCount; |
61 | } | 61 | } |
62 | //! is it referenced | 62 | //! is it referenced |
63 | bool Shared() { return (m_RefCount > 0); } | 63 | bool Shared() { return (m_RefCount > 0); } |
64 | }; | 64 | }; |
65 | 65 | ||
66 | //! reference counting wrapper class | 66 | //! reference counting wrapper class |
67 | template<class T> class osmart_pointer { | 67 | template<class T> class osmart_pointer { |
68 | //! pointer to object | 68 | //! pointer to object |
69 | /*! | 69 | /*! |
70 | * this object must contain Incr(), Decr() and Shared() | 70 | * this object must contain Incr(), Decr() and Shared() |
71 | * methode as public members. The best way is, that it will be a child | 71 | * methode as public members. The best way is, that it will be a child |
72 | * class of RefCount | 72 | * class of RefCount |
73 | */ | 73 | */ |
74 | T *ptr; | 74 | T *ptr; |
75 | public: | 75 | public: |
76 | //! standart constructor | 76 | //! standart constructor |
77 | osmart_pointer() { ptr = NULL; } | 77 | osmart_pointer() { ptr = NULL; } |
78 | //! standart destructor | 78 | //! standart destructor |
79 | /*! | 79 | /*! |
80 | * release the reference, if it were the last reference, destroys | 80 | * release the reference, if it were the last reference, destroys |
81 | * ptr | 81 | * ptr |
82 | */ | 82 | */ |
83 | ~osmart_pointer() | 83 | ~osmart_pointer() |
84 | { | 84 | { |
85 | if (ptr){ | 85 | if (ptr){ |
86 | ptr->Decr(); | 86 | ptr->Decr(); |
87 | if (!ptr->Shared()) | 87 | if (!ptr->Shared()) |
88 | delete ptr; | 88 | delete ptr; |
89 | } | 89 | } |
90 | } | 90 | } |
91 | //! construction | 91 | //! construction |
92 | osmart_pointer(T* t) { if (ptr = t) ptr->Incr(); } | 92 | osmart_pointer(T* t) { if (ptr = t) ptr->Incr(); } |
93 | //! Pointer copy | 93 | //! Pointer copy |
94 | osmart_pointer(const smart_pointer<T>& p) | 94 | osmart_pointer(const osmart_pointer<T>& p) |
95 | { if (ptr = p.ptr) ptr->Incr(); } | 95 | { if (ptr = p.ptr) ptr->Incr(); } |
96 | //! pointer copy by assignment | 96 | //! pointer copy by assignment |
97 | osmart_pointer<T>& operator= (const smart_pointer<T>& p) | 97 | osmart_pointer<T>& operator= (const osmart_pointer<T>& p) |
98 | { | 98 | { |
99 | // already same: nothing to do | 99 | // already same: nothing to do |
100 | if (ptr == p.ptr) return *this; | 100 | if (ptr == p.ptr) return *this; |
101 | // decouple reference | 101 | // decouple reference |
102 | if (ptr) { ptr->Decr(); if (!ptr->Shared()) delete ptr; } | 102 | if (ptr) { ptr->Decr(); if (!ptr->Shared()) delete ptr; } |
103 | // establish new reference | 103 | // establish new reference |
104 | if (ptr = p.ptr) ptr->Incr(); | 104 | if (ptr = p.ptr) ptr->Incr(); |
105 | return *this; | 105 | return *this; |
106 | } | 106 | } |
107 | osmart_pointer<T>& operator= (T*p) | 107 | osmart_pointer<T>& operator= (T*p) |
108 | { | 108 | { |
109 | if (ptr==p)return *this; | 109 | if (ptr==p)return *this; |
110 | if (ptr) { | 110 | if (ptr) { |
111 | ptr->Decr(); | 111 | ptr->Decr(); |
112 | if (!ptr->Shared()) delete ptr; | 112 | if (!ptr->Shared()) delete ptr; |
113 | } | 113 | } |
114 | if (ptr=p) ptr->Incr(); | 114 | if (ptr=p) ptr->Incr(); |
115 | return *this; | 115 | return *this; |
116 | } | 116 | } |
117 | 117 | ||
118 | //! cast to conventional pointer | 118 | //! cast to conventional pointer |
119 | operator T* () const { return ptr; } | 119 | operator T* () const { return ptr; } |
120 | 120 | ||
121 | //! deref: fails for NULL pointer | 121 | //! deref: fails for NULL pointer |
122 | T& operator* () {return *ptr; } | 122 | T& operator* () {return *ptr; } |
123 | //! deref: fails for NULL pointer | 123 | //! deref: fails for NULL pointer |
124 | const T& operator* ()const {return *ptr; } | 124 | const T& operator* ()const {return *ptr; } |
125 | 125 | ||
126 | //! deref with method call | 126 | //! deref with method call |
127 | T* operator-> () {return ptr; } | 127 | T* operator-> () {return ptr; } |
128 | //! deref with const method call | 128 | //! deref with const method call |
129 | const T* operator-> ()const {return ptr; } | 129 | const T* operator-> ()const {return ptr; } |
130 | 130 | ||
131 | //! supports "if (pointer)" | 131 | //! supports "if (pointer)" |
132 | operator bool () const { return (ptr != NULL); } | 132 | operator bool () const { return (ptr != NULL); } |
133 | //! "if (pointer)" as non const | 133 | //! "if (pointer)" as non const |
134 | operator bool () { return ptr != NULL;} | 134 | operator bool () { return ptr != NULL;} |
135 | 135 | ||
136 | //! support if (!pointer)" | 136 | //! support if (!pointer)" |
137 | bool operator! () const { return (ptr == NULL); } | 137 | bool operator! () const { return (ptr == NULL); } |
138 | //! support if (!pointer)" as non const | 138 | //! support if (!pointer)" as non const |
139 | bool operator! () { return (ptr == NULL); } | 139 | bool operator! () { return (ptr == NULL); } |
140 | }; | 140 | }; |
141 | 141 | ||
142 | } | 142 | } |
143 | 143 | ||
144 | #endif | 144 | #endif |