thr_private.h revision 161069
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 161069 2006-08-08 05:04:43Z 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; 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 111struct 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 struct pthread *m_owner; 119 int m_flags; 120 int m_count; 121 int m_refcount; 122 123 /* 124 * Used for priority protection, the ceiling priority of 125 * this mutex. 126 */ 127 int m_prio; 128 129 /* 130 * Link for list of all mutexes a thread currently owns. 131 */ 132 TAILQ_ENTRY(pthread_mutex) m_qe; 133}; 134 135/* 136 * Flags for mutexes. 137 */ 138#define MUTEX_FLAGS_PRIVATE 0x01 139#define MUTEX_FLAGS_INITED 0x02 140#define MUTEX_FLAGS_BUSY 0x04 141 142struct pthread_mutex_attr { 143 enum pthread_mutextype m_type; 144 int m_protocol; 145 int m_ceiling; 146 int m_flags; 147}; 148 149#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 150 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 151 152struct pthread_cond { 153 /* 154 * Lock for accesses to this structure. 155 */ 156 volatile umtx_t c_lock; 157 volatile umtx_t c_seqno; 158 volatile int c_waiters; 159 volatile int c_wakeups; 160 int c_pshared; 161 int c_clockid; 162}; 163 164struct pthread_cond_attr { 165 int c_pshared; 166 int c_clockid; 167}; 168 169struct pthread_barrier { 170 volatile umtx_t b_lock; 171 volatile umtx_t b_cycle; 172 volatile int b_count; 173 volatile int b_waiters; 174}; 175 176struct pthread_barrierattr { 177 int pshared; 178}; 179 180struct pthread_spinlock { 181 volatile umtx_t s_lock; 182}; 183 184/* 185 * Flags for condition variables. 186 */ 187#define COND_FLAGS_PRIVATE 0x01 188#define COND_FLAGS_INITED 0x02 189#define COND_FLAGS_BUSY 0x04 190 191/* 192 * Cleanup definitions. 193 */ 194struct pthread_cleanup { 195 struct pthread_cleanup *next; 196 void (*routine)(void *args); 197 void *routine_arg; 198 int onstack; 199}; 200 201#define THR_CLEANUP_PUSH(td, func, arg) { \ 202 struct pthread_cleanup __cup; \ 203 \ 204 __cup.routine = func; \ 205 __cup.routine_arg = arg; \ 206 __cup.onstack = 1; \ 207 __cup.next = (td)->cleanup; \ 208 (td)->cleanup = &__cup; 209 210#define THR_CLEANUP_POP(td, exec) \ 211 (td)->cleanup = __cup.next; \ 212 if ((exec) != 0) \ 213 __cup.routine(__cup.routine_arg); \ 214} 215 216struct pthread_atfork { 217 TAILQ_ENTRY(pthread_atfork) qe; 218 void (*prepare)(void); 219 void (*parent)(void); 220 void (*child)(void); 221}; 222 223struct pthread_attr { 224 int sched_policy; 225 int sched_inherit; 226 int prio; 227 int suspend; 228#define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 229 int flags; 230 void *stackaddr_attr; 231 size_t stacksize_attr; 232 size_t guardsize_attr; 233}; 234 235/* 236 * Thread creation state attributes. 237 */ 238#define THR_CREATE_RUNNING 0 239#define THR_CREATE_SUSPENDED 1 240 241/* 242 * Miscellaneous definitions. 243 */ 244#define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 245 246/* 247 * Maximum size of initial thread's stack. This perhaps deserves to be larger 248 * than the stacks of other threads, since many applications are likely to run 249 * almost entirely on this stack. 250 */ 251#define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 252 253/* 254 * Define priorities returned by kernel. 255 */ 256#define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 257#define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 258#define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 259 260#define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 261#define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 262#define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 263 264/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 265#define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 266#define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 267#define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 268 269struct pthread_prio { 270 int pri_min; 271 int pri_max; 272 int pri_default; 273}; 274 275struct pthread_rwlockattr { 276 int pshared; 277}; 278 279struct pthread_rwlock { 280 pthread_mutex_t lock; /* monitor lock */ 281 pthread_cond_t read_signal; 282 pthread_cond_t write_signal; 283 int state; /* 0 = idle >0 = # of readers -1 = writer */ 284 int blocked_writers; 285}; 286 287/* 288 * Thread states. 289 */ 290enum pthread_state { 291 PS_RUNNING, 292 PS_DEAD 293}; 294 295struct pthread_specific_elem { 296 const void *data; 297 int seqno; 298}; 299 300struct pthread_key { 301 volatile int allocated; 302 int seqno; 303 void (*destructor)(void *); 304}; 305 306/* 307 * Thread structure. 308 */ 309struct pthread { 310 /* Kernel thread id. */ 311 long tid; 312#define TID_TERMINATED 1 313 314 /* 315 * Lock for accesses to this thread structure. 316 */ 317 umtx_t lock; 318 319 /* Internal condition variable cycle number. */ 320 umtx_t cycle; 321 322 /* How many low level locks the thread held. */ 323 int locklevel; 324 325 /* 326 * Set to non-zero when this thread has entered a critical 327 * region. We allow for recursive entries into critical regions. 328 */ 329 int critical_count; 330 331 /* Signal blocked counter. */ 332 int sigblock; 333 334 /* Queue entry for list of all threads. */ 335 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 336 337 /* Queue entry for GC lists. */ 338 TAILQ_ENTRY(pthread) gcle; 339 340 /* Hash queue entry. */ 341 LIST_ENTRY(pthread) hle; 342 343 /* Threads reference count. */ 344 int refcount; 345 346 /* 347 * Thread start routine, argument, stack pointer and thread 348 * attributes. 349 */ 350 void *(*start_routine)(void *); 351 void *arg; 352 struct pthread_attr attr; 353 354 /* 355 * Cancelability flags 356 */ 357#define THR_CANCEL_DISABLE 0x0001 358#define THR_CANCEL_EXITING 0x0002 359#define THR_CANCEL_AT_POINT 0x0004 360#define THR_CANCEL_NEEDED 0x0008 361#define SHOULD_CANCEL(val) \ 362 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 363 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED) 364 365#define SHOULD_ASYNC_CANCEL(val) \ 366 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 367 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \ 368 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) 369 int cancelflags; 370 371 /* Thread temporary signal mask. */ 372 sigset_t sigmask; 373 374 /* Thread state: */ 375 umtx_t state; 376 377 /* 378 * Error variable used instead of errno. The function __error() 379 * returns a pointer to this. 380 */ 381 int error; 382 383 /* 384 * The joiner is the thread that is joining to this thread. The 385 * join status keeps track of a join operation to another thread. 386 */ 387 struct pthread *joiner; 388 389 /* 390 * The current thread can belong to a priority mutex queue. 391 * This is the synchronization queue link. 392 */ 393 TAILQ_ENTRY(pthread) sqe; 394 395 /* Miscellaneous flags; only set with scheduling lock held. */ 396 int flags; 397#define THR_FLAGS_PRIVATE 0x0001 398#define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 399#define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 400 401 /* Thread list flags; only set with thread list lock held. */ 402 int tlflags; 403#define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 404#define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 405#define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 406#define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 407 408 /* Queue of currently owned simple type mutexes. */ 409 TAILQ_HEAD(, pthread_mutex) 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_UMTX_TRYLOCK(thrd, lck) \ 457 _thr_umtx_trylock((lck), (thrd)->tid) 458 459#define THR_UMTX_LOCK(thrd, lck) \ 460 _thr_umtx_lock((lck), (thrd)->tid) 461 462#define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 463 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 464 465#define THR_UMTX_UNLOCK(thrd, lck) \ 466 _thr_umtx_unlock((lck), (thrd)->tid) 467 468#define THR_LOCK_ACQUIRE(thrd, lck) \ 469do { \ 470 (thrd)->locklevel++; \ 471 _thr_umtx_lock(lck, (thrd)->tid); \ 472} while (0) 473 474#ifdef _PTHREADS_INVARIANTS 475#define THR_ASSERT_LOCKLEVEL(thrd) \ 476do { \ 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) \ 485do { \ 486 THR_ASSERT_LOCKLEVEL(thrd); \ 487 _thr_umtx_unlock((lck), (thrd)->tid); \ 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) \ 498do { \ 499 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 500} while (0) 501 502#define THREAD_LIST_UNLOCK(curthrd) \ 503do { \ 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 546extern int __isthreaded; 547 548/* 549 * Global variables for the pthread kernel. 550 */ 551 552extern char *_usrstack __hidden; 553extern struct pthread *_thr_initial __hidden; 554extern int _thr_scope_system __hidden; 555 556/* For debugger */ 557extern int _libthr_debug; 558extern int _thread_event_mask; 559extern struct pthread *_thread_last_event; 560 561/* List of all threads: */ 562extern pthreadlist _thread_list; 563 564/* List of threads needing GC: */ 565extern pthreadlist _thread_gc_list __hidden; 566 567extern int _thread_active_threads; 568extern atfork_head _thr_atfork_list __hidden; 569extern umtx_t _thr_atfork_lock __hidden; 570 571/* Default thread attributes: */ 572extern struct pthread_attr _pthread_attr_default __hidden; 573 574/* Default mutex attributes: */ 575extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 576 577/* Default condition variable attributes: */ 578extern struct pthread_cond_attr _pthread_condattr_default __hidden; 579 580extern struct pthread_prio _thr_priorities[] __hidden; 581 582extern pid_t _thr_pid __hidden; 583extern int _thr_smp_cpus __hidden; 584 585extern size_t _thr_guard_default __hidden; 586extern size_t _thr_stack_default __hidden; 587extern size_t _thr_stack_initial __hidden; 588extern int _thr_page_size __hidden; 589/* Garbage thread count. */ 590extern int _gc_count __hidden; 591 592extern umtx_t _mutex_static_lock __hidden; 593extern umtx_t _cond_static_lock __hidden; 594extern umtx_t _rwlock_static_lock __hidden; 595extern umtx_t _keytable_lock __hidden; 596extern umtx_t _thr_list_lock __hidden; 597extern umtx_t _thr_event_lock __hidden; 598 599/* 600 * Function prototype definitions. 601 */ 602__BEGIN_DECLS 603int _thr_setthreaded(int) __hidden; 604int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden; 605int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden; 606int _mutex_reinit(pthread_mutex_t *) __hidden; 607void _mutex_fork(struct pthread *curthread) __hidden; 608void _mutex_unlock_private(struct pthread *) __hidden; 609void _libpthread_init(struct pthread *) __hidden; 610struct pthread *_thr_alloc(struct pthread *) __hidden; 611void _thread_exit(const char *, int, const char *) __hidden __dead2; 612void _thr_exit_cleanup(void) __hidden; 613int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 614void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 615void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 616int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 617void _thr_rtld_init(void) __hidden; 618void _thr_rtld_fini(void) __hidden; 619int _thr_stack_alloc(struct pthread_attr *) __hidden; 620void _thr_stack_free(struct pthread_attr *) __hidden; 621void _thr_free(struct pthread *, struct pthread *) __hidden; 622void _thr_gc(struct pthread *) __hidden; 623void _thread_cleanupspecific(void) __hidden; 624void _thread_dump_info(void) __hidden; 625void _thread_printf(int, const char *, ...) __hidden; 626void _thr_spinlock_init(void) __hidden; 627int _thr_cancel_enter(struct pthread *) __hidden; 628void _thr_cancel_leave(struct pthread *, int) __hidden; 629void _thr_signal_block(struct pthread *) __hidden; 630void _thr_signal_unblock(struct pthread *) __hidden; 631void _thr_signal_init(void) __hidden; 632void _thr_signal_deinit(void) __hidden; 633int _thr_send_sig(struct pthread *, int sig) __hidden; 634void _thr_list_init(void) __hidden; 635void _thr_hash_add(struct pthread *) __hidden; 636void _thr_hash_remove(struct pthread *) __hidden; 637struct pthread *_thr_hash_find(struct pthread *) __hidden; 638void _thr_link(struct pthread *, struct pthread *) __hidden; 639void _thr_unlink(struct pthread *, struct pthread *) __hidden; 640void _thr_suspend_check(struct pthread *) __hidden; 641void _thr_assert_lock_level(void) __hidden __dead2; 642void _thr_ast(struct pthread *) __hidden; 643void _thr_once_init(void) __hidden; 644void _thr_report_creation(struct pthread *curthread, 645 struct pthread *newthread) __hidden; 646void _thr_report_death(struct pthread *curthread) __hidden; 647void _thread_bp_create(void); 648void _thread_bp_death(void); 649 650/* #include <fcntl.h> */ 651#ifdef _SYS_FCNTL_H_ 652int __sys_fcntl(int, int, ...); 653int __sys_open(const char *, int, ...); 654#endif 655 656/* #include <signal.h> */ 657#ifdef _SIGNAL_H_ 658int __sys_kill(pid_t, int); 659int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 660int __sys_sigpending(sigset_t *); 661int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 662int __sys_sigsuspend(const sigset_t *); 663int __sys_sigreturn(ucontext_t *); 664int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 665int __sys_sigwait(const sigset_t *, int *); 666int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 667 const struct timespec *); 668int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 669#endif 670 671/* #include <time.h> */ 672#ifdef _TIME_H_ 673int __sys_nanosleep(const struct timespec *, struct timespec *); 674#endif 675 676/* #include <unistd.h> */ 677#ifdef _UNISTD_H_ 678int __sys_close(int); 679int __sys_fork(void); 680pid_t __sys_getpid(void); 681ssize_t __sys_read(int, void *, size_t); 682ssize_t __sys_write(int, const void *, size_t); 683void __sys_exit(int); 684#endif 685 686static inline int 687_thr_isthreaded(void) 688{ 689 return (__isthreaded != 0); 690} 691 692static inline int 693_thr_is_inited(void) 694{ 695 return (_thr_initial != NULL); 696} 697 698static inline void 699_thr_check_init(void) 700{ 701 if (_thr_initial == NULL) 702 _libpthread_init(NULL); 703} 704 705__END_DECLS 706 707#endif /* !_THR_PRIVATE_H */ 708