thr_private.h revision 176784
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: head/lib/libthr/thread/thr_private.h 176784 2008-03-04 04:28:59Z davidxu $ 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 63typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 64typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 65TAILQ_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 114struct 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 139struct 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 149struct pthread_cond { 150 struct umutex c_lock; 151 struct ucond c_kerncv; 152 int c_pshared; 153 int c_clockid; 154}; 155 156struct pthread_cond_attr { 157 int c_pshared; 158 int c_clockid; 159}; 160 161struct 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 169struct pthread_barrierattr { 170 int pshared; 171}; 172 173struct 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 */ 187struct 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 209struct pthread_atfork { 210 TAILQ_ENTRY(pthread_atfork) qe; 211 void (*prepare)(void); 212 void (*parent)(void); 213 void (*child)(void); 214}; 215 216struct 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 264struct pthread_prio { 265 int pri_min; 266 int pri_max; 267 int pri_default; 268}; 269 270struct pthread_rwlockattr { 271 int pshared; 272}; 273 274struct pthread_rwlock { 275 pthread_mutex_t lock; /* monitor lock */ 276 pthread_cond_t read_signal; 277 pthread_cond_t write_signal; 278 int state; /* 0 = idle >0 = # of readers -1 = writer */ 279 int blocked_writers; 280}; 281 282/* 283 * Thread states. 284 */ 285enum pthread_state { 286 PS_RUNNING, 287 PS_DEAD 288}; 289 290struct pthread_specific_elem { 291 const void *data; 292 int seqno; 293}; 294 295struct pthread_key { 296 volatile int allocated; 297 int seqno; 298 void (*destructor)(void *); 299}; 300 301/* 302 * lwpid_t is 32bit but kernel thr API exports tid as long type 303 * in very earily date. 304 */ 305#define TID(thread) ((uint32_t) ((thread)->tid)) 306 307/* 308 * Thread structure. 309 */ 310struct pthread { 311 /* Kernel thread id. */ 312 long tid; 313#define TID_TERMINATED 1 314 315 /* 316 * Lock for accesses to this thread structure. 317 */ 318 struct umutex lock; 319 320 /* Internal condition variable cycle number. */ 321 long cycle; 322 323 /* How many low level locks the thread held. */ 324 int locklevel; 325 326 /* 327 * Set to non-zero when this thread has entered a critical 328 * region. We allow for recursive entries into critical regions. 329 */ 330 int critical_count; 331 332 /* Signal blocked counter. */ 333 int sigblock; 334 335 /* Queue entry for list of all threads. */ 336 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 337 338 /* Queue entry for GC lists. */ 339 TAILQ_ENTRY(pthread) gcle; 340 341 /* Hash queue entry. */ 342 LIST_ENTRY(pthread) hle; 343 344 /* Threads reference count. */ 345 int refcount; 346 347 /* 348 * Thread start routine, argument, stack pointer and thread 349 * attributes. 350 */ 351 void *(*start_routine)(void *); 352 void *arg; 353 struct pthread_attr attr; 354 355#define SHOULD_CANCEL(thr) \ 356 ((thr)->cancel_pending && \ 357 ((thr)->cancel_point || (thr)->cancel_async) && \ 358 (thr)->cancel_enable && (thr)->cancelling == 0) 359 360 /* Cancellation is enabled */ 361 int cancel_enable; 362 363 /* Cancellation request is pending */ 364 int cancel_pending; 365 366 /* Thread is at cancellation point */ 367 int cancel_point; 368 369 /* Cancellation should be synchoronized */ 370 int cancel_defer; 371 372 /* Asynchronouse cancellation is enabled */ 373 int cancel_async; 374 375 /* Cancellation is in progress */ 376 int cancelling; 377 378 /* Thread temporary signal mask. */ 379 sigset_t sigmask; 380 381 /* Thread is in SIGCANCEL handler. */ 382 int in_sigcancel_handler; 383 384 /* New thread should unblock SIGCANCEL. */ 385 int unblock_sigcancel; 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 (thrd)->critical_count--; \ 464 _thr_ast(thrd); 465 466#define THR_UMUTEX_TRYLOCK(thrd, lck) \ 467 _thr_umutex_trylock((lck), TID(thrd)) 468 469#define THR_UMUTEX_LOCK(thrd, lck) \ 470 _thr_umutex_lock((lck), TID(thrd)) 471 472#define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 473 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 474 475#define THR_UMUTEX_UNLOCK(thrd, lck) \ 476 _thr_umutex_unlock((lck), TID(thrd)) 477 478#define THR_LOCK_ACQUIRE(thrd, lck) \ 479do { \ 480 (thrd)->locklevel++; \ 481 _thr_umutex_lock(lck, TID(thrd)); \ 482} while (0) 483 484#ifdef _PTHREADS_INVARIANTS 485#define THR_ASSERT_LOCKLEVEL(thrd) \ 486do { \ 487 if (__predict_false((thrd)->locklevel <= 0)) \ 488 _thr_assert_lock_level(); \ 489} while (0) 490#else 491#define THR_ASSERT_LOCKLEVEL(thrd) 492#endif 493 494#define THR_LOCK_RELEASE(thrd, lck) \ 495do { \ 496 THR_ASSERT_LOCKLEVEL(thrd); \ 497 _thr_umutex_unlock((lck), TID(thrd)); \ 498 (thrd)->locklevel--; \ 499 _thr_ast(thrd); \ 500} while (0) 501 502#define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 503#define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 504#define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 505#define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 506 507#define THREAD_LIST_LOCK(curthrd) \ 508do { \ 509 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 510} while (0) 511 512#define THREAD_LIST_UNLOCK(curthrd) \ 513do { \ 514 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 515} while (0) 516 517/* 518 * Macros to insert/remove threads to the all thread list and 519 * the gc list. 520 */ 521#define THR_LIST_ADD(thrd) do { \ 522 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 523 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 524 _thr_hash_add(thrd); \ 525 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 526 } \ 527} while (0) 528#define THR_LIST_REMOVE(thrd) do { \ 529 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 530 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 531 _thr_hash_remove(thrd); \ 532 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 533 } \ 534} while (0) 535#define THR_GCLIST_ADD(thrd) do { \ 536 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 537 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 538 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 539 _gc_count++; \ 540 } \ 541} while (0) 542#define THR_GCLIST_REMOVE(thrd) do { \ 543 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 544 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 545 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 546 _gc_count--; \ 547 } \ 548} while (0) 549 550#define GC_NEEDED() (_gc_count >= 5) 551 552#define SHOULD_REPORT_EVENT(curthr, e) \ 553 (curthr->report_events && \ 554 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 555 556extern int __isthreaded; 557 558/* 559 * Global variables for the pthread kernel. 560 */ 561 562extern char *_usrstack __hidden; 563extern struct pthread *_thr_initial __hidden; 564 565/* For debugger */ 566extern int _libthr_debug; 567extern int _thread_event_mask; 568extern struct pthread *_thread_last_event; 569 570/* List of all threads: */ 571extern pthreadlist _thread_list; 572 573/* List of threads needing GC: */ 574extern pthreadlist _thread_gc_list __hidden; 575 576extern int _thread_active_threads; 577extern atfork_head _thr_atfork_list __hidden; 578extern struct umutex _thr_atfork_lock __hidden; 579 580/* Default thread attributes: */ 581extern struct pthread_attr _pthread_attr_default __hidden; 582 583/* Default mutex attributes: */ 584extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 585 586/* Default condition variable attributes: */ 587extern struct pthread_cond_attr _pthread_condattr_default __hidden; 588 589extern struct pthread_prio _thr_priorities[] __hidden; 590 591extern pid_t _thr_pid __hidden; 592extern int _thr_is_smp __hidden; 593 594extern size_t _thr_guard_default __hidden; 595extern size_t _thr_stack_default __hidden; 596extern size_t _thr_stack_initial __hidden; 597extern int _thr_page_size __hidden; 598extern int _thr_spinloops __hidden; 599extern int _thr_yieldloops __hidden; 600 601/* Garbage thread count. */ 602extern int _gc_count __hidden; 603 604extern struct umutex _mutex_static_lock __hidden; 605extern struct umutex _cond_static_lock __hidden; 606extern struct umutex _rwlock_static_lock __hidden; 607extern struct umutex _keytable_lock __hidden; 608extern struct umutex _thr_list_lock __hidden; 609extern struct umutex _thr_event_lock __hidden; 610 611/* 612 * Function prototype definitions. 613 */ 614__BEGIN_DECLS 615int _thr_setthreaded(int) __hidden; 616int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 617int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 618int _mutex_reinit(pthread_mutex_t *) __hidden; 619void _mutex_fork(struct pthread *curthread) __hidden; 620void _mutex_unlock_private(struct pthread *) __hidden; 621void _libpthread_init(struct pthread *) __hidden; 622struct pthread *_thr_alloc(struct pthread *) __hidden; 623void _thread_exit(const char *, int, const char *) __hidden __dead2; 624void _thr_exit_cleanup(void) __hidden; 625int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 626void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 627void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 628int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 629void _thr_rtld_init(void) __hidden; 630void _thr_rtld_fini(void) __hidden; 631int _thr_stack_alloc(struct pthread_attr *) __hidden; 632void _thr_stack_free(struct pthread_attr *) __hidden; 633void _thr_free(struct pthread *, struct pthread *) __hidden; 634void _thr_gc(struct pthread *) __hidden; 635void _thread_cleanupspecific(void) __hidden; 636void _thread_dump_info(void) __hidden; 637void _thread_printf(int, const char *, ...) __hidden; 638void _thr_spinlock_init(void) __hidden; 639void _thr_cancel_enter(struct pthread *) __hidden; 640void _thr_cancel_leave(struct pthread *) __hidden; 641void _thr_cancel_enter_defer(struct pthread *) __hidden; 642void _thr_cancel_leave_defer(struct pthread *, int) __hidden; 643void _thr_testcancel(struct pthread *) __hidden; 644void _thr_signal_block(struct pthread *) __hidden; 645void _thr_signal_unblock(struct pthread *) __hidden; 646void _thr_signal_init(void) __hidden; 647void _thr_signal_deinit(void) __hidden; 648int _thr_send_sig(struct pthread *, int sig) __hidden; 649void _thr_list_init(void) __hidden; 650void _thr_hash_add(struct pthread *) __hidden; 651void _thr_hash_remove(struct pthread *) __hidden; 652struct pthread *_thr_hash_find(struct pthread *) __hidden; 653void _thr_link(struct pthread *, struct pthread *) __hidden; 654void _thr_unlink(struct pthread *, struct pthread *) __hidden; 655void _thr_suspend_check(struct pthread *) __hidden; 656void _thr_assert_lock_level(void) __hidden __dead2; 657void _thr_ast(struct pthread *) __hidden; 658void _thr_once_init(void) __hidden; 659void _thr_report_creation(struct pthread *curthread, 660 struct pthread *newthread) __hidden; 661void _thr_report_death(struct pthread *curthread) __hidden; 662int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 663int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 664int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 665 struct sched_param *param) __hidden; 666int _schedparam_to_rtp(int policy, const struct sched_param *param, 667 struct rtprio *rtp) __hidden; 668void _thread_bp_create(void); 669void _thread_bp_death(void); 670int _sched_yield(void); 671 672/* #include <fcntl.h> */ 673#ifdef _SYS_FCNTL_H_ 674int __sys_fcntl(int, int, ...); 675int __sys_open(const char *, int, ...); 676#endif 677 678/* #include <signal.h> */ 679#ifdef _SIGNAL_H_ 680int __sys_kill(pid_t, int); 681int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 682int __sys_sigpending(sigset_t *); 683int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 684int __sys_sigsuspend(const sigset_t *); 685int __sys_sigreturn(ucontext_t *); 686int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 687int __sys_sigwait(const sigset_t *, int *); 688int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 689 const struct timespec *); 690int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 691#endif 692 693/* #include <time.h> */ 694#ifdef _TIME_H_ 695int __sys_nanosleep(const struct timespec *, struct timespec *); 696#endif 697 698/* #include <unistd.h> */ 699#ifdef _UNISTD_H_ 700int __sys_close(int); 701int __sys_fork(void); 702pid_t __sys_getpid(void); 703ssize_t __sys_read(int, void *, size_t); 704ssize_t __sys_write(int, const void *, size_t); 705void __sys_exit(int); 706#endif 707 708static inline int 709_thr_isthreaded(void) 710{ 711 return (__isthreaded != 0); 712} 713 714static inline int 715_thr_is_inited(void) 716{ 717 return (_thr_initial != NULL); 718} 719 720static inline void 721_thr_check_init(void) 722{ 723 if (_thr_initial == NULL) 724 _libpthread_init(NULL); 725} 726 727__END_DECLS 728 729#endif /* !_THR_PRIVATE_H */ 730