thr_private.h revision 161681
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 161681 2006-08-28 04:52:50Z 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 <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 61typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 62typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 63TAILQ_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 112struct 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 135struct 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 145struct pthread_cond { 146 /* 147 * Lock for accesses to this structure. 148 */ 149 volatile umtx_t 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 157struct pthread_cond_attr { 158 int c_pshared; 159 int c_clockid; 160}; 161 162struct pthread_barrier { 163 volatile umtx_t b_lock; 164 volatile umtx_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 volatile umtx_t 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}; 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 262struct pthread_prio { 263 int pri_min; 264 int pri_max; 265 int pri_default; 266}; 267 268struct pthread_rwlockattr { 269 int pshared; 270}; 271 272struct 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 */ 283enum pthread_state { 284 PS_RUNNING, 285 PS_DEAD 286}; 287 288struct pthread_specific_elem { 289 const void *data; 290 int seqno; 291}; 292 293struct 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 */ 308struct 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 umtx_t 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 umtx_t 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_UMTX_TRYLOCK(thrd, lck) \ 453 _thr_umtx_trylock((lck), (thrd)->tid) 454 455#define THR_UMTX_LOCK(thrd, lck) \ 456 _thr_umtx_lock((lck), (thrd)->tid) 457 458#define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 459 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 460 461#define THR_UMTX_UNLOCK(thrd, lck) \ 462 _thr_umtx_unlock((lck), (thrd)->tid) 463 464#define THR_LOCK_ACQUIRE(thrd, lck) \ 465do { \ 466 (thrd)->locklevel++; \ 467 _thr_umtx_lock(lck, (thrd)->tid); \ 468} while (0) 469 470#ifdef _PTHREADS_INVARIANTS 471#define THR_ASSERT_LOCKLEVEL(thrd) \ 472do { \ 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) \ 481do { \ 482 THR_ASSERT_LOCKLEVEL(thrd); \ 483 _thr_umtx_unlock((lck), (thrd)->tid); \ 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) \ 494do { \ 495 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 496} while (0) 497 498#define THREAD_LIST_UNLOCK(curthrd) \ 499do { \ 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 542extern int __isthreaded; 543 544/* 545 * Global variables for the pthread kernel. 546 */ 547 548extern char *_usrstack __hidden; 549extern struct pthread *_thr_initial __hidden; 550extern int _thr_scope_system __hidden; 551 552/* For debugger */ 553extern int _libthr_debug; 554extern int _thread_event_mask; 555extern struct pthread *_thread_last_event; 556 557/* List of all threads: */ 558extern pthreadlist _thread_list; 559 560/* List of threads needing GC: */ 561extern pthreadlist _thread_gc_list __hidden; 562 563extern int _thread_active_threads; 564extern atfork_head _thr_atfork_list __hidden; 565extern umtx_t _thr_atfork_lock __hidden; 566 567/* Default thread attributes: */ 568extern struct pthread_attr _pthread_attr_default __hidden; 569 570/* Default mutex attributes: */ 571extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 572 573/* Default condition variable attributes: */ 574extern struct pthread_cond_attr _pthread_condattr_default __hidden; 575 576extern struct pthread_prio _thr_priorities[] __hidden; 577 578extern pid_t _thr_pid __hidden; 579extern int _thr_smp_cpus __hidden; 580 581extern size_t _thr_guard_default __hidden; 582extern size_t _thr_stack_default __hidden; 583extern size_t _thr_stack_initial __hidden; 584extern int _thr_page_size __hidden; 585/* Garbage thread count. */ 586extern int _gc_count __hidden; 587 588extern umtx_t _mutex_static_lock __hidden; 589extern umtx_t _cond_static_lock __hidden; 590extern umtx_t _rwlock_static_lock __hidden; 591extern umtx_t _keytable_lock __hidden; 592extern umtx_t _thr_list_lock __hidden; 593extern umtx_t _thr_event_lock __hidden; 594 595/* 596 * Function prototype definitions. 597 */ 598__BEGIN_DECLS 599int _thr_setthreaded(int) __hidden; 600int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 601int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 602int _mutex_reinit(pthread_mutex_t *) __hidden; 603void _mutex_fork(struct pthread *curthread) __hidden; 604void _mutex_unlock_private(struct pthread *) __hidden; 605void _libpthread_init(struct pthread *) __hidden; 606struct pthread *_thr_alloc(struct pthread *) __hidden; 607void _thread_exit(const char *, int, const char *) __hidden __dead2; 608void _thr_exit_cleanup(void) __hidden; 609int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 610void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 611void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 612int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 613void _thr_rtld_init(void) __hidden; 614void _thr_rtld_fini(void) __hidden; 615int _thr_stack_alloc(struct pthread_attr *) __hidden; 616void _thr_stack_free(struct pthread_attr *) __hidden; 617void _thr_free(struct pthread *, struct pthread *) __hidden; 618void _thr_gc(struct pthread *) __hidden; 619void _thread_cleanupspecific(void) __hidden; 620void _thread_dump_info(void) __hidden; 621void _thread_printf(int, const char *, ...) __hidden; 622void _thr_spinlock_init(void) __hidden; 623int _thr_cancel_enter(struct pthread *) __hidden; 624void _thr_cancel_leave(struct pthread *, int) __hidden; 625void _thr_signal_block(struct pthread *) __hidden; 626void _thr_signal_unblock(struct pthread *) __hidden; 627void _thr_signal_init(void) __hidden; 628void _thr_signal_deinit(void) __hidden; 629int _thr_send_sig(struct pthread *, int sig) __hidden; 630void _thr_list_init(void) __hidden; 631void _thr_hash_add(struct pthread *) __hidden; 632void _thr_hash_remove(struct pthread *) __hidden; 633struct pthread *_thr_hash_find(struct pthread *) __hidden; 634void _thr_link(struct pthread *, struct pthread *) __hidden; 635void _thr_unlink(struct pthread *, struct pthread *) __hidden; 636void _thr_suspend_check(struct pthread *) __hidden; 637void _thr_assert_lock_level(void) __hidden __dead2; 638void _thr_ast(struct pthread *) __hidden; 639void _thr_once_init(void) __hidden; 640void _thr_report_creation(struct pthread *curthread, 641 struct pthread *newthread) __hidden; 642void _thr_report_death(struct pthread *curthread) __hidden; 643void _thread_bp_create(void); 644void _thread_bp_death(void); 645 646/* #include <fcntl.h> */ 647#ifdef _SYS_FCNTL_H_ 648int __sys_fcntl(int, int, ...); 649int __sys_open(const char *, int, ...); 650#endif 651 652/* #include <signal.h> */ 653#ifdef _SIGNAL_H_ 654int __sys_kill(pid_t, int); 655int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 656int __sys_sigpending(sigset_t *); 657int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 658int __sys_sigsuspend(const sigset_t *); 659int __sys_sigreturn(ucontext_t *); 660int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 661int __sys_sigwait(const sigset_t *, int *); 662int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 663 const struct timespec *); 664int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 665#endif 666 667/* #include <time.h> */ 668#ifdef _TIME_H_ 669int __sys_nanosleep(const struct timespec *, struct timespec *); 670#endif 671 672/* #include <unistd.h> */ 673#ifdef _UNISTD_H_ 674int __sys_close(int); 675int __sys_fork(void); 676pid_t __sys_getpid(void); 677ssize_t __sys_read(int, void *, size_t); 678ssize_t __sys_write(int, const void *, size_t); 679void __sys_exit(int); 680#endif 681 682static inline int 683_thr_isthreaded(void) 684{ 685 return (__isthreaded != 0); 686} 687 688static inline int 689_thr_is_inited(void) 690{ 691 return (_thr_initial != NULL); 692} 693 694static inline void 695_thr_check_init(void) 696{ 697 if (_thr_initial == NULL) 698 _libpthread_init(NULL); 699} 700 701__END_DECLS 702 703#endif /* !_THR_PRIVATE_H */ 704