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authoralwin <alwin>2004-03-12 19:18:29 (UTC)
committer alwin <alwin>2004-03-12 19:18:29 (UTC)
commit874d5a34eca296263dcd1adf857aebe9981825a1 (patch) (unidiff)
treea7b60a4d2a4de379ee4370dada0a76a8b2b3b4ee
parent590587e74b908460a275b1f58654bcf4cce5d175 (diff)
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-rw-r--r--libopie2/opiecore/osmartpointer.h (renamed from libopie2/opiecore/osmart_pointer.h)27
1 files changed, 14 insertions, 13 deletions
diff --git a/libopie2/opiecore/osmart_pointer.h b/libopie2/opiecore/osmartpointer.h
index 2a2518f..9000e71 100644
--- a/libopie2/opiecore/osmart_pointer.h
+++ b/libopie2/opiecore/osmartpointer.h
@@ -1,144 +1,145 @@
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 _OSmartPointer_h
33#define _osmart_pointer_h 33#define _OSmartPointer_h
34 34
35/*! 35/*!
36 * \file osmart_pointer.h 36 * \file OSmartPointer.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
42namespace Opie { 42namespace Opie {
43 43
44//! simple reference counter class 44//! simple reference counter class
45class oref_count { 45class ORefCount {
46protected: 46protected:
47 //! reference count member 47 //! reference count member
48 long m_RefCount; 48 long m_RefCount;
49public: 49public:
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 ORefCount() : m_RefCount(0)
52 {} 52 {}
53 virtual ~oref_count() {} 53 virtual ~ORefCount() {}
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
67template<class T> class osmart_pointer { 67template<class T> class OSmartPointer {
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;
75public: 75public:
76 //! standart constructor 76 //! standart constructor
77 osmart_pointer() { ptr = NULL; } 77 OSmartPointer() { 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 ~OSmartPointer()
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 OSmartPointer(T* t) { if (ptr = t) ptr->Incr(); }
93 //! Pointer copy 93 //! Pointer copy
94 osmart_pointer(const osmart_pointer<T>& p) 94 OSmartPointer(const OSmartPointer<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 osmart_pointer<T>& p) 97 OSmartPointer<T>& operator= (const OSmartPointer<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 OSmartPointer<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
145