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 <machine/atomic.h> 43 #include <errno.h> 44 #include <limits.h> 45 #include <signal.h> 46 #include <stddef.h> 47 #include <stdio.h> 48 #include <unistd.h> 49 #include <ucontext.h> 50 #include <sys/thr.h> 51 #include <pthread.h> 52 53 #ifndef __hidden 54 #define __hidden __attribute__((visibility("hidden"))) 55 #endif 56 57 #include "pthread_md.h" 58 #include "thr_umtx.h" 59 #include "thread_db.h" 60 61 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 62 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 63 64 /* Signal to do cancellation */ 65 #define SIGCANCEL 32 66 67 /* 68 * Kernel fatal error handler macro. 69 */ 70 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 71 72 /* Output debug messages like this: */ 73 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 74 #define stderr_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 75 76 #ifdef _PTHREADS_INVARIANTS 77 #define THR_ASSERT(cond, msg) do { \ 78 if (__predict_false(!(cond))) \ 79 PANIC(msg); \ 80 } while (0) 81 #else 82 #define THR_ASSERT(cond, msg) 83 #endif 84 85 #ifdef PIC 86 # define STATIC_LIB_REQUIRE(name) 87 #else 88 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 89 #endif 90 91 #define TIMESPEC_ADD(dst, src, val) \ 92 do { \ 93 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 94 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 95 if ((dst)->tv_nsec >= 1000000000) { \ 96 (dst)->tv_sec++; \ 97 (dst)->tv_nsec -= 1000000000; \ 98 } \ 99 } while (0) 100 101 #define TIMESPEC_SUB(dst, src, val) \ 102 do { \ 103 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 104 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 105 if ((dst)->tv_nsec < 0) { \ 106 (dst)->tv_sec--; \ 107 (dst)->tv_nsec += 1000000000; \ 108 } \ 109 } while (0) 110 111 struct pthread_mutex { 112 /* 113 * Lock for accesses to this structure. 114 */ 115 volatile umtx_t m_lock; 116 enum pthread_mutextype m_type; 117 int m_protocol; 118 struct pthread *m_owner; 119 int m_flags; 120 int m_count; 121 int m_refcount; 122 123 /* 124 * Used for priority inheritence and protection. 125 * 126 * m_prio - For priority inheritence, the highest active 127 * priority (threads locking the mutex inherit 128 * this priority). For priority protection, the 129 * ceiling priority of this mutex. 130 * m_saved_prio - mutex owners inherited priority before 131 * taking the mutex, restored when the owner 132 * unlocks the mutex. 133 */ 134 int m_prio; 135 int m_saved_prio; 136 137 /* 138 * Link for list of all mutexes a thread currently owns. 139 */ 140 TAILQ_ENTRY(pthread_mutex) m_qe; 141 }; 142 143 /* 144 * Flags for mutexes. 145 */ 146 #define MUTEX_FLAGS_PRIVATE 0x01 147 #define MUTEX_FLAGS_INITED 0x02 148 #define MUTEX_FLAGS_BUSY 0x04 149 150 struct pthread_mutex_attr { 151 enum pthread_mutextype m_type; 152 int m_protocol; 153 int m_ceiling; 154 int m_flags; 155 }; 156 157 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 158 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 159 160 struct pthread_cond { 161 /* 162 * Lock for accesses to this structure. 163 */ 164 volatile umtx_t c_lock; 165 volatile umtx_t c_seqno; 166 volatile int c_waiters; 167 volatile int c_wakeups; 168 int c_pshared; 169 int c_clockid; 170 }; 171 172 struct pthread_cond_attr { 173 int c_pshared; 174 int c_clockid; 175 }; 176 177 struct pthread_barrier { 178 volatile umtx_t b_lock; 179 volatile umtx_t b_cycle; 180 volatile int b_count; 181 volatile int b_waiters; 182 }; 183 184 struct pthread_barrierattr { 185 int pshared; 186 }; 187 188 struct pthread_spinlock { 189 volatile umtx_t s_lock; 190 }; 191 192 /* 193 * Flags for condition variables. 194 */ 195 #define COND_FLAGS_PRIVATE 0x01 196 #define COND_FLAGS_INITED 0x02 197 #define COND_FLAGS_BUSY 0x04 198 199 /* 200 * Cleanup definitions. 201 */ 202 struct pthread_cleanup { 203 struct pthread_cleanup *next; 204 void (*routine)(void *args); 205 void *routine_arg; 206 int onstack; 207 }; 208 209 #define THR_CLEANUP_PUSH(td, func, arg) { \ 210 struct pthread_cleanup __cup; \ 211 \ 212 __cup.routine = func; \ 213 __cup.routine_arg = arg; \ 214 __cup.onstack = 1; \ 215 __cup.next = (td)->cleanup; \ 216 (td)->cleanup = &__cup; 217 218 #define THR_CLEANUP_POP(td, exec) \ 219 (td)->cleanup = __cup.next; \ 220 if ((exec) != 0) \ 221 __cup.routine(__cup.routine_arg); \ 222 } 223 224 struct pthread_atfork { 225 TAILQ_ENTRY(pthread_atfork) qe; 226 void (*prepare)(void); 227 void (*parent)(void); 228 void (*child)(void); 229 }; 230 231 struct pthread_attr { 232 int sched_policy; 233 int sched_inherit; 234 int prio; 235 int suspend; 236 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 237 int flags; 238 void *stackaddr_attr; 239 size_t stacksize_attr; 240 size_t guardsize_attr; 241 }; 242 243 /* 244 * Thread creation state attributes. 245 */ 246 #define THR_CREATE_RUNNING 0 247 #define THR_CREATE_SUSPENDED 1 248 249 /* 250 * Miscellaneous definitions. 251 */ 252 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 253 254 /* 255 * Maximum size of initial thread's stack. This perhaps deserves to be larger 256 * than the stacks of other threads, since many applications are likely to run 257 * almost entirely on this stack. 258 */ 259 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 260 261 /* 262 * Define priorities returned by kernel. 263 */ 264 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 265 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 266 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 267 268 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 269 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 270 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 271 272 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 273 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 274 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 275 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 276 277 struct pthread_prio { 278 int pri_min; 279 int pri_max; 280 int pri_default; 281 }; 282 283 struct pthread_rwlockattr { 284 int pshared; 285 }; 286 287 struct pthread_rwlock { 288 pthread_mutex_t lock; /* monitor lock */ 289 pthread_cond_t read_signal; 290 pthread_cond_t write_signal; 291 int state; /* 0 = idle >0 = # of readers -1 = writer */ 292 int blocked_writers; 293 }; 294 295 /* 296 * Thread states. 297 */ 298 enum pthread_state { 299 PS_RUNNING, 300 PS_DEAD 301 }; 302 303 struct pthread_specific_elem { 304 const void *data; 305 int seqno; 306 }; 307 308 struct pthread_key { 309 volatile int allocated; 310 int seqno; 311 void (*destructor)(void *); 312 }; 313 314 /* 315 * Thread structure. 316 */ 317 struct pthread { 318 /* Kernel thread id. */ 319 long tid; 320 #define TID_TERMINATED 1 321 322 /* 323 * Lock for accesses to this thread structure. 324 */ 325 umtx_t lock; 326 327 /* Internal condition variable cycle number. */ 328 umtx_t cycle; 329 330 /* How many low level locks the thread held. */ 331 int locklevel; 332 333 /* 334 * Set to non-zero when this thread has entered a critical 335 * region. We allow for recursive entries into critical regions. 336 */ 337 int critical_count; 338 339 /* Signal blocked counter. */ 340 int sigblock; 341 342 /* Queue entry for list of all threads. */ 343 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 344 345 /* Queue entry for GC lists. */ 346 TAILQ_ENTRY(pthread) gcle; 347 348 /* Hash queue entry. */ 349 LIST_ENTRY(pthread) hle; 350 351 /* Threads reference count. */ 352 int refcount; 353 354 /* 355 * Thread start routine, argument, stack pointer and thread 356 * attributes. 357 */ 358 void *(*start_routine)(void *); 359 void *arg; 360 struct pthread_attr attr; 361 362 /* 363 * Cancelability flags 364 */ 365 #define THR_CANCEL_DISABLE 0x0001 366 #define THR_CANCEL_EXITING 0x0002 367 #define THR_CANCEL_AT_POINT 0x0004 368 #define THR_CANCEL_NEEDED 0x0008 369 #define SHOULD_CANCEL(val) \ 370 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 371 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED) 372 373 #define SHOULD_ASYNC_CANCEL(val) \ 374 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 375 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \ 376 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) 377 int cancelflags; 378 379 /* Thread temporary signal mask. */ 380 sigset_t sigmask; 381 382 /* Thread state: */ 383 umtx_t state; 384 385 /* 386 * Error variable used instead of errno. The function __error() 387 * returns a pointer to this. 388 */ 389 int error; 390 391 /* 392 * The joiner is the thread that is joining to this thread. The 393 * join status keeps track of a join operation to another thread. 394 */ 395 struct pthread *joiner; 396 397 /* 398 * The current thread can belong to a priority mutex queue. 399 * This is the synchronization queue link. 400 */ 401 TAILQ_ENTRY(pthread) sqe; 402 403 /* Miscellaneous flags; only set with scheduling lock held. */ 404 int flags; 405 #define THR_FLAGS_PRIVATE 0x0001 406 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 407 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 408 409 /* Thread list flags; only set with thread list lock held. */ 410 int tlflags; 411 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 412 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 413 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 414 #define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 415 416 /* Queue of currently owned simple type mutexes. */ 417 TAILQ_HEAD(, pthread_mutex) mutexq; 418 419 void *ret; 420 struct pthread_specific_elem *specific; 421 int specific_data_count; 422 423 /* Number rwlocks rdlocks held. */ 424 int rdlock_count; 425 426 /* 427 * Current locks bitmap for rtld. */ 428 int rtld_bits; 429 430 /* Thread control block */ 431 struct tcb *tcb; 432 433 /* Cleanup handlers Link List */ 434 struct pthread_cleanup *cleanup; 435 436 /* 437 * Magic value to help recognize a valid thread structure 438 * from an invalid one: 439 */ 440 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 441 u_int32_t magic; 442 443 /* Enable event reporting */ 444 int report_events; 445 446 /* Event mask */ 447 int event_mask; 448 449 /* Event */ 450 td_event_msg_t event_buf; 451 }; 452 453 #define THR_IN_CRITICAL(thrd) \ 454 (((thrd)->locklevel > 0) || \ 455 ((thrd)->critical_count > 0)) 456 457 #define THR_CRITICAL_ENTER(thrd) \ 458 (thrd)->critical_count++ 459 460 #define THR_CRITICAL_LEAVE(thrd) \ 461 (thrd)->critical_count--; \ 462 _thr_ast(thrd); 463 464 #define THR_UMTX_TRYLOCK(thrd, lck) \ 465 _thr_umtx_trylock((lck), (thrd)->tid) 466 467 #define THR_UMTX_LOCK(thrd, lck) \ 468 _thr_umtx_lock((lck), (thrd)->tid) 469 470 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 471 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 472 473 #define THR_UMTX_UNLOCK(thrd, lck) \ 474 _thr_umtx_unlock((lck), (thrd)->tid) 475 476 #define THR_LOCK_ACQUIRE(thrd, lck) \ 477 do { \ 478 (thrd)->locklevel++; \ 479 _thr_umtx_lock(lck, (thrd)->tid); \ 480 } while (0) 481 482 #ifdef _PTHREADS_INVARIANTS 483 #define THR_ASSERT_LOCKLEVEL(thrd) \ 484 do { \ 485 if (__predict_false((thrd)->locklevel <= 0)) \ 486 _thr_assert_lock_level(); \ 487 } while (0) 488 #else 489 #define THR_ASSERT_LOCKLEVEL(thrd) 490 #endif 491 492 #define THR_LOCK_RELEASE(thrd, lck) \ 493 do { \ 494 THR_ASSERT_LOCKLEVEL(thrd); \ 495 _thr_umtx_unlock((lck), (thrd)->tid); \ 496 (thrd)->locklevel--; \ 497 _thr_ast(thrd); \ 498 } while (0) 499 500 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 501 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 502 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 503 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 504 505 #define THREAD_LIST_LOCK(curthrd) \ 506 do { \ 507 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 508 } while (0) 509 510 #define THREAD_LIST_UNLOCK(curthrd) \ 511 do { \ 512 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 513 } while (0) 514 515 /* 516 * Macros to insert/remove threads to the all thread list and 517 * the gc list. 518 */ 519 #define THR_LIST_ADD(thrd) do { \ 520 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 521 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 522 _thr_hash_add(thrd); \ 523 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 524 } \ 525 } while (0) 526 #define THR_LIST_REMOVE(thrd) do { \ 527 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 528 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 529 _thr_hash_remove(thrd); \ 530 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 531 } \ 532 } while (0) 533 #define THR_GCLIST_ADD(thrd) do { \ 534 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 535 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 536 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 537 _gc_count++; \ 538 } \ 539 } while (0) 540 #define THR_GCLIST_REMOVE(thrd) do { \ 541 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 542 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 543 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 544 _gc_count--; \ 545 } \ 546 } while (0) 547 548 #define GC_NEEDED() (_gc_count >= 5) 549 550 #define SHOULD_REPORT_EVENT(curthr, e) \ 551 (curthr->report_events && \ 552 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 553 554 extern int __isthreaded; 555 556 /* 557 * Global variables for the pthread kernel. 558 */ 559 560 extern char *_usrstack __hidden; 561 extern struct pthread *_thr_initial __hidden; 562 extern int _thr_scope_system __hidden; 563 564 /* For debugger */ 565 extern int _libthr_debug; 566 extern int _thread_event_mask; 567 extern struct pthread *_thread_last_event; 568 569 /* List of all threads: */ 570 extern pthreadlist _thread_list; 571 572 /* List of threads needing GC: */ 573 extern pthreadlist _thread_gc_list __hidden; 574 575 extern int _thread_active_threads; 576 extern atfork_head _thr_atfork_list __hidden; 577 extern umtx_t _thr_atfork_lock __hidden; 578 579 /* Default thread attributes: */ 580 extern struct pthread_attr _pthread_attr_default __hidden; 581 582 /* Default mutex attributes: */ 583 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 584 585 /* Default condition variable attributes: */ 586 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 587 588 extern struct pthread_prio _thr_priorities[] __hidden; 589 590 extern pid_t _thr_pid __hidden; 591 extern size_t _thr_guard_default __hidden; 592 extern size_t _thr_stack_default __hidden; 593 extern size_t _thr_stack_initial __hidden; 594 extern int _thr_page_size __hidden; 595 /* Garbage thread count. */ 596 extern int _gc_count __hidden; 597 598 extern umtx_t _mutex_static_lock __hidden; 599 extern umtx_t _cond_static_lock __hidden; 600 extern umtx_t _rwlock_static_lock __hidden; 601 extern umtx_t _keytable_lock __hidden; 602 extern umtx_t _thr_list_lock __hidden; 603 extern umtx_t _thr_event_lock __hidden; 604 605 /* 606 * Function prototype definitions. 607 */ 608 __BEGIN_DECLS 609 int _thr_setthreaded(int) __hidden; 610 int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 611 int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 612 int _mutex_reinit(pthread_mutex_t *) __hidden; 613 void _mutex_fork(struct pthread *curthread) __hidden; 614 void _mutex_unlock_private(struct pthread *) __hidden; 615 void _libpthread_init(struct pthread *) __hidden; 616 struct pthread *_thr_alloc(struct pthread *) __hidden; 617 void _thread_exit(const char *, int, const char *) __hidden __dead2; 618 void _thr_exit_cleanup(void) __hidden; 619 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 620 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 621 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 622 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 623 void _thr_rtld_init(void) __hidden; 624 void _thr_rtld_fini(void) __hidden; 625 int _thr_stack_alloc(struct pthread_attr *) __hidden; 626 void _thr_stack_free(struct pthread_attr *) __hidden; 627 void _thr_free(struct pthread *, struct pthread *) __hidden; 628 void _thr_gc(struct pthread *) __hidden; 629 void _thread_cleanupspecific(void) __hidden; 630 void _thread_dump_info(void) __hidden; 631 void _thread_printf(int, const char *, ...) __hidden; 632 void _thr_spinlock_init(void) __hidden; 633 int _thr_cancel_enter(struct pthread *) __hidden; 634 void _thr_cancel_leave(struct pthread *, int) __hidden; 635 void _thr_signal_block(struct pthread *) __hidden; 636 void _thr_signal_unblock(struct pthread *) __hidden; 637 void _thr_signal_init(void) __hidden; 638 void _thr_signal_deinit(void) __hidden; 639 int _thr_send_sig(struct pthread *, int sig) __hidden; 640 void _thr_list_init(void) __hidden; 641 void _thr_hash_add(struct pthread *) __hidden; 642 void _thr_hash_remove(struct pthread *) __hidden; 643 struct pthread *_thr_hash_find(struct pthread *) __hidden; 644 void _thr_link(struct pthread *, struct pthread *) __hidden; 645 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 646 void _thr_suspend_check(struct pthread *) __hidden; 647 void _thr_assert_lock_level(void) __hidden __dead2; 648 void _thr_ast(struct pthread *) __hidden; 649 void _thr_once_init(void) __hidden; 650 void _thr_report_creation(struct pthread *curthread, 651 struct pthread *newthread) __hidden; 652 void _thr_report_death(struct pthread *curthread) __hidden; 653 void _thread_bp_create(void); 654 void _thread_bp_death(void); 655 656 /* #include <fcntl.h> */ 657 #ifdef _SYS_FCNTL_H_ 658 int __sys_fcntl(int, int, ...); 659 int __sys_open(const char *, int, ...); 660 #endif 661 662 /* #include <signal.h> */ 663 #ifdef _SIGNAL_H_ 664 int __sys_kill(pid_t, int); 665 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 666 int __sys_sigpending(sigset_t *); 667 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 668 int __sys_sigsuspend(const sigset_t *); 669 int __sys_sigreturn(ucontext_t *); 670 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 671 int __sys_sigwait(const sigset_t *, int *); 672 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 673 const struct timespec *); 674 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 675 #endif 676 677 /* #include <time.h> */ 678 #ifdef _TIME_H_ 679 int __sys_nanosleep(const struct timespec *, struct timespec *); 680 #endif 681 682 /* #include <unistd.h> */ 683 #ifdef _UNISTD_H_ 684 int __sys_close(int); 685 int __sys_fork(void); 686 pid_t __sys_getpid(void); 687 ssize_t __sys_read(int, void *, size_t); 688 ssize_t __sys_write(int, const void *, size_t); 689 void __sys_exit(int); 690 #endif 691 692 static inline int 693 _thr_isthreaded(void) 694 { 695 return (__isthreaded != 0); 696 } 697 698 static inline int 699 _thr_is_inited(void) 700 { 701 return (_thr_initial != NULL); 702 } 703 704 static inline void 705 _thr_check_init(void) 706 { 707 if (_thr_initial == NULL) 708 _libpthread_init(NULL); 709 } 710 711 __END_DECLS 712 713 #endif /* !_THR_PRIVATE_H */ 714