Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | // Copyright (C) 1999-2005 Open Source Telecom Corporation. |
| 2 | // Copyright (C) 2006-2010 David Sugar, Tycho Softworks |
| 3 | // |
| 4 | // This program is free software; you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation; either version 2 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program; if not, write to the Free Software |
| 16 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | // |
| 18 | // As a special exception, you may use this file as part of a free software |
| 19 | // library without restriction. Specifically, if other files instantiate |
| 20 | // templates or use macros or inline functions from this file, or you compile |
| 21 | // this file and link it with other files to produce an executable, this |
| 22 | // file does not by itself cause the resulting executable to be covered by |
| 23 | // the GNU General Public License. This exception does not however |
| 24 | // invalidate any other reasons why the executable file might be covered by |
| 25 | // the GNU General Public License. |
| 26 | // |
| 27 | // This exception applies only to the code released under the name GNU |
| 28 | // Common C++. If you copy code from other releases into a copy of GNU |
| 29 | // Common C++, as the General Public License permits, the exception does |
| 30 | // not apply to the code that you add in this way. To avoid misleading |
| 31 | // anyone as to the status of such modified files, you must delete |
| 32 | // this exception notice from them. |
| 33 | // |
| 34 | // If you write modifications of your own for GNU Common C++, it is your choice |
| 35 | // whether to permit this exception to apply to your modifications. |
| 36 | // If you do not wish that, delete this exception notice. |
| 37 | // |
| 38 | |
| 39 | #include <cc++/config.h> |
| 40 | #include <cc++/export.h> |
| 41 | #include <cc++/exception.h> |
| 42 | #include <cc++/thread.h> |
| 43 | #include "private.h" |
| 44 | #include <cc++/slog.h> |
| 45 | #include <iostream> |
| 46 | #include <cerrno> |
| 47 | #include <cstdlib> |
| 48 | |
| 49 | #ifdef HAVE_GCC_CXX_BITS_ATOMIC |
| 50 | using namespace __gnu_cxx; |
| 51 | #endif |
| 52 | |
| 53 | #ifdef CCXX_NAMESPACES |
| 54 | namespace ost { |
| 55 | using namespace std; |
| 56 | #endif |
| 57 | |
| 58 | bool Mutex::_debug = false; |
| 59 | |
| 60 | ThreadLock::ThreadLock() |
| 61 | { |
| 62 | #ifdef HAVE_PTHREAD_RWLOCK |
| 63 | pthread_rwlockattr_t attr; |
| 64 | |
| 65 | pthread_rwlockattr_init(&attr); |
| 66 | if(pthread_rwlock_init(&_lock, &attr)) { |
| 67 | pthread_rwlockattr_destroy(&attr); |
| 68 | #ifdef CCXX_EXCEPTIONS |
| 69 | if(Thread::getException() == Thread::throwObject) |
| 70 | throw(this); |
| 71 | #ifdef COMMON_STD_EXCEPTION |
| 72 | else if(Thread::getException() == Thread::throwException) |
| 73 | throw(SyncException("Mutex constructor failure")); |
| 74 | #endif |
| 75 | #endif |
| 76 | } |
| 77 | else |
| 78 | pthread_rwlockattr_destroy(&attr); |
| 79 | #endif |
| 80 | } |
| 81 | |
| 82 | ThreadLock::~ThreadLock() |
| 83 | { |
| 84 | #ifdef HAVE_PTHREAD_RWLOCK |
| 85 | pthread_rwlock_destroy(&_lock); |
| 86 | #endif |
| 87 | } |
| 88 | |
| 89 | void ThreadLock::readLock(void) |
| 90 | { |
| 91 | #ifdef HAVE_PTHREAD_RWLOCK |
| 92 | pthread_rwlock_rdlock(&_lock); |
| 93 | #else |
| 94 | mutex.enterMutex(); |
| 95 | #endif |
| 96 | } |
| 97 | |
| 98 | void ThreadLock::writeLock(void) |
| 99 | { |
| 100 | #ifdef HAVE_PTHREAD_RWLOCK |
| 101 | pthread_rwlock_wrlock(&_lock); |
| 102 | #else |
| 103 | mutex.enterMutex(); |
| 104 | #endif |
| 105 | } |
| 106 | |
| 107 | void ThreadLock::unlock(void) |
| 108 | { |
| 109 | #ifdef HAVE_PTHREAD_RWLOCK |
| 110 | pthread_rwlock_unlock(&_lock); |
| 111 | #else |
| 112 | mutex.leaveMutex(); |
| 113 | #endif |
| 114 | } |
| 115 | |
| 116 | bool ThreadLock::tryReadLock(void) |
| 117 | { |
| 118 | #ifdef HAVE_PTHREAD_RWLOCK |
| 119 | if(pthread_rwlock_tryrdlock(&_lock)) |
| 120 | return false; |
| 121 | return true; |
| 122 | #else |
| 123 | return mutex.tryEnterMutex(); |
| 124 | #endif |
| 125 | } |
| 126 | |
| 127 | bool ThreadLock::tryWriteLock(void) |
| 128 | { |
| 129 | #ifdef HAVE_PTHREAD_RWLOCK |
| 130 | if(pthread_rwlock_trywrlock(&_lock)) |
| 131 | return false; |
| 132 | return true; |
| 133 | #else |
| 134 | return mutex.tryEnterMutex(); |
| 135 | #endif |
| 136 | } |
| 137 | |
| 138 | #ifndef WIN32 |
| 139 | Conditional::Conditional(const char *id) |
| 140 | { |
| 141 | pthread_mutexattr_t attr; |
| 142 | pthread_mutexattr_init(&attr); |
| 143 | pthread_mutex_init(&_mutex, &attr); |
| 144 | pthread_mutexattr_destroy(&attr); |
| 145 | if(pthread_cond_init(&_cond, NULL) && Thread::getException() == Thread::throwObject) |
| 146 | THROW(this); |
| 147 | } |
| 148 | |
| 149 | Conditional::~Conditional() |
| 150 | { |
| 151 | pthread_cond_destroy(&_cond); |
| 152 | pthread_mutex_destroy(&_mutex); |
| 153 | } |
| 154 | |
| 155 | bool Conditional::tryEnterMutex(void) |
| 156 | { |
| 157 | if(pthread_mutex_trylock(&_mutex) != 0) |
| 158 | return false; |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | void Conditional::enterMutex(void) |
| 163 | { |
| 164 | pthread_mutex_lock(&_mutex); |
| 165 | } |
| 166 | |
| 167 | void Conditional::leaveMutex(void) |
| 168 | { |
| 169 | pthread_mutex_unlock(&_mutex); |
| 170 | } |
| 171 | |
| 172 | void Conditional::signal(bool broadcast) |
| 173 | { |
| 174 | if(broadcast) |
| 175 | pthread_cond_broadcast(&_cond); |
| 176 | else |
| 177 | pthread_cond_signal(&_cond); |
| 178 | } |
| 179 | |
| 180 | bool Conditional::wait(timeout_t timeout, bool locked) |
| 181 | { |
| 182 | struct timespec ts; |
| 183 | int rc; |
| 184 | |
| 185 | if(!locked) |
| 186 | enterMutex(); |
| 187 | if(!timeout) { |
| 188 | pthread_cond_wait(&_cond, &_mutex); |
| 189 | if(!locked) |
| 190 | leaveMutex(); |
| 191 | return true; |
| 192 | } |
| 193 | getTimeout(&ts, timeout); |
| 194 | rc = pthread_cond_timedwait(&_cond, &_mutex, &ts); |
| 195 | if(!locked) |
| 196 | leaveMutex(); |
| 197 | if(rc == ETIMEDOUT) |
| 198 | return false; |
| 199 | return true; |
| 200 | } |
| 201 | |
| 202 | #endif |
| 203 | |
| 204 | #ifndef WIN32 |
| 205 | Mutex::Mutex(const char *name) |
| 206 | { |
| 207 | pthread_mutexattr_t _attr; |
| 208 | |
| 209 | pthread_mutexattr_init(&_attr); |
| 210 | #ifdef PTHREAD_MUTEXTYPE_RECURSIVE |
| 211 | pthread_mutexattr_settype(&_attr, PTHREAD_MUTEXTYPE_RECURSIVE); |
| 212 | #endif |
| 213 | pthread_mutex_init(&_mutex, &_attr); |
| 214 | pthread_mutexattr_destroy(&_attr); |
| 215 | |
| 216 | #ifndef PTHREAD_MUTEXTYPE_RECURSIVE |
| 217 | _level = 0; |
| 218 | _tid = NULL; |
| 219 | #endif |
| 220 | _name = name; |
| 221 | } |
| 222 | |
| 223 | Mutex::~Mutex() |
| 224 | { |
| 225 | pthread_mutex_destroy(&_mutex); |
| 226 | } |
| 227 | |
| 228 | #ifdef PTHREAD_MUTEXTYPE_RECURSIVE |
| 229 | |
| 230 | bool Mutex::tryEnterMutex(void) |
| 231 | { |
| 232 | return (pthread_mutex_trylock(&_mutex) == 0) ? true : false; |
| 233 | } |
| 234 | |
| 235 | void Mutex::enterMutex(void) |
| 236 | { |
| 237 | if(_debug && _name) |
| 238 | slog.debug() << Thread::get()->getName() |
| 239 | << ": entering " << _name << std::endl; |
| 240 | |
| 241 | pthread_mutex_lock(&_mutex); |
| 242 | } |
| 243 | |
| 244 | void Mutex::leaveMutex(void) |
| 245 | { |
| 246 | pthread_mutex_unlock(&_mutex); |
| 247 | if(_debug && _name) |
| 248 | slog.debug() << Thread::get()->getName() |
| 249 | << ": leaving" << _name << std::endl; |
| 250 | |
| 251 | } |
| 252 | |
| 253 | #else // !PTHREAD_MUTEXTYPE_RECURSIVE |
| 254 | |
| 255 | void Mutex::enterMutex(void) |
| 256 | { |
| 257 | if(_tid == Thread::get()) { |
| 258 | ++_level; |
| 259 | return; |
| 260 | } |
| 261 | if(_debug && _name) |
| 262 | std::cerr << Thread::get()->getName() << ": entering" << _name << std::endl; |
| 263 | |
| 264 | pthread_mutex_lock(&_mutex); |
| 265 | ++_level; |
| 266 | _tid = Thread::get(); |
| 267 | } |
| 268 | |
| 269 | void Mutex::leaveMutex(void) |
| 270 | { |
| 271 | if(_tid != Thread::get()) |
| 272 | return; |
| 273 | if(--_level > 0) |
| 274 | return; |
| 275 | _tid = NULL; |
| 276 | _level = 0; |
| 277 | pthread_mutex_unlock(&_mutex); |
| 278 | if(_debug && _name) |
| 279 | std::cerr << Thread::get()->getName() << ": leaving" << _name << std::endl; |
| 280 | } |
| 281 | |
| 282 | bool Mutex::tryEnterMutex(void) |
| 283 | { |
| 284 | if(_tid == Thread::get()) { |
| 285 | ++_level; |
| 286 | return true; |
| 287 | } |
| 288 | if ( pthread_mutex_trylock(&_mutex) != 0 ) |
| 289 | return false; |
| 290 | _tid = Thread::get(); |
| 291 | ++_level; |
| 292 | return true; |
| 293 | } |
| 294 | #endif |
| 295 | |
| 296 | #else // WIN32 |
| 297 | |
| 298 | Mutex::Mutex(const char *name) |
| 299 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 300 | :_mutex(0) |
| 301 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 302 | { |
| 303 | #ifdef MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 304 | #if _WIN32_WINNT >= 0x0403 |
| 305 | if(!InitializeCriticalSectionAndSpinCount(&_criticalSection, 4000)) { |
| 306 | THROW(this); |
| 307 | } |
| 308 | #elif _WIN32_WINNT >= 0x0400 |
| 309 | // can rise STATUS_NO_MEMORY exception in low memory situations. |
| 310 | InitializeCriticalSection(&_criticalSection); |
| 311 | #else |
| 312 | #error "Not supported Windows version" |
| 313 | #endif |
| 314 | #endif // MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 315 | |
| 316 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 317 | _mutex = ::CreateMutex(NULL,FALSE,NULL); |
| 318 | if(!_mutex) |
| 319 | THROW(this); |
| 320 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 321 | |
| 322 | |
| 323 | _name = name; |
| 324 | } |
| 325 | |
| 326 | void Mutex::enterMutex(void) |
| 327 | { |
| 328 | if(_debug && _name) |
| 329 | slog.debug() << Thread::get()->getName() |
| 330 | << ": entering " << _name << std::endl; |
| 331 | |
| 332 | #ifdef MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 333 | ::EnterCriticalSection(&_criticalSection); |
| 334 | #endif // MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 335 | |
| 336 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 337 | Thread::waitThread(_mutex, INFINITE); |
| 338 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 339 | |
| 340 | } |
| 341 | |
| 342 | bool Mutex::tryEnterMutex(void) |
| 343 | { |
| 344 | #ifdef MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 345 | return (::TryEnterCriticalSection(&_criticalSection) == TRUE); |
| 346 | #endif // MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 347 | |
| 348 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 349 | return (Thread::waitThread(_mutex, 0) == WAIT_OBJECT_0); |
| 350 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 351 | } |
| 352 | |
| 353 | Mutex::~Mutex() |
| 354 | { |
| 355 | #ifdef MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 356 | ::DeleteCriticalSection(&_criticalSection); |
| 357 | #endif // MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 358 | |
| 359 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 360 | ::CloseHandle(_mutex); |
| 361 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 362 | |
| 363 | } |
| 364 | |
| 365 | void Mutex::leaveMutex(void) |
| 366 | { |
| 367 | #ifdef MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 368 | ::LeaveCriticalSection(&_criticalSection); |
| 369 | #endif // MUTEX_UNDERGROUND_WIN32_CRITICALSECTION |
| 370 | |
| 371 | #ifdef MUTEX_UNDERGROUND_WIN32_MUTEX |
| 372 | if (!ReleaseMutex(_mutex)) |
| 373 | THROW(this); |
| 374 | #endif // MUTEX_UNDERGROUND_WIN32_MUTEX |
| 375 | |
| 376 | if(_debug && _name) |
| 377 | slog.debug() << Thread::get()->getName() |
| 378 | << ": leaving" << _name << std::endl; |
| 379 | } |
| 380 | #endif // WIN32 MUTEX |
| 381 | |
| 382 | #ifdef WIN32 |
| 383 | MutexCounter::MutexCounter(const char *id) : Mutex(id) |
| 384 | { |
| 385 | counter = 0; |
| 386 | }; |
| 387 | #endif |
| 388 | |
| 389 | MutexCounter::MutexCounter(int initial, const char *id) : Mutex(id) |
| 390 | { |
| 391 | counter = initial; |
| 392 | } |
| 393 | |
| 394 | int operator++(MutexCounter &mc) |
| 395 | { |
| 396 | int rtn; |
| 397 | |
| 398 | mc.enterMutex(); |
| 399 | rtn = mc.counter++; |
| 400 | mc.leaveMutex(); |
| 401 | return rtn; |
| 402 | } |
| 403 | |
| 404 | // ??? why cannot be < 0 ??? |
| 405 | int operator--(MutexCounter &mc) |
| 406 | { |
| 407 | int rtn = 0; |
| 408 | |
| 409 | mc.enterMutex(); |
| 410 | if(mc.counter) { |
| 411 | rtn = --mc.counter; |
| 412 | if(!rtn) { |
| 413 | mc.leaveMutex(); |
| 414 | THROW(mc); |
| 415 | } |
| 416 | } |
| 417 | mc.leaveMutex(); |
| 418 | return rtn; |
| 419 | } |
| 420 | |
| 421 | #ifndef CCXX_USE_WIN32_ATOMIC |
| 422 | #ifdef HAVE_ATOMIC |
| 423 | AtomicCounter::AtomicCounter() |
| 424 | { |
| 425 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 426 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 427 | counter = 0; |
| 428 | #else |
| 429 | atomic.counter = 0; |
| 430 | #endif |
| 431 | } |
| 432 | |
| 433 | AtomicCounter::AtomicCounter(int value) |
| 434 | { |
| 435 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 436 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 437 | counter = 0; |
| 438 | #else |
| 439 | atomic.counter = value; |
| 440 | #endif |
| 441 | } |
| 442 | |
| 443 | AtomicCounter::~AtomicCounter() {}; |
| 444 | |
| 445 | int AtomicCounter::operator++(void) |
| 446 | { |
| 447 | #ifdef HAVE_ATOMIC_AIX |
| 448 | return fetch_and_add((atomic_p)&counter, 1); |
| 449 | #elif defined(HAVE_GCC_BITS_ATOMIC) || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 450 | // Modified by JCE from 2v1.3.8 source, 30/Mar/2005 |
| 451 | // BUG FIX: __exchange_and_add() does not seem to return updated <counter> |
| 452 | __exchange_and_add(&counter, 1); |
| 453 | return counter; |
| 454 | // end modification by JCE |
| 455 | #else |
| 456 | atomic_inc(&atomic); |
| 457 | return atomic_read(&atomic); |
| 458 | #endif |
| 459 | } |
| 460 | |
| 461 | int AtomicCounter::operator--(void) |
| 462 | { |
| 463 | #ifdef HAVE_ATOMIC_AIX |
| 464 | return fetch_and_add((atomic_p)&counter, -1); |
| 465 | #elif defined(HAVE_GCC_BITS_ATOMIC) || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 466 | // Modified by JCE from 2v1.3.8 source, 30/Mar/2005 |
| 467 | // BUG FIX: __exchange_and_add() does not seem to return updated <counter> |
| 468 | __exchange_and_add(&counter, -1); |
| 469 | return counter; |
| 470 | // end modification by JCE |
| 471 | #else |
| 472 | int chk = atomic_dec_and_test(&atomic); |
| 473 | if(chk) |
| 474 | return 0; |
| 475 | chk = atomic_read(&atomic); |
| 476 | if(!chk) |
| 477 | ++chk; |
| 478 | return chk; |
| 479 | #endif |
| 480 | } |
| 481 | |
| 482 | int AtomicCounter::operator+=(int change) |
| 483 | { |
| 484 | #ifdef HAVE_ATOMIC_AIX |
| 485 | return fetch_and_add((atomic_p)&counter, change); |
| 486 | #elif defined(HAVE_GCC_BITS_ATOMIC) || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 487 | // Modified by JCE from 2v1.3.8 source, 30/Mar/2005 |
| 488 | // BUG FIX: __exchange_and_add() does not seem to return updated <counter> |
| 489 | __exchange_and_add(&counter, change); |
| 490 | return counter; |
| 491 | // end modification by JCE |
| 492 | #else |
| 493 | atomic_add(change, &atomic); |
| 494 | return atomic_read(&atomic); |
| 495 | #endif |
| 496 | } |
| 497 | |
| 498 | int AtomicCounter::operator-=(int change) |
| 499 | { |
| 500 | #ifdef HAVE_ATOMIC_AIX |
| 501 | return fetch_and_add((atomic_p)&counter, -change); |
| 502 | #elif defined(HAVE_GCC_BITS_ATOMIC) || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 503 | // Modified by JCE from 2v1.3.8 source, 30/Mar/2005 |
| 504 | // BUG FIX: __exchange_and_add() does not seem to return updated <counter> |
| 505 | __exchange_and_add(&counter, -change); |
| 506 | return counter; |
| 507 | // end modification by JCE |
| 508 | #else |
| 509 | atomic_sub(change, &atomic); |
| 510 | return atomic_read(&atomic); |
| 511 | #endif |
| 512 | } |
| 513 | |
| 514 | int AtomicCounter::operator+(int change) |
| 515 | { |
| 516 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 517 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 518 | return counter + change; |
| 519 | #else |
| 520 | return atomic_read(&atomic) + change; |
| 521 | #endif |
| 522 | } |
| 523 | |
| 524 | int AtomicCounter::operator-(int change) |
| 525 | { |
| 526 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 527 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 528 | return counter - change; |
| 529 | #else |
| 530 | return atomic_read(&atomic) - change; |
| 531 | #endif |
| 532 | } |
| 533 | |
| 534 | int AtomicCounter::operator=(int value) |
| 535 | { |
| 536 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 537 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 538 | return counter = value; |
| 539 | #else |
| 540 | atomic_set(&atomic, value); |
| 541 | return atomic_read(&atomic); |
| 542 | #endif |
| 543 | } |
| 544 | |
| 545 | bool AtomicCounter::operator!(void) |
| 546 | { |
| 547 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 548 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 549 | int value = counter; |
| 550 | #else |
| 551 | int value = atomic_read(&atomic); |
| 552 | #endif |
| 553 | if(value) |
| 554 | return false; |
| 555 | return true; |
| 556 | } |
| 557 | |
| 558 | AtomicCounter::operator int() |
| 559 | { |
| 560 | #if defined(HAVE_ATOMIC_AIX) || defined(HAVE_GCC_BITS_ATOMIC) \ |
| 561 | || defined(HAVE_GCC_CXX_BITS_ATOMIC) |
| 562 | return counter; |
| 563 | #else |
| 564 | return atomic_read(&atomic); |
| 565 | #endif |
| 566 | } |
| 567 | |
| 568 | #else // !HAVE_ATOMIC |
| 569 | |
| 570 | AtomicCounter::AtomicCounter() |
| 571 | { |
| 572 | counter = 0; |
| 573 | |
| 574 | pthread_mutexattr_t _attr; |
| 575 | pthread_mutexattr_init(&_attr); |
| 576 | pthread_mutex_init(&_mutex, &_attr); |
| 577 | pthread_mutexattr_destroy(&_attr); |
| 578 | } |
| 579 | |
| 580 | AtomicCounter::AtomicCounter(int value) |
| 581 | { |
| 582 | counter = value; |
| 583 | |
| 584 | pthread_mutexattr_t _attr; |
| 585 | pthread_mutexattr_init(&_attr); |
| 586 | pthread_mutex_init(&_mutex, &_attr); |
| 587 | pthread_mutexattr_destroy(&_attr); |
| 588 | } |
| 589 | |
| 590 | AtomicCounter::~AtomicCounter() |
| 591 | { |
| 592 | pthread_mutex_destroy(&_mutex); |
| 593 | } |
| 594 | |
| 595 | int AtomicCounter::operator++(void) |
| 596 | { |
| 597 | int value; |
| 598 | |
| 599 | pthread_mutex_lock(&_mutex); |
| 600 | value = ++counter; |
| 601 | pthread_mutex_unlock(&_mutex); |
| 602 | return value; |
| 603 | } |
| 604 | |
| 605 | int AtomicCounter::operator--(void) |
| 606 | { |
| 607 | int value; |
| 608 | pthread_mutex_lock(&_mutex); |
| 609 | value = --counter; |
| 610 | pthread_mutex_unlock(&_mutex); |
| 611 | return value; |
| 612 | } |
| 613 | |
| 614 | int AtomicCounter::operator+=(int change) |
| 615 | { |
| 616 | int value; |
| 617 | pthread_mutex_lock(&_mutex); |
| 618 | counter += change; |
| 619 | value = counter; |
| 620 | pthread_mutex_unlock(&_mutex); |
| 621 | return value; |
| 622 | } |
| 623 | |
| 624 | int AtomicCounter::operator-=(int change) |
| 625 | { |
| 626 | int value; |
| 627 | pthread_mutex_lock(&_mutex); |
| 628 | counter -= change; |
| 629 | value = counter; |
| 630 | pthread_mutex_unlock(&_mutex); |
| 631 | return value; |
| 632 | } |
| 633 | |
| 634 | int AtomicCounter::operator+(int change) |
| 635 | { |
| 636 | int value; |
| 637 | pthread_mutex_lock(&_mutex); |
| 638 | value = counter + change; |
| 639 | pthread_mutex_unlock(&_mutex); |
| 640 | return value; |
| 641 | } |
| 642 | |
| 643 | int AtomicCounter::operator-(int change) |
| 644 | { |
| 645 | int value; |
| 646 | pthread_mutex_lock(&_mutex); |
| 647 | value = counter - change; |
| 648 | pthread_mutex_unlock(&_mutex); |
| 649 | return value; |
| 650 | } |
| 651 | |
| 652 | AtomicCounter::operator int() |
| 653 | { |
| 654 | int value; |
| 655 | pthread_mutex_lock(&_mutex); |
| 656 | value = counter; |
| 657 | pthread_mutex_unlock(&_mutex); |
| 658 | return value; |
| 659 | } |
| 660 | |
| 661 | int AtomicCounter::operator=(int value) |
| 662 | { |
| 663 | int ret; |
| 664 | pthread_mutex_lock(&_mutex); |
| 665 | ret = counter; |
| 666 | counter = value; |
| 667 | pthread_mutex_unlock(&_mutex); |
| 668 | return ret; |
| 669 | } |
| 670 | |
| 671 | bool AtomicCounter::operator!(void) |
| 672 | { |
| 673 | int value; |
| 674 | pthread_mutex_lock(&_mutex); |
| 675 | value = counter; |
| 676 | pthread_mutex_unlock(&_mutex); |
| 677 | if(value) |
| 678 | return false; |
| 679 | return true; |
| 680 | } |
| 681 | #endif // HAVE_ATOMIC |
| 682 | #else // WIN32 |
| 683 | int AtomicCounter::operator+=(int change) |
| 684 | { |
| 685 | // FIXME: enhance with InterlockExchangeAdd |
| 686 | while(--change>=0) |
| 687 | InterlockedIncrement(&atomic); |
| 688 | |
| 689 | return atomic; |
| 690 | } |
| 691 | |
| 692 | int AtomicCounter::operator-=(int change) |
| 693 | { |
| 694 | // FIXME: enhance with InterlockExchangeAdd |
| 695 | while(--change>=0) |
| 696 | InterlockedDecrement(&atomic); |
| 697 | |
| 698 | return atomic; |
| 699 | } |
| 700 | #endif // !WIN32 |
| 701 | |
| 702 | #ifdef CCXX_NAMESPACES |
| 703 | } |
| 704 | #endif |
| 705 | |
| 706 | /** EMACS ** |
| 707 | * Local variables: |
| 708 | * mode: c++ |
| 709 | * c-basic-offset: 4 |
| 710 | * End: |
| 711 | */ |
| 712 | |