VTK
vtkSMPThreadLocalObject.h
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1 /*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: vtkSMPThreadLocalObject.h
5
6 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7 All rights reserved.
8 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9
10 This software is distributed WITHOUT ANY WARRANTY; without even
11 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12 PURPOSE. See the above copyright notice for more information.
13
14=========================================================================*/
77#ifndef vtkSMPThreadLocalObject_h
78#define vtkSMPThreadLocalObject_h
79
80#include "vtkSMPThreadLocal.h"
81
82template <typename T>
84{
85 typedef vtkSMPThreadLocal<T*> TLS;
86 typedef typename vtkSMPThreadLocal<T*>::iterator TLSIter;
87
88 // Hide the copy constructor for now and assignment
89 // operator for now.
91 void operator=(const vtkSMPThreadLocalObject&);
92
93public:
97 vtkSMPThreadLocalObject() : Internal(0), Exemplar(0)
98 {
99 }
100
101 vtkSMPThreadLocalObject(T* const& exemplar) : Internal(0), Exemplar(exemplar)
102 {
103 }
104
106 {
107 iterator iter = this->begin();
108 while (iter != this->end())
109 {
110 if (*iter)
111 {
112 (*iter)->Delete();
113 }
114 ++iter;
115 }
116 }
117
119
124 T*& Local()
125 {
126 T*& vtkobject = this->Internal.Local();
127 if (!vtkobject)
128 {
129 if (this->Exemplar)
130 {
131 vtkobject = this->Exemplar->NewInstance();
132 }
133 else
134 {
135 vtkobject = T::SafeDownCast(T::New());
136 }
137 }
138 return vtkobject;
139 }
141
145 size_t size() const
146 {
147 return this->Internal.size();
148 }
149
151
158 {
159 public:
161 {
162 ++this->Iter;
163 return *this;
164 }
166
168 {
169 iterator copy = *this;
170 ++this->Iter;
171 return copy;
172 }
173
174 bool operator==(const iterator& other)
175 {
176 return this->Iter == other.Iter;
177 }
178
179 bool operator!=(const iterator& other)
180 {
181 return this->Iter != other.Iter;
182 }
183
185 {
186 return *this->Iter;
187 }
188
190 {
191 return &*this->Iter;
192 }
193
194 private:
195 TLSIter Iter;
196
197 friend class vtkSMPThreadLocalObject<T>;
198 };
199
201 {
202 iterator iter;
203 iter.Iter = this->Internal.begin();
204 return iter;
205 };
206
208 {
209 iterator iter;
210 iter.Iter = this->Internal.end();
211 return iter;
212 }
213
214private:
215 TLS Internal;
216 T* Exemplar;
217};
218
219#endif
220// VTK-HeaderTest-Exclude: vtkSMPThreadLocalObject.h
Subset of the standard iterator API.
bool operator!=(const iterator &other)
bool operator==(const iterator &other)
Thread local storage for VTK objects.
size_t size() const
Return the number of thread local objects that have been initialized.
vtkSMPThreadLocalObject(T *const &exemplar)
T *& Local()
Returns an object local to the current thread.
vtkSMPThreadLocalObject()
Default constructor.