1 /* 2 * Copyright (C) 2005 Daniel M. Eischen <deischen@freebsd.org> 3 * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 4 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. 5 * 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _THR_PRIVATE_H 33 #define _THR_PRIVATE_H 34 35 /* 36 * Include files. 37 */ 38 #include <sys/types.h> 39 #include <sys/time.h> 40 #include <sys/cdefs.h> 41 #include <sys/queue.h> 42 #include <sys/param.h> 43 #include <sys/cpuset.h> 44 #include <machine/atomic.h> 45 #include <errno.h> 46 #include <limits.h> 47 #include <signal.h> 48 #include <stddef.h> 49 #include <stdio.h> 50 #include <unistd.h> 51 #include <ucontext.h> 52 #include <sys/thr.h> 53 #include <pthread.h> 54 55 #define SYM_FB10(sym) __CONCAT(sym, _fb10) 56 #define SYM_FBP10(sym) __CONCAT(sym, _fbp10) 57 #define WEAK_REF(sym, alias) __weak_reference(sym, alias) 58 #define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver) 59 #define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver) 60 61 #define FB10_COMPAT(func, sym) \ 62 WEAK_REF(func, SYM_FB10(sym)); \ 63 SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0) 64 65 #define FB10_COMPAT_PRIVATE(func, sym) \ 66 WEAK_REF(func, SYM_FBP10(sym)); \ 67 SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0) 68 69 #include "pthread_md.h" 70 #include "thr_umtx.h" 71 #include "thread_db.h" 72 73 #ifdef _PTHREAD_FORCED_UNWIND 74 #define _BSD_SOURCE 75 #include <unwind.h> 76 #endif 77 78 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 79 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 80 TAILQ_HEAD(mutex_queue, pthread_mutex); 81 82 /* Signal to do cancellation */ 83 #define SIGCANCEL 32 84 85 /* 86 * Kernel fatal error handler macro. 87 */ 88 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 89 90 /* Output debug messages like this: */ 91 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 92 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) 93 94 #ifdef _PTHREADS_INVARIANTS 95 #define THR_ASSERT(cond, msg) do { \ 96 if (__predict_false(!(cond))) \ 97 PANIC(msg); \ 98 } while (0) 99 #else 100 #define THR_ASSERT(cond, msg) 101 #endif 102 103 #ifdef PIC 104 # define STATIC_LIB_REQUIRE(name) 105 #else 106 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 107 #endif 108 109 #define TIMESPEC_ADD(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 >= 1000000000) { \ 114 (dst)->tv_sec++; \ 115 (dst)->tv_nsec -= 1000000000; \ 116 } \ 117 } while (0) 118 119 #define TIMESPEC_SUB(dst, src, val) \ 120 do { \ 121 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 122 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 123 if ((dst)->tv_nsec < 0) { \ 124 (dst)->tv_sec--; \ 125 (dst)->tv_nsec += 1000000000; \ 126 } \ 127 } while (0) 128 129 /* XXX These values should be same as those defined in pthread.h */ 130 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL) 131 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1) 132 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2) 133 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL) 134 #define THR_COND_DESTROYED ((struct pthread_cond *)1) 135 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL) 136 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1) 137 138 #define PMUTEX_FLAG_TYPE_MASK 0x0ff 139 #define PMUTEX_FLAG_PRIVATE 0x100 140 #define PMUTEX_FLAG_DEFERED 0x200 141 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK) 142 143 #define MAX_DEFER_WAITERS 50 144 145 struct pthread_mutex { 146 /* 147 * Lock for accesses to this structure. 148 */ 149 struct umutex m_lock; 150 int m_flags; 151 struct pthread *m_owner; 152 int m_count; 153 int m_spinloops; 154 int m_yieldloops; 155 /* 156 * Link for all mutexes a thread currently owns. 157 */ 158 TAILQ_ENTRY(pthread_mutex) m_qe; 159 }; 160 161 struct pthread_mutex_attr { 162 enum pthread_mutextype m_type; 163 int m_protocol; 164 int m_ceiling; 165 }; 166 167 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 168 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 169 170 struct pthread_cond { 171 __uint32_t __has_user_waiters; 172 __uint32_t __has_kern_waiters; 173 __uint32_t __flags; 174 __uint32_t __clock_id; 175 }; 176 177 struct pthread_cond_attr { 178 int c_pshared; 179 int c_clockid; 180 }; 181 182 struct pthread_barrier { 183 struct umutex b_lock; 184 struct ucond b_cv; 185 volatile int64_t b_cycle; 186 volatile int b_count; 187 volatile int b_waiters; 188 }; 189 190 struct pthread_barrierattr { 191 int pshared; 192 }; 193 194 struct pthread_spinlock { 195 struct umutex s_lock; 196 }; 197 198 /* 199 * Flags for condition variables. 200 */ 201 #define COND_FLAGS_PRIVATE 0x01 202 #define COND_FLAGS_INITED 0x02 203 #define COND_FLAGS_BUSY 0x04 204 205 /* 206 * Cleanup definitions. 207 */ 208 struct pthread_cleanup { 209 struct pthread_cleanup *prev; 210 void (*routine)(void *); 211 void *routine_arg; 212 int onheap; 213 }; 214 215 #define THR_CLEANUP_PUSH(td, func, arg) { \ 216 struct pthread_cleanup __cup; \ 217 \ 218 __cup.routine = func; \ 219 __cup.routine_arg = arg; \ 220 __cup.onheap = 0; \ 221 __cup.prev = (td)->cleanup; \ 222 (td)->cleanup = &__cup; 223 224 #define THR_CLEANUP_POP(td, exec) \ 225 (td)->cleanup = __cup.prev; \ 226 if ((exec) != 0) \ 227 __cup.routine(__cup.routine_arg); \ 228 } 229 230 struct pthread_atfork { 231 TAILQ_ENTRY(pthread_atfork) qe; 232 void (*prepare)(void); 233 void (*parent)(void); 234 void (*child)(void); 235 }; 236 237 struct pthread_attr { 238 #define pthread_attr_start_copy sched_policy 239 int sched_policy; 240 int sched_inherit; 241 int prio; 242 int suspend; 243 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 244 int flags; 245 void *stackaddr_attr; 246 size_t stacksize_attr; 247 size_t guardsize_attr; 248 #define pthread_attr_end_copy cpuset 249 cpuset_t *cpuset; 250 size_t cpusetsize; 251 }; 252 253 struct wake_addr { 254 struct wake_addr *link; 255 unsigned int value; 256 char pad[12]; 257 }; 258 259 struct sleepqueue { 260 TAILQ_HEAD(, pthread) sq_blocked; 261 SLIST_HEAD(, sleepqueue) sq_freeq; 262 LIST_ENTRY(sleepqueue) sq_hash; 263 SLIST_ENTRY(sleepqueue) sq_flink; 264 void *sq_wchan; 265 int sq_type; 266 }; 267 268 /* 269 * Thread creation state attributes. 270 */ 271 #define THR_CREATE_RUNNING 0 272 #define THR_CREATE_SUSPENDED 1 273 274 /* 275 * Miscellaneous definitions. 276 */ 277 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 278 279 /* 280 * Maximum size of initial thread's stack. This perhaps deserves to be larger 281 * than the stacks of other threads, since many applications are likely to run 282 * almost entirely on this stack. 283 */ 284 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 285 286 /* 287 * Define priorities returned by kernel. 288 */ 289 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 290 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 291 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 292 293 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 294 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 295 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 296 297 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 298 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 299 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 300 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 301 302 struct pthread_prio { 303 int pri_min; 304 int pri_max; 305 int pri_default; 306 }; 307 308 struct pthread_rwlockattr { 309 int pshared; 310 }; 311 312 struct pthread_rwlock { 313 struct urwlock lock; 314 struct pthread *owner; 315 }; 316 317 /* 318 * Thread states. 319 */ 320 enum pthread_state { 321 PS_RUNNING, 322 PS_DEAD 323 }; 324 325 struct pthread_specific_elem { 326 const void *data; 327 int seqno; 328 }; 329 330 struct pthread_key { 331 volatile int allocated; 332 int seqno; 333 void (*destructor)(void *); 334 }; 335 336 /* 337 * lwpid_t is 32bit but kernel thr API exports tid as long type 338 * in very earily date. 339 */ 340 #define TID(thread) ((uint32_t) ((thread)->tid)) 341 342 /* 343 * Thread structure. 344 */ 345 struct pthread { 346 /* Kernel thread id. */ 347 long tid; 348 #define TID_TERMINATED 1 349 350 /* 351 * Lock for accesses to this thread structure. 352 */ 353 struct umutex lock; 354 355 /* Internal condition variable cycle number. */ 356 uint32_t cycle; 357 358 /* How many low level locks the thread held. */ 359 int locklevel; 360 361 /* 362 * Set to non-zero when this thread has entered a critical 363 * region. We allow for recursive entries into critical regions. 364 */ 365 int critical_count; 366 367 /* Signal blocked counter. */ 368 int sigblock; 369 370 /* Queue entry for list of all threads. */ 371 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 372 373 /* Queue entry for GC lists. */ 374 TAILQ_ENTRY(pthread) gcle; 375 376 /* Hash queue entry. */ 377 LIST_ENTRY(pthread) hle; 378 379 /* Sleep queue entry */ 380 TAILQ_ENTRY(pthread) wle; 381 382 /* Threads reference count. */ 383 int refcount; 384 385 /* 386 * Thread start routine, argument, stack pointer and thread 387 * attributes. 388 */ 389 void *(*start_routine)(void *); 390 void *arg; 391 struct pthread_attr attr; 392 393 #define SHOULD_CANCEL(thr) \ 394 ((thr)->cancel_pending && (thr)->cancel_enable && \ 395 (thr)->no_cancel == 0) 396 397 /* Cancellation is enabled */ 398 int cancel_enable; 399 400 /* Cancellation request is pending */ 401 int cancel_pending; 402 403 /* Thread is at cancellation point */ 404 int cancel_point; 405 406 /* Cancellation is temporarily disabled */ 407 int no_cancel; 408 409 /* Asynchronouse cancellation is enabled */ 410 int cancel_async; 411 412 /* Cancellation is in progress */ 413 int cancelling; 414 415 /* Thread temporary signal mask. */ 416 sigset_t sigmask; 417 418 /* Thread should unblock SIGCANCEL. */ 419 int unblock_sigcancel; 420 421 /* In sigsuspend state */ 422 int in_sigsuspend; 423 424 /* deferred signal info */ 425 siginfo_t deferred_siginfo; 426 427 /* signal mask to restore. */ 428 sigset_t deferred_sigmask; 429 430 /* the sigaction should be used for deferred signal. */ 431 struct sigaction deferred_sigact; 432 433 /* Force new thread to exit. */ 434 int force_exit; 435 436 /* Thread state: */ 437 enum pthread_state state; 438 439 /* 440 * Error variable used instead of errno. The function __error() 441 * returns a pointer to this. 442 */ 443 int error; 444 445 /* 446 * The joiner is the thread that is joining to this thread. The 447 * join status keeps track of a join operation to another thread. 448 */ 449 struct pthread *joiner; 450 451 /* Miscellaneous flags; only set with scheduling lock held. */ 452 int flags; 453 #define THR_FLAGS_PRIVATE 0x0001 454 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 455 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 456 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ 457 458 /* Thread list flags; only set with thread list lock held. */ 459 int tlflags; 460 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 461 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 462 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 463 464 /* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */ 465 struct mutex_queue mutexq; 466 467 /* Queue of all owned PRIO_PROTECT mutexes. */ 468 struct mutex_queue pp_mutexq; 469 470 void *ret; 471 struct pthread_specific_elem *specific; 472 int specific_data_count; 473 474 /* Number rwlocks rdlocks held. */ 475 int rdlock_count; 476 477 /* 478 * Current locks bitmap for rtld. */ 479 int rtld_bits; 480 481 /* Thread control block */ 482 struct tcb *tcb; 483 484 /* Cleanup handlers Link List */ 485 struct pthread_cleanup *cleanup; 486 487 #ifdef _PTHREAD_FORCED_UNWIND 488 struct _Unwind_Exception ex; 489 void *unwind_stackend; 490 int unwind_disabled; 491 #endif 492 493 /* 494 * Magic value to help recognize a valid thread structure 495 * from an invalid one: 496 */ 497 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 498 u_int32_t magic; 499 500 /* Enable event reporting */ 501 int report_events; 502 503 /* Event mask */ 504 int event_mask; 505 506 /* Event */ 507 td_event_msg_t event_buf; 508 509 struct wake_addr *wake_addr; 510 #define WAKE_ADDR(td) ((td)->wake_addr) 511 512 /* Sleep queue */ 513 struct sleepqueue *sleepqueue; 514 515 /* Wait channel */ 516 void *wchan; 517 518 /* Referenced mutex. */ 519 struct pthread_mutex *mutex_obj; 520 521 /* Thread will sleep. */ 522 int will_sleep; 523 524 /* Number of threads deferred. */ 525 int nwaiter_defer; 526 527 /* Deferred threads from pthread_cond_signal. */ 528 unsigned int *defer_waiters[MAX_DEFER_WAITERS]; 529 }; 530 531 #define THR_SHOULD_GC(thrd) \ 532 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 533 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 534 535 #define THR_IN_CRITICAL(thrd) \ 536 (((thrd)->locklevel > 0) || \ 537 ((thrd)->critical_count > 0)) 538 539 #define THR_CRITICAL_ENTER(thrd) \ 540 (thrd)->critical_count++ 541 542 #define THR_CRITICAL_LEAVE(thrd) \ 543 do { \ 544 (thrd)->critical_count--; \ 545 _thr_ast(thrd); \ 546 } while (0) 547 548 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 549 _thr_umutex_trylock((lck), TID(thrd)) 550 551 #define THR_UMUTEX_LOCK(thrd, lck) \ 552 _thr_umutex_lock((lck), TID(thrd)) 553 554 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 555 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 556 557 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 558 _thr_umutex_unlock((lck), TID(thrd)) 559 560 #define THR_LOCK_ACQUIRE(thrd, lck) \ 561 do { \ 562 (thrd)->locklevel++; \ 563 _thr_umutex_lock(lck, TID(thrd)); \ 564 } while (0) 565 566 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 567 do { \ 568 (thrd)->locklevel++; \ 569 _thr_umutex_lock_spin(lck, TID(thrd)); \ 570 } while (0) 571 572 #ifdef _PTHREADS_INVARIANTS 573 #define THR_ASSERT_LOCKLEVEL(thrd) \ 574 do { \ 575 if (__predict_false((thrd)->locklevel <= 0)) \ 576 _thr_assert_lock_level(); \ 577 } while (0) 578 #else 579 #define THR_ASSERT_LOCKLEVEL(thrd) 580 #endif 581 582 #define THR_LOCK_RELEASE(thrd, lck) \ 583 do { \ 584 THR_ASSERT_LOCKLEVEL(thrd); \ 585 _thr_umutex_unlock((lck), TID(thrd)); \ 586 (thrd)->locklevel--; \ 587 _thr_ast(thrd); \ 588 } while (0) 589 590 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 591 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 592 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 593 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 594 595 #define THREAD_LIST_RDLOCK(curthrd) \ 596 do { \ 597 (curthrd)->locklevel++; \ 598 _thr_rwl_rdlock(&_thr_list_lock); \ 599 } while (0) 600 601 #define THREAD_LIST_WRLOCK(curthrd) \ 602 do { \ 603 (curthrd)->locklevel++; \ 604 _thr_rwl_wrlock(&_thr_list_lock); \ 605 } while (0) 606 607 #define THREAD_LIST_UNLOCK(curthrd) \ 608 do { \ 609 _thr_rwl_unlock(&_thr_list_lock); \ 610 (curthrd)->locklevel--; \ 611 _thr_ast(curthrd); \ 612 } while (0) 613 614 /* 615 * Macros to insert/remove threads to the all thread list and 616 * the gc list. 617 */ 618 #define THR_LIST_ADD(thrd) do { \ 619 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 620 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 621 _thr_hash_add(thrd); \ 622 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 623 } \ 624 } while (0) 625 #define THR_LIST_REMOVE(thrd) do { \ 626 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 627 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 628 _thr_hash_remove(thrd); \ 629 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 630 } \ 631 } while (0) 632 #define THR_GCLIST_ADD(thrd) do { \ 633 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 634 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 635 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 636 _gc_count++; \ 637 } \ 638 } while (0) 639 #define THR_GCLIST_REMOVE(thrd) do { \ 640 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 641 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 642 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 643 _gc_count--; \ 644 } \ 645 } while (0) 646 647 #define THR_REF_ADD(curthread, pthread) { \ 648 THR_CRITICAL_ENTER(curthread); \ 649 pthread->refcount++; \ 650 } while (0) 651 652 #define THR_REF_DEL(curthread, pthread) { \ 653 pthread->refcount--; \ 654 THR_CRITICAL_LEAVE(curthread); \ 655 } while (0) 656 657 #define GC_NEEDED() (_gc_count >= 5) 658 659 #define SHOULD_REPORT_EVENT(curthr, e) \ 660 (curthr->report_events && \ 661 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 662 663 extern int __isthreaded; 664 665 /* 666 * Global variables for the pthread kernel. 667 */ 668 669 extern char *_usrstack __hidden; 670 extern struct pthread *_thr_initial __hidden; 671 672 /* For debugger */ 673 extern int _libthr_debug; 674 extern int _thread_event_mask; 675 extern struct pthread *_thread_last_event; 676 677 /* List of all threads: */ 678 extern pthreadlist _thread_list; 679 680 /* List of threads needing GC: */ 681 extern pthreadlist _thread_gc_list __hidden; 682 683 extern int _thread_active_threads; 684 extern atfork_head _thr_atfork_list __hidden; 685 extern struct urwlock _thr_atfork_lock __hidden; 686 687 /* Default thread attributes: */ 688 extern struct pthread_attr _pthread_attr_default __hidden; 689 690 /* Default mutex attributes: */ 691 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 692 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 693 694 /* Default condition variable attributes: */ 695 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 696 697 extern struct pthread_prio _thr_priorities[] __hidden; 698 699 extern pid_t _thr_pid __hidden; 700 extern int _thr_is_smp __hidden; 701 702 extern size_t _thr_guard_default __hidden; 703 extern size_t _thr_stack_default __hidden; 704 extern size_t _thr_stack_initial __hidden; 705 extern int _thr_page_size __hidden; 706 extern int _thr_spinloops __hidden; 707 extern int _thr_yieldloops __hidden; 708 709 /* Garbage thread count. */ 710 extern int _gc_count __hidden; 711 712 extern struct umutex _mutex_static_lock __hidden; 713 extern struct umutex _cond_static_lock __hidden; 714 extern struct umutex _rwlock_static_lock __hidden; 715 extern struct umutex _keytable_lock __hidden; 716 extern struct urwlock _thr_list_lock __hidden; 717 extern struct umutex _thr_event_lock __hidden; 718 719 /* 720 * Function prototype definitions. 721 */ 722 __BEGIN_DECLS 723 int _thr_setthreaded(int) __hidden; 724 int _mutex_cv_lock(struct pthread_mutex *, int count) __hidden; 725 int _mutex_cv_unlock(struct pthread_mutex *, int *count) __hidden; 726 int _mutex_cv_attach(struct pthread_mutex *, int count) __hidden; 727 int _mutex_cv_detach(struct pthread_mutex *, int *count) __hidden; 728 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 729 int _mutex_reinit(pthread_mutex_t *) __hidden; 730 void _mutex_fork(struct pthread *curthread) __hidden; 731 void _libpthread_init(struct pthread *) __hidden; 732 struct pthread *_thr_alloc(struct pthread *) __hidden; 733 void _thread_exit(const char *, int, const char *) __hidden __dead2; 734 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 735 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 736 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 737 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 738 void _thr_rtld_init(void) __hidden; 739 void _thr_rtld_fini(void) __hidden; 740 void _thr_rtld_postfork_child(void) __hidden; 741 int _thr_stack_alloc(struct pthread_attr *) __hidden; 742 void _thr_stack_free(struct pthread_attr *) __hidden; 743 void _thr_free(struct pthread *, struct pthread *) __hidden; 744 void _thr_gc(struct pthread *) __hidden; 745 void _thread_cleanupspecific(void) __hidden; 746 void _thread_printf(int, const char *, ...) __hidden; 747 void _thr_spinlock_init(void) __hidden; 748 void _thr_cancel_enter(struct pthread *) __hidden; 749 void _thr_cancel_enter2(struct pthread *, int) __hidden; 750 void _thr_cancel_leave(struct pthread *, int) __hidden; 751 void _thr_testcancel(struct pthread *) __hidden; 752 void _thr_signal_block(struct pthread *) __hidden; 753 void _thr_signal_unblock(struct pthread *) __hidden; 754 void _thr_signal_init(void) __hidden; 755 void _thr_signal_deinit(void) __hidden; 756 int _thr_send_sig(struct pthread *, int sig) __hidden; 757 void _thr_list_init(void) __hidden; 758 void _thr_hash_add(struct pthread *) __hidden; 759 void _thr_hash_remove(struct pthread *) __hidden; 760 struct pthread *_thr_hash_find(struct pthread *) __hidden; 761 void _thr_link(struct pthread *, struct pthread *) __hidden; 762 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 763 void _thr_assert_lock_level(void) __hidden __dead2; 764 void _thr_ast(struct pthread *) __hidden; 765 void _thr_once_init(void) __hidden; 766 void _thr_report_creation(struct pthread *curthread, 767 struct pthread *newthread) __hidden; 768 void _thr_report_death(struct pthread *curthread) __hidden; 769 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 770 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 771 void _thr_signal_prefork(void) __hidden; 772 void _thr_signal_postfork(void) __hidden; 773 void _thr_signal_postfork_child(void) __hidden; 774 void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 775 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 776 struct sched_param *param) __hidden; 777 int _schedparam_to_rtp(int policy, const struct sched_param *param, 778 struct rtprio *rtp) __hidden; 779 void _thread_bp_create(void); 780 void _thread_bp_death(void); 781 int _sched_yield(void); 782 783 void _pthread_cleanup_push(void (*)(void *), void *); 784 void _pthread_cleanup_pop(int); 785 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 786 void _pthread_cancel_enter(int maycancel); 787 void _pthread_cancel_leave(int maycancel); 788 789 /* #include <fcntl.h> */ 790 #ifdef _SYS_FCNTL_H_ 791 int __sys_fcntl(int, int, ...); 792 int __sys_open(const char *, int, ...); 793 int __sys_openat(int, const char *, int, ...); 794 #endif 795 796 /* #include <signal.h> */ 797 #ifdef _SIGNAL_H_ 798 int __sys_kill(pid_t, int); 799 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 800 int __sys_sigpending(sigset_t *); 801 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 802 int __sys_sigsuspend(const sigset_t *); 803 int __sys_sigreturn(const ucontext_t *); 804 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 805 int __sys_sigwait(const sigset_t *, int *); 806 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 807 const struct timespec *); 808 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 809 #endif 810 811 /* #include <time.h> */ 812 #ifdef _TIME_H_ 813 int __sys_nanosleep(const struct timespec *, struct timespec *); 814 #endif 815 816 /* #include <sys/ucontext.h> */ 817 #ifdef _SYS_UCONTEXT_H_ 818 int __sys_setcontext(const ucontext_t *ucp); 819 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 820 #endif 821 822 /* #include <unistd.h> */ 823 #ifdef _UNISTD_H_ 824 int __sys_close(int); 825 int __sys_fork(void); 826 pid_t __sys_getpid(void); 827 ssize_t __sys_read(int, void *, size_t); 828 ssize_t __sys_write(int, const void *, size_t); 829 void __sys_exit(int); 830 #endif 831 832 int _umtx_op_err(void *, int op, u_long, void *, void *) __hidden; 833 834 static inline int 835 _thr_isthreaded(void) 836 { 837 return (__isthreaded != 0); 838 } 839 840 static inline int 841 _thr_is_inited(void) 842 { 843 return (_thr_initial != NULL); 844 } 845 846 static inline void 847 _thr_check_init(void) 848 { 849 if (_thr_initial == NULL) 850 _libpthread_init(NULL); 851 } 852 853 struct wake_addr *_thr_alloc_wake_addr(void); 854 void _thr_release_wake_addr(struct wake_addr *); 855 int _thr_sleep(struct pthread *, int, const struct timespec *); 856 857 void _thr_wake_addr_init(void) __hidden; 858 859 static inline void 860 _thr_clear_wake(struct pthread *td) 861 { 862 td->wake_addr->value = 0; 863 } 864 865 static inline int 866 _thr_is_woken(struct pthread *td) 867 { 868 return td->wake_addr->value != 0; 869 } 870 871 static inline void 872 _thr_set_wake(unsigned int *waddr) 873 { 874 *waddr = 1; 875 _thr_umtx_wake(waddr, INT_MAX, 0); 876 } 877 878 void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 879 880 static inline struct pthread * 881 _sleepq_first(struct sleepqueue *sq) 882 { 883 return TAILQ_FIRST(&sq->sq_blocked); 884 } 885 886 void _sleepq_init(void) __hidden; 887 struct sleepqueue *_sleepq_alloc(void) __hidden; 888 void _sleepq_free(struct sleepqueue *) __hidden; 889 void _sleepq_lock(void *) __hidden; 890 void _sleepq_unlock(void *) __hidden; 891 struct sleepqueue *_sleepq_lookup(void *) __hidden; 892 void _sleepq_add(void *, struct pthread *) __hidden; 893 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 894 void _sleepq_drop(struct sleepqueue *, 895 void (*cb)(struct pthread *, void *arg), void *) __hidden; 896 897 struct dl_phdr_info; 898 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 899 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 900 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 901 void _thr_stack_fix_protection(struct pthread *thrd); 902 903 __END_DECLS 904 905 #endif /* !_THR_PRIVATE_H */ 906