1 /* 2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by John Birrell. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * Private thread definitions for the uthread kernel. 33 * 34 * $FreeBSD: src/lib/libpthread/thread/thr_private.h,v 1.120 2004/11/01 10:49:34 davidxu Exp $ 35 * $DragonFly: src/lib/libthread_xu/thread/thr_private.h,v 1.7 2005/06/21 07:47:01 davidxu Exp $ 36 */ 37 38 #ifndef _THR_PRIVATE_H 39 #define _THR_PRIVATE_H 40 41 /* 42 * Include files. 43 */ 44 #include <sys/types.h> 45 #include <sys/time.h> 46 #include <sys/cdefs.h> 47 #include <sys/queue.h> 48 #include <machine/atomic.h> 49 #include <errno.h> 50 #include <limits.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <sched.h> 54 #include <unistd.h> 55 #include <pthread.h> 56 #include <pthread_np.h> 57 58 #include "pthread_md.h" 59 #include "thr_umtx.h" 60 #include "thread_db.h" 61 62 /* 63 * Evaluate the storage class specifier. 64 */ 65 #ifdef GLOBAL_PTHREAD_PRIVATE 66 #define SCLASS 67 #define SCLASS_PRESET(x...) = x 68 #else 69 #define SCLASS extern 70 #define SCLASS_PRESET(x...) 71 #endif 72 73 /* Signal to do cancellation */ 74 #define SIGCANCEL 32 75 76 /* 77 * Kernel fatal error handler macro. 78 */ 79 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 80 81 /* Output debug messages like this: */ 82 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 83 #define stderr_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 84 85 #ifdef __DragonFly__ 86 #define __predict_true(exp) (exp) 87 #define __predict_false(exp) (exp) 88 #endif 89 90 #ifdef _PTHREADS_INVARIANTS 91 #define THR_ASSERT(cond, msg) do { \ 92 if (__predict_false(!(cond))) \ 93 PANIC(msg); \ 94 } while (0) 95 #else 96 #define THR_ASSERT(cond, msg) 97 #endif 98 99 #define TIMESPEC_ADD(dst, src, val) \ 100 do { \ 101 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 102 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 103 if ((dst)->tv_nsec >= 1000000000) { \ 104 (dst)->tv_sec++; \ 105 (dst)->tv_nsec -= 1000000000; \ 106 } \ 107 } while (0) 108 109 #define TIMESPEC_SUB(dst, src, val) \ 110 do { \ 111 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 112 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 113 if ((dst)->tv_nsec < 0) { \ 114 (dst)->tv_sec--; \ 115 (dst)->tv_nsec += 1000000000; \ 116 } \ 117 } while (0) 118 119 struct pthread_mutex { 120 /* 121 * Lock for accesses to this structure. 122 */ 123 volatile umtx_t m_lock; 124 enum pthread_mutextype m_type; 125 int m_protocol; 126 TAILQ_HEAD(mutex_head, pthread) m_queue; 127 struct pthread *m_owner; 128 long m_flags; 129 int m_count; 130 int m_refcount; 131 132 /* 133 * Used for priority inheritence and protection. 134 * 135 * m_prio - For priority inheritence, the highest active 136 * priority (threads locking the mutex inherit 137 * this priority). For priority protection, the 138 * ceiling priority of this mutex. 139 * m_saved_prio - mutex owners inherited priority before 140 * taking the mutex, restored when the owner 141 * unlocks the mutex. 142 */ 143 int m_prio; 144 int m_saved_prio; 145 146 /* 147 * Link for list of all mutexes a thread currently owns. 148 */ 149 TAILQ_ENTRY(pthread_mutex) m_qe; 150 }; 151 152 #define TAILQ_INITIALIZER { NULL, NULL } 153 154 #define PTHREAD_MUTEX_STATIC_INITIALIZER \ 155 {0, PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, TAILQ_INITIALIZER, \ 156 NULL, { NULL }, MUTEX_FLAGS_PRIVATE, 0, 0, 0, TAILQ_INITIALIZER } 157 /* 158 * Flags for mutexes. 159 */ 160 #define MUTEX_FLAGS_PRIVATE 0x01 161 #define MUTEX_FLAGS_INITED 0x02 162 #define MUTEX_FLAGS_BUSY 0x04 163 164 struct pthread_mutex_attr { 165 enum pthread_mutextype m_type; 166 int m_protocol; 167 int m_ceiling; 168 long m_flags; 169 }; 170 171 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 172 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 173 174 struct pthread_cond { 175 /* 176 * Lock for accesses to this structure. 177 */ 178 volatile umtx_t c_lock; 179 volatile umtx_t c_seqno; 180 volatile int c_waiters; 181 volatile int c_wakeups; 182 int c_pshared; 183 int c_clockid; 184 }; 185 186 struct pthread_cond_attr { 187 int c_pshared; 188 int c_clockid; 189 }; 190 191 struct pthread_barrier { 192 volatile umtx_t b_lock; 193 volatile umtx_t b_cycle; 194 volatile int b_count; 195 volatile int b_waiters; 196 }; 197 198 struct pthread_barrierattr { 199 int pshared; 200 }; 201 202 struct pthread_spinlock { 203 volatile umtx_t s_lock; 204 }; 205 206 /* 207 * Flags for condition variables. 208 */ 209 #define COND_FLAGS_PRIVATE 0x01 210 #define COND_FLAGS_INITED 0x02 211 #define COND_FLAGS_BUSY 0x04 212 213 /* 214 * Cleanup definitions. 215 */ 216 struct pthread_cleanup { 217 struct pthread_cleanup *next; 218 void (*routine)(); 219 void *routine_arg; 220 int onstack; 221 }; 222 223 #define THR_CLEANUP_PUSH(td, func, arg) { \ 224 struct pthread_cleanup __cup; \ 225 \ 226 __cup.routine = func; \ 227 __cup.routine_arg = arg; \ 228 __cup.onstack = 1; \ 229 __cup.next = (td)->cleanup; \ 230 (td)->cleanup = &__cup; 231 232 #define THR_CLEANUP_POP(td, exec) \ 233 (td)->cleanup = __cup.next; \ 234 if ((exec) != 0) \ 235 __cup.routine(__cup.routine_arg); \ 236 } 237 238 struct pthread_atfork { 239 TAILQ_ENTRY(pthread_atfork) qe; 240 void (*prepare)(void); 241 void (*parent)(void); 242 void (*child)(void); 243 }; 244 245 struct pthread_attr { 246 int sched_policy; 247 int sched_inherit; 248 int sched_interval; 249 int prio; 250 int suspend; 251 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 252 int flags; 253 void *arg_attr; 254 void (*cleanup_attr)(); 255 void *stackaddr_attr; 256 size_t stacksize_attr; 257 size_t guardsize_attr; 258 }; 259 260 /* 261 * Thread creation state attributes. 262 */ 263 #define THR_CREATE_RUNNING 0 264 #define THR_CREATE_SUSPENDED 1 265 266 /* 267 * Miscellaneous definitions. 268 */ 269 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 270 271 /* 272 * Maximum size of initial thread's stack. This perhaps deserves to be larger 273 * than the stacks of other threads, since many applications are likely to run 274 * almost entirely on this stack. 275 */ 276 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 277 278 /* 279 * Define the different priority ranges. All applications have thread 280 * priorities constrained within 0-31. The threads library raises the 281 * priority when delivering signals in order to ensure that signal 282 * delivery happens (from the POSIX spec) "as soon as possible". 283 * In the future, the threads library will also be able to map specific 284 * threads into real-time (cooperating) processes or kernel threads. 285 * The RT and SIGNAL priorities will be used internally and added to 286 * thread base priorities so that the scheduling queue can handle both 287 * normal and RT priority threads with and without signal handling. 288 * 289 * The approach taken is that, within each class, signal delivery 290 * always has priority over thread execution. 291 */ 292 #define THR_DEFAULT_PRIORITY 15 293 #define THR_MIN_PRIORITY 0 294 #define THR_MAX_PRIORITY 31 /* 0x1F */ 295 #define THR_SIGNAL_PRIORITY 32 /* 0x20 */ 296 #define THR_RT_PRIORITY 64 /* 0x40 */ 297 #define THR_FIRST_PRIORITY THR_MIN_PRIORITY 298 #define THR_LAST_PRIORITY \ 299 (THR_MAX_PRIORITY + THR_SIGNAL_PRIORITY + THR_RT_PRIORITY) 300 #define THR_BASE_PRIORITY(prio) ((prio) & THR_MAX_PRIORITY) 301 302 /* 303 * Time slice period in microseconds. 304 */ 305 #define TIMESLICE_USEC 20000 306 307 struct pthread_rwlockattr { 308 int pshared; 309 }; 310 311 struct pthread_rwlock { 312 pthread_mutex_t lock; /* monitor lock */ 313 pthread_cond_t read_signal; 314 pthread_cond_t write_signal; 315 int state; /* 0 = idle >0 = # of readers -1 = writer */ 316 int blocked_writers; 317 }; 318 319 /* 320 * Thread states. 321 */ 322 enum pthread_state { 323 PS_RUNNING, 324 PS_DEAD 325 }; 326 327 union pthread_wait_data { 328 pthread_mutex_t mutex; 329 }; 330 331 struct pthread_specific_elem { 332 const void *data; 333 int seqno; 334 }; 335 336 struct pthread_key { 337 volatile int allocated; 338 volatile int count; 339 int seqno; 340 void (*destructor)(void *); 341 }; 342 343 /* 344 * Thread structure. 345 */ 346 struct pthread { 347 /* 348 * Magic value to help recognize a valid thread structure 349 * from an invalid one: 350 */ 351 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 352 u_int32_t magic; 353 char *name; 354 u_int64_t uniqueid; /* for gdb */ 355 356 /* 357 * Lock for accesses to this thread structure. 358 */ 359 umtx_t lock; 360 361 /* Thread is terminated in kernel, written by kernel. */ 362 long terminated; 363 364 /* Kernel thread id. */ 365 long tid; 366 367 /* Internal condition variable cycle number. */ 368 umtx_t cycle; 369 370 /* How many low level locks the thread held. */ 371 int locklevel; 372 373 /* Signal blocked counter. */ 374 int sigblock; 375 376 /* Queue entry for list of all threads. */ 377 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 378 379 /* Queue entry for GC lists. */ 380 TAILQ_ENTRY(pthread) gcle; 381 382 /* Hash queue entry. */ 383 LIST_ENTRY(pthread) hle; 384 385 /* Threads reference count. */ 386 int refcount; 387 388 /* 389 * Thread start routine, argument, stack pointer and thread 390 * attributes. 391 */ 392 void *(*start_routine)(void *); 393 void *arg; 394 struct pthread_attr attr; 395 396 /* 397 * Cancelability flags 398 */ 399 #define THR_CANCEL_DISABLE 0x0001 400 #define THR_CANCEL_EXITING 0x0002 401 #define THR_CANCEL_AT_POINT 0x0004 402 #define THR_CANCEL_NEEDED 0x0008 403 #define SHOULD_CANCEL(val) \ 404 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 405 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED) 406 407 #define SHOULD_ASYNC_CANCEL(val) \ 408 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 409 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \ 410 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) 411 int cancelflags; 412 413 /* Thread temporary signal mask. */ 414 sigset_t sigmask; 415 416 /* Thread state: */ 417 umtx_t state; 418 419 /* 420 * Error variable used instead of errno, used for internal. 421 */ 422 int error; 423 424 /* 425 * The joiner is the thread that is joining to this thread. The 426 * join status keeps track of a join operation to another thread. 427 */ 428 struct pthread *joiner; 429 430 /* 431 * The current thread can belong to a priority mutex queue. 432 * This is the synchronization queue link. 433 */ 434 TAILQ_ENTRY(pthread) sqe; 435 436 /* Wait data. */ 437 union pthread_wait_data data; 438 439 int sflags; 440 #define THR_FLAGS_IN_SYNCQ 0x0001 441 442 /* Miscellaneous flags; only set with scheduling lock held. */ 443 int flags; 444 #define THR_FLAGS_PRIVATE 0x0001 445 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 446 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 447 448 /* Thread list flags; only set with thread list lock held. */ 449 int tlflags; 450 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 451 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 452 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 453 #define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 454 455 /* 456 * Base priority is the user setable and retrievable priority 457 * of the thread. It is only affected by explicit calls to 458 * set thread priority and upon thread creation via a thread 459 * attribute or default priority. 460 */ 461 char base_priority; 462 463 /* 464 * Inherited priority is the priority a thread inherits by 465 * taking a priority inheritence or protection mutex. It 466 * is not affected by base priority changes. Inherited 467 * priority defaults to and remains 0 until a mutex is taken 468 * that is being waited on by any other thread whose priority 469 * is non-zero. 470 */ 471 char inherited_priority; 472 473 /* 474 * Active priority is always the maximum of the threads base 475 * priority and inherited priority. When there is a change 476 * in either the base or inherited priority, the active 477 * priority must be recalculated. 478 */ 479 char active_priority; 480 481 /* Number of priority ceiling or protection mutexes owned. */ 482 int priority_mutex_count; 483 484 /* Queue of currently owned simple type mutexes. */ 485 TAILQ_HEAD(, pthread_mutex) mutexq; 486 487 /* Queue of currently owned priority type mutexs. */ 488 TAILQ_HEAD(, pthread_mutex) pri_mutexq; 489 490 void *ret; 491 struct pthread_specific_elem *specific; 492 int specific_data_count; 493 494 /* Number rwlocks rdlocks held. */ 495 int rdlock_count; 496 497 /* 498 * Current locks bitmap for rtld. */ 499 int rtld_bits; 500 501 /* Thread control block */ 502 struct tls_tcb *tcb; 503 504 /* Cleanup handlers Link List */ 505 struct pthread_cleanup *cleanup; 506 507 /* Enable event reporting */ 508 int report_events; 509 510 /* Event mask */ 511 td_thr_events_t event_mask; 512 513 /* Event */ 514 td_event_msg_t event_buf; 515 }; 516 517 #define THR_UMTX_TRYLOCK(thrd, lck) \ 518 _thr_umtx_trylock((lck), (thrd)->tid) 519 520 #define THR_UMTX_LOCK(thrd, lck) \ 521 _thr_umtx_lock((lck), (thrd)->tid) 522 523 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 524 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 525 526 #define THR_UMTX_UNLOCK(thrd, lck) \ 527 _thr_umtx_unlock((lck), (thrd)->tid) 528 529 #define THR_LOCK_ACQUIRE(thrd, lck) \ 530 do { \ 531 (thrd)->locklevel++; \ 532 _thr_umtx_lock(lck, (thrd)->tid); \ 533 } while (0) 534 535 #define THR_LOCK_RELEASE(thrd, lck) \ 536 do { \ 537 if ((thrd)->locklevel > 0) { \ 538 _thr_umtx_unlock((lck), (thrd)->tid); \ 539 (thrd)->locklevel--; \ 540 } else { \ 541 _thr_assert_lock_level(); \ 542 } \ 543 } while (0) 544 545 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 546 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 547 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 548 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 549 550 #define THREAD_LIST_LOCK(curthrd) \ 551 do { \ 552 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 553 } while (0) 554 555 #define THREAD_LIST_UNLOCK(curthrd) \ 556 do { \ 557 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 558 } while (0) 559 560 /* 561 * Macros to insert/remove threads to the all thread list and 562 * the gc list. 563 */ 564 #define THR_LIST_ADD(thrd) do { \ 565 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 566 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 567 _thr_hash_add(thrd); \ 568 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 569 } \ 570 } while (0) 571 #define THR_LIST_REMOVE(thrd) do { \ 572 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 573 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 574 _thr_hash_remove(thrd); \ 575 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 576 } \ 577 } while (0) 578 #define THR_GCLIST_ADD(thrd) do { \ 579 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 580 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 581 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 582 _gc_count++; \ 583 } \ 584 } while (0) 585 #define THR_GCLIST_REMOVE(thrd) do { \ 586 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 587 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 588 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 589 _gc_count--; \ 590 } \ 591 } while (0) 592 593 #define GC_NEEDED() (_gc_count >= 5) 594 595 #define THR_IN_SYNCQ(thrd) (((thrd)->sflags & THR_FLAGS_IN_SYNCQ) != 0) 596 597 #define SHOULD_REPORT_EVENT(curthr, e) \ 598 (curthr->report_events && \ 599 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 600 601 extern int __isthreaded; 602 603 /* 604 * Global variables for the pthread kernel. 605 */ 606 607 SCLASS void *_usrstack SCLASS_PRESET(NULL); 608 SCLASS struct pthread *_thr_initial SCLASS_PRESET(NULL); 609 SCLASS int _thread_scope_system SCLASS_PRESET(0); 610 611 /* For debugger */ 612 SCLASS int _libthread_xu_debug SCLASS_PRESET(0); 613 SCLASS int _thread_event_mask SCLASS_PRESET(0); 614 SCLASS struct pthread *_thread_last_event; 615 616 /* List of all threads: */ 617 SCLASS TAILQ_HEAD(, pthread) _thread_list 618 SCLASS_PRESET(TAILQ_HEAD_INITIALIZER(_thread_list)); 619 620 /* List of threads needing GC: */ 621 SCLASS TAILQ_HEAD(, pthread) _thread_gc_list 622 SCLASS_PRESET(TAILQ_HEAD_INITIALIZER(_thread_gc_list)); 623 624 SCLASS int _thread_active_threads SCLASS_PRESET(1); 625 626 SCLASS TAILQ_HEAD(atfork_head, pthread_atfork) _thr_atfork_list; 627 SCLASS umtx_t _thr_atfork_lock; 628 629 /* Default thread attributes: */ 630 SCLASS struct pthread_attr _pthread_attr_default 631 SCLASS_PRESET({ 632 .sched_policy = SCHED_RR, 633 .sched_inherit = 0, 634 .sched_interval = TIMESLICE_USEC, 635 .prio = THR_DEFAULT_PRIORITY, 636 .suspend = THR_CREATE_RUNNING, 637 .flags = 0, 638 .arg_attr = NULL, 639 .cleanup_attr = NULL, 640 .stackaddr_attr = NULL, 641 .stacksize_attr = THR_STACK_DEFAULT, 642 .guardsize_attr = 0 643 }); 644 645 /* Default mutex attributes: */ 646 SCLASS struct pthread_mutex_attr _pthread_mutexattr_default 647 SCLASS_PRESET({ 648 .m_type = PTHREAD_MUTEX_DEFAULT, 649 .m_protocol = PTHREAD_PRIO_NONE, 650 .m_ceiling = 0, 651 .m_flags = 0 652 }); 653 654 /* Default condition variable attributes: */ 655 SCLASS struct pthread_cond_attr _pthread_condattr_default 656 SCLASS_PRESET({ 657 .c_pshared = PTHREAD_PROCESS_PRIVATE, 658 .c_clockid = CLOCK_REALTIME 659 }); 660 661 SCLASS pid_t _thr_pid SCLASS_PRESET(0); 662 SCLASS int _thr_guard_default; 663 SCLASS int _thr_stack_default SCLASS_PRESET(THR_STACK_DEFAULT); 664 SCLASS int _thr_stack_initial SCLASS_PRESET(THR_STACK_INITIAL); 665 SCLASS int _thr_page_size; 666 /* Garbage thread count. */ 667 SCLASS int _gc_count SCLASS_PRESET(0); 668 669 SCLASS umtx_t _mutex_static_lock; 670 SCLASS umtx_t _cond_static_lock; 671 SCLASS umtx_t _rwlock_static_lock; 672 SCLASS umtx_t _keytable_lock; 673 SCLASS umtx_t _thr_list_lock; 674 SCLASS umtx_t _thr_event_lock; 675 676 /* Undefine the storage class and preset specifiers: */ 677 #undef SCLASS 678 #undef SCLASS_PRESET 679 680 /* 681 * Function prototype definitions. 682 */ 683 __BEGIN_DECLS 684 int _thr_setthreaded(int); 685 int _mutex_cv_lock(pthread_mutex_t *); 686 int _mutex_cv_unlock(pthread_mutex_t *); 687 void _mutex_notify_priochange(struct pthread *, struct pthread *, int); 688 int _mutex_reinit(pthread_mutex_t *); 689 void _mutex_fork(struct pthread *curthread); 690 void _mutex_unlock_private(struct pthread *); 691 void _libpthread_init(struct pthread *); 692 void *_pthread_getspecific(pthread_key_t); 693 int _pthread_cond_init(pthread_cond_t *, const pthread_condattr_t *); 694 int _pthread_cond_destroy(pthread_cond_t *); 695 int _pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *); 696 int _pthread_cond_timedwait(pthread_cond_t *, pthread_mutex_t *, 697 const struct timespec *); 698 int _pthread_cond_signal(pthread_cond_t *); 699 int _pthread_cond_broadcast(pthread_cond_t *); 700 int _pthread_key_create(pthread_key_t *, void (*) (void *)); 701 int _pthread_key_delete(pthread_key_t); 702 int _pthread_mutex_destroy(pthread_mutex_t *); 703 int _pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *); 704 int _pthread_mutex_lock(pthread_mutex_t *); 705 int _pthread_mutex_trylock(pthread_mutex_t *); 706 int _pthread_mutex_unlock(pthread_mutex_t *); 707 int _pthread_mutexattr_init(pthread_mutexattr_t *); 708 int _pthread_mutexattr_destroy(pthread_mutexattr_t *); 709 int _pthread_mutexattr_settype(pthread_mutexattr_t *, int); 710 int _pthread_once(pthread_once_t *, void (*) (void)); 711 int _pthread_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *); 712 int _pthread_rwlock_destroy (pthread_rwlock_t *); 713 struct pthread *_pthread_self(void); 714 int _pthread_setspecific(pthread_key_t, const void *); 715 void _pthread_testcancel(void); 716 void _pthread_yield(void); 717 void _pthread_cleanup_push(void (*routine) (void *), void *routine_arg); 718 void _pthread_cleanup_pop(int execute); 719 struct pthread *_thr_alloc(struct pthread *); 720 void _thread_exit(char *, int, char *) __dead2; 721 void _thr_exit_cleanup(void); 722 int _thr_ref_add(struct pthread *, struct pthread *, int); 723 void _thr_ref_delete(struct pthread *, struct pthread *); 724 int _thr_find_thread(struct pthread *, struct pthread *, int); 725 void _thr_rtld_init(void); 726 void _thr_rtld_fini(void); 727 int _thr_stack_alloc(struct pthread_attr *); 728 void _thr_stack_free(struct pthread_attr *); 729 void _thr_free(struct pthread *, struct pthread *); 730 void _thr_gc(struct pthread *); 731 void _thread_cleanupspecific(void); 732 void _thread_dump_info(void); 733 void _thread_printf(int, const char *, ...); 734 void _thr_spinlock_init(void); 735 int _thr_cancel_enter(struct pthread *); 736 void _thr_cancel_leave(struct pthread *, int); 737 void _thr_signal_block(struct pthread *); 738 void _thr_signal_unblock(struct pthread *); 739 void _thr_signal_init(void); 740 void _thr_signal_deinit(void); 741 int _thr_send_sig(struct pthread *, int sig); 742 void _thr_list_init(); 743 void _thr_hash_add(struct pthread *); 744 void _thr_hash_remove(struct pthread *); 745 struct pthread *_thr_hash_find(struct pthread *); 746 void _thr_link(struct pthread *curthread, struct pthread *thread); 747 void _thr_unlink(struct pthread *curthread, struct pthread *thread); 748 void _thr_suspend_check(struct pthread *curthread); 749 void _thr_assert_lock_level() __dead2; 750 int _thr_get_tid(void); 751 void _thr_report_creation(struct pthread *curthread, 752 struct pthread *newthread); 753 void _thr_report_death(struct pthread *curthread); 754 void _thread_bp_create(void); 755 void _thread_bp_death(void); 756 757 /* #include <sys/aio.h> */ 758 #ifdef _SYS_AIO_H_ 759 int __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *); 760 #endif 761 762 /* #include <fcntl.h> */ 763 #ifdef _SYS_FCNTL_H_ 764 int __sys_fcntl(int, int, ...); 765 int __sys_open(const char *, int, ...); 766 #endif 767 768 /* #include <sys/ioctl.h> */ 769 #ifdef _SYS_IOCTL_H_ 770 int __sys_ioctl(int, unsigned long, ...); 771 #endif 772 773 /* #inclde <sched.h> */ 774 #ifdef _SCHED_H_ 775 int __sys_sched_yield(void); 776 #endif 777 778 /* #include <signal.h> */ 779 #ifdef _SIGNAL_H_ 780 int __sys_kill(pid_t, int); 781 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 782 int __sys_sigpending(sigset_t *); 783 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 784 int __sys_sigsuspend(const sigset_t *); 785 int __sys_sigreturn(ucontext_t *); 786 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 787 #endif 788 789 /* #include <sys/socket.h> */ 790 #ifdef _SYS_SOCKET_H_ 791 int __sys_accept(int, struct sockaddr *, socklen_t *); 792 int __sys_connect(int, const struct sockaddr *, socklen_t); 793 ssize_t __sys_recv(int, void *, size_t, int); 794 ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 795 ssize_t __sys_recvmsg(int, struct msghdr *, int); 796 int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, 797 off_t *, int); 798 ssize_t __sys_sendmsg(int, const struct msghdr *, int); 799 ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 800 #endif 801 802 /* #include <sys/uio.h> */ 803 #ifdef _SYS_UIO_H_ 804 ssize_t __sys_readv(int, const struct iovec *, int); 805 ssize_t __sys_writev(int, const struct iovec *, int); 806 #endif 807 808 /* #include <time.h> */ 809 #ifdef _TIME_H_ 810 int __sys_nanosleep(const struct timespec *, struct timespec *); 811 #endif 812 813 /* #include <unistd.h> */ 814 #ifdef _UNISTD_H_ 815 int __sys_close(int); 816 int __sys_execve(const char *, char * const *, char * const *); 817 int __sys_fork(void); 818 int __sys_fsync(int); 819 pid_t __sys_getpid(void); 820 int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 821 ssize_t __sys_read(int, void *, size_t); 822 ssize_t __sys_write(int, const void *, size_t); 823 void __sys_exit(int); 824 int __sys_sigwait(const sigset_t *, int *); 825 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 826 const struct timespec *); 827 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 828 #endif 829 830 /* #include <poll.h> */ 831 #ifdef _SYS_POLL_H_ 832 int __sys_poll(struct pollfd *, unsigned, int); 833 #endif 834 835 /* #include <sys/mman.h> */ 836 #ifdef _SYS_MMAN_H_ 837 int __sys_msync(void *, size_t, int); 838 #endif 839 840 static inline int 841 _thr_isthreaded(void) 842 { 843 return (__isthreaded != 0); 844 } 845 846 static inline int 847 _thr_is_inited(void) 848 { 849 return (_thr_initial != 0); 850 } 851 852 static inline void 853 _thr_check_init(void) 854 { 855 if (_thr_initial == 0) 856 _libpthread_init(0); 857 } 858 859 __END_DECLS 860 861 #endif /* !_THR_PRIVATE_H */ 862