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 #ifndef __hidden 56 #define __hidden __attribute__((visibility("hidden"))) 57 #endif 58 59 #include "pthread_md.h" 60 #include "thr_umtx.h" 61 #include "thread_db.h" 62 63 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 64 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 65 TAILQ_HEAD(mutex_queue, pthread_mutex); 66 67 /* Signal to do cancellation */ 68 #define SIGCANCEL 32 69 70 /* 71 * Kernel fatal error handler macro. 72 */ 73 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 74 75 /* Output debug messages like this: */ 76 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 77 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) 78 79 #ifdef _PTHREADS_INVARIANTS 80 #define THR_ASSERT(cond, msg) do { \ 81 if (__predict_false(!(cond))) \ 82 PANIC(msg); \ 83 } while (0) 84 #else 85 #define THR_ASSERT(cond, msg) 86 #endif 87 88 #ifdef PIC 89 # define STATIC_LIB_REQUIRE(name) 90 #else 91 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 92 #endif 93 94 #define TIMESPEC_ADD(dst, src, val) \ 95 do { \ 96 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 97 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 98 if ((dst)->tv_nsec >= 1000000000) { \ 99 (dst)->tv_sec++; \ 100 (dst)->tv_nsec -= 1000000000; \ 101 } \ 102 } while (0) 103 104 #define TIMESPEC_SUB(dst, src, val) \ 105 do { \ 106 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 107 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 108 if ((dst)->tv_nsec < 0) { \ 109 (dst)->tv_sec--; \ 110 (dst)->tv_nsec += 1000000000; \ 111 } \ 112 } while (0) 113 114 struct pthread_mutex { 115 /* 116 * Lock for accesses to this structure. 117 */ 118 struct umutex m_lock; 119 enum pthread_mutextype m_type; 120 struct pthread *m_owner; 121 int m_flags; 122 int m_count; 123 int m_refcount; 124 int m_spinloops; 125 int m_yieldloops; 126 /* 127 * Link for all mutexes a thread currently owns. 128 */ 129 TAILQ_ENTRY(pthread_mutex) m_qe; 130 }; 131 132 /* 133 * Flags for mutexes. 134 */ 135 #define MUTEX_FLAGS_PRIVATE 0x01 136 #define MUTEX_FLAGS_INITED 0x02 137 #define MUTEX_FLAGS_BUSY 0x04 138 139 struct pthread_mutex_attr { 140 enum pthread_mutextype m_type; 141 int m_protocol; 142 int m_ceiling; 143 int m_flags; 144 }; 145 146 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 147 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 148 149 struct pthread_cond { 150 struct umutex c_lock; 151 struct ucond c_kerncv; 152 int c_pshared; 153 int c_clockid; 154 }; 155 156 struct pthread_cond_attr { 157 int c_pshared; 158 int c_clockid; 159 }; 160 161 struct pthread_barrier { 162 struct umutex b_lock; 163 struct ucond b_cv; 164 volatile int64_t b_cycle; 165 volatile int b_count; 166 volatile int b_waiters; 167 }; 168 169 struct pthread_barrierattr { 170 int pshared; 171 }; 172 173 struct pthread_spinlock { 174 struct umutex s_lock; 175 }; 176 177 /* 178 * Flags for condition variables. 179 */ 180 #define COND_FLAGS_PRIVATE 0x01 181 #define COND_FLAGS_INITED 0x02 182 #define COND_FLAGS_BUSY 0x04 183 184 /* 185 * Cleanup definitions. 186 */ 187 struct pthread_cleanup { 188 struct pthread_cleanup *next; 189 void (*routine)(void *args); 190 void *routine_arg; 191 int onstack; 192 }; 193 194 #define THR_CLEANUP_PUSH(td, func, arg) { \ 195 struct pthread_cleanup __cup; \ 196 \ 197 __cup.routine = func; \ 198 __cup.routine_arg = arg; \ 199 __cup.onstack = 1; \ 200 __cup.next = (td)->cleanup; \ 201 (td)->cleanup = &__cup; 202 203 #define THR_CLEANUP_POP(td, exec) \ 204 (td)->cleanup = __cup.next; \ 205 if ((exec) != 0) \ 206 __cup.routine(__cup.routine_arg); \ 207 } 208 209 struct pthread_atfork { 210 TAILQ_ENTRY(pthread_atfork) qe; 211 void (*prepare)(void); 212 void (*parent)(void); 213 void (*child)(void); 214 }; 215 216 struct pthread_attr { 217 int sched_policy; 218 int sched_inherit; 219 int prio; 220 int suspend; 221 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 222 int flags; 223 void *stackaddr_attr; 224 size_t stacksize_attr; 225 size_t guardsize_attr; 226 cpuset_t *cpuset; 227 size_t cpusetsize; 228 }; 229 230 /* 231 * Thread creation state attributes. 232 */ 233 #define THR_CREATE_RUNNING 0 234 #define THR_CREATE_SUSPENDED 1 235 236 /* 237 * Miscellaneous definitions. 238 */ 239 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 240 241 /* 242 * Maximum size of initial thread's stack. This perhaps deserves to be larger 243 * than the stacks of other threads, since many applications are likely to run 244 * almost entirely on this stack. 245 */ 246 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 247 248 /* 249 * Define priorities returned by kernel. 250 */ 251 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 252 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 253 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 254 255 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 256 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 257 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 258 259 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 260 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 261 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 262 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 263 264 struct pthread_prio { 265 int pri_min; 266 int pri_max; 267 int pri_default; 268 }; 269 270 struct pthread_rwlockattr { 271 int pshared; 272 }; 273 274 struct pthread_rwlock { 275 struct urwlock lock; 276 struct pthread *owner; 277 }; 278 279 /* 280 * Thread states. 281 */ 282 enum pthread_state { 283 PS_RUNNING, 284 PS_DEAD 285 }; 286 287 struct pthread_specific_elem { 288 const void *data; 289 int seqno; 290 }; 291 292 struct pthread_key { 293 volatile int allocated; 294 int seqno; 295 void (*destructor)(void *); 296 }; 297 298 /* 299 * lwpid_t is 32bit but kernel thr API exports tid as long type 300 * in very earily date. 301 */ 302 #define TID(thread) ((uint32_t) ((thread)->tid)) 303 304 /* 305 * Thread structure. 306 */ 307 struct pthread { 308 /* Kernel thread id. */ 309 long tid; 310 #define TID_TERMINATED 1 311 312 /* 313 * Lock for accesses to this thread structure. 314 */ 315 struct umutex lock; 316 317 /* Internal condition variable cycle number. */ 318 long cycle; 319 320 /* How many low level locks the thread held. */ 321 int locklevel; 322 323 /* 324 * Set to non-zero when this thread has entered a critical 325 * region. We allow for recursive entries into critical regions. 326 */ 327 int critical_count; 328 329 /* Signal blocked counter. */ 330 int sigblock; 331 332 /* Queue entry for list of all threads. */ 333 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 334 335 /* Queue entry for GC lists. */ 336 TAILQ_ENTRY(pthread) gcle; 337 338 /* Hash queue entry. */ 339 LIST_ENTRY(pthread) hle; 340 341 /* Threads reference count. */ 342 int refcount; 343 344 /* 345 * Thread start routine, argument, stack pointer and thread 346 * attributes. 347 */ 348 void *(*start_routine)(void *); 349 void *arg; 350 struct pthread_attr attr; 351 352 #define SHOULD_CANCEL(thr) \ 353 ((thr)->cancel_pending && \ 354 ((thr)->cancel_point || (thr)->cancel_async) && \ 355 (thr)->cancel_enable && (thr)->cancelling == 0) 356 357 /* Cancellation is enabled */ 358 int cancel_enable; 359 360 /* Cancellation request is pending */ 361 int cancel_pending; 362 363 /* Thread is at cancellation point */ 364 int cancel_point; 365 366 /* Cancellation should be synchoronized */ 367 int cancel_defer; 368 369 /* Asynchronouse cancellation is enabled */ 370 int cancel_async; 371 372 /* Cancellation is in progress */ 373 int cancelling; 374 375 /* Thread temporary signal mask. */ 376 sigset_t sigmask; 377 378 /* Thread is in SIGCANCEL handler. */ 379 int in_sigcancel_handler; 380 381 /* New thread should unblock SIGCANCEL. */ 382 int unblock_sigcancel; 383 384 /* Force new thread to exit. */ 385 int force_exit; 386 387 /* Thread state: */ 388 enum pthread_state state; 389 390 /* 391 * Error variable used instead of errno. The function __error() 392 * returns a pointer to this. 393 */ 394 int error; 395 396 /* 397 * The joiner is the thread that is joining to this thread. The 398 * join status keeps track of a join operation to another thread. 399 */ 400 struct pthread *joiner; 401 402 /* Miscellaneous flags; only set with scheduling lock held. */ 403 int flags; 404 #define THR_FLAGS_PRIVATE 0x0001 405 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 406 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 407 408 /* Thread list flags; only set with thread list lock held. */ 409 int tlflags; 410 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 411 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 412 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 413 #define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 414 415 /* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */ 416 struct mutex_queue mutexq; 417 418 /* Queue of all owned PRIO_PROTECT mutexes. */ 419 struct mutex_queue pp_mutexq; 420 421 void *ret; 422 struct pthread_specific_elem *specific; 423 int specific_data_count; 424 425 /* Number rwlocks rdlocks held. */ 426 int rdlock_count; 427 428 /* 429 * Current locks bitmap for rtld. */ 430 int rtld_bits; 431 432 /* Thread control block */ 433 struct tcb *tcb; 434 435 /* Cleanup handlers Link List */ 436 struct pthread_cleanup *cleanup; 437 438 /* 439 * Magic value to help recognize a valid thread structure 440 * from an invalid one: 441 */ 442 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 443 u_int32_t magic; 444 445 /* Enable event reporting */ 446 int report_events; 447 448 /* Event mask */ 449 int event_mask; 450 451 /* Event */ 452 td_event_msg_t event_buf; 453 }; 454 455 #define THR_IN_CRITICAL(thrd) \ 456 (((thrd)->locklevel > 0) || \ 457 ((thrd)->critical_count > 0)) 458 459 #define THR_CRITICAL_ENTER(thrd) \ 460 (thrd)->critical_count++ 461 462 #define THR_CRITICAL_LEAVE(thrd) \ 463 do { \ 464 (thrd)->critical_count--; \ 465 _thr_ast(thrd); \ 466 } while (0) 467 468 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 469 _thr_umutex_trylock((lck), TID(thrd)) 470 471 #define THR_UMUTEX_LOCK(thrd, lck) \ 472 _thr_umutex_lock((lck), TID(thrd)) 473 474 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 475 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 476 477 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 478 _thr_umutex_unlock((lck), TID(thrd)) 479 480 #define THR_LOCK_ACQUIRE(thrd, lck) \ 481 do { \ 482 (thrd)->locklevel++; \ 483 _thr_umutex_lock(lck, TID(thrd)); \ 484 } while (0) 485 486 #ifdef _PTHREADS_INVARIANTS 487 #define THR_ASSERT_LOCKLEVEL(thrd) \ 488 do { \ 489 if (__predict_false((thrd)->locklevel <= 0)) \ 490 _thr_assert_lock_level(); \ 491 } while (0) 492 #else 493 #define THR_ASSERT_LOCKLEVEL(thrd) 494 #endif 495 496 #define THR_LOCK_RELEASE(thrd, lck) \ 497 do { \ 498 THR_ASSERT_LOCKLEVEL(thrd); \ 499 _thr_umutex_unlock((lck), TID(thrd)); \ 500 (thrd)->locklevel--; \ 501 _thr_ast(thrd); \ 502 } while (0) 503 504 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 505 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 506 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 507 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 508 509 #define THREAD_LIST_LOCK(curthrd) \ 510 do { \ 511 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 512 } while (0) 513 514 #define THREAD_LIST_UNLOCK(curthrd) \ 515 do { \ 516 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 517 } while (0) 518 519 /* 520 * Macros to insert/remove threads to the all thread list and 521 * the gc list. 522 */ 523 #define THR_LIST_ADD(thrd) do { \ 524 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 525 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 526 _thr_hash_add(thrd); \ 527 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 528 } \ 529 } while (0) 530 #define THR_LIST_REMOVE(thrd) do { \ 531 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 532 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 533 _thr_hash_remove(thrd); \ 534 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 535 } \ 536 } while (0) 537 #define THR_GCLIST_ADD(thrd) do { \ 538 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 539 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 540 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 541 _gc_count++; \ 542 } \ 543 } while (0) 544 #define THR_GCLIST_REMOVE(thrd) do { \ 545 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 546 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 547 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 548 _gc_count--; \ 549 } \ 550 } while (0) 551 552 #define GC_NEEDED() (_gc_count >= 5) 553 554 #define SHOULD_REPORT_EVENT(curthr, e) \ 555 (curthr->report_events && \ 556 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 557 558 extern int __isthreaded; 559 560 /* 561 * Global variables for the pthread kernel. 562 */ 563 564 extern char *_usrstack __hidden; 565 extern struct pthread *_thr_initial __hidden; 566 567 /* For debugger */ 568 extern int _libthr_debug; 569 extern int _thread_event_mask; 570 extern struct pthread *_thread_last_event; 571 572 /* List of all threads: */ 573 extern pthreadlist _thread_list; 574 575 /* List of threads needing GC: */ 576 extern pthreadlist _thread_gc_list __hidden; 577 578 extern int _thread_active_threads; 579 extern atfork_head _thr_atfork_list __hidden; 580 extern struct umutex _thr_atfork_lock __hidden; 581 582 /* Default thread attributes: */ 583 extern struct pthread_attr _pthread_attr_default __hidden; 584 585 /* Default mutex attributes: */ 586 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 587 588 /* Default condition variable attributes: */ 589 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 590 591 extern struct pthread_prio _thr_priorities[] __hidden; 592 593 extern pid_t _thr_pid __hidden; 594 extern int _thr_is_smp __hidden; 595 596 extern size_t _thr_guard_default __hidden; 597 extern size_t _thr_stack_default __hidden; 598 extern size_t _thr_stack_initial __hidden; 599 extern int _thr_page_size __hidden; 600 extern int _thr_spinloops __hidden; 601 extern int _thr_yieldloops __hidden; 602 603 /* Garbage thread count. */ 604 extern int _gc_count __hidden; 605 606 extern struct umutex _mutex_static_lock __hidden; 607 extern struct umutex _cond_static_lock __hidden; 608 extern struct umutex _rwlock_static_lock __hidden; 609 extern struct umutex _keytable_lock __hidden; 610 extern struct umutex _thr_list_lock __hidden; 611 extern struct umutex _thr_event_lock __hidden; 612 613 /* 614 * Function prototype definitions. 615 */ 616 __BEGIN_DECLS 617 int _thr_setthreaded(int) __hidden; 618 int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 619 int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 620 int _mutex_reinit(pthread_mutex_t *) __hidden; 621 void _mutex_fork(struct pthread *curthread) __hidden; 622 void _mutex_unlock_private(struct pthread *) __hidden; 623 void _libpthread_init(struct pthread *) __hidden; 624 struct pthread *_thr_alloc(struct pthread *) __hidden; 625 void _thread_exit(const char *, int, const char *) __hidden __dead2; 626 void _thr_exit_cleanup(void) __hidden; 627 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 628 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 629 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 630 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 631 void _thr_rtld_init(void) __hidden; 632 void _thr_rtld_fini(void) __hidden; 633 int _thr_stack_alloc(struct pthread_attr *) __hidden; 634 void _thr_stack_free(struct pthread_attr *) __hidden; 635 void _thr_free(struct pthread *, struct pthread *) __hidden; 636 void _thr_gc(struct pthread *) __hidden; 637 void _thread_cleanupspecific(void) __hidden; 638 void _thread_dump_info(void) __hidden; 639 void _thread_printf(int, const char *, ...) __hidden; 640 void _thr_spinlock_init(void) __hidden; 641 void _thr_cancel_enter(struct pthread *) __hidden; 642 void _thr_cancel_leave(struct pthread *) __hidden; 643 void _thr_cancel_enter_defer(struct pthread *) __hidden; 644 void _thr_cancel_leave_defer(struct pthread *, int) __hidden; 645 void _thr_testcancel(struct pthread *) __hidden; 646 void _thr_signal_block(struct pthread *) __hidden; 647 void _thr_signal_unblock(struct pthread *) __hidden; 648 void _thr_signal_init(void) __hidden; 649 void _thr_signal_deinit(void) __hidden; 650 int _thr_send_sig(struct pthread *, int sig) __hidden; 651 void _thr_list_init(void) __hidden; 652 void _thr_hash_add(struct pthread *) __hidden; 653 void _thr_hash_remove(struct pthread *) __hidden; 654 struct pthread *_thr_hash_find(struct pthread *) __hidden; 655 void _thr_link(struct pthread *, struct pthread *) __hidden; 656 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 657 void _thr_suspend_check(struct pthread *) __hidden; 658 void _thr_assert_lock_level(void) __hidden __dead2; 659 void _thr_ast(struct pthread *) __hidden; 660 void _thr_once_init(void) __hidden; 661 void _thr_report_creation(struct pthread *curthread, 662 struct pthread *newthread) __hidden; 663 void _thr_report_death(struct pthread *curthread) __hidden; 664 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 665 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 666 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 667 struct sched_param *param) __hidden; 668 int _schedparam_to_rtp(int policy, const struct sched_param *param, 669 struct rtprio *rtp) __hidden; 670 void _thread_bp_create(void); 671 void _thread_bp_death(void); 672 int _sched_yield(void); 673 674 /* #include <fcntl.h> */ 675 #ifdef _SYS_FCNTL_H_ 676 int __sys_fcntl(int, int, ...); 677 int __sys_open(const char *, int, ...); 678 #endif 679 680 /* #include <signal.h> */ 681 #ifdef _SIGNAL_H_ 682 int __sys_kill(pid_t, int); 683 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 684 int __sys_sigpending(sigset_t *); 685 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 686 int __sys_sigsuspend(const sigset_t *); 687 int __sys_sigreturn(ucontext_t *); 688 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 689 int __sys_sigwait(const sigset_t *, int *); 690 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 691 const struct timespec *); 692 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 693 #endif 694 695 /* #include <time.h> */ 696 #ifdef _TIME_H_ 697 int __sys_nanosleep(const struct timespec *, struct timespec *); 698 #endif 699 700 /* #include <unistd.h> */ 701 #ifdef _UNISTD_H_ 702 int __sys_close(int); 703 int __sys_fork(void); 704 pid_t __sys_getpid(void); 705 ssize_t __sys_read(int, void *, size_t); 706 ssize_t __sys_write(int, const void *, size_t); 707 void __sys_exit(int); 708 #endif 709 710 int _umtx_op_err(void *, int op, u_long, void *, void *) __hidden; 711 712 static inline int 713 _thr_isthreaded(void) 714 { 715 return (__isthreaded != 0); 716 } 717 718 static inline int 719 _thr_is_inited(void) 720 { 721 return (_thr_initial != NULL); 722 } 723 724 static inline void 725 _thr_check_init(void) 726 { 727 if (_thr_initial == NULL) 728 _libpthread_init(NULL); 729 } 730 731 __END_DECLS 732 733 #endif /* !_THR_PRIVATE_H */ 734