1 /* 2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by John Birrell. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * Private thread definitions for the uthread kernel. 33 * 34 * $FreeBSD: src/lib/libpthread/thread/thr_private.h,v 1.120 2004/11/01 10:49:34 davidxu Exp $ 35 * $DragonFly: src/lib/libthread_xu/thread/thr_private.h,v 1.15 2006/04/13 11:48:01 davidxu Exp $ 36 */ 37 38 #ifndef _THR_PRIVATE_H 39 #define _THR_PRIVATE_H 40 41 /* 42 * Include files. 43 */ 44 #include <sys/types.h> 45 #include <sys/time.h> 46 #include <sys/cdefs.h> 47 #include <sys/queue.h> 48 #include <machine/atomic.h> 49 #include <errno.h> 50 #include <limits.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <sched.h> 54 #include <unistd.h> 55 #include <pthread.h> 56 #include <pthread_np.h> 57 58 #include "pthread_md.h" 59 #include "thr_umtx.h" 60 #include "thread_db.h" 61 62 /* Signal to do cancellation */ 63 #define SIGCANCEL 32 64 65 /* 66 * Kernel fatal error handler macro. 67 */ 68 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 69 70 /* Output debug messages like this: */ 71 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 72 #define stderr_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 73 74 #ifdef _PTHREADS_INVARIANTS 75 #define THR_ASSERT(cond, msg) do { \ 76 if (__predict_false(!(cond))) \ 77 PANIC(msg); \ 78 } while (0) 79 #else 80 #define THR_ASSERT(cond, msg) 81 #endif 82 83 #ifdef PIC 84 #define STATIC_LIB_REQUIRE(name) 85 #else 86 #define STATIC_LIB_REQUIRE(name) __asm(".globl " #name) 87 #endif 88 89 TAILQ_HEAD(thread_head, pthread) thread_head; 90 TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 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 volatile umtx_t m_lock; 117 enum pthread_mutextype m_type; 118 int m_protocol; 119 TAILQ_HEAD(mutex_head, pthread) m_queue; 120 struct pthread *m_owner; 121 long m_flags; 122 int m_count; 123 int m_refcount; 124 125 /* 126 * Used for priority inheritence and protection. 127 * 128 * m_prio - For priority inheritence, the highest active 129 * priority (threads locking the mutex inherit 130 * this priority). For priority protection, the 131 * ceiling priority of this mutex. 132 * m_saved_prio - mutex owners inherited priority before 133 * taking the mutex, restored when the owner 134 * unlocks the mutex. 135 */ 136 int m_prio; 137 int m_saved_prio; 138 139 /* 140 * Link for list of all mutexes a thread currently owns. 141 */ 142 TAILQ_ENTRY(pthread_mutex) m_qe; 143 }; 144 145 #define TAILQ_INITIALIZER { NULL, NULL } 146 147 #define PTHREAD_MUTEX_STATIC_INITIALIZER \ 148 {0, PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, TAILQ_INITIALIZER, \ 149 NULL, { NULL }, MUTEX_FLAGS_PRIVATE, 0, 0, 0, TAILQ_INITIALIZER } 150 /* 151 * Flags for mutexes. 152 */ 153 #define MUTEX_FLAGS_PRIVATE 0x01 154 #define MUTEX_FLAGS_INITED 0x02 155 156 struct pthread_mutex_attr { 157 enum pthread_mutextype m_type; 158 int m_protocol; 159 int m_ceiling; 160 int m_flags; 161 }; 162 163 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 164 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 165 166 struct pthread_cond { 167 /* 168 * Lock for accesses to this structure. 169 */ 170 volatile umtx_t c_lock; 171 volatile umtx_t c_seqno; 172 volatile int c_waiters; 173 volatile int c_wakeups; 174 int c_pshared; 175 int c_clockid; 176 }; 177 178 struct pthread_cond_attr { 179 int c_pshared; 180 int c_clockid; 181 }; 182 183 /* 184 * Flags for condition variables. 185 */ 186 #define COND_FLAGS_PRIVATE 0x01 187 #define COND_FLAGS_INITED 0x02 188 189 struct pthread_barrier { 190 volatile umtx_t b_lock; 191 volatile umtx_t b_cycle; 192 volatile int b_count; 193 volatile int b_waiters; 194 }; 195 196 struct pthread_barrierattr { 197 int pshared; 198 }; 199 200 struct pthread_spinlock { 201 volatile umtx_t s_lock; 202 }; 203 204 /* 205 * Cleanup definitions. 206 */ 207 struct pthread_cleanup { 208 struct pthread_cleanup *next; 209 void (*routine)(void *); 210 void *routine_arg; 211 int onstack; 212 }; 213 214 #define THR_CLEANUP_PUSH(td, func, arg) { \ 215 struct pthread_cleanup __cup; \ 216 \ 217 __cup.routine = func; \ 218 __cup.routine_arg = arg; \ 219 __cup.onstack = 1; \ 220 __cup.next = (td)->cleanup; \ 221 (td)->cleanup = &__cup; 222 223 #define THR_CLEANUP_POP(td, exec) \ 224 (td)->cleanup = __cup.next; \ 225 if ((exec) != 0) \ 226 __cup.routine(__cup.routine_arg); \ 227 } 228 229 struct pthread_atfork { 230 TAILQ_ENTRY(pthread_atfork) qe; 231 void (*prepare)(void); 232 void (*parent)(void); 233 void (*child)(void); 234 }; 235 236 struct pthread_attr { 237 int sched_policy; 238 int sched_inherit; 239 int sched_interval; 240 int prio; 241 int suspend; 242 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 243 int flags; 244 void *stackaddr_attr; 245 size_t stacksize_attr; 246 size_t guardsize_attr; 247 }; 248 249 /* 250 * Thread creation state attributes. 251 */ 252 #define THR_CREATE_RUNNING 0 253 #define THR_CREATE_SUSPENDED 1 254 255 /* 256 * Miscellaneous definitions. 257 */ 258 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 259 260 /* 261 * Maximum size of initial thread's stack. This perhaps deserves to be larger 262 * than the stacks of other threads, since many applications are likely to run 263 * almost entirely on this stack. 264 */ 265 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 266 267 /* 268 * Define the different priority ranges. All applications have thread 269 * priorities constrained within 0-31. The threads library raises the 270 * priority when delivering signals in order to ensure that signal 271 * delivery happens (from the POSIX spec) "as soon as possible". 272 * In the future, the threads library will also be able to map specific 273 * threads into real-time (cooperating) processes or kernel threads. 274 * The RT and SIGNAL priorities will be used internally and added to 275 * thread base priorities so that the scheduling queue can handle both 276 * normal and RT priority threads with and without signal handling. 277 * 278 * The approach taken is that, within each class, signal delivery 279 * always has priority over thread execution. 280 */ 281 #define THR_DEFAULT_PRIORITY 15 282 #define THR_MIN_PRIORITY 0 283 #define THR_MAX_PRIORITY 31 /* 0x1F */ 284 #define THR_SIGNAL_PRIORITY 32 /* 0x20 */ 285 #define THR_RT_PRIORITY 64 /* 0x40 */ 286 #define THR_FIRST_PRIORITY THR_MIN_PRIORITY 287 #define THR_LAST_PRIORITY \ 288 (THR_MAX_PRIORITY + THR_SIGNAL_PRIORITY + THR_RT_PRIORITY) 289 #define THR_BASE_PRIORITY(prio) ((prio) & THR_MAX_PRIORITY) 290 291 /* 292 * Time slice period in microseconds. 293 */ 294 #define TIMESLICE_USEC 20000 295 296 struct pthread_rwlockattr { 297 int pshared; 298 }; 299 300 struct pthread_rwlock { 301 pthread_mutex_t lock; /* monitor lock */ 302 pthread_cond_t read_signal; 303 pthread_cond_t write_signal; 304 int state; /* 0 = idle >0 = # of readers -1 = writer */ 305 int blocked_writers; 306 }; 307 308 /* 309 * Thread states. 310 */ 311 enum pthread_state { 312 PS_RUNNING, 313 PS_DEAD 314 }; 315 316 struct pthread_specific_elem { 317 const void *data; 318 int seqno; 319 }; 320 321 struct pthread_key { 322 volatile int allocated; 323 volatile int count; 324 int seqno; 325 void (*destructor)(void *); 326 }; 327 328 /* 329 * Thread structure. 330 */ 331 struct pthread { 332 /* 333 * Magic value to help recognize a valid thread structure 334 * from an invalid one: 335 */ 336 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 337 u_int32_t magic; 338 char *name; 339 u_int64_t uniqueid; /* for gdb */ 340 341 /* 342 * Lock for accesses to this thread structure. 343 */ 344 umtx_t lock; 345 346 /* Thread is terminated in kernel, written by kernel. */ 347 long terminated; 348 349 /* Kernel thread id. */ 350 long tid; 351 352 /* Internal condition variable cycle number. */ 353 umtx_t cycle; 354 355 /* How many low level locks the thread held. */ 356 int locklevel; 357 358 /* 359 * Set to non-zero when this thread has entered a critical 360 * region. We allow for recursive entries into critical regions. 361 */ 362 int critical_count; 363 364 /* Signal blocked counter. */ 365 int sigblock; 366 367 /* Queue entry for list of all threads. */ 368 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 369 370 /* Queue entry for GC lists. */ 371 TAILQ_ENTRY(pthread) gcle; 372 373 /* Hash queue entry. */ 374 LIST_ENTRY(pthread) hle; 375 376 /* Threads reference count. */ 377 int refcount; 378 379 /* 380 * Thread start routine, argument, stack pointer and thread 381 * attributes. 382 */ 383 void *(*start_routine)(void *); 384 void *arg; 385 struct pthread_attr attr; 386 387 /* 388 * Cancelability flags 389 */ 390 #define THR_CANCEL_DISABLE 0x0001 391 #define THR_CANCEL_EXITING 0x0002 392 #define THR_CANCEL_AT_POINT 0x0004 393 #define THR_CANCEL_NEEDED 0x0008 394 #define SHOULD_CANCEL(val) \ 395 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 396 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED) 397 398 #define SHOULD_ASYNC_CANCEL(val) \ 399 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \ 400 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \ 401 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) 402 int cancelflags; 403 404 /* Thread temporary signal mask. */ 405 sigset_t sigmask; 406 407 /* Thread state: */ 408 umtx_t state; 409 410 /* 411 * Error variable used instead of errno, used for internal. 412 */ 413 int error; 414 415 /* 416 * The joiner is the thread that is joining to this thread. The 417 * join status keeps track of a join operation to another thread. 418 */ 419 struct pthread *joiner; 420 421 /* 422 * The current thread can belong to a priority mutex queue. 423 * This is the synchronization queue link. 424 */ 425 TAILQ_ENTRY(pthread) sqe; 426 427 /* Miscellaneous flags; only set with scheduling lock held. */ 428 int flags; 429 #define THR_FLAGS_PRIVATE 0x0001 430 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 431 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 432 433 /* Thread list flags; only set with thread list lock held. */ 434 int tlflags; 435 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 436 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 437 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 438 #define TLFLAGS_DETACHED 0x0008 /* thread is detached */ 439 440 /* 441 * Base priority is the user setable and retrievable priority 442 * of the thread. It is only affected by explicit calls to 443 * set thread priority and upon thread creation via a thread 444 * attribute or default priority. 445 */ 446 char base_priority; 447 448 /* 449 * Inherited priority is the priority a thread inherits by 450 * taking a priority inheritence or protection mutex. It 451 * is not affected by base priority changes. Inherited 452 * priority defaults to and remains 0 until a mutex is taken 453 * that is being waited on by any other thread whose priority 454 * is non-zero. 455 */ 456 char inherited_priority; 457 458 /* 459 * Active priority is always the maximum of the threads base 460 * priority and inherited priority. When there is a change 461 * in either the base or inherited priority, the active 462 * priority must be recalculated. 463 */ 464 char active_priority; 465 466 /* Number of priority ceiling or protection mutexes owned. */ 467 int priority_mutex_count; 468 469 /* Queue of currently owned simple type mutexes. */ 470 TAILQ_HEAD(, pthread_mutex) mutexq; 471 472 void *ret; 473 struct pthread_specific_elem *specific; 474 int specific_data_count; 475 476 /* Number rwlocks rdlocks held. */ 477 int rdlock_count; 478 479 /* 480 * Current locks bitmap for rtld. */ 481 int rtld_bits; 482 483 /* Thread control block */ 484 struct tls_tcb *tcb; 485 486 /* Cleanup handlers Link List */ 487 struct pthread_cleanup *cleanup; 488 489 /* Enable event reporting */ 490 int report_events; 491 492 /* Event mask */ 493 td_thr_events_t event_mask; 494 495 /* Event */ 496 td_event_msg_t event_buf; 497 }; 498 499 #define THR_IN_CRITICAL(thrd) \ 500 (((thrd)->locklevel > 0) || \ 501 ((thrd)->critical_count > 0)) 502 503 #define THR_UMTX_TRYLOCK(thrd, lck) \ 504 _thr_umtx_trylock((lck), (thrd)->tid) 505 506 #define THR_UMTX_LOCK(thrd, lck) \ 507 _thr_umtx_lock((lck), (thrd)->tid) 508 509 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \ 510 _thr_umtx_timedlock((lck), (thrd)->tid, (timo)) 511 512 #define THR_UMTX_UNLOCK(thrd, lck) \ 513 _thr_umtx_unlock((lck), (thrd)->tid) 514 515 #define THR_LOCK_ACQUIRE(thrd, lck) \ 516 do { \ 517 (thrd)->locklevel++; \ 518 _thr_umtx_lock((lck), (thrd)->tid); \ 519 } while (0) 520 521 #ifdef _PTHREADS_INVARIANTS 522 #define THR_ASSERT_LOCKLEVEL(thrd) \ 523 do { \ 524 if (__predict_false((thrd)->locklevel <= 0)) \ 525 _thr_assert_lock_level(); \ 526 } while (0) 527 #else 528 #define THR_ASSERT_LOCKLEVEL(thrd) 529 #endif 530 531 #define THR_LOCK_RELEASE(thrd, lck) \ 532 do { \ 533 THR_ASSERT_LOCKLEVEL(thrd); \ 534 _thr_umtx_unlock((lck), (thrd)->tid); \ 535 (thrd)->locklevel--; \ 536 _thr_ast(thrd); \ 537 } while (0) 538 539 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 540 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 541 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 542 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 543 544 #define THREAD_LIST_LOCK(curthrd) \ 545 do { \ 546 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \ 547 } while (0) 548 549 #define THREAD_LIST_UNLOCK(curthrd) \ 550 do { \ 551 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \ 552 } while (0) 553 554 /* 555 * Macros to insert/remove threads to the all thread list and 556 * the gc list. 557 */ 558 #define THR_LIST_ADD(thrd) do { \ 559 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 560 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 561 _thr_hash_add(thrd); \ 562 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 563 } \ 564 } while (0) 565 #define THR_LIST_REMOVE(thrd) do { \ 566 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 567 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 568 _thr_hash_remove(thrd); \ 569 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 570 } \ 571 } while (0) 572 #define THR_GCLIST_ADD(thrd) do { \ 573 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 574 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 575 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 576 _thr_gc_count++; \ 577 } \ 578 } while (0) 579 #define THR_GCLIST_REMOVE(thrd) do { \ 580 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 581 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 582 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 583 _thr_gc_count--; \ 584 } \ 585 } while (0) 586 587 #define GC_NEEDED() (_thr_gc_count >= 5) 588 589 #define THR_IN_SYNCQ(thrd) (((thrd)->sflags & THR_FLAGS_IN_SYNCQ) != 0) 590 591 #define SHOULD_REPORT_EVENT(curthr, e) \ 592 (curthr->report_events && \ 593 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 594 595 extern int __isthreaded; 596 597 /* 598 * Global variables for the pthread library. 599 */ 600 extern char *_usrstack; 601 extern struct pthread *_thr_initial; 602 extern int _thread_scope_system; 603 604 /* For debugger */ 605 extern int _libthread_xu_debug; 606 extern int _thread_event_mask; 607 extern struct pthread *_thread_last_event; 608 609 /* List of all threads */ 610 extern struct thread_head _thread_list; 611 612 /* List of threads needing GC */ 613 extern struct thread_head _thread_gc_list; 614 615 extern int _thread_active_threads; 616 617 extern struct atfork_head _thr_atfork_list; 618 extern umtx_t _thr_atfork_lock; 619 620 /* Default thread attributes */ 621 extern struct pthread_attr _pthread_attr_default; 622 623 /* Default mutex attributes */ 624 extern struct pthread_mutex_attr _pthread_mutexattr_default; 625 626 /* Default condition variable attributes */ 627 extern struct pthread_cond_attr _pthread_condattr_default; 628 629 extern pid_t _thr_pid; 630 extern size_t _thr_guard_default; 631 extern size_t _thr_stack_default; 632 extern size_t _thr_stack_initial; 633 extern int _thr_page_size; 634 extern int _thr_gc_count; 635 636 extern umtx_t _mutex_static_lock; 637 extern umtx_t _cond_static_lock; 638 extern umtx_t _rwlock_static_lock; 639 extern umtx_t _keytable_lock; 640 extern umtx_t _thr_list_lock; 641 extern umtx_t _thr_event_lock; 642 643 /* 644 * Function prototype definitions. 645 */ 646 __BEGIN_DECLS 647 int _thr_setthreaded(int); 648 int _mutex_cv_lock(pthread_mutex_t *, int count); 649 int _mutex_cv_unlock(pthread_mutex_t *, int *count); 650 void _mutex_notify_priochange(struct pthread *, struct pthread *, int); 651 int _mutex_reinit(pthread_mutex_t *); 652 void _mutex_fork(struct pthread *curthread); 653 void _mutex_unlock_private(struct pthread *); 654 void _libpthread_init(struct pthread *); 655 struct pthread *_thr_alloc(struct pthread *); 656 void _thread_exit(const char *, int, const char *) __dead2; 657 void _thr_exit_cleanup(void); 658 int _thr_ref_add(struct pthread *, struct pthread *, int); 659 void _thr_ref_delete(struct pthread *, struct pthread *); 660 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *); 661 int _thr_find_thread(struct pthread *, struct pthread *, int); 662 void _thr_rtld_init(void); 663 void _thr_rtld_fini(void); 664 int _thr_stack_alloc(struct pthread_attr *); 665 void _thr_stack_free(struct pthread_attr *); 666 void _thr_free(struct pthread *, struct pthread *); 667 void _thr_gc(struct pthread *); 668 void _thread_cleanupspecific(void); 669 void _thread_dump_info(void); 670 void _thread_printf(int, const char *, ...); 671 void _thr_spinlock_init(void); 672 int _thr_cancel_enter(struct pthread *); 673 void _thr_cancel_leave(struct pthread *, int); 674 void _thr_signal_block(struct pthread *); 675 void _thr_signal_unblock(struct pthread *); 676 void _thr_signal_init(void); 677 void _thr_signal_deinit(void); 678 int _thr_send_sig(struct pthread *, int sig); 679 void _thr_list_init(void); 680 void _thr_hash_add(struct pthread *); 681 void _thr_hash_remove(struct pthread *); 682 struct pthread *_thr_hash_find(struct pthread *); 683 void _thr_link(struct pthread *curthread, struct pthread *thread); 684 void _thr_unlink(struct pthread *curthread, struct pthread *thread); 685 void _thr_suspend_check(struct pthread *curthread); 686 void _thr_assert_lock_level(void) __dead2; 687 void _thr_ast(struct pthread *); 688 int _thr_get_tid(void); 689 void _thr_report_creation(struct pthread *curthread, 690 struct pthread *newthread); 691 void _thr_report_death(struct pthread *curthread); 692 void _thread_bp_create(void); 693 void _thread_bp_death(void); 694 695 /* #include <sys/aio.h> */ 696 #ifdef _SYS_AIO_H_ 697 int __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *); 698 #endif 699 700 /* #include <fcntl.h> */ 701 #ifdef _SYS_FCNTL_H_ 702 int __sys_fcntl(int, int, ...); 703 int __sys_open(const char *, int, ...); 704 #endif 705 706 /* #include <sys/ioctl.h> */ 707 #ifdef _SYS_IOCTL_H_ 708 int __sys_ioctl(int, unsigned long, ...); 709 #endif 710 711 /* #inclde <sched.h> */ 712 #ifdef _SCHED_H_ 713 int __sys_sched_yield(void); 714 #endif 715 716 /* #include <signal.h> */ 717 #ifdef _SIGNAL_H_ 718 int __sys_kill(pid_t, int); 719 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 720 int __sys_sigpending(sigset_t *); 721 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 722 int __sys_sigsuspend(const sigset_t *); 723 int __sys_sigreturn(ucontext_t *); 724 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 725 #endif 726 727 /* #include <sys/socket.h> */ 728 #ifdef _SYS_SOCKET_H_ 729 int __sys_accept(int, struct sockaddr *, socklen_t *); 730 int __sys_connect(int, const struct sockaddr *, socklen_t); 731 ssize_t __sys_recv(int, void *, size_t, int); 732 ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 733 ssize_t __sys_recvmsg(int, struct msghdr *, int); 734 int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, 735 off_t *, int); 736 ssize_t __sys_sendmsg(int, const struct msghdr *, int); 737 ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 738 #endif 739 740 /* #include <sys/uio.h> */ 741 #ifdef _SYS_UIO_H_ 742 ssize_t __sys_readv(int, const struct iovec *, int); 743 ssize_t __sys_writev(int, const struct iovec *, int); 744 #endif 745 746 /* #include <time.h> */ 747 #ifdef _TIME_H_ 748 int __sys_nanosleep(const struct timespec *, struct timespec *); 749 #endif 750 751 /* #include <unistd.h> */ 752 #ifdef _UNISTD_H_ 753 int __sys_close(int); 754 int __sys_execve(const char *, char * const *, char * const *); 755 int __sys_fork(void); 756 int __sys_fsync(int); 757 pid_t __sys_getpid(void); 758 int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 759 ssize_t __sys_read(int, void *, size_t); 760 ssize_t __sys_write(int, const void *, size_t); 761 void __sys_exit(int); 762 int __sys_sigwait(const sigset_t *, int *); 763 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 764 const struct timespec *); 765 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 766 #endif 767 768 /* #include <poll.h> */ 769 #ifdef _SYS_POLL_H_ 770 int __sys_poll(struct pollfd *, unsigned, int); 771 #endif 772 773 /* #include <sys/mman.h> */ 774 #ifdef _SYS_MMAN_H_ 775 int __sys_msync(void *, size_t, int); 776 #endif 777 778 static inline int 779 _thr_isthreaded(void) 780 { 781 return (__isthreaded != 0); 782 } 783 784 static inline int 785 _thr_is_inited(void) 786 { 787 return (_thr_initial != 0); 788 } 789 790 static inline void 791 _thr_check_init(void) 792 { 793 if (_thr_initial == 0) 794 _libpthread_init(0); 795 } 796 797 __END_DECLS 798 799 #endif /* !_THR_PRIVATE_H */ 800