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