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 TAILQ_HEAD(mutex_head, pthread) m_queue; 119 struct pthread *m_owner; 120 long m_flags; 121 int m_count; 122 int m_refcount; 123 124 /* 125 * Used for priority inheritence and protection. 126 * 127 * m_prio - For priority inheritence, the highest active 128 * priority (threads locking the mutex inherit 129 * this priority). For priority protection, the 130 * ceiling priority of this mutex. 131 * m_saved_prio - mutex owners inherited priority before 132 * taking the mutex, restored when the owner 133 * unlocks the mutex. 134 */ 135 int m_prio; 136 int m_saved_prio; 137 138 /* 139 * Link for list of all mutexes a thread currently owns. 140 */ 141 TAILQ_ENTRY(pthread_mutex) m_qe; 142 }; 143 144 /* 145 * Flags for mutexes. 146 */ 147 #define MUTEX_FLAGS_PRIVATE 0x01 148 #define MUTEX_FLAGS_INITED 0x02 149 #define MUTEX_FLAGS_BUSY 0x04 150 151 struct pthread_mutex_attr { 152 enum pthread_mutextype m_type; 153 int m_protocol; 154 int m_ceiling; 155 long m_flags; 156 }; 157 158 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 159 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 160 161 struct pthread_cond { 162 /* 163 * Lock for accesses to this structure. 164 */ 165 volatile umtx_t c_lock; 166 volatile umtx_t c_seqno; 167 volatile int c_waiters; 168 volatile int c_wakeups; 169 int c_pshared; 170 int c_clockid; 171 }; 172 173 struct pthread_cond_attr { 174 int c_pshared; 175 int c_clockid; 176 }; 177 178 struct pthread_barrier { 179 volatile umtx_t b_lock; 180 volatile umtx_t b_cycle; 181 volatile int b_count; 182 volatile int b_waiters; 183 }; 184 185 struct pthread_barrierattr { 186 int pshared; 187 }; 188 189 struct pthread_spinlock { 190 volatile umtx_t s_lock; 191 }; 192 193 /* 194 * Flags for condition variables. 195 */ 196 #define COND_FLAGS_PRIVATE 0x01 197 #define COND_FLAGS_INITED 0x02 198 #define COND_FLAGS_BUSY 0x04 199 200 /* 201 * Cleanup definitions. 202 */ 203 struct pthread_cleanup { 204 struct pthread_cleanup *next; 205 void (*routine)(void *args); 206 void *routine_arg; 207 int onstack; 208 }; 209 210 #define THR_CLEANUP_PUSH(td, func, arg) { \ 211 struct pthread_cleanup __cup; \ 212 \ 213 __cup.routine = func; \ 214 __cup.routine_arg = arg; \ 215 __cup.onstack = 1; \ 216 __cup.next = (td)->cleanup; \ 217 (td)->cleanup = &__cup; 218 219 #define THR_CLEANUP_POP(td, exec) \ 220 (td)->cleanup = __cup.next; \ 221 if ((exec) != 0) \ 222 __cup.routine(__cup.routine_arg); \ 223 } 224 225 struct pthread_atfork { 226 TAILQ_ENTRY(pthread_atfork) qe; 227 void (*prepare)(void); 228 void (*parent)(void); 229 void (*child)(void); 230 }; 231 232 struct pthread_attr { 233 int sched_policy; 234 int sched_inherit; 235 int sched_interval; 236 int prio; 237 int suspend; 238 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 239 int flags; 240 void *arg_attr; 241 void *stackaddr_attr; 242 size_t stacksize_attr; 243 size_t guardsize_attr; 244 }; 245 246 /* 247 * Thread creation state attributes. 248 */ 249 #define THR_CREATE_RUNNING 0 250 #define THR_CREATE_SUSPENDED 1 251 252 /* 253 * Miscellaneous definitions. 254 */ 255 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 256 257 /* 258 * Maximum size of initial thread's stack. This perhaps deserves to be larger 259 * than the stacks of other threads, since many applications are likely to run 260 * almost entirely on this stack. 261 */ 262 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 263 264 /* 265 * Define the different priority ranges. All applications have thread 266 * priorities constrained within 0-31. The threads library raises the 267 * priority when delivering signals in order to ensure that signal 268 * delivery happens (from the POSIX spec) "as soon as possible". 269 * In the future, the threads library will also be able to map specific 270 * threads into real-time (cooperating) processes or kernel threads. 271 * The RT and SIGNAL priorities will be used internally and added to 272 * thread base priorities so that the scheduling queue can handle both 273 * normal and RT priority threads with and without signal handling. 274 * 275 * The approach taken is that, within each class, signal delivery 276 * always has priority over thread execution. 277 */ 278 #define THR_DEFAULT_PRIORITY 15 279 #define THR_MIN_PRIORITY 0 280 #define THR_MAX_PRIORITY 31 /* 0x1F */ 281 #define THR_SIGNAL_PRIORITY 32 /* 0x20 */ 282 #define THR_RT_PRIORITY 64 /* 0x40 */ 283 #define THR_FIRST_PRIORITY THR_MIN_PRIORITY 284 #define THR_LAST_PRIORITY \ 285 (THR_MAX_PRIORITY + THR_SIGNAL_PRIORITY + THR_RT_PRIORITY) 286 #define THR_BASE_PRIORITY(prio) ((prio) & THR_MAX_PRIORITY) 287 288 /* 289 * Time slice period in microseconds. 290 */ 291 #define TIMESLICE_USEC 20000 292 293 struct pthread_rwlockattr { 294 int pshared; 295 }; 296 297 struct pthread_rwlock { 298 pthread_mutex_t lock; /* monitor lock */ 299 pthread_cond_t read_signal; 300 pthread_cond_t write_signal; 301 int state; /* 0 = idle >0 = # of readers -1 = writer */ 302 int blocked_writers; 303 }; 304 305 /* 306 * Thread states. 307 */ 308 enum pthread_state { 309 PS_RUNNING, 310 PS_DEAD 311 }; 312 313 struct pthread_specific_elem { 314 const void *data; 315 int seqno; 316 }; 317 318 struct pthread_key { 319 volatile int allocated; 320 volatile int count; 321 int seqno; 322 void (*destructor)(void *); 323 }; 324 325 /* 326 * Thread structure. 327 */ 328 struct pthread { 329 /* Kernel thread id. */ 330 long tid; 331 #define TID_TERMINATED 1 332 333 /* 334 * Lock for accesses to this thread structure. 335 */ 336 umtx_t lock; 337 338 /* Internal condition variable cycle number. */ 339 umtx_t cycle; 340 341 /* How many low level locks the thread held. */ 342 int locklevel; 343 344 /* 345 * Set to non-zero when this thread has entered a critical 346 * region. We allow for recursive entries into critical regions. 347 */ 348 int critical_count; 349 350 /* Signal blocked counter. */ 351 int sigblock; 352 353 /* Queue entry for list of all threads. */ 354 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 355 356 /* Queue entry for GC lists. */ 357 TAILQ_ENTRY(pthread) gcle; 358 359 /* Hash queue entry. */ 360 LIST_ENTRY(pthread) hle; 361 362 /* Threads reference count. */ 363 int refcount; 364 365 /* 366 * Thread start routine, argument, stack pointer and thread 367 * attributes. 368 */ 369 void *(*start_routine)(void *); 370 void *arg; 371 struct pthread_attr attr; 372 373 /* 374 * Cancelability flags 375 */ 376 #define THR_CANCEL_DISABLE 0x0001 377 #define THR_CANCEL_EXITING 0x0002 378 #define THR_CANCEL_AT_POINT 0x0004 379 #define THR_CANCEL_NEEDED 0x0008 380 #define SHOULD_CANCEL(val) \ 381 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 382 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED) 383 384 #define SHOULD_ASYNC_CANCEL(val) \ 385 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 386 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \ 387 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) 388 int cancelflags; 389 390 /* Thread temporary signal mask. */ 391 sigset_t sigmask; 392 393 /* Thread state: */ 394 umtx_t state; 395 396 /* 397 * Error variable used instead of errno. The function __error() 398 * returns a pointer to this. 399 */ 400 int error; 401 402 /* 403 * The joiner is the thread that is joining to this thread. The 404 * join status keeps track of a join operation to another thread. 405 */ 406 struct pthread *joiner; 407 408 /* 409 * The current thread can belong to a priority mutex queue. 410 * This is the synchronization queue link. 411 */ 412 TAILQ_ENTRY(pthread) sqe; 413 414 /* Miscellaneous flags; only set with scheduling lock held. */ 415 int flags; 416 #define THR_FLAGS_PRIVATE 0x0001 417 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 418 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 419 420 /* Thread list flags; only set with thread list lock held. */ 421 int tlflags; 422 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 423 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 424 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 425 #define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 426 427 /* 428 * Base priority is the user setable and retrievable priority 429 * of the thread. It is only affected by explicit calls to 430 * set thread priority and upon thread creation via a thread 431 * attribute or default priority. 432 */ 433 char base_priority; 434 435 /* 436 * Inherited priority is the priority a thread inherits by 437 * taking a priority inheritence or protection mutex. It 438 * is not affected by base priority changes. Inherited 439 * priority defaults to and remains 0 until a mutex is taken 440 * that is being waited on by any other thread whose priority 441 * is non-zero. 442 */ 443 char inherited_priority; 444 445 /* 446 * Active priority is always the maximum of the threads base 447 * priority and inherited priority. When there is a change 448 * in either the base or inherited priority, the active 449 * priority must be recalculated. 450 */ 451 char active_priority; 452 453 /* Queue of currently owned simple type mutexes. */ 454 TAILQ_HEAD(, pthread_mutex) mutexq; 455 456 void *ret; 457 struct pthread_specific_elem *specific; 458 int specific_data_count; 459 460 /* Number rwlocks rdlocks held. */ 461 int rdlock_count; 462 463 /* 464 * Current locks bitmap for rtld. */ 465 int rtld_bits; 466 467 /* Thread control block */ 468 struct tcb *tcb; 469 470 /* Cleanup handlers Link List */ 471 struct pthread_cleanup *cleanup; 472 473 /* 474 * Magic value to help recognize a valid thread structure 475 * from an invalid one: 476 */ 477 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 478 u_int32_t magic; 479 480 /* Enable event reporting */ 481 int report_events; 482 483 /* Event mask */ 484 int event_mask; 485 486 /* Event */ 487 td_event_msg_t event_buf; 488 }; 489 490 #define THR_IN_CRITICAL(thrd) \ 491 (((thrd)->locklevel > 0) || \ 492 ((thrd)->critical_count > 0)) 493 494 #define THR_CRITICAL_ENTER(thrd) \ 495 (thrd)->critical_count++ 496 497 #define THR_CRITICAL_LEAVE(thrd) \ 498 (thrd)->critical_count--; \ 499 _thr_ast(thrd); 500 501 #define THR_UMTX_TRYLOCK(thrd, lck) \ 502 _thr_umtx_trylock((lck), (thrd)->tid) 503 504 #define THR_UMTX_LOCK(thrd, lck) \ 505 _thr_umtx_lock((lck), (thrd)->tid) 506 507 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 508 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 509 510 #define THR_UMTX_UNLOCK(thrd, lck) \ 511 _thr_umtx_unlock((lck), (thrd)->tid) 512 513 #define THR_LOCK_ACQUIRE(thrd, lck) \ 514 do { \ 515 (thrd)->locklevel++; \ 516 _thr_umtx_lock(lck, (thrd)->tid); \ 517 } while (0) 518 519 #ifdef _PTHREADS_INVARIANTS 520 #define THR_ASSERT_LOCKLEVEL(thrd) \ 521 do { \ 522 if (__predict_false((thrd)->locklevel <= 0)) \ 523 _thr_assert_lock_level(); \ 524 } while (0) 525 #else 526 #define THR_ASSERT_LOCKLEVEL(thrd) 527 #endif 528 529 #define THR_LOCK_RELEASE(thrd, lck) \ 530 do { \ 531 THR_ASSERT_LOCKLEVEL(thrd); \ 532 _thr_umtx_unlock((lck), (thrd)->tid); \ 533 (thrd)->locklevel--; \ 534 _thr_ast(thrd); \ 535 } while (0) 536 537 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 538 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 539 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 540 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 541 542 #define THREAD_LIST_LOCK(curthrd) \ 543 do { \ 544 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 545 } while (0) 546 547 #define THREAD_LIST_UNLOCK(curthrd) \ 548 do { \ 549 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 550 } while (0) 551 552 /* 553 * Macros to insert/remove threads to the all thread list and 554 * the gc list. 555 */ 556 #define THR_LIST_ADD(thrd) do { \ 557 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 558 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 559 _thr_hash_add(thrd); \ 560 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 561 } \ 562 } while (0) 563 #define THR_LIST_REMOVE(thrd) do { \ 564 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 565 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 566 _thr_hash_remove(thrd); \ 567 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 568 } \ 569 } while (0) 570 #define THR_GCLIST_ADD(thrd) do { \ 571 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 572 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 573 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 574 _gc_count++; \ 575 } \ 576 } while (0) 577 #define THR_GCLIST_REMOVE(thrd) do { \ 578 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 579 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 580 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 581 _gc_count--; \ 582 } \ 583 } while (0) 584 585 #define GC_NEEDED() (_gc_count >= 5) 586 587 #define SHOULD_REPORT_EVENT(curthr, e) \ 588 (curthr->report_events && \ 589 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 590 591 extern int __isthreaded; 592 593 /* 594 * Global variables for the pthread kernel. 595 */ 596 597 extern char *_usrstack __hidden; 598 extern struct pthread *_thr_initial __hidden; 599 extern int _thr_scope_system __hidden; 600 601 /* For debugger */ 602 extern int _libthr_debug; 603 extern int _thread_event_mask; 604 extern struct pthread *_thread_last_event; 605 606 /* List of all threads: */ 607 extern pthreadlist _thread_list; 608 609 /* List of threads needing GC: */ 610 extern pthreadlist _thread_gc_list __hidden; 611 612 extern int _thread_active_threads; 613 extern atfork_head _thr_atfork_list __hidden; 614 extern umtx_t _thr_atfork_lock __hidden; 615 616 /* Default thread attributes: */ 617 extern struct pthread_attr _pthread_attr_default __hidden; 618 619 /* Default mutex attributes: */ 620 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 621 622 /* Default condition variable attributes: */ 623 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 624 625 extern pid_t _thr_pid __hidden; 626 extern size_t _thr_guard_default __hidden; 627 extern size_t _thr_stack_default __hidden; 628 extern size_t _thr_stack_initial __hidden; 629 extern int _thr_page_size __hidden; 630 /* Garbage thread count. */ 631 extern int _gc_count __hidden; 632 633 extern umtx_t _mutex_static_lock __hidden; 634 extern umtx_t _cond_static_lock __hidden; 635 extern umtx_t _rwlock_static_lock __hidden; 636 extern umtx_t _keytable_lock __hidden; 637 extern umtx_t _thr_list_lock __hidden; 638 extern umtx_t _thr_event_lock __hidden; 639 640 /* 641 * Function prototype definitions. 642 */ 643 __BEGIN_DECLS 644 int _thr_setthreaded(int) __hidden; 645 int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 646 int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 647 int _mutex_reinit(pthread_mutex_t *) __hidden; 648 void _mutex_fork(struct pthread *curthread) __hidden; 649 void _mutex_unlock_private(struct pthread *) __hidden; 650 void _libpthread_init(struct pthread *) __hidden; 651 struct pthread *_thr_alloc(struct pthread *) __hidden; 652 void _thread_exit(const char *, int, const char *) __hidden __dead2; 653 void _thr_exit_cleanup(void) __hidden; 654 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 655 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 656 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 657 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 658 void _thr_rtld_init(void) __hidden; 659 void _thr_rtld_fini(void) __hidden; 660 int _thr_stack_alloc(struct pthread_attr *) __hidden; 661 void _thr_stack_free(struct pthread_attr *) __hidden; 662 void _thr_free(struct pthread *, struct pthread *) __hidden; 663 void _thr_gc(struct pthread *) __hidden; 664 void _thread_cleanupspecific(void) __hidden; 665 void _thread_dump_info(void) __hidden; 666 void _thread_printf(int, const char *, ...) __hidden; 667 void _thr_spinlock_init(void) __hidden; 668 int _thr_cancel_enter(struct pthread *) __hidden; 669 void _thr_cancel_leave(struct pthread *, int) __hidden; 670 void _thr_signal_block(struct pthread *) __hidden; 671 void _thr_signal_unblock(struct pthread *) __hidden; 672 void _thr_signal_init(void) __hidden; 673 void _thr_signal_deinit(void) __hidden; 674 int _thr_send_sig(struct pthread *, int sig) __hidden; 675 void _thr_list_init(void) __hidden; 676 void _thr_hash_add(struct pthread *) __hidden; 677 void _thr_hash_remove(struct pthread *) __hidden; 678 struct pthread *_thr_hash_find(struct pthread *) __hidden; 679 void _thr_link(struct pthread *, struct pthread *) __hidden; 680 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 681 void _thr_suspend_check(struct pthread *) __hidden; 682 void _thr_assert_lock_level(void) __hidden __dead2; 683 void _thr_ast(struct pthread *) __hidden; 684 void _thr_once_init(void) __hidden; 685 void _thr_report_creation(struct pthread *curthread, 686 struct pthread *newthread) __hidden; 687 void _thr_report_death(struct pthread *curthread) __hidden; 688 void _thread_bp_create(void); 689 void _thread_bp_death(void); 690 691 /* #include <fcntl.h> */ 692 #ifdef _SYS_FCNTL_H_ 693 int __sys_fcntl(int, int, ...); 694 int __sys_open(const char *, int, ...); 695 #endif 696 697 /* #include <signal.h> */ 698 #ifdef _SIGNAL_H_ 699 int __sys_kill(pid_t, int); 700 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 701 int __sys_sigpending(sigset_t *); 702 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 703 int __sys_sigsuspend(const sigset_t *); 704 int __sys_sigreturn(ucontext_t *); 705 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 706 int __sys_sigwait(const sigset_t *, int *); 707 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 708 const struct timespec *); 709 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 710 #endif 711 712 /* #include <time.h> */ 713 #ifdef _TIME_H_ 714 int __sys_nanosleep(const struct timespec *, struct timespec *); 715 #endif 716 717 /* #include <unistd.h> */ 718 #ifdef _UNISTD_H_ 719 int __sys_close(int); 720 int __sys_fork(void); 721 pid_t __sys_getpid(void); 722 ssize_t __sys_read(int, void *, size_t); 723 ssize_t __sys_write(int, const void *, size_t); 724 void __sys_exit(int); 725 #endif 726 727 static inline int 728 _thr_isthreaded(void) 729 { 730 return (__isthreaded != 0); 731 } 732 733 static inline int 734 _thr_is_inited(void) 735 { 736 return (_thr_initial != NULL); 737 } 738 739 static inline void 740 _thr_check_init(void) 741 { 742 if (_thr_initial == NULL) 743 _libpthread_init(NULL); 744 } 745 746 __END_DECLS 747 748 #endif /* !_THR_PRIVATE_H */ 749