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