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 78typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 79typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 80TAILQ_HEAD(mutex_queue, pthread_mutex); 81 82/* Signal to do cancellation */ 83#define SIGCANCEL SIGTHR 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 145struct 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 161struct 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 170struct 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 177struct pthread_cond_attr { 178 int c_pshared; 179 int c_clockid; 180}; 181 182struct 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 190struct pthread_barrierattr { 191 int pshared; 192}; 193 194struct 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 */ 208struct 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 230struct pthread_atfork { 231 TAILQ_ENTRY(pthread_atfork) qe; 232 void (*prepare)(void); 233 void (*parent)(void); 234 void (*child)(void); 235}; 236 237struct 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 253struct wake_addr { 254 struct wake_addr *link; 255 unsigned int value; 256 char pad[12]; 257}; 258 259struct 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 302struct pthread_prio { 303 int pri_min; 304 int pri_max; 305 int pri_default; 306}; 307 308struct pthread_rwlockattr { 309 int pshared; 310}; 311 312struct pthread_rwlock { 313 struct urwlock lock; 314 struct pthread *owner; 315}; 316 317/* 318 * Thread states. 319 */ 320enum pthread_state { 321 PS_RUNNING, 322 PS_DEAD 323}; 324 325struct pthread_specific_elem { 326 const void *data; 327 int seqno; 328}; 329 330struct 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 */ 345struct pthread { 346#define _pthread_startzero tid 347 /* Kernel thread id. */ 348 long tid; 349#define TID_TERMINATED 1 350 351 /* 352 * Lock for accesses to this thread structure. 353 */ 354 struct umutex lock; 355 356 /* Internal condition variable cycle number. */ 357 uint32_t cycle; 358 359 /* How many low level locks the thread held. */ 360 int locklevel; 361 362 /* 363 * Set to non-zero when this thread has entered a critical 364 * region. We allow for recursive entries into critical regions. 365 */ 366 int critical_count; 367 368 /* Signal blocked counter. */ 369 int sigblock; 370 371 /* Queue entry for list of all threads. */ 372 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 373 374 /* Queue entry for GC lists. */ 375 TAILQ_ENTRY(pthread) gcle; 376 377 /* Hash queue entry. */ 378 LIST_ENTRY(pthread) hle; 379 380 /* Sleep queue entry */ 381 TAILQ_ENTRY(pthread) wle; 382 383 /* Threads reference count. */ 384 int refcount; 385 386 /* 387 * Thread start routine, argument, stack pointer and thread 388 * attributes. 389 */ 390 void *(*start_routine)(void *); 391 void *arg; 392 struct pthread_attr attr; 393 394#define SHOULD_CANCEL(thr) \ 395 ((thr)->cancel_pending && (thr)->cancel_enable && \ 396 (thr)->no_cancel == 0) 397 398 /* Cancellation is enabled */ 399 int cancel_enable; 400 401 /* Cancellation request is pending */ 402 int cancel_pending; 403 404 /* Thread is at cancellation point */ 405 int cancel_point; 406 407 /* Cancellation is temporarily disabled */ 408 int no_cancel; 409 410 /* Asynchronouse cancellation is enabled */ 411 int cancel_async; 412 413 /* Cancellation is in progress */ 414 int cancelling; 415 416 /* Thread temporary signal mask. */ 417 sigset_t sigmask; 418 419 /* Thread should unblock SIGCANCEL. */ 420 int unblock_sigcancel; 421 422 /* In sigsuspend state */ 423 int in_sigsuspend; 424 425 /* deferred signal info */ 426 siginfo_t deferred_siginfo; 427 428 /* signal mask to restore. */ 429 sigset_t deferred_sigmask; 430 431 /* the sigaction should be used for deferred signal. */ 432 struct sigaction deferred_sigact; 433 434 /* deferred signal delivery is performed, do not reenter. */ 435 int deferred_run; 436 437 /* Force new thread to exit. */ 438 int force_exit; 439 440 /* Thread state: */ 441 enum pthread_state state; 442 443 /* 444 * Error variable used instead of errno. The function __error() 445 * returns a pointer to this. 446 */ 447 int error; 448 449 /* 450 * The joiner is the thread that is joining to this thread. The 451 * join status keeps track of a join operation to another thread. 452 */ 453 struct pthread *joiner; 454 455 /* Miscellaneous flags; only set with scheduling lock held. */ 456 int flags; 457#define THR_FLAGS_PRIVATE 0x0001 458#define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 459#define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 460#define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ 461 462 /* Thread list flags; only set with thread list lock held. */ 463 int tlflags; 464#define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 465#define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 466#define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 467 468 /* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */ 469 struct mutex_queue mutexq; 470 471 /* Queue of all owned PRIO_PROTECT mutexes. */ 472 struct mutex_queue pp_mutexq; 473 474 void *ret; 475 struct pthread_specific_elem *specific; 476 int specific_data_count; 477 478 /* Number rwlocks rdlocks held. */ 479 int rdlock_count; 480 481 /* 482 * Current locks bitmap for rtld. */ 483 int rtld_bits; 484 485 /* Thread control block */ 486 struct tcb *tcb; 487 488 /* Cleanup handlers Link List */ 489 struct pthread_cleanup *cleanup; 490 491#ifdef _PTHREAD_FORCED_UNWIND 492 struct _Unwind_Exception ex; 493 void *unwind_stackend; 494 int unwind_disabled; 495#endif 496 497 /* 498 * Magic value to help recognize a valid thread structure 499 * from an invalid one: 500 */ 501#define THR_MAGIC ((u_int32_t) 0xd09ba115) 502 u_int32_t magic; 503 504 /* Enable event reporting */ 505 int report_events; 506 507 /* Event mask */ 508 int event_mask; 509 510 /* Event */ 511 td_event_msg_t event_buf; 512 513 /* Wait channel */ 514 void *wchan; 515 516 /* Referenced mutex. */ 517 struct pthread_mutex *mutex_obj; 518 519 /* Thread will sleep. */ 520 int will_sleep; 521 522 /* Number of threads deferred. */ 523 int nwaiter_defer; 524 525 /* Deferred threads from pthread_cond_signal. */ 526 unsigned int *defer_waiters[MAX_DEFER_WAITERS]; 527#define _pthread_endzero wake_addr 528 529 struct wake_addr *wake_addr; 530#define WAKE_ADDR(td) ((td)->wake_addr) 531 532 /* Sleep queue */ 533 struct sleepqueue *sleepqueue; 534 535}; 536 537#define THR_SHOULD_GC(thrd) \ 538 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 539 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 540 541#define THR_IN_CRITICAL(thrd) \ 542 (((thrd)->locklevel > 0) || \ 543 ((thrd)->critical_count > 0)) 544 545#define THR_CRITICAL_ENTER(thrd) \ 546 (thrd)->critical_count++ 547 548#define THR_CRITICAL_LEAVE(thrd) \ 549 do { \ 550 (thrd)->critical_count--; \ 551 _thr_ast(thrd); \ 552 } while (0) 553 554#define THR_UMUTEX_TRYLOCK(thrd, lck) \ 555 _thr_umutex_trylock((lck), TID(thrd)) 556 557#define THR_UMUTEX_LOCK(thrd, lck) \ 558 _thr_umutex_lock((lck), TID(thrd)) 559 560#define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 561 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 562 563#define THR_UMUTEX_UNLOCK(thrd, lck) \ 564 _thr_umutex_unlock((lck), TID(thrd)) 565 566#define THR_LOCK_ACQUIRE(thrd, lck) \ 567do { \ 568 (thrd)->locklevel++; \ 569 _thr_umutex_lock(lck, TID(thrd)); \ 570} while (0) 571 572#define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 573do { \ 574 (thrd)->locklevel++; \ 575 _thr_umutex_lock_spin(lck, TID(thrd)); \ 576} while (0) 577 578#ifdef _PTHREADS_INVARIANTS 579#define THR_ASSERT_LOCKLEVEL(thrd) \ 580do { \ 581 if (__predict_false((thrd)->locklevel <= 0)) \ 582 _thr_assert_lock_level(); \ 583} while (0) 584#else 585#define THR_ASSERT_LOCKLEVEL(thrd) 586#endif 587 588#define THR_LOCK_RELEASE(thrd, lck) \ 589do { \ 590 THR_ASSERT_LOCKLEVEL(thrd); \ 591 _thr_umutex_unlock((lck), TID(thrd)); \ 592 (thrd)->locklevel--; \ 593 _thr_ast(thrd); \ 594} while (0) 595 596#define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 597#define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 598#define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 599#define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 600 601#define THREAD_LIST_RDLOCK(curthrd) \ 602do { \ 603 (curthrd)->locklevel++; \ 604 _thr_rwl_rdlock(&_thr_list_lock); \ 605} while (0) 606 607#define THREAD_LIST_WRLOCK(curthrd) \ 608do { \ 609 (curthrd)->locklevel++; \ 610 _thr_rwl_wrlock(&_thr_list_lock); \ 611} while (0) 612 613#define THREAD_LIST_UNLOCK(curthrd) \ 614do { \ 615 _thr_rwl_unlock(&_thr_list_lock); \ 616 (curthrd)->locklevel--; \ 617 _thr_ast(curthrd); \ 618} while (0) 619 620/* 621 * Macros to insert/remove threads to the all thread list and 622 * the gc list. 623 */ 624#define THR_LIST_ADD(thrd) do { \ 625 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 626 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 627 _thr_hash_add(thrd); \ 628 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 629 } \ 630} while (0) 631#define THR_LIST_REMOVE(thrd) do { \ 632 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 633 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 634 _thr_hash_remove(thrd); \ 635 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 636 } \ 637} while (0) 638#define THR_GCLIST_ADD(thrd) do { \ 639 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 640 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 641 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 642 _gc_count++; \ 643 } \ 644} while (0) 645#define THR_GCLIST_REMOVE(thrd) do { \ 646 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 647 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 648 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 649 _gc_count--; \ 650 } \ 651} while (0) 652 653#define THR_REF_ADD(curthread, pthread) { \ 654 THR_CRITICAL_ENTER(curthread); \ 655 pthread->refcount++; \ 656} while (0) 657 658#define THR_REF_DEL(curthread, pthread) { \ 659 pthread->refcount--; \ 660 THR_CRITICAL_LEAVE(curthread); \ 661} while (0) 662 663#define GC_NEEDED() (_gc_count >= 5) 664 665#define SHOULD_REPORT_EVENT(curthr, e) \ 666 (curthr->report_events && \ 667 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 668 669extern int __isthreaded; 670 671/* 672 * Global variables for the pthread kernel. 673 */ 674 675extern char *_usrstack __hidden; 676extern struct pthread *_thr_initial __hidden; 677 678/* For debugger */ 679extern int _libthr_debug; 680extern int _thread_event_mask; 681extern struct pthread *_thread_last_event; 682 683/* List of all threads: */ 684extern pthreadlist _thread_list; 685 686/* List of threads needing GC: */ 687extern pthreadlist _thread_gc_list __hidden; 688 689extern int _thread_active_threads; 690extern atfork_head _thr_atfork_list __hidden; 691extern struct urwlock _thr_atfork_lock __hidden; 692 693/* Default thread attributes: */ 694extern struct pthread_attr _pthread_attr_default __hidden; 695 696/* Default mutex attributes: */ 697extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 698extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 699 700/* Default condition variable attributes: */ 701extern struct pthread_cond_attr _pthread_condattr_default __hidden; 702 703extern struct pthread_prio _thr_priorities[] __hidden; 704 705extern pid_t _thr_pid __hidden; 706extern int _thr_is_smp __hidden; 707 708extern size_t _thr_guard_default __hidden; 709extern size_t _thr_stack_default __hidden; 710extern size_t _thr_stack_initial __hidden; 711extern int _thr_page_size __hidden; 712extern int _thr_spinloops __hidden; 713extern int _thr_yieldloops __hidden; 714 715/* Garbage thread count. */ 716extern int _gc_count __hidden; 717 718extern struct umutex _mutex_static_lock __hidden; 719extern struct umutex _cond_static_lock __hidden; 720extern struct umutex _rwlock_static_lock __hidden; 721extern struct umutex _keytable_lock __hidden; 722extern struct urwlock _thr_list_lock __hidden; 723extern struct umutex _thr_event_lock __hidden; 724 725/* 726 * Function prototype definitions. 727 */ 728__BEGIN_DECLS 729int _thr_setthreaded(int) __hidden; 730int _mutex_cv_lock(struct pthread_mutex *, int count) __hidden; 731int _mutex_cv_unlock(struct pthread_mutex *, int *count) __hidden; 732int _mutex_cv_attach(struct pthread_mutex *, int count) __hidden; 733int _mutex_cv_detach(struct pthread_mutex *, int *count) __hidden; 734int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 735int _mutex_reinit(pthread_mutex_t *) __hidden; 736void _mutex_fork(struct pthread *curthread) __hidden; 737void _libpthread_init(struct pthread *) __hidden; 738struct pthread *_thr_alloc(struct pthread *) __hidden; 739void _thread_exit(const char *, int, const char *) __hidden __dead2; 740int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 741void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 742void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 743int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 744void _thr_rtld_init(void) __hidden; 745void _thr_rtld_fini(void) __hidden; 746void _thr_rtld_postfork_child(void) __hidden; 747int _thr_stack_alloc(struct pthread_attr *) __hidden; 748void _thr_stack_free(struct pthread_attr *) __hidden; 749void _thr_free(struct pthread *, struct pthread *) __hidden; 750void _thr_gc(struct pthread *) __hidden; 751void _thread_cleanupspecific(void) __hidden; 752void _thread_printf(int, const char *, ...) __hidden; 753void _thr_spinlock_init(void) __hidden; 754void _thr_cancel_enter(struct pthread *) __hidden; 755void _thr_cancel_enter2(struct pthread *, int) __hidden; 756void _thr_cancel_leave(struct pthread *, int) __hidden; 757void _thr_testcancel(struct pthread *) __hidden; 758void _thr_signal_block(struct pthread *) __hidden; 759void _thr_signal_unblock(struct pthread *) __hidden; 760void _thr_signal_init(void) __hidden; 761void _thr_signal_deinit(void) __hidden; 762int _thr_send_sig(struct pthread *, int sig) __hidden; 763void _thr_list_init(void) __hidden; 764void _thr_hash_add(struct pthread *) __hidden; 765void _thr_hash_remove(struct pthread *) __hidden; 766struct pthread *_thr_hash_find(struct pthread *) __hidden; 767void _thr_link(struct pthread *, struct pthread *) __hidden; 768void _thr_unlink(struct pthread *, struct pthread *) __hidden; 769void _thr_assert_lock_level(void) __hidden __dead2; 770void _thr_ast(struct pthread *) __hidden; 771void _thr_once_init(void) __hidden; 772void _thr_report_creation(struct pthread *curthread, 773 struct pthread *newthread) __hidden; 774void _thr_report_death(struct pthread *curthread) __hidden; 775int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 776int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 777void _thr_signal_prefork(void) __hidden; 778void _thr_signal_postfork(void) __hidden; 779void _thr_signal_postfork_child(void) __hidden; 780void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 781int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 782 struct sched_param *param) __hidden; 783int _schedparam_to_rtp(int policy, const struct sched_param *param, 784 struct rtprio *rtp) __hidden; 785void _thread_bp_create(void); 786void _thread_bp_death(void); 787int _sched_yield(void); 788 789void _pthread_cleanup_push(void (*)(void *), void *); 790void _pthread_cleanup_pop(int); 791void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 792void _pthread_cancel_enter(int maycancel); 793void _pthread_cancel_leave(int maycancel); 794 795/* #include <fcntl.h> */ 796#ifdef _SYS_FCNTL_H_ 797int __sys_fcntl(int, int, ...); 798int __sys_open(const char *, int, ...); 799int __sys_openat(int, const char *, int, ...); 800#endif 801 802/* #include <signal.h> */ 803#ifdef _SIGNAL_H_ 804int __sys_kill(pid_t, int); 805int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 806int __sys_sigpending(sigset_t *); 807int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 808int __sys_sigsuspend(const sigset_t *); 809int __sys_sigreturn(const ucontext_t *); 810int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 811int __sys_sigwait(const sigset_t *, int *); 812int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 813 const struct timespec *); 814int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 815#endif 816 817/* #include <time.h> */ 818#ifdef _TIME_H_ 819int __sys_nanosleep(const struct timespec *, struct timespec *); 820#endif 821 822/* #include <sys/ucontext.h> */ 823#ifdef _SYS_UCONTEXT_H_ 824int __sys_setcontext(const ucontext_t *ucp); 825int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 826#endif 827 828/* #include <unistd.h> */ 829#ifdef _UNISTD_H_ 830int __sys_close(int); 831int __sys_fork(void); 832pid_t __sys_getpid(void); 833ssize_t __sys_read(int, void *, size_t); 834ssize_t __sys_write(int, const void *, size_t); 835void __sys_exit(int); 836#endif 837 838static inline int 839_thr_isthreaded(void) 840{ 841 return (__isthreaded != 0); 842} 843 844static inline int 845_thr_is_inited(void) 846{ 847 return (_thr_initial != NULL); 848} 849 850static inline void 851_thr_check_init(void) 852{ 853 if (_thr_initial == NULL) 854 _libpthread_init(NULL); 855} 856 857struct wake_addr *_thr_alloc_wake_addr(void); 858void _thr_release_wake_addr(struct wake_addr *); 859int _thr_sleep(struct pthread *, int, const struct timespec *); 860 861void _thr_wake_addr_init(void) __hidden; 862 863static inline void 864_thr_clear_wake(struct pthread *td) 865{ 866 td->wake_addr->value = 0; 867} 868 869static inline int 870_thr_is_woken(struct pthread *td) 871{ 872 return td->wake_addr->value != 0; 873} 874 875static inline void 876_thr_set_wake(unsigned int *waddr) 877{ 878 *waddr = 1; 879 _thr_umtx_wake(waddr, INT_MAX, 0); 880} 881 882void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 883 884static inline struct pthread * 885_sleepq_first(struct sleepqueue *sq) 886{ 887 return TAILQ_FIRST(&sq->sq_blocked); 888} 889 890void _sleepq_init(void) __hidden; 891struct sleepqueue *_sleepq_alloc(void) __hidden; 892void _sleepq_free(struct sleepqueue *) __hidden; 893void _sleepq_lock(void *) __hidden; 894void _sleepq_unlock(void *) __hidden; 895struct sleepqueue *_sleepq_lookup(void *) __hidden; 896void _sleepq_add(void *, struct pthread *) __hidden; 897int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 898void _sleepq_drop(struct sleepqueue *, 899 void (*cb)(struct pthread *, void *arg), void *) __hidden; 900 901struct dl_phdr_info; 902void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 903void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 904void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 905void _thr_stack_fix_protection(struct pthread *thrd); 906 907__END_DECLS 908 909#endif /* !_THR_PRIVATE_H */ 910