1 | /*
|
---|
2 | * TOPPERS/JSP Kernel
|
---|
3 | * Toyohashi Open Platform for Embedded Real-Time Systems/
|
---|
4 | * Just Standard Profile Kernel
|
---|
5 | *
|
---|
6 | * Copyright (C) 2003 by Embedded and Real-Time Systems Laboratory
|
---|
7 | * Toyohashi Univ. of Technology, JAPAN
|
---|
8 | *
|
---|
9 | * ä¸è¨èä½æ¨©è
|
---|
10 | ã¯ï¼ä»¥ä¸ã® (1)ã(4) ã®æ¡ä»¶ãï¼Free Software Foundation
|
---|
11 | * ã«ãã£ã¦å
|
---|
12 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
|
---|
13 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
|
---|
14 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
|
---|
15 | å¸ï¼ä»¥ä¸ï¼
|
---|
16 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
|
---|
17 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
|
---|
18 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
|
---|
19 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
|
---|
20 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
21 | * ç¨ã§ããå½¢ã§åé
|
---|
22 | å¸ããå ´åã«ã¯ï¼åé
|
---|
23 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
|
---|
24 | * è
|
---|
25 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
|
---|
26 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
27 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
28 | * ç¨ã§ããªãå½¢ã§åé
|
---|
29 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
|
---|
30 | * ã¨ï¼
|
---|
31 | * (a) åé
|
---|
32 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
|
---|
33 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
|
---|
34 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
35 | * (b) åé
|
---|
36 | å¸ã®å½¢æ
|
---|
37 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
|
---|
38 | * å ±åãããã¨ï¼
|
---|
39 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
|
---|
40 | * 害ãããï¼ä¸è¨èä½æ¨©è
|
---|
41 | ããã³TOPPERSããã¸ã§ã¯ããå
|
---|
42 | 責ãããã¨ï¼
|
---|
43 | *
|
---|
44 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
|
---|
45 | ã
|
---|
46 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
|
---|
47 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
|
---|
48 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
|
---|
49 | *
|
---|
50 | * @(#) $Id: singleton.h,v 1.12 2004/09/06 15:00:49 honda Exp $
|
---|
51 | */
|
---|
52 |
|
---|
53 | // $Header: /home/CVS/configurator/base/singleton.h,v 1.12 2004/09/06 15:00:49 honda Exp $
|
---|
54 |
|
---|
55 | #include "base/testsuite.h"
|
---|
56 |
|
---|
57 | #ifndef SINGLETON_H
|
---|
58 | #define SINGLETON_H
|
---|
59 |
|
---|
60 | #ifdef _MSC_VER
|
---|
61 | # pragma warning(disable:4290) //C++ ã®ä¾å¤ã®æå®ã¯ç¡è¦ããã¾ããé¢æ°ã __declspec(nothrow) ã§ãªããã¨ã®ã¿è¡¨ç¤ºããã¾ãã
|
---|
62 | # pragma warning(disable:4291) //åæåã³âããä¾å¤ãã¹ãâããã¨ã'new' æ¼ç®åã使ç¨ãã¦ããã¨ã¡ã¢ãªã解æ¾ãã¾ããã
|
---|
63 | # pragma warning(disable:4786) //ãããã°æ
|
---|
64 | å ±ã§èå¥åã 255 æåã«åãæ¨ã¦ããã¾ããã
|
---|
65 | #endif
|
---|
66 |
|
---|
67 | #include <new>
|
---|
68 | #include <stdexcept>
|
---|
69 | #include <cstdlib>
|
---|
70 |
|
---|
71 | /*
|
---|
72 | * ã·ã³ã°ã«ãã³ãã¿ã¼ã³ å®è£
|
---|
73 |
|
---|
74 | */
|
---|
75 |
|
---|
76 | //ã·ã³ã°ã«ãã³åºåºã¯ã©ã¹
|
---|
77 | // #gccãfriend class Singletonãé£ã£ã¦ãããªãã®ã§åºåºãä½ã
|
---|
78 | class SingletonBase {
|
---|
79 | public:
|
---|
80 | //ãã¹ãã©ã¯ã¿ã®ãã§ã¼ã³
|
---|
81 | struct chain {
|
---|
82 | struct chain * next;
|
---|
83 | void (*destructor)(void);
|
---|
84 | };
|
---|
85 |
|
---|
86 | //ã·ã³ã°ã«ãã³ã§ã¤ã³ã¹ã¿ã³ã¹ãçæãããã¨ã示ãããã®ã¯ã©ã¹
|
---|
87 | // ãã®ã¯ã©ã¹ã¯Singletonããããå®ä½åã§ããªãã®ã§ã
|
---|
88 | // ã»ãã®ã¯ã©ã¹ãããããå¼æ°ã«ãã¤ã³ã³ã¹ãã©ã¯ã¿ã使ç¨ãããã¨ã¯ã§ããªã
|
---|
89 | class SingletonConstructionLocker
|
---|
90 | {
|
---|
91 | friend class SingletonBase;
|
---|
92 | protected:
|
---|
93 | SingletonConstructionLocker() {}
|
---|
94 | };
|
---|
95 |
|
---|
96 | private:
|
---|
97 | static bool initialize; //åæåæ¸ã¿ã (atexitãå¼ãã ãã©ãã)
|
---|
98 | static bool is_valid; //çæã«å¤±æããã·ã³ã°ã«ãã³ã¬ãããã©ãã
|
---|
99 | static struct chain * top; //ãã¹ãã©ã¯ã¿ãã§ã¼ã³
|
---|
100 |
|
---|
101 | //ãã¹ãã©ã¯ã¿ã®èµ·å
|
---|
102 | static void final_release(void) throw()
|
---|
103 | {
|
---|
104 | //å
|
---|
105 | é ããåé¤ (å
|
---|
106 | å
|
---|
107 | ¥ãå¾åºã)
|
---|
108 | while(top != 0) {
|
---|
109 | struct chain * node = top;
|
---|
110 | top = node->next;
|
---|
111 |
|
---|
112 | (*node->destructor)();
|
---|
113 |
|
---|
114 | delete node;
|
---|
115 | }
|
---|
116 | }
|
---|
117 |
|
---|
118 | protected:
|
---|
119 | //ãã§ã¼ã³ã«ãã¹ãã©ã¯ã¿ã追å
|
---|
120 | static bool addDestructor(void (* destructor)(void)) throw()
|
---|
121 | {
|
---|
122 | bool result = false;
|
---|
123 | struct SingletonBase::chain * node = new(std::nothrow) struct SingletonBase::chain;
|
---|
124 | if(node != 0) {
|
---|
125 |
|
---|
126 | //æ°ããè¦ç´ ãå
|
---|
127 | é ã«è¿½å
|
---|
128 | node->next = top;
|
---|
129 | node->destructor = destructor;
|
---|
130 |
|
---|
131 | top = node;
|
---|
132 |
|
---|
133 | result = true;
|
---|
134 |
|
---|
135 | //è¦ç´ ç ´æ£ã®ããã«æå¾ã«ç ´æ£ã«ã¼ãã³ãèµ·åããã
|
---|
136 | if(!initialize) {
|
---|
137 | atexit(final_release);
|
---|
138 | initialize = true;
|
---|
139 | }
|
---|
140 | }
|
---|
141 | return result;
|
---|
142 | }
|
---|
143 |
|
---|
144 | //SingletonConstructionLockerãã¡ã¯ããª
|
---|
145 | inline static SingletonConstructionLocker getLocker(void)
|
---|
146 | { return SingletonConstructionLocker(); }
|
---|
147 |
|
---|
148 | public:
|
---|
149 | //çæã«å¤±æããã·ã³ã°ã«ãã³ããªããã¨ãåå¾
|
---|
150 | static bool isValid(void) throw()
|
---|
151 | { return is_valid; }
|
---|
152 |
|
---|
153 | #ifdef TESTSUITE
|
---|
154 | /*
|
---|
155 | * ã³ã³ããã¹ããã§ã¼ã³ (ãã¹ãç¨ã·ã³ã°ã«ãã³ã³ã³ããã¹ãéé¿ãã§ã¼ã³)
|
---|
156 | */
|
---|
157 | class ContextChain {
|
---|
158 | protected:
|
---|
159 | struct chain {
|
---|
160 | struct chain * next;
|
---|
161 | void * context;
|
---|
162 | void (*restore)(void * & context) throw();
|
---|
163 | void (*renew)(void) throw();
|
---|
164 | void (*clear)(void);
|
---|
165 | } * top;
|
---|
166 |
|
---|
167 | public:
|
---|
168 | ContextChain(void) throw() : top(0)
|
---|
169 | {}
|
---|
170 |
|
---|
171 | ~ContextChain(void) throw()
|
---|
172 | { restoreContext(); }
|
---|
173 |
|
---|
174 | /* ã³ã³ããã¹ãã®å¾©å¸° */
|
---|
175 | void restoreContext(void) throw()
|
---|
176 | {
|
---|
177 | while(top != 0) {
|
---|
178 | struct chain * node = top;
|
---|
179 | top = top->next;
|
---|
180 |
|
---|
181 | (*node->restore)(node->context);
|
---|
182 | delete node;
|
---|
183 | }
|
---|
184 | }
|
---|
185 |
|
---|
186 | /* å
|
---|
187 | ¨ã¦ã®ã¤ã³ã¹ã¿ã³ã¹ãåçæ */
|
---|
188 | void renewInstance(void) throw(std::bad_alloc)
|
---|
189 | {
|
---|
190 | struct chain * node = top;
|
---|
191 | while(node != 0) {
|
---|
192 | (*node->renew)();
|
---|
193 | node = node->next;
|
---|
194 | }
|
---|
195 | }
|
---|
196 |
|
---|
197 | /* å
|
---|
198 | ¨ã¦ã®ã¤ã³ã¹ã¿ã³ã¹ãç ´æ£ */
|
---|
199 | void clearInstance(void) throw(std::bad_alloc)
|
---|
200 | {
|
---|
201 | struct chain * node = top;
|
---|
202 | while(node != 0) {
|
---|
203 | (*node->clear)();
|
---|
204 | node = node->next;
|
---|
205 | }
|
---|
206 | }
|
---|
207 |
|
---|
208 | /* ã³ã³ããã¹ãã®éé¿ */
|
---|
209 | template<class T> void saveContext(void) throw(std::bad_alloc)
|
---|
210 | {
|
---|
211 | struct chain * node = new struct chain;
|
---|
212 |
|
---|
213 | node->next = top;
|
---|
214 | node->restore = reinterpret_cast<void(*)(void*&)>(Singleton<T>::restoreContext);
|
---|
215 | node->renew = Singleton<T>::renewInstance;
|
---|
216 | node->clear = Singleton<T>::clearInstance;
|
---|
217 |
|
---|
218 | Singleton<T>::saveContext(reinterpret_cast<Singleton<T>::Context &>(node->context));
|
---|
219 |
|
---|
220 | top = node;
|
---|
221 | }
|
---|
222 | };
|
---|
223 | #endif
|
---|
224 |
|
---|
225 |
|
---|
226 | TESTSUITE_PROTOTYPE(main)
|
---|
227 | };
|
---|
228 |
|
---|
229 |
|
---|
230 | template<class T>
|
---|
231 | class Singleton : SingletonBase
|
---|
232 | {
|
---|
233 | protected:
|
---|
234 | Singleton(void);
|
---|
235 | ~Singleton(void);
|
---|
236 |
|
---|
237 | static T * instance;
|
---|
238 |
|
---|
239 | //ãã¹ãã©ã¯ã¿
|
---|
240 | static void destructor(void) throw()
|
---|
241 | {
|
---|
242 | if(instance != 0) {
|
---|
243 | try{ delete instance; } catch(...) {}
|
---|
244 | instance = 0;
|
---|
245 | }
|
---|
246 | }
|
---|
247 |
|
---|
248 | //ã¤ã³ã¹ã¿ã³ã¹ã®çæ (ã¤ã³ã¹ã¿ã³ã¹çæ + ãã¹ãã©ã¯ã¿ç»é² + ã¨ã©ã¼å¦ç)
|
---|
249 | static T * createInstance(std::nothrow_t) throw()
|
---|
250 | {
|
---|
251 | T * instance = 0;
|
---|
252 | try {
|
---|
253 | instance = new(std::nothrow) T(getLocker());
|
---|
254 |
|
---|
255 | if(instance != 0) {
|
---|
256 | if(!addDestructor(destructor))
|
---|
257 | throw false; //catchç¯ãå®è¡ãããã
|
---|
258 | }
|
---|
259 | }
|
---|
260 | catch(...) {
|
---|
261 | if(instance != 0) {
|
---|
262 | try { delete instance; } catch(...) {}
|
---|
263 | instance = 0;
|
---|
264 | }
|
---|
265 | }
|
---|
266 | return instance;
|
---|
267 | }
|
---|
268 |
|
---|
269 | //ã¤ã³ã¹ã¿ã³ã¹çæ (bad_allocä¾å¤ãã¹ãã¼ããå®è£
|
---|
270 | )
|
---|
271 | static T * createInstance(void) throw(std::bad_alloc)
|
---|
272 | {
|
---|
273 | instance = createInstance(std::nothrow);
|
---|
274 | if(instance == 0)
|
---|
275 | throw std::bad_alloc();
|
---|
276 | return instance;
|
---|
277 | }
|
---|
278 |
|
---|
279 | public:
|
---|
280 | //ã¤ã³ã¹ã¿ã³ã¹ã®åå¾
|
---|
281 | inline static T * getInstance(void) throw(std::bad_alloc)
|
---|
282 | {
|
---|
283 | if(instance == 0)
|
---|
284 | instance = createInstance();
|
---|
285 | return instance;
|
---|
286 | }
|
---|
287 |
|
---|
288 | //ã¤ã³ã¹ã¿ã³ã¹ã®åå¾
|
---|
289 | inline static T * getInstance(std::nothrow_t) throw()
|
---|
290 | {
|
---|
291 | if(instance == 0)
|
---|
292 | instance = createInstance(std::nothrow);
|
---|
293 | return instance;
|
---|
294 | }
|
---|
295 |
|
---|
296 | #ifdef TESTSUITE /* ãã¹ãç¨ */
|
---|
297 |
|
---|
298 | typedef T * Context; //éé¿ç¨
|
---|
299 |
|
---|
300 | //æ°ããã¤ã³ã¹ã¿ã³ã¹ã®çæ
|
---|
301 | static void renewInstance(void) throw(std::bad_alloc)
|
---|
302 | {
|
---|
303 | destructor(); //ä»ã®ã¤ã³ã¹ã¿ã³ã¹ãç ´æ£
|
---|
304 | instance = new T(getLocker()); //æ°ããã¤ã³ã¹ã¿ã³ã¹ãçæ (ãã¹ãã©ã¯ã¿ãç»é²ããã¦ãã¾ãã®ã§createInstanceãå¼ãã§ã¯ãããªã)
|
---|
305 | }
|
---|
306 |
|
---|
307 | //ã¤ã³ã¹ã¿ã³ã¹ç ´æ£
|
---|
308 | static void clearInstance(void) throw()
|
---|
309 | { destructor(); }
|
---|
310 |
|
---|
311 | //ã³ã³ããã¹ãéé¿
|
---|
312 | static void saveContext(Context & context) throw()
|
---|
313 | {
|
---|
314 | context = instance;
|
---|
315 | instance = 0;
|
---|
316 | }
|
---|
317 |
|
---|
318 | //ã³ã³ããã¹ã復帰
|
---|
319 | static void restoreContext(Context & context) throw()
|
---|
320 | {
|
---|
321 | destructor(); //ä»ã®ã¤ã³ã¹ã¿ã³ã¹ãç ´æ£
|
---|
322 | instance = context; //éé¿ããã¤ã³ã¹ã¿ã³ã¹ã復帰
|
---|
323 | }
|
---|
324 |
|
---|
325 | #endif /* TESTSUITE */
|
---|
326 |
|
---|
327 | };
|
---|
328 |
|
---|
329 |
|
---|
330 |
|
---|
331 | //Singleton éçå¤æ°
|
---|
332 | template<class T> T * Singleton<T>::instance = 0;
|
---|
333 |
|
---|
334 | #define SINGLETON_CONSTRUCTOR(x) explicit x(const SingletonBase::SingletonConstructionLocker &)
|
---|
335 | #define SINGLETON_CONSTRUCTOR_(x) explicit x(const SingletonBase::SingletonConstructionLocker & _singleton)
|
---|
336 |
|
---|
337 | #define SINGLETON_WRAPPER(derived, base) class derived : public base { public: SINGLETON_CONSTRUCTOR_(derived) throw() : base(_singleton) {} };
|
---|
338 |
|
---|
339 | #endif /* SINGLETON_H */
|
---|
340 |
|
---|