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Added simplistic makefile/project files for wxWinCE.
[wxWidgets.git] / include / wx / ptr_scpd.h
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: wx/ptr_scpd.h
3 // Purpose: scoped smart pointer class
4 // Author: Jesse Lovelace <jllovela@eos.ncsu.edu>
5 // Modified by:
6 // Created: 06/01/02
7 // RCS-ID: $Id$
8 // Copyright: (c) Jesse Lovelace and original Boost authors (see below)
9 // Licence: wxWindows license
10 /////////////////////////////////////////////////////////////////////////////
11
12 // This class closely follows the implementation of the boost
13 // library scoped_ptr and is an adaption for c++ macro's in
14 // the wxWindows project. The original authors of the boost
15 // scoped_ptr are given below with their respective copyrights.
16
17 // (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
18 // Copyright (c) 2001, 2002 Peter Dimov
19 //
20 // Permission to copy, use, modify, sell and distribute this software
21 // is granted provided this copyright notice appears in all copies.
22 // This software is provided "as is" without express or implied
23 // warranty, and with no claim as to its suitability for any purpose.
24 //
25 // See http://www.boost.org/libs/smart_ptr/scoped_ptr.htm for documentation.
26 //
27
28 #ifndef __WX_SCOPED_POINTER__
29 #define __WX_SCOPED_POINTER__
30
31 #include "wx/defs.h"
32
33 /* checked deleters are used to make sure that the
34 type being deleted is really a complete type.
35 - Jesse Lovelace <jllovela@eos.ncsu.edu>
36 */
37
38 #define wxCHECKED_DELETE(ptr) \
39 if (true) { \
40 typedef char complete[sizeof(*ptr)]; \
41 delete ptr; \
42 }
43
44 #define wxCHECKED_DELETE_ARRAY(ptr) \
45 if (true) { \
46 typedef char complete[sizeof(*ptr)]; \
47 delete [] ptr; \
48 }
49
50 /* These scoped pointers are *not* assignable and cannot be used
51 within a container. Look for wxDECLARE_SHARED_PTR for this
52 functionality.
53
54 In addition, the type being used *must* be complete at the time
55 that wxDEFINE_SCOPED_* is called or a compiler error will result.
56 This is because the class checks for the completeness of the type
57 being used.
58 */
59
60
61 #define wxDECLARE_SCOPED_PTR(T, name) \
62 class name \
63 { \
64 private: \
65 T * m_ptr; \
66 \
67 name(name const &); \
68 name & operator=(name const &); \
69 \
70 public: \
71 wxEXPLICIT name(T * ptr = NULL) \
72 : m_ptr(ptr) { } \
73 \
74 ~name(); \
75 \
76 void reset(T * ptr = NULL) \
77 { \
78 if (m_ptr != ptr) \
79 { \
80 delete m_ptr; \
81 m_ptr = ptr; \
82 } \
83 } \
84 \
85 T & operator*() const \
86 { \
87 wxASSERT(m_ptr != NULL); \
88 return *m_ptr; \
89 } \
90 \
91 T * operator->() const \
92 { \
93 wxASSERT(m_ptr != NULL); \
94 return m_ptr; \
95 } \
96 \
97 T * get() const \
98 { \
99 return m_ptr; \
100 } \
101 \
102 void swap(name & ot) \
103 { \
104 T * tmp = ot.m_ptr; \
105 ot.m_ptr = m_ptr; \
106 m_ptr = tmp; \
107 } \
108 };
109
110 #define wxDEFINE_SCOPED_PTR(T, name)\
111 name::~name() \
112 { \
113 wxCHECKED_DELETE(m_ptr) \
114 }
115
116 #define wxDECLARE_SCOPED_ARRAY(T, name)\
117 class name \
118 { \
119 private: \
120 T * m_ptr; \
121 name(name const &); \
122 name & operator=(name const &); \
123 \
124 public: \
125 wxEXPLICIT name(T * p = NULL) : m_ptr(p) \
126 {} \
127 \
128 ~name(); \
129 void reset(T * p = NULL); \
130 \
131 T & operator[](long int i) const\
132 { \
133 wxASSERT(m_ptr != NULL); \
134 wxASSERT(i >= 0); \
135 return m_ptr[i]; \
136 } \
137 \
138 T * get() const \
139 { \
140 return m_ptr; \
141 } \
142 \
143 void swap(name & ot) \
144 { \
145 T * tmp = ot.m_ptr; \
146 ot.m_ptr = m_ptr; \
147 m_ptr = tmp; \
148 } \
149 };
150
151 #define wxDEFINE_SCOPED_ARRAY(T, name) \
152 name::~name() \
153 { \
154 wxCHECKED_DELETE_ARRAY(m_ptr) \
155 } \
156 void name::reset(T * p){ \
157 if (m_ptr != p) \
158 { \
159 wxCHECKED_DELETE_ARRAY(m_ptr); \
160 m_ptr = p; \
161 } \
162 }
163
164 #endif