1 mday 1.19 //%/-*-c++-*-////////////////////////////////////////////////////////////////////////////
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2 mike 1.2 //
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3 kumpf 1.18 // Copyright (c) 2000, 2001, 2002 BMC Software, Hewlett-Packard Company, IBM,
4 // The Open Group, Tivoli Systems
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5 mike 1.2 //
6 // Permission is hereby granted, free of charge, to any person obtaining a copy
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7 kumpf 1.18 // of this software and associated documentation files (the "Software"), to
8 // deal in the Software without restriction, including without limitation the
9 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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10 mike 1.2 // sell copies of the Software, and to permit persons to whom the Software is
11 // furnished to do so, subject to the following conditions:
12 //
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13 kumpf 1.18 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
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14 mike 1.2 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
15 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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16 kumpf 1.18 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
17 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
18 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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19 mike 1.2 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 //
22 //==============================================================================
23 //
24 // Author: Mike Day (mdday@us.ibm.com)
25 //
26 // Modified By: Markus Mueller
27 //
28 //%/////////////////////////////////////////////////////////////////////////////
29
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30 mday 1.26.2.1
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31 mike 1.2 #ifndef Pegasus_Thread_h
32 #define Pegasus_Thread_h
33 #include <Pegasus/Common/Config.h>
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34 mike 1.5 #include <Pegasus/Common/IPC.h>
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35 mday 1.26.2.1 #include <Pegasus/Common/Exception.h>
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36 mike 1.2 #include <Pegasus/Common/DQueue.h>
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37 kumpf 1.22 #include <Pegasus/Common/Linkage.h>
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38 mike 1.2
39 PEGASUS_NAMESPACE_BEGIN
40
41 class PEGASUS_COMMON_LINKAGE cleanup_handler
42 {
43
44 public:
45 cleanup_handler( void (*routine)(void *), void *arg ) : _routine(routine), _arg(arg) {}
46 ~cleanup_handler() {; }
47 inline Boolean operator==(const void *key) const
48 {
49 if(key == (void *)_routine)
50 return true;
51 return false;
52 }
53 inline Boolean operator ==(const cleanup_handler & b) const
54 {
55 return(operator==((const void *)b._routine));
56 }
57 private:
58 void execute(void) { _routine(_arg); }
59 mike 1.2 cleanup_handler();
60 void (*_routine)(void *);
61
62 void *_arg;
63 PEGASUS_CLEANUP_HANDLE _cleanup_buffer;
64 friend class DQueue<class cleanup_handler>;
65 friend class Thread;
66 };
67
68 ///////////////////////////////////////////////////////////////////////////////
69
70
71 class PEGASUS_COMMON_LINKAGE thread_data
72 {
73
74 public:
75 static void default_delete(void *data);
76
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77 kumpf 1.7 thread_data( const Sint8 *key ) : _delete_func(NULL) , _data(NULL), _size(0)
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78 mike 1.2 {
79 PEGASUS_ASSERT(key != NULL);
80 size_t keysize = strlen(key);
81 _key = new Sint8 [keysize + 1];
82 memcpy(_key, key, keysize);
83 _key[keysize] = 0x00;
84
85 }
86
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87 kumpf 1.7 thread_data(const Sint8 *key, size_t size) : _delete_func(default_delete), _size(size)
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88 mike 1.2 {
89 PEGASUS_ASSERT(key != NULL);
90 size_t keysize = strlen(key);
91 _key = new Sint8 [keysize + 1];
92 memcpy(_key, key, keysize);
93 _key[keysize] = 0x00;
94 _data = ::operator new(_size) ;
95
96 }
97
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98 kumpf 1.7 thread_data(const Sint8 *key, size_t size, void *data) : _delete_func(default_delete), _size(size)
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99 mike 1.2 {
100 PEGASUS_ASSERT(key != NULL);
101 PEGASUS_ASSERT(data != NULL);
102 size_t keysize = strlen(key);
103
104 _key = new Sint8[keysize + 1];
105 memcpy(_key, key, keysize);
106 _key[keysize] = 0x00;
107 _data = ::operator new(_size);
108 memcpy(_data, data, size);
109 }
110
111 ~thread_data()
112 {
113 if( _data != NULL)
114 if(_delete_func != NULL)
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115 sage 1.9 {
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116 mike 1.2 _delete_func( _data );
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117 sage 1.9 }
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118 mike 1.2 if( _key != NULL )
119 delete [] _key;
120 }
121
122 void put_data(void (*del)(void *), size_t size, void *data ) throw(NullPointer)
123 {
124 if(_data != NULL)
125 if(_delete_func != NULL)
126 _delete_func(_data);
127
128 _delete_func = del;
129 _data = data;
130 _size = size;
131 return ;
132 }
133
134 size_t get_size(void) { return _size; }
135
136 void get_data(void **data, size_t *size)
137 {
138 if(data == NULL || size == NULL)
139 mike 1.2 throw NullPointer();
140
141 *data = _data;
142 *size = _size;
143 return;
144
145 }
146
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147 kumpf 1.17 void copy_data(void **buf, size_t *size) throw(NullPointer)
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148 mike 1.2 {
149 if((buf == NULL) || (size == NULL))
150 throw NullPointer() ;
151 *buf = ::operator new(_size);
152 *size = _size;
153 memcpy(*buf, _data, _size);
154 return;
155 }
156
157 inline Boolean operator==(const void *key) const
158 {
159 if ( ! strcmp(_key, (Sint8 *)key))
160 return(true);
161 return(false);
162 }
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163 mday 1.8
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164 mike 1.2 inline Boolean operator==(const thread_data& b) const
165 {
166 return(operator==((const void *)b._key));
167 }
168
169 private:
170 void (*_delete_func) (void *data) ;
171 thread_data();
172 void *_data;
173 size_t _size;
174 Sint8 *_key;
175
176 friend class DQueue<thread_data>;
177 friend class Thread;
178 };
179
180
181 ///////////////////////////////////////////////////////////////////////////
182
183 class PEGASUS_COMMON_LINKAGE ThreadPool;
184
185 mike 1.2 class PEGASUS_COMMON_LINKAGE Thread
186 {
187
188 public:
189 Thread( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *start )(void *),
190 void *parameter, Boolean detached );
191
192 ~Thread();
193
194 void run(void);
195
196 // get the user parameter
197 inline void *get_parm(void) { return _thread_parm; }
198
199 // send the thread a signal -- may not be appropriate due to Windows
200 // void kill(int signum);
201
202 // cancellation must be deferred (not asynchronous)
203 // for user-level threads the thread itself can decide
204 // when it should die.
205 void cancel(void);
206 mike 1.2
207 // cancel if there is a pending cancellation request
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208 kumpf 1.25 void test_cancel(void);
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209 mike 1.2
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210 mday 1.3 Boolean is_cancelled(void);
211
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212 mike 1.2 // for user-level threads - put the calling thread
213 // to sleep and jump to the thread scheduler.
214 // platforms with preemptive scheduling and native threads
215 // can define this to be a no-op.
216 // platforms without preemptive scheduling like NetWare
217 // or gnu portable threads will have an existing
218 // routine that can be mapped to this method
219
220 void thread_switch(void);
221
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222 kumpf 1.11 #if defined(PEGASUS_PLATFORM_LINUX_IX86_GNU) || defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU)
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223 mike 1.2 // suspend this thread
224 void suspend(void) ;
225
226 // resume this thread
227 void resume(void) ;
228 #endif
229
230 static void sleep(Uint32 msec) ;
231
232 // block the calling thread until this thread terminates
233 void join( void );
234 void thread_init(void);
235
236 // thread routine needs to call this function when
237 // it is ready to exit
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238 kumpf 1.25 void exit_self(PEGASUS_THREAD_RETURN return_code) ;
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239 mike 1.2
240 // stack of functions to be called when thread terminates
241 // will be called last in first out (LIFO)
242 void cleanup_push( void (*routine) (void *), void *parm ) throw(IPCException);
243 void cleanup_pop(Boolean execute = true) throw(IPCException);
244
245 // create and initialize a tsd
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246 kumpf 1.7 inline void create_tsd(const Sint8 *key, int size, void *buffer) throw(IPCException)
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247 mike 1.2 {
248 thread_data *tsd = new thread_data(key, size, buffer);
249 try { _tsd.insert_first(tsd); }
250 catch(IPCException& e) { e = e; delete tsd; throw; }
251 }
252
253 // get the buffer associated with the key
254 // NOTE: this call leaves the tsd LOCKED !!!!
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255 kumpf 1.7 inline void *reference_tsd(const Sint8 *key) throw(IPCException)
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256 mike 1.2 {
257 _tsd.lock();
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258 kumpf 1.7 thread_data *tsd = _tsd.reference((const void *)key);
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259 mike 1.2 if(tsd != NULL)
260 return( (void *)(tsd->_data) );
261 else
262 return(NULL);
263 }
264
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265 kumpf 1.7 inline void *try_reference_tsd(const Sint8 *key) throw(IPCException)
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266 mike 1.2 {
267 _tsd.try_lock();
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268 kumpf 1.7 thread_data *tsd = _tsd.reference((const void *)key);
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269 mike 1.2 if(tsd != NULL)
270 return((void *)(tsd->_data) );
271 else
272 return(NULL);
273 }
274
275
276 // release the lock held on the tsd
277 // NOTE: assumes a corresponding and prior call to reference_tsd() !!!
278 inline void dereference_tsd(void) throw(IPCException)
279 {
280 _tsd.unlock();
281 }
282
283 // delete the tsd associated with the key
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284 kumpf 1.7 inline void delete_tsd(const Sint8 *key) throw(IPCException)
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285 mike 1.2 {
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286 kumpf 1.7 thread_data *tsd = _tsd.remove((const void *)key);
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287 mike 1.2 if(tsd != NULL)
288 delete tsd;
289 }
290
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291 kumpf 1.14 // Note: Caller must delete the thread_data object returned (if not null)
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292 kumpf 1.7 inline void *remove_tsd(const Sint8 *key) throw(IPCException)
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293 mike 1.2 {
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294 kumpf 1.7 return(_tsd.remove((const void *)key));
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295 mike 1.2 }
296
297 inline void empty_tsd(void) throw(IPCException)
298 {
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299 kumpf 1.15 thread_data* tsd;
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300 mday 1.16 while (0 != (tsd = _tsd.remove_first()))
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301 kumpf 1.15 {
302 delete tsd;
303 }
304 //_tsd.empty_list();
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305 mike 1.2 }
306
307 // create or re-initialize tsd associated with the key
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308 kumpf 1.14 // if the tsd already exists, delete the existing buffer
309 void put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value)
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310 mike 1.2 throw(IPCException)
311
312 {
313 PEGASUS_ASSERT(key != NULL);
314 thread_data *tsd ;
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315 kumpf 1.7 tsd = _tsd.remove((const void *)key); // may throw an IPC exception
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316 kumpf 1.14 delete tsd;
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317 mike 1.2 thread_data *ntsd = new thread_data(key);
318 ntsd->put_data(delete_func, size, value);
319 try { _tsd.insert_first(ntsd); }
320 catch(IPCException& e) { e = e; delete ntsd; throw; }
321 }
322 inline PEGASUS_THREAD_RETURN get_exit(void) { return _exit_code; }
323 inline PEGASUS_THREAD_TYPE self(void) {return pegasus_thread_self(); }
324
325 PEGASUS_THREAD_HANDLE getThreadHandle() {return _handle;}
326
327 inline Boolean operator==(const void *key) const
328 {
329 if ( (void *)this == key)
330 return(true);
331 return(false);
332 }
333 inline Boolean operator==(const Thread & b) const
334 {
335 return(operator==((const void *)&b ));
336 }
337
338 mike 1.2 void detach(void);
339
340 private:
341 Thread();
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342 kumpf 1.7 inline void create_tsd(const Sint8 *key ) throw(IPCException)
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343 mike 1.2 {
344 thread_data *tsd = new thread_data(key);
345 try { _tsd.insert_first(tsd); }
346 catch(IPCException& e) { e = e; delete tsd; throw; }
347 }
348 PEGASUS_THREAD_HANDLE _handle;
349 Boolean _is_detached;
350 Boolean _cancel_enabled;
351 Boolean _cancelled;
352
353 PEGASUS_SEM_HANDLE _suspend_count;
354
355 // always pass this * as the void * parameter to the thread
356 // store the user parameter in _thread_parm
357
358 PEGASUS_THREAD_RETURN ( PEGASUS_THREAD_CDECL *_start)(void *) ;
359 DQueue<class cleanup_handler> _cleanup;
360 DQueue<class thread_data> _tsd;
361
362 void *_thread_parm;
363 PEGASUS_THREAD_RETURN _exit_code;
364 mike 1.2 static Boolean _signals_blocked;
365 friend class ThreadPool;
366 } ;
367
368
369 class PEGASUS_COMMON_LINKAGE ThreadPool
370 {
371 public:
372
373 ThreadPool(Sint16 initial_size,
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374 kumpf 1.7 const Sint8 *key,
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375 mike 1.2 Sint16 min,
376 Sint16 max,
377 struct timeval & alloc_wait,
378 struct timeval & dealloc_wait,
379 struct timeval & deadlock_detect);
380
381 ~ThreadPool(void);
382
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383 mday 1.8 void allocate_and_awaken(void *parm,
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384 mday 1.10 PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *work)(void *),
385 Semaphore *blocking = 0)
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386 mday 1.8 throw(IPCException);
387
388
389 Uint32 kill_dead_threads( void )
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390 mike 1.2 throw(IPCException);
391
392 void get_key(Sint8 *buf, int bufsize);
393
394 inline Boolean operator==(const void *key) const
395 {
396 if ( ! strncmp( reinterpret_cast<Sint8 *>(const_cast<void *>(key)), _key, 16 ))
397 return(true);
398 return(false);
399 }
400 inline Boolean operator==(const ThreadPool & b) const
401 {
402 return(operator==((const void *) b._key ));
403 }
404
405 inline void set_min_threads(Sint16 min)
406 {
407 _min_threads = min;
408 }
409
410 inline Sint16 get_min_threads(void) const
411 mike 1.2 {
412 return _min_threads;
413 }
414
415 inline void set_max_threads(Sint16 max)
416 {
417 _max_threads = max;
418 }
419
420 inline Sint16 get_max_threads(void) const
421 {
422 return _max_threads;
423 }
424
425 inline void set_allocate_wait(const struct timeval & alloc_wait)
426 {
427 _allocate_wait.tv_sec = alloc_wait.tv_sec;
428 _allocate_wait.tv_usec = alloc_wait.tv_usec;
429 }
430
431 inline struct timeval *get_allocate_wait(struct timeval *buffer) const
432 mike 1.2 {
433 if(buffer == 0)
434 throw NullPointer();
435 buffer->tv_sec = _allocate_wait.tv_sec;
436 buffer->tv_usec = _allocate_wait.tv_usec;
437 return buffer;
438 }
439
440 inline void set_deallocate_wait(const struct timeval & dealloc_wait)
441 {
442 _deallocate_wait.tv_sec = dealloc_wait.tv_sec;
443 _deallocate_wait.tv_usec = dealloc_wait.tv_usec;
444 }
445
446 inline struct timeval *get_deallocate_wait(struct timeval *buffer) const
447 {
448 if(buffer == 0)
449 throw NullPointer();
450 buffer->tv_sec = _deallocate_wait.tv_sec;
451 buffer->tv_usec = _deallocate_wait.tv_usec;
452 return buffer;
453 mike 1.2 }
454
455 inline void set_deadlock_detect(const struct timeval & deadlock)
456 {
457 _deadlock_detect.tv_sec = deadlock.tv_sec;
458 _deadlock_detect.tv_usec = deadlock.tv_usec;
459 }
460
461 inline struct timeval * get_deadlock_detect(struct timeval *buffer) const
462 {
463 if(buffer == 0)
464 throw NullPointer();
465 buffer->tv_sec = _deadlock_detect.tv_sec;
466 buffer->tv_usec = _deadlock_detect.tv_usec;
467 return buffer;
468 }
469
470 inline Uint32 running_count(void)
471 {
472 return _running.count();
473 }
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474 mday 1.19
475 inline Uint32 pool_count(void)
476 {
477 return _pool.count();
478 }
479 inline Uint32 dead_count(void)
480 {
481 return _dead.count();
482 }
483
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484 mike 1.2
485 static Boolean check_time(struct timeval *start, struct timeval *interval);
486
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487 mday 1.21 Boolean operator ==(const ThreadPool & p)
488 {
489 return operator==((const void *)&p);
490 }
491
492 Boolean operator ==(const void *p)
493 {
494 if((void *)this == p)
495 return true;
496 return false;
497 }
498
499 static void kill_idle_threads(void);
500
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501 mike 1.2 private:
502 ThreadPool(void);
503 Sint16 _max_threads;
504 Sint16 _min_threads;
505 AtomicInt _current_threads;
506 struct timeval _allocate_wait;
507 struct timeval _deallocate_wait;
508 struct timeval _deadlock_detect;
509 static PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL _loop(void *);
510 Sint8 _key[17];
511 DQueue<Thread> _pool;
512 DQueue<Thread> _running;
513 DQueue<Thread> _dead;
514 AtomicInt _dying;
515 static void _sleep_sem_del(void *p);
516
517 void _check_deadlock(struct timeval *start) throw(Deadlock);
518 Boolean _check_deadlock_no_throw(struct timeval *start);
519 Boolean _check_dealloc(struct timeval *start);
520 Thread *_init_thread(void) throw(IPCException);
521 void _link_pool(Thread *th) throw(IPCException);
522 mike 1.2 static PEGASUS_THREAD_RETURN _undertaker(void *);
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523 mday 1.21 static DQueue<ThreadPool> _pools;
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524 mike 1.2 };
525
526
527
528
529 #if defined(PEGASUS_OS_TYPE_WINDOWS)
530 # include "ThreadWindows_inline.h"
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531 sage 1.6 #elif defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
532 # include "ThreadzOS_inline.h"
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533 mike 1.2 #elif defined(PEGASUS_OS_TYPE_UNIX)
534 # include "ThreadUnix_inline.h"
535 #endif
536
537 PEGASUS_NAMESPACE_END
538
539 #endif // Pegasus_Thread_h
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