Mercurial > projects > ldc
annotate lphobos/std/thread.d @ 883:b52d5de7783f
GC defines and linkage changes.
| author | Christian Kamm <kamm incasoftware de> |
|---|---|
| date | Thu, 08 Jan 2009 18:20:02 +0100 |
| parents | 373489eeaf90 |
| children |
| rev | line source |
|---|---|
| 131 | 1 // Written in the D programming language |
| 2 | |
| 3 /* | |
| 4 * Copyright (C) 2002-2007 by Digital Mars, www.digitalmars.com | |
| 5 * Written by Walter Bright | |
| 6 * | |
| 7 * This software is provided 'as-is', without any express or implied | |
| 8 * warranty. In no event will the authors be held liable for any damages | |
| 9 * arising from the use of this software. | |
| 10 * | |
| 11 * Permission is granted to anyone to use this software for any purpose, | |
| 12 * including commercial applications, and to alter it and redistribute it | |
| 13 * freely, subject to the following restrictions: | |
| 14 * | |
| 15 * o The origin of this software must not be misrepresented; you must not | |
| 16 * claim that you wrote the original software. If you use this software | |
| 17 * in a product, an acknowledgment in the product documentation would be | |
| 18 * appreciated but is not required. | |
| 19 * o Altered source versions must be plainly marked as such, and must not | |
| 20 * be misrepresented as being the original software. | |
| 21 * o This notice may not be removed or altered from any source | |
| 22 * distribution. | |
| 23 */ | |
| 24 | |
| 25 /************************** | |
| 26 * The thread module defines the class $(B Thread). | |
| 27 * | |
| 28 * $(B Thread) is the basis | |
| 29 * for writing multithreaded applications. Each thread | |
| 30 * has a unique instance of class $(B Thread) associated with it. | |
| 31 * It is important to use the $(B Thread) class to create and manage | |
| 32 * threads as the garbage collector needs to know about all the threads. | |
| 33 * Macros: | |
| 34 * WIKI=Phobos/StdThread | |
| 35 */ | |
| 36 | |
| 37 module std.thread; | |
| 38 | |
| 39 import std.c.stdio; | |
| 40 | |
| 41 //debug=thread; | |
| 42 | |
| 43 /* ================================ Win32 ================================= */ | |
| 44 | |
| 45 version (Win32) | |
| 46 { | |
| 47 | |
| 48 private import std.c.windows.windows; | |
| 49 | |
| 50 extern (Windows) alias uint (*stdfp)(void *); | |
| 51 | |
| 52 extern (C) | |
| 53 thread_hdl _beginthreadex(void* security, uint stack_size, | |
| 54 stdfp start_addr, void* arglist, uint initflag, | |
| 55 thread_id* thrdaddr); | |
| 56 | |
| 57 /** | |
| 58 * The type of the thread handle used by the operating system. | |
| 59 * For Windows, it is equivalent to a HANDLE from windows.d. | |
| 60 */ | |
| 61 alias HANDLE thread_hdl; | |
| 62 | |
| 63 alias uint thread_id; | |
| 64 | |
| 65 /** | |
| 66 * Thrown for errors. | |
| 67 */ | |
| 68 class ThreadError : Error | |
| 69 { | |
| 70 this(char[] s) | |
| 71 { | |
| 72 super("Thread error: " ~ s); | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 /** | |
| 77 * One of these is created for each thread. | |
| 78 */ | |
| 79 class Thread | |
| 80 { | |
| 81 /** | |
| 82 * Constructor used by classes derived from Thread that override main(). | |
| 83 * The optional stacksize parameter default value of 0 will cause threads | |
| 84 * to be created with the default size for the executable - Dave Fladebo | |
| 85 */ | |
| 86 this(size_t stacksize = 0) | |
| 87 { | |
| 88 this.stacksize = stacksize; | |
| 89 } | |
| 90 | |
| 91 /** | |
| 92 * Constructor used by classes derived from Thread that override run(). | |
| 93 */ | |
| 94 this(int (*fp)(void *), void *arg, size_t stacksize = 0) | |
| 95 { | |
| 96 this.fp = fp; | |
| 97 this.arg = arg; | |
| 98 this.stacksize = stacksize; | |
| 99 } | |
| 100 | |
| 101 /** | |
| 102 * Constructor used by classes derived from Thread that override run(). | |
| 103 */ | |
| 104 this(int delegate() dg, size_t stacksize = 0) | |
| 105 { | |
| 106 this.dg = dg; | |
| 107 this.stacksize = stacksize; | |
| 108 } | |
| 109 | |
| 110 /** | |
| 111 * Destructor | |
| 112 * | |
| 113 * If the thread hasn't been joined yet, detach it. | |
| 114 */ | |
| 115 ~this() | |
| 116 { | |
| 117 if (state != TS.FINISHED) | |
| 118 CloseHandle(hdl); | |
| 119 } | |
| 120 | |
| 121 /** | |
| 122 * The handle to this thread assigned by the operating system. This is set | |
| 123 * to thread_id.init if the thread hasn't been started yet. | |
| 124 */ | |
| 125 thread_hdl hdl; | |
| 126 | |
| 127 void* stackBottom; | |
| 128 | |
| 129 /** | |
| 130 * Create a new thread and start it running. The new thread initializes | |
| 131 * itself and then calls run(). start() can only be called once. | |
| 132 */ | |
| 133 void start() | |
| 134 { | |
| 135 if (state != TS.INITIAL) | |
| 136 error("already started"); | |
| 137 | |
| 138 synchronized (Thread.classinfo) | |
| 139 { | |
| 140 for (int i = 0; 1; i++) | |
| 141 { | |
| 142 if (i == allThreads.length) | |
| 143 error("too many threads"); | |
| 144 if (!allThreads[i]) | |
| 145 { allThreads[i] = this; | |
| 146 idx = i; | |
| 147 if (i >= allThreadsDim) | |
| 148 allThreadsDim = i + 1; | |
| 149 break; | |
| 150 } | |
| 151 } | |
| 152 nthreads++; | |
| 153 } | |
| 154 | |
| 155 state = TS.RUNNING; | |
| 156 hdl = _beginthreadex(null, cast(uint)stacksize, &threadstart, cast(void*)this, 0, &id); | |
| 157 if (hdl == cast(thread_hdl)0) | |
| 158 { state = TS.FINISHED; | |
| 159 synchronized (Thread.classinfo) allThreads[idx] = null; | |
| 160 idx = -1; | |
| 161 error("failed to start"); | |
| 162 } | |
| 163 } | |
| 164 | |
| 165 /** | |
| 166 * Entry point for a thread. If not overridden, it calls the function | |
| 167 * pointer fp and argument arg passed in the constructor, or the delegate | |
| 168 * dg. | |
| 169 * Returns: the thread exit code, which is normally 0. | |
| 170 */ | |
| 171 int run() | |
| 172 { | |
| 173 if (fp) | |
| 174 return fp(arg); | |
| 175 else if (dg) | |
| 176 return dg(); | |
| 177 assert(0); | |
| 178 } | |
| 179 | |
| 180 /***************************** | |
| 181 * Wait for this thread to terminate. | |
| 182 * Simply returns if thread has already terminated. | |
| 183 * Throws: $(B ThreadError) if the thread hasn't begun yet or | |
| 184 * is called on itself. | |
| 185 */ | |
| 186 void wait() | |
| 187 { | |
| 188 if (isSelf) | |
| 189 error("wait on self"); | |
| 190 if (state != TS.FINISHED) | |
| 191 { DWORD dw; | |
| 192 | |
| 193 dw = WaitForSingleObject(hdl, 0xFFFFFFFF); | |
| 194 state = TS.FINISHED; | |
| 195 CloseHandle(hdl); | |
| 196 hdl = null; | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 /****************************** | |
| 201 * Wait for this thread to terminate or until milliseconds time has | |
| 202 * elapsed, whichever occurs first. | |
| 203 * Simply returns if thread has already terminated. | |
| 204 * Throws: $(B ThreadError) if the thread hasn't begun yet or | |
| 205 * is called on itself. | |
| 206 */ | |
| 207 void wait(uint milliseconds) | |
| 208 { | |
| 209 if (isSelf) | |
| 210 error("wait on self"); | |
| 211 if (state != TS.FINISHED) | |
| 212 { DWORD dw; | |
| 213 | |
| 214 dw = WaitForSingleObject(hdl, milliseconds); | |
| 215 state = TS.FINISHED; | |
| 216 CloseHandle(hdl); | |
| 217 hdl = null; | |
| 218 } | |
| 219 } | |
| 220 | |
| 221 /** | |
| 222 * The state of a thread. | |
| 223 */ | |
| 224 enum TS | |
| 225 { | |
| 226 INITIAL, /// The thread hasn't been started yet. | |
| 227 RUNNING, /// The thread is running or paused. | |
| 228 TERMINATED, /// The thread has ended. | |
| 229 FINISHED /// The thread has been cleaned up | |
| 230 } | |
| 231 | |
| 232 /** | |
| 233 * Returns the state of a thread. | |
| 234 */ | |
| 235 TS getState() | |
| 236 { | |
| 237 return state; | |
| 238 } | |
| 239 | |
| 240 /** | |
| 241 * The priority of a thread. | |
| 242 */ | |
| 243 enum PRIORITY | |
| 244 { | |
| 245 INCREASE, /// Increase thread priority | |
| 246 DECREASE, /// Decrease thread priority | |
| 247 IDLE, /// Assign thread low priority | |
| 248 CRITICAL /// Assign thread high priority | |
| 249 } | |
| 250 | |
| 251 /** | |
| 252 * Adjust the priority of this thread. | |
| 253 * Throws: ThreadError if cannot set priority | |
| 254 */ | |
| 255 void setPriority(PRIORITY p) | |
| 256 { | |
| 257 int nPriority; | |
| 258 | |
| 259 switch (p) | |
| 260 { | |
| 261 case PRIORITY.INCREASE: | |
| 262 nPriority = THREAD_PRIORITY_ABOVE_NORMAL; | |
| 263 break; | |
| 264 case PRIORITY.DECREASE: | |
| 265 nPriority = THREAD_PRIORITY_BELOW_NORMAL; | |
| 266 break; | |
| 267 case PRIORITY.IDLE: | |
| 268 nPriority = THREAD_PRIORITY_IDLE; | |
| 269 break; | |
| 270 case PRIORITY.CRITICAL: | |
| 271 nPriority = THREAD_PRIORITY_TIME_CRITICAL; | |
| 272 break; | |
| 273 default: | |
| 274 assert(0); | |
| 275 } | |
| 276 | |
| 277 if (SetThreadPriority(hdl, nPriority) == THREAD_PRIORITY_ERROR_RETURN) | |
| 278 error("set priority"); | |
| 279 } | |
| 280 | |
| 281 /** | |
| 282 * Returns true if this thread is the current thread. | |
| 283 */ | |
| 284 bool isSelf() | |
| 285 { | |
| 286 //printf("id = %d, self = %d\n", id, pthread_self()); | |
| 287 return (id == GetCurrentThreadId()); | |
| 288 } | |
| 289 | |
| 290 /** | |
| 291 * Returns a reference to the Thread for the thread that called the | |
| 292 * function. | |
| 293 */ | |
| 294 static Thread getThis() | |
| 295 { | |
| 296 //printf("getThis(), allThreadsDim = %d\n", allThreadsDim); | |
| 297 thread_id id = GetCurrentThreadId(); | |
| 298 for (int i = 0; i < allThreadsDim; i++) | |
| 299 { | |
| 300 Thread t = allThreads[i]; | |
| 301 if (t && id == t.id) | |
| 302 { | |
| 303 return t; | |
| 304 } | |
| 305 } | |
| 306 printf("didn't find it\n"); | |
| 307 assert(0); | |
| 308 } | |
| 309 | |
| 310 /** | |
| 311 * Returns an array of all the threads currently running. | |
| 312 */ | |
| 313 static Thread[] getAll() | |
| 314 { | |
| 315 synchronized (Thread.classinfo) return allThreads[0 .. allThreadsDim]; | |
| 316 } | |
| 317 | |
| 318 /** | |
| 319 * Suspend execution of this thread. | |
| 320 */ | |
| 321 void pause() | |
| 322 { | |
| 323 if (state != TS.RUNNING || SuspendThread(hdl) == 0xFFFFFFFF) | |
| 324 error("cannot pause"); | |
| 325 } | |
| 326 | |
| 327 /** | |
| 328 * Resume execution of this thread. | |
| 329 */ | |
| 330 void resume() | |
| 331 { | |
| 332 if (state != TS.RUNNING || ResumeThread(hdl) == 0xFFFFFFFF) | |
| 333 error("cannot resume"); | |
| 334 } | |
| 335 | |
| 336 /** | |
| 337 * Suspend execution of all threads but this thread. | |
| 338 */ | |
| 339 static void pauseAll() | |
| 340 { | |
| 341 synchronized (Thread.classinfo) | |
| 342 { | |
| 343 if (nthreads > 1) | |
| 344 { | |
| 345 thread_id thisid = GetCurrentThreadId(); | |
| 346 | |
| 347 for (int i = 0; i < allThreadsDim; i++) | |
| 348 { | |
| 349 Thread t = allThreads[i]; | |
| 350 if (t && t.id != thisid && t.state == TS.RUNNING) | |
| 351 t.pause(); | |
| 352 } | |
| 353 } | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 /** | |
| 358 * Resume execution of all paused threads. | |
| 359 */ | |
| 360 static void resumeAll() | |
| 361 { | |
| 362 synchronized (Thread.classinfo) | |
| 363 { | |
| 364 if (nthreads > 1) | |
| 365 { | |
| 366 thread_id thisid = GetCurrentThreadId(); | |
| 367 | |
| 368 for (int i = 0; i < allThreadsDim; i++) | |
| 369 { | |
| 370 Thread t = allThreads[i]; | |
| 371 if (t && t.id != thisid && t.state == TS.RUNNING) | |
| 372 t.resume(); | |
| 373 } | |
| 374 } | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 /** | |
| 379 * Give up the remainder of this thread's time slice. | |
| 380 */ | |
| 381 static void yield() | |
| 382 { | |
| 383 Sleep(0); | |
| 384 } | |
| 385 | |
| 386 /** | |
| 387 * | |
| 388 */ | |
| 389 static uint nthreads = 1; | |
| 390 | |
| 391 private: | |
| 392 | |
| 393 static uint allThreadsDim; | |
| 394 static Thread[0x400] allThreads; // length matches value in C runtime | |
| 395 | |
| 396 TS state; | |
| 397 int idx = -1; // index into allThreads[] | |
| 398 thread_id id; | |
| 399 size_t stacksize = 0; | |
| 400 | |
| 401 int (*fp)(void *); | |
| 402 void *arg; | |
| 403 | |
| 404 int delegate() dg; | |
| 405 | |
| 406 void error(char[] msg) | |
| 407 { | |
| 408 throw new ThreadError(msg); | |
| 409 } | |
| 410 | |
| 411 | |
| 412 /* *********************************************** | |
| 413 * This is just a wrapper to interface between C rtl and Thread.run(). | |
| 414 */ | |
| 415 | |
| 416 extern (Windows) static uint threadstart(void *p) | |
| 417 { | |
| 418 Thread t = cast(Thread)p; | |
| 419 int result; | |
| 420 | |
| 421 debug (thread) printf("Starting thread %d\n", t.idx); | |
| 422 t.stackBottom = os_query_stackBottom(); | |
| 423 try | |
| 424 { | |
| 425 result = t.run(); | |
| 426 } | |
| 427 catch (Object o) | |
| 428 { | |
| 429 fprintf(stderr, "Error: %.*s\n", o.toString()); | |
| 430 result = 1; | |
| 431 } | |
| 432 | |
| 433 debug (thread) printf("Ending thread %d\n", t.idx); | |
| 434 t.state = TS.TERMINATED; | |
| 435 synchronized (Thread.classinfo) | |
| 436 { | |
| 437 allThreads[t.idx] = null; | |
| 438 t.idx = -1; | |
| 439 nthreads--; | |
| 440 } | |
| 441 return result; | |
| 442 } | |
| 443 | |
| 444 | |
| 445 /************************************** | |
| 446 * Create a Thread for global main(). | |
| 447 */ | |
| 448 | |
| 449 public static void thread_init() | |
| 450 { | |
| 451 Thread t = new Thread(); | |
| 452 | |
| 453 t.state = TS.RUNNING; | |
| 454 t.id = GetCurrentThreadId(); | |
| 455 t.hdl = Thread.getCurrentThreadHandle(); | |
| 456 t.stackBottom = os_query_stackBottom(); | |
| 457 | |
| 458 assert(!allThreads[0]); | |
| 459 allThreads[0] = t; | |
| 460 allThreadsDim = 1; | |
| 461 t.idx = 0; | |
| 462 } | |
| 463 | |
| 464 static ~this() | |
| 465 { | |
| 466 if (allThreadsDim) | |
| 467 { | |
| 468 CloseHandle(allThreads[0].hdl); | |
| 469 allThreads[0].hdl = GetCurrentThread(); | |
| 470 } | |
| 471 } | |
| 472 | |
| 473 /******************************************** | |
| 474 * Returns the handle of the current thread. | |
| 475 * This is needed because GetCurrentThread() always returns -2 which | |
| 476 * is a pseudo-handle representing the current thread. | |
| 477 * The returned thread handle is a windows resource and must be explicitly | |
| 478 * closed. | |
| 479 * Many thanks to Justin (jhenzie@mac.com) for figuring this out | |
| 480 * and providing the fix. | |
| 481 */ | |
| 482 static thread_hdl getCurrentThreadHandle() | |
| 483 { | |
| 484 thread_hdl currentThread = GetCurrentThread(); | |
| 485 thread_hdl actualThreadHandle; | |
| 486 | |
| 487 //thread_hdl currentProcess = cast(thread_hdl)-1; | |
| 488 thread_hdl currentProcess = GetCurrentProcess(); // http://www.digitalmars.com/drn-bin/wwwnews?D/21217 | |
| 489 | |
| 490 | |
| 491 uint access = cast(uint)0x00000002; | |
| 492 | |
| 493 DuplicateHandle(currentProcess, currentThread, currentProcess, | |
| 494 &actualThreadHandle, cast(uint)0, TRUE, access); | |
| 495 | |
| 496 return actualThreadHandle; | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 | |
| 501 /********************************************** | |
| 502 * Determine "bottom" of stack (actually the top on Win32 systems). | |
| 503 */ | |
| 504 | |
| 505 void *os_query_stackBottom() | |
| 506 { | |
| 507 asm | |
| 508 { | |
| 509 naked ; | |
| 510 mov EAX,FS:4 ; | |
| 511 ret ; | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 } | |
| 516 | |
| 517 /* ================================ linux ================================= */ | |
| 518 | |
| 519 version (linux) | |
| 520 { | |
| 521 | |
| 522 private import std.c.linux.linux; | |
| 523 private import std.c.linux.linuxextern; | |
| 524 private import llvm.intrinsic; | |
| 525 | |
| 526 alias uint pthread_t; | |
| 527 extern (C) alias void (*__sighandler_t)(int); | |
| 528 | |
| 529 struct sigset_t | |
| 530 { | |
| 531 uint __val[1024 / (8 * uint.sizeof)]; | |
| 532 } | |
| 533 | |
| 534 struct sigaction_t | |
| 535 { | |
| 536 __sighandler_t sa_handler; | |
| 537 sigset_t sa_mask; | |
| 538 int sa_flags; | |
| 539 void (*sa_restorer)(); | |
| 540 } | |
| 541 | |
| 542 struct pthread_attr_t | |
| 543 { | |
| 544 int __detachstate; | |
| 545 int __schedpolicy; | |
| 546 struct __schedparam | |
| 547 { | |
| 548 int __sched_priority; | |
| 549 } | |
| 550 int __inheritsched; | |
| 551 int __scope; | |
| 552 size_t __guardsize; | |
| 553 int __stackaddr_set; | |
| 554 void *__stackaddr; | |
| 555 size_t __stacksize; | |
| 556 } | |
| 557 | |
| 558 unittest | |
| 559 { | |
| 560 assert(sigset_t.sizeof == 128); | |
| 561 assert(sigaction_t.sizeof == 140); | |
| 562 assert(sem_t.sizeof == 16); | |
| 563 } | |
| 564 | |
| 565 extern (C) | |
| 566 { | |
| 567 int pthread_create(pthread_t*, void*, void* (*)(void*), void*); | |
| 568 int pthread_join(pthread_t, void**); | |
| 569 int pthread_kill(pthread_t, int); | |
| 570 pthread_t pthread_self(); | |
| 571 int pthread_equal(pthread_t, pthread_t); | |
| 572 int pthread_attr_init(pthread_attr_t*); | |
| 573 int pthread_attr_setstacksize(pthread_attr_t *, size_t); | |
| 574 int pthread_cancel(pthread_t); | |
| 575 int pthread_setcancelstate(int, int*); | |
| 576 int pthread_setcanceltype(int, int*); | |
| 577 int sched_yield(); | |
| 578 int sigfillset(sigset_t*); | |
| 579 int sigdelset(sigset_t*, int); | |
| 580 int sigaction(int, sigaction_t*, sigaction_t*); | |
| 581 int sigsuspend(sigset_t*); | |
| 582 | |
| 583 enum | |
| 584 { | |
| 585 PTHREAD_CANCEL_ENABLE, | |
| 586 PTHREAD_CANCEL_DISABLE | |
| 587 } | |
| 588 | |
| 589 enum | |
| 590 { | |
| 591 PTHREAD_CANCEL_DEFERRED, | |
| 592 PTHREAD_CANCEL_ASYNCHRONOUS | |
| 593 } | |
| 594 } | |
| 595 | |
| 596 class ThreadError : Error | |
| 597 { | |
| 598 this(char[] s) | |
| 599 { | |
| 600 super("Thread error: " ~ s); | |
| 601 } | |
| 602 } | |
| 603 | |
| 604 class Thread | |
| 605 { | |
| 606 // The optional stacksize parameter default value of 0 will cause threads | |
| 607 // to be created with the default pthread size - Dave Fladebo | |
| 608 this(size_t stacksize = 0) | |
| 609 { | |
| 610 init(stacksize); | |
| 611 } | |
| 612 | |
| 613 this(int (*fp)(void *), void *arg, size_t stacksize = 0) | |
| 614 { | |
| 615 this.fp = fp; | |
| 616 this.arg = arg; | |
| 617 init(stacksize); | |
| 618 } | |
| 619 | |
| 620 this(int delegate() dg, size_t stacksize = 0) | |
| 621 { | |
| 622 this.dg = dg; | |
| 623 init(stacksize); | |
| 624 } | |
| 625 | |
| 626 ~this() | |
| 627 { | |
| 628 pthread_cond_destroy(&waitCond); | |
| 629 pthread_mutex_destroy(&waitMtx); | |
| 630 if (state != TS.FINISHED) | |
| 631 pthread_detach(id); | |
| 632 } | |
| 633 | |
| 634 pthread_t id; | |
| 635 void* stackBottom; | |
| 636 void* stackTop; | |
| 637 | |
| 638 void start() | |
| 639 { | |
| 640 if (state != TS.INITIAL) | |
| 641 error("already started"); | |
| 642 | |
| 643 synchronized (Thread.classinfo) | |
| 644 { | |
| 645 for (int i = 0; 1; i++) | |
| 646 { | |
| 647 if (i == allThreads.length) | |
| 648 error("too many threads"); | |
| 649 if (!allThreads[i]) | |
| 650 { allThreads[i] = this; | |
| 651 idx = i; | |
| 652 if (i >= allThreadsDim) | |
| 653 allThreadsDim = i + 1; | |
| 654 break; | |
| 655 } | |
| 656 } | |
| 657 nthreads++; | |
| 658 } | |
| 659 | |
| 660 state = TS.RUNNING; | |
|
473
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
661 printf("creating thread x%x\n", this); |
| 131 | 662 //result = pthread_create(&id, null, &threadstart, this); |
| 663 // Create with thread attributes to allow non-default stack size - Dave Fladebo | |
| 664 int result = pthread_create(&id, &threadAttrs, &threadstart, cast(void*)this); | |
| 665 if (result) | |
| 666 { state = TS.FINISHED; | |
| 667 synchronized (Thread.classinfo) allThreads[idx] = null; | |
| 668 idx = -1; | |
| 669 error("failed to start"); // BUG: should report errno | |
| 670 } | |
|
473
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
671 printf("t = x%x, id = %d\n", this, id); |
| 131 | 672 } |
| 673 | |
| 674 int run() | |
| 675 { | |
| 676 if (fp) | |
| 677 return fp(arg); | |
| 678 else if (dg) | |
| 679 return dg(); | |
| 680 assert(0); | |
| 681 } | |
| 682 | |
| 683 void wait() | |
| 684 { | |
| 685 if (isSelf) | |
| 686 error("wait on self"); | |
| 687 | |
| 688 if (state != TS.FINISHED) | |
| 689 { | |
| 690 void *value; | |
| 691 | |
| 692 int result = pthread_join(id, &value); | |
| 693 state = TS.FINISHED; | |
| 694 if (result) | |
| 695 error("failed to wait"); | |
| 696 } | |
| 697 } | |
| 698 | |
| 699 void wait(uint milliseconds) | |
| 700 { | |
| 701 // Implemented for POSIX systems by Dave Fladebo | |
| 702 if (isSelf) | |
| 703 error("wait on self"); | |
| 704 if (state != TS.FINISHED) | |
| 705 { | |
| 706 timespec ts; | |
| 707 timeval tv; | |
| 708 | |
| 709 pthread_mutex_lock(&waitMtx); | |
| 710 gettimeofday(&tv, null); | |
| 711 ts.tv_sec = cast(__time_t)tv.tv_sec + cast(__time_t)(milliseconds / 1_000); | |
| 712 ts.tv_nsec = (tv.tv_usec * 1_000) + ((milliseconds % 1_000) * 1_000_000); | |
| 713 if (ts.tv_nsec > 1_000_000_000) | |
| 714 { | |
| 715 ts.tv_sec += 1; | |
| 716 ts.tv_nsec -= 1_000_000_000; | |
| 717 } | |
| 718 if (pthread_cond_timedwait(&waitCond, &waitMtx, &ts)) | |
| 719 { | |
| 720 int oldstate, oldtype; | |
| 721 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate); | |
| 722 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); | |
| 723 | |
| 724 if (pthread_cancel(id)) // thread was not completed in the timeout period, cancel it | |
| 725 { | |
| 726 pthread_mutex_unlock(&waitMtx); | |
| 727 error("cannot terminate thread via timed wait"); | |
| 728 } | |
| 729 | |
| 730 pthread_setcancelstate(oldstate, null); | |
| 731 pthread_setcanceltype(oldtype, null); | |
| 732 | |
| 733 state = TS.TERMINATED; | |
| 734 synchronized (Thread.classinfo) | |
| 735 { | |
| 736 allThreads[idx] = null; | |
| 737 idx = -1; | |
| 738 nthreads--; | |
| 739 } | |
| 740 | |
| 741 pthread_mutex_unlock(&waitMtx); | |
| 742 } | |
| 743 else | |
| 744 { | |
| 745 pthread_mutex_unlock(&waitMtx); | |
| 746 wait(); // condition has been signalled as complete (see threadstart()), terminate normally | |
| 747 } | |
| 748 } | |
| 749 } | |
| 750 | |
| 751 enum TS | |
| 752 { | |
| 753 INITIAL, // created | |
| 754 RUNNING, // running | |
| 755 TERMINATED, // execution finished | |
| 756 FINISHED // pthread_join()'ed | |
| 757 } | |
| 758 | |
| 759 TS getState() | |
| 760 { | |
| 761 return state; | |
| 762 } | |
| 763 | |
| 764 enum PRIORITY | |
| 765 { | |
| 766 INCREASE, | |
| 767 DECREASE, | |
| 768 IDLE, | |
| 769 CRITICAL | |
| 770 } | |
| 771 | |
| 772 void setPriority(PRIORITY p) | |
| 773 { | |
| 774 /+ not implemented | |
| 775 int nPriority; | |
| 776 | |
| 777 switch (p) | |
| 778 { | |
| 779 case PRIORITY.INCREASE: | |
| 780 nPriority = THREAD_PRIORITY_ABOVE_NORMAL; | |
| 781 break; | |
| 782 case PRIORITY.DECREASE: | |
| 783 nPriority = THREAD_PRIORITY_BELOW_NORMAL; | |
| 784 break; | |
| 785 case PRIORITY.IDLE: | |
| 786 nPriority = THREAD_PRIORITY_IDLE; | |
| 787 break; | |
| 788 case PRIORITY.CRITICAL: | |
| 789 nPriority = THREAD_PRIORITY_TIME_CRITICAL; | |
| 790 break; | |
| 791 } | |
| 792 | |
| 793 if (SetThreadPriority(hdl, nPriority) == THREAD_PRIORITY_ERROR_RETURN) | |
| 794 error("set priority"); | |
| 795 +/ | |
| 796 } | |
| 797 | |
| 798 int isSelf() | |
| 799 { | |
| 800 //printf("id = %d, self = %d\n", id, pthread_self()); | |
| 801 return pthread_equal(pthread_self(), id); | |
| 802 } | |
| 803 | |
| 804 static Thread getThis() | |
| 805 { | |
| 806 //printf("getThis(), allThreadsDim = %d\n", allThreadsDim); | |
| 807 pthread_t id = pthread_self(); | |
| 808 //printf("id = %d\n", id); | |
| 809 for (int i = 0; i < allThreadsDim; i++) | |
| 810 { | |
| 811 Thread t = allThreads[i]; | |
| 812 //printf("allThreads[%d] = x%x, id = %d\n", i, t, (t ? t.id : 0)); | |
| 813 if (t && pthread_equal(id, t.id)) | |
| 814 { | |
| 815 return t; | |
| 816 } | |
| 817 } | |
| 818 printf("didn't find it\n"); | |
| 819 assert(null); | |
| 820 } | |
| 821 | |
| 822 static Thread[] getAll() | |
| 823 { | |
| 824 synchronized (Thread.classinfo) return allThreads[0 .. allThreadsDim]; | |
| 825 } | |
| 826 | |
| 827 void pause() | |
| 828 { | |
| 829 if (state == TS.RUNNING) | |
| 830 { | |
| 831 if (pthread_kill(id, SIGUSR1)) | |
| 832 error("cannot pause"); | |
| 833 else | |
| 834 sem_wait(&flagSuspend); // wait for acknowledgement | |
| 835 } | |
| 836 else | |
| 837 error("cannot pause"); | |
| 838 } | |
| 839 | |
| 840 void resume() | |
| 841 { | |
| 842 if (state == TS.RUNNING) | |
| 843 { | |
| 844 if (pthread_kill(id, SIGUSR2)) | |
| 845 error("cannot resume"); | |
| 846 } | |
| 847 else | |
| 848 error("cannot resume"); | |
| 849 } | |
| 850 | |
| 851 static void pauseAll() | |
| 852 { | |
| 853 synchronized (Thread.classinfo) | |
| 854 { | |
| 855 if (nthreads > 1) | |
| 856 { | |
| 857 pthread_t thisid = pthread_self(); | |
| 858 int npause = 0; | |
| 859 | |
| 860 for (int i = 0; i < allThreadsDim; i++) | |
| 861 { | |
| 862 Thread t = allThreads[i]; | |
| 863 if (t && !pthread_equal(thisid, t.id) && t.state == TS.RUNNING) | |
| 864 { | |
| 865 if (pthread_kill(t.id, SIGUSR1)) | |
| 866 t.error("cannot pause"); | |
| 867 else | |
| 868 npause++; // count of paused threads | |
| 869 } | |
| 870 } | |
| 871 | |
| 872 // Wait for each paused thread to acknowledge | |
| 873 while (npause--) | |
| 874 { | |
| 875 sem_wait(&flagSuspend); | |
| 876 } | |
| 877 } | |
| 878 } | |
| 879 } | |
| 880 | |
| 881 static void resumeAll() | |
| 882 { | |
| 883 synchronized (Thread.classinfo) | |
| 884 { | |
| 885 if (nthreads > 1) | |
| 886 { | |
| 887 pthread_t thisid = pthread_self(); | |
| 888 | |
| 889 for (int i = 0; i < allThreadsDim; i++) | |
| 890 { | |
| 891 Thread t = allThreads[i]; | |
| 892 if (t && t.id != thisid && t.state == TS.RUNNING) | |
| 893 t.resume(); | |
| 894 } | |
| 895 } | |
| 896 } | |
| 897 } | |
| 898 | |
| 899 static void yield() | |
| 900 { | |
| 901 sched_yield(); | |
| 902 } | |
| 903 | |
| 904 static uint nthreads = 1; | |
| 905 | |
| 906 private: | |
| 907 | |
| 908 static uint allThreadsDim; | |
| 909 | |
| 910 // Set max to Windows equivalent for compatibility. | |
| 911 // pthread_create will fail gracefully if stack limit | |
| 912 // is reached prior to allThreads max. | |
| 913 static Thread[0x400] allThreads; | |
| 914 | |
| 915 static sem_t flagSuspend; | |
| 916 | |
| 917 TS state; | |
| 918 int idx = -1; // index into allThreads[] | |
| 919 int flags = 0; | |
| 920 | |
| 921 pthread_attr_t threadAttrs; | |
| 922 pthread_mutex_t waitMtx; | |
| 923 pthread_cond_t waitCond; | |
| 924 | |
| 925 int (*fp)(void *); | |
| 926 void *arg; | |
| 927 | |
| 928 int delegate() dg; | |
| 929 | |
| 930 void error(char[] msg) | |
| 931 { | |
| 932 throw new ThreadError(msg); | |
| 933 } | |
| 934 | |
| 935 void init(size_t stackSize) | |
| 936 { | |
| 937 // set to default values regardless | |
| 938 // passing this as the 2nd arg. for pthread_create() | |
| 939 // w/o setting an attribute is equivalent to passing null. | |
| 940 pthread_attr_init(&threadAttrs); | |
| 941 if (stackSize > 0) | |
| 942 { | |
| 943 if (pthread_attr_setstacksize(&threadAttrs,stackSize)) | |
| 944 error("cannot set stack size"); | |
| 945 } | |
| 946 | |
| 947 if (pthread_mutex_init(&waitMtx, null)) | |
| 948 error("cannot initialize wait mutex"); | |
| 949 | |
| 950 if (pthread_cond_init(&waitCond, null)) | |
| 951 error("cannot initialize wait condition"); | |
| 952 } | |
| 953 | |
| 954 /************************************************ | |
| 955 * This is just a wrapper to interface between C rtl and Thread.run(). | |
| 956 */ | |
| 957 | |
| 958 extern (C) static void *threadstart(void *p) | |
| 959 { | |
| 960 Thread t = cast(Thread)p; | |
| 961 int result; | |
| 962 | |
| 963 debug (thread) printf("Starting thread x%x (%d)\n", t, t.idx); | |
| 964 | |
| 965 // Need to set t.id here, because thread is off and running | |
| 966 // before pthread_create() sets it. | |
| 967 t.id = pthread_self(); | |
| 968 | |
| 969 t.stackBottom = getESP(); | |
| 970 try | |
| 971 { | |
| 972 if(t.state == TS.RUNNING) | |
| 973 pthread_cond_signal(&t.waitCond); // signal the wait condition (see the timed wait function) | |
| 974 result = t.run(); | |
| 975 } | |
| 976 catch (Object o) | |
| 977 { | |
| 978 fprintf(stderr, "Error: %.*s\n", o.toString()); | |
| 979 result = 1; | |
| 980 } | |
| 981 | |
| 982 debug (thread) printf("Ending thread %d\n", t.idx); | |
| 983 t.state = TS.TERMINATED; | |
| 984 synchronized (Thread.classinfo) | |
| 985 { | |
| 986 allThreads[t.idx] = null; | |
| 987 t.idx = -1; | |
| 988 nthreads--; | |
| 989 } | |
| 990 return cast(void*)result; | |
| 991 } | |
| 992 | |
| 993 | |
| 994 /************************************** | |
| 995 * Create a Thread for global main(). | |
| 996 */ | |
| 997 | |
| 998 public static void thread_init() | |
| 999 { | |
| 1000 Thread t = new Thread(); | |
| 1001 | |
| 1002 t.state = TS.RUNNING; | |
| 1003 t.id = pthread_self(); | |
| 1004 | |
| 1005 version (none) | |
| 1006 { | |
| 1007 // See discussion: http://autopackage.org/forums/viewtopic.php?t=22 | |
| 1008 static void** libc_stack_end; | |
| 1009 | |
| 1010 if (libc_stack_end == libc_stack_end.init) | |
| 1011 { | |
| 1012 void* handle = dlopen(null, RTLD_NOW); | |
| 1013 libc_stack_end = cast(void **)dlsym(handle, "__libc_stack_end"); | |
| 1014 dlclose(handle); | |
| 1015 } | |
| 1016 t.stackBottom = *libc_stack_end; | |
| 1017 } | |
| 1018 else | |
| 1019 { | |
| 1020 t.stackBottom = cast(void*)__libc_stack_end; | |
| 1021 } | |
| 1022 | |
| 1023 assert(!allThreads[0]); | |
| 1024 allThreads[0] = t; | |
| 1025 allThreadsDim = 1; | |
| 1026 t.idx = 0; | |
| 1027 | |
| 1028 /* Install signal handlers so we can suspend/resume threads | |
| 1029 */ | |
| 1030 | |
| 1031 int result; | |
| 1032 sigaction_t sigact; | |
| 1033 result = sigfillset(&sigact.sa_mask); | |
| 1034 if (result) | |
| 1035 goto Lfail; | |
| 1036 sigact.sa_handler = &pauseHandler; | |
| 1037 result = sigaction(SIGUSR1, &sigact, null); | |
| 1038 if (result) | |
| 1039 goto Lfail; | |
| 1040 sigact.sa_handler = &resumeHandler; | |
| 1041 result = sigaction(SIGUSR2, &sigact, null); | |
| 1042 if (result) | |
| 1043 goto Lfail; | |
| 1044 | |
| 1045 result = sem_init(&flagSuspend, 0, 0); | |
| 1046 if (result) | |
| 1047 goto Lfail; | |
| 1048 | |
| 1049 return; | |
| 1050 | |
| 1051 Lfail: | |
| 1052 t.error("cannot initialize threads"); | |
| 1053 } | |
| 1054 | |
| 1055 /********************************** | |
| 1056 * This gets called when a thread gets SIGUSR1. | |
| 1057 */ | |
| 1058 | |
| 1059 extern (C) static void pauseHandler(int sig) | |
| 1060 { int result; | |
| 1061 | |
| 1062 // Save all registers on the stack so they'll be scanned by the GC | |
| 1063 version(none) asm | |
| 1064 { | |
| 1065 pusha ; | |
| 1066 } | |
| 1067 | |
| 1068 assert(sig == SIGUSR1); | |
| 1069 | |
| 1070 sigset_t sigmask; | |
| 1071 result = sigfillset(&sigmask); | |
| 1072 assert(result == 0); | |
| 1073 result = sigdelset(&sigmask, SIGUSR2); | |
| 1074 assert(result == 0); | |
| 1075 | |
| 1076 Thread t = getThis(); | |
| 1077 t.stackTop = getESP(); | |
| 1078 t.flags &= ~1; | |
| 1079 // Release the semaphore _after_ stackTop is set | |
| 1080 sem_post(&flagSuspend); | |
| 1081 while (1) | |
| 1082 { | |
| 1083 sigsuspend(&sigmask); // suspend until SIGUSR2 | |
| 1084 if (t.flags & 1) // ensure it was resumeHandler() | |
| 1085 break; | |
| 1086 } | |
| 1087 | |
| 1088 // Restore all registers | |
| 1089 version(none) asm | |
| 1090 { | |
| 1091 popa ; | |
| 1092 } | |
| 1093 } | |
| 1094 | |
| 1095 /********************************** | |
| 1096 * This gets called when a thread gets SIGUSR2. | |
| 1097 */ | |
| 1098 | |
| 1099 extern (C) static void resumeHandler(int sig) | |
| 1100 { | |
| 1101 Thread t = getThis(); | |
| 1102 | |
| 1103 t.flags |= 1; | |
| 1104 } | |
| 1105 | |
| 1106 public static void* getESP() | |
| 1107 { | |
| 1108 version(D_InlineAsm_X86) | |
| 1109 { | |
| 1110 asm | |
| 1111 { naked ; | |
| 1112 mov EAX,ESP ; | |
| 1113 ret ; | |
| 1114 } | |
| 1115 } | |
| 1116 else | |
| 1117 { | |
| 1118 void* p = llvm_frameaddress(0); | |
| 1119 assert(p !is null); | |
| 1120 return p; | |
| 1121 } | |
| 1122 } | |
| 1123 } | |
| 1124 | |
| 1125 | |
| 1126 } | |
| 1127 |