thr_private.h revision 123348
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: head/lib/libthr/thread/thr_private.h 123348 2003-12-09 11:04:36Z mtm $ 35 */ 36 37#ifndef _THR_PRIVATE_H 38#define _THR_PRIVATE_H 39 40/* 41 * Evaluate the storage class specifier. 42 */ 43#ifdef GLOBAL_PTHREAD_PRIVATE 44#define SCLASS 45#else 46#define SCLASS extern 47#endif 48 49/* 50 * Include files. 51 */ 52#include <sys/types.h> 53#include <sys/cdefs.h> 54#include <sys/errno.h> 55#include <sys/time.h> 56#include <sys/queue.h> 57#include <pthread_np.h> 58#include <sched.h> 59#include <signal.h> 60#include <spinlock.h> 61#include <stdio.h> 62#include <ucontext.h> 63#include <unistd.h> 64 65#include <machine/atomic.h> 66#include <sys/thr.h> 67#include <sys/umtx.h> 68 69/* 70 * Kernel fatal error handler macro. 71 */ 72#ifndef _PTHREADS_INVARIANTS 73#define PANIC(string) _thread_exit(__FILE__, __LINE__, (string)) 74#else /* _PTHREADS_INVARIANTS */ 75#define PANIC(string) \ 76 do { \ 77 _thread_printf(STDOUT_FILENO, (string)); \ 78 _thread_printf(STDOUT_FILENO, \ 79 "\nAbnormal termination, file: %s, line: %d\n", \ 80 __FILE__, __LINE__); \ 81 abort(); \ 82 } while (0) 83#endif /* !_PTHREADS_INVARIANTS */ 84 85/* Output debug messages like this: */ 86#define stdout_debug(args...) _thread_printf(STDOUT_FILENO, args) 87#define stderr_debug(args...) _thread_printf(STDOUT_FILENO, args) 88 89/* 90 * Currently executing thread. 91 */ 92#define curthread _get_curthread() 93 94/* 95 * Locking macros 96 */ 97#define UMTX_LOCK(m) \ 98 do { \ 99 if (umtx_lock((m), curthread->thr_id) != 0) \ 100 abort(); \ 101 } while (0) 102 103#define UMTX_TRYLOCK(m, r) \ 104 do { \ 105 (r) = umtx_trylock((m), curthread->thr_id); \ 106 if ((r) != 0 && (r) != EBUSY) \ 107 abort(); \ 108 } while (0) 109 110#define UMTX_UNLOCK(m) \ 111 do { \ 112 if (umtx_unlock((m), curthread->thr_id) != 0) \ 113 abort(); \ 114 } while (0) 115 116 117/* 118 * State change macro without scheduling queue change: 119 */ 120#define PTHREAD_SET_STATE(thrd, newstate) do { \ 121 (thrd)->state = newstate; \ 122 (thrd)->fname = __FILE__; \ 123 (thrd)->lineno = __LINE__; \ 124} while (0) 125 126/* 127 * State change macro with scheduling queue change - This must be 128 * called with GIANT held. 129 */ 130#if defined(_PTHREADS_INVARIANTS) 131#include <assert.h> 132#define PTHREAD_ASSERT(cond, msg) do { \ 133 if (!(cond)) \ 134 PANIC(msg); \ 135} while (0) 136#define PTHREAD_ASSERT_NOT_IN_SYNCQ(thrd) \ 137 PTHREAD_ASSERT((((thrd)->flags & PTHREAD_FLAGS_IN_SYNCQ) == 0), \ 138 "Illegal call from signal handler"); 139#define PTHREAD_NEW_STATE(thrd, newstate) do { \ 140 if ((thrd)->state != newstate) { \ 141 if ((thrd)->state == PS_RUNNING) { \ 142 PTHREAD_SET_STATE(thrd, newstate); \ 143 } else if (newstate == PS_RUNNING) { \ 144 if (thr_kill(thrd->thr_id, SIGTHR)) \ 145 abort(); \ 146 PTHREAD_SET_STATE(thrd, newstate); \ 147 } \ 148 } \ 149} while (0) 150#else 151#define PTHREAD_ASSERT(cond, msg) 152#define PTHREAD_ASSERT_NOT_IN_SYNCQ(thrd) 153#define PTHREAD_NEW_STATE(thrd, newstate) do { \ 154 if (thr_kill(thrd->thr_id, SIGTHR)) \ 155 abort(); \ 156 PTHREAD_SET_STATE(thrd, newstate); \ 157} while (0) 158#if 0 159#define PTHREAD_NEW_STATE(thrd, newstate) do { \ 160 if ((thrd)->state != newstate) { \ 161 if ((thrd)->state == PS_RUNNING) { \ 162 } else if (newstate == PS_RUNNING) { \ 163 if (thr_kill(thrd->thr_id, SIGTHR)) \ 164 abort(); \ 165 } \ 166 } \ 167 PTHREAD_SET_STATE(thrd, newstate); \ 168} while (0) 169#endif 170#endif 171 172 173/* 174 * TailQ initialization values. 175 */ 176#define TAILQ_INITIALIZER { NULL, NULL } 177 178#define UMTX_INITIALIZER { NULL } 179 180struct pthread_mutex_attr { 181 enum pthread_mutextype m_type; 182 int m_protocol; 183 int m_ceiling; 184 long m_flags; 185}; 186 187/* 188 * Static mutex initialization values. 189 */ 190 191#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 192 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 193 194#define PTHREAD_MUTEX_STATIC_INITIALIZER \ 195 { PTHREAD_MUTEXATTR_STATIC_INITIALIZER, UMTX_INITIALIZER, NULL, \ 196 0, 0, TAILQ_INITIALIZER } 197 198union pthread_mutex_data { 199 void *m_ptr; 200 int m_count; 201}; 202 203struct pthread_mutex { 204 enum pthread_mutextype m_type; 205 int m_protocol; 206 TAILQ_HEAD(mutex_head, pthread) m_queue; 207 struct pthread *m_owner; 208 union pthread_mutex_data m_data; 209 long m_flags; 210 int m_refcount; 211 212 /* 213 * Used for priority inheritence and protection. 214 * 215 * m_prio - For priority inheritence, the highest active 216 * priority (threads locking the mutex inherit 217 * this priority). For priority protection, the 218 * ceiling priority of this mutex. 219 * m_saved_prio - mutex owners inherited priority before 220 * taking the mutex, restored when the owner 221 * unlocks the mutex. 222 */ 223 int m_prio; 224 int m_saved_prio; 225 226 /* 227 * Link for list of all mutexes a thread currently owns. 228 */ 229 TAILQ_ENTRY(pthread_mutex) m_qe; 230 231 /* 232 * Lock for accesses to this structure. 233 */ 234 spinlock_t lock; 235}; 236 237/* 238 * Flags for mutexes. 239 */ 240#define MUTEX_FLAGS_PRIVATE 0x01 241#define MUTEX_FLAGS_INITED 0x02 242#define MUTEX_FLAGS_BUSY 0x04 243 244/* 245 * Condition variable definitions. 246 */ 247enum pthread_cond_type { 248 COND_TYPE_FAST, 249 COND_TYPE_MAX 250}; 251 252struct pthread_cond { 253 enum pthread_cond_type c_type; 254 TAILQ_HEAD(cond_head, pthread) c_queue; 255 pthread_mutex_t c_mutex; 256 void *c_data; 257 long c_flags; 258 int c_seqno; 259 260 /* 261 * Lock for accesses to this structure. 262 */ 263 struct umtx c_lock; 264}; 265 266struct pthread_cond_attr { 267 enum pthread_cond_type c_type; 268 long c_flags; 269}; 270 271/* 272 * Flags for condition variables. 273 */ 274#define COND_FLAGS_INITED 0x01 275 276/* 277 * Static cond initialization values. 278 */ 279#define PTHREAD_COND_STATIC_INITIALIZER \ 280 { COND_TYPE_FAST, TAILQ_INITIALIZER, NULL, NULL, \ 281 0, 0, UMTX_INITIALIZER } 282 283/* 284 * Semaphore definitions. 285 */ 286struct sem { 287#define SEM_MAGIC ((u_int32_t) 0x09fa4012) 288 u_int32_t magic; 289 pthread_mutex_t lock; 290 pthread_cond_t gtzero; 291 u_int32_t count; 292 u_int32_t nwaiters; 293}; 294 295/* 296 * Cleanup definitions. 297 */ 298struct pthread_cleanup { 299 struct pthread_cleanup *next; 300 void (*routine) (); 301 void *routine_arg; 302}; 303 304struct pthread_attr { 305 int sched_policy; 306 int sched_inherit; 307 int sched_interval; 308 int prio; 309 int suspend; 310 int flags; 311 void *arg_attr; 312 void (*cleanup_attr) (); 313 void *stackaddr_attr; 314 size_t stacksize_attr; 315 size_t guardsize_attr; 316}; 317 318/* 319 * Thread creation state attributes. 320 */ 321#define PTHREAD_CREATE_RUNNING 0 322#define PTHREAD_CREATE_SUSPENDED 1 323 324/* 325 * Miscellaneous definitions. 326 */ 327#define PTHREAD_STACK_DEFAULT 65536 328/* 329 * Size of default red zone at the end of each stack. In actuality, this "red 330 * zone" is merely an unmapped region, except in the case of the initial stack. 331 * Since mmap() makes it possible to specify the maximum growth of a MAP_STACK 332 * region, an unmapped gap between thread stacks achieves the same effect as 333 * explicitly mapped red zones. 334 * This is declared and initialized in uthread_init.c. 335 */ 336extern int _pthread_guard_default; 337 338extern int _pthread_page_size; 339 340/* 341 * Maximum size of initial thread's stack. This perhaps deserves to be larger 342 * than the stacks of other threads, since many applications are likely to run 343 * almost entirely on this stack. 344 */ 345#define PTHREAD_STACK_INITIAL 0x100000 346 347/* 348 * Define the different priority ranges. All applications have thread 349 * priorities constrained within 0-31. The threads library raises the 350 * priority when delivering signals in order to ensure that signal 351 * delivery happens (from the POSIX spec) "as soon as possible". 352 * In the future, the threads library will also be able to map specific 353 * threads into real-time (cooperating) processes or kernel threads. 354 * The RT and SIGNAL priorities will be used internally and added to 355 * thread base priorities so that the scheduling queue can handle both 356 * normal and RT priority threads with and without signal handling. 357 * 358 * The approach taken is that, within each class, signal delivery 359 * always has priority over thread execution. 360 */ 361#define PTHREAD_DEFAULT_PRIORITY 15 362#define PTHREAD_MIN_PRIORITY 0 363#define PTHREAD_MAX_PRIORITY 31 /* 0x1F */ 364#define PTHREAD_SIGNAL_PRIORITY 32 /* 0x20 */ 365#define PTHREAD_RT_PRIORITY 64 /* 0x40 */ 366#define PTHREAD_FIRST_PRIORITY PTHREAD_MIN_PRIORITY 367#define PTHREAD_LAST_PRIORITY \ 368 (PTHREAD_MAX_PRIORITY + PTHREAD_SIGNAL_PRIORITY + PTHREAD_RT_PRIORITY) 369#define PTHREAD_BASE_PRIORITY(prio) ((prio) & PTHREAD_MAX_PRIORITY) 370 371/* 372 * Clock resolution in microseconds. 373 */ 374#define CLOCK_RES_USEC 10000 375#define CLOCK_RES_USEC_MIN 1000 376 377/* 378 * Time slice period in microseconds. 379 */ 380#define TIMESLICE_USEC 20000 381 382/* 383 * XXX Define a thread-safe macro to get the current time of day 384 * which is updated at regular intervals by the scheduling signal 385 * handler. 386 */ 387#define GET_CURRENT_TOD(tv) gettimeofday(&(tv), NULL) 388 389 390struct pthread_rwlockattr { 391 int pshared; 392}; 393 394struct pthread_rwlock { 395 pthread_mutex_t lock; /* monitor lock */ 396 int state; /* 0 = idle >0 = # of readers -1 = writer */ 397 pthread_cond_t read_signal; 398 pthread_cond_t write_signal; 399 int blocked_writers; 400}; 401 402/* 403 * Thread states. 404 */ 405enum pthread_state { 406 PS_RUNNING, 407 PS_MUTEX_WAIT, 408 PS_COND_WAIT, 409 PS_SLEEP_WAIT, /* XXX We need to wrap syscalls to set this state */ 410 PS_WAIT_WAIT, 411 PS_JOIN, 412 PS_DEAD, 413 PS_DEADLOCK, 414 PS_STATE_MAX 415}; 416 417 418/* 419 * File descriptor locking definitions. 420 */ 421#define FD_READ 0x1 422#define FD_WRITE 0x2 423#define FD_RDWR (FD_READ | FD_WRITE) 424 425union pthread_wait_data { 426 pthread_mutex_t mutex; 427 pthread_cond_t cond; 428 spinlock_t *spinlock; 429 struct pthread *thread; 430}; 431 432struct join_status { 433 struct pthread *thread; 434 void *ret; 435 int error; 436}; 437 438struct pthread_state_data { 439 union pthread_wait_data psd_wait_data; 440 enum pthread_state psd_state; 441 int psd_flags; 442}; 443 444struct pthread_specific_elem { 445 const void *data; 446 int seqno; 447}; 448 449/* 450 * Thread structure. 451 */ 452struct pthread { 453 /* 454 * Magic value to help recognize a valid thread structure 455 * from an invalid one: 456 */ 457#define PTHREAD_MAGIC ((u_int32_t) 0xd09ba115) 458 u_int32_t magic; 459 char *name; 460 u_int64_t uniqueid; /* for gdb */ 461 thr_id_t thr_id; 462 sigset_t savedsig; 463 int signest; /* blocked signal netsting level */ 464 465 /* 466 * Lock for accesses to this thread structure. 467 */ 468 struct umtx lock; 469 470 /* Queue entry for list of all threads: */ 471 TAILQ_ENTRY(pthread) tle; 472 473 /* Queue entry for list of dead threads: */ 474 TAILQ_ENTRY(pthread) dle; 475 476 /* 477 * Thread start routine, argument, stack pointer and thread 478 * attributes. 479 */ 480 void *(*start_routine)(void *); 481 void *arg; 482 void *stack; 483 struct pthread_attr attr; 484 485 /* 486 * Machine context, including signal state. 487 */ 488 ucontext_t ctx; 489 490 /* 491 * Cancelability flags - the lower 2 bits are used by cancel 492 * definitions in pthread.h 493 */ 494#define PTHREAD_AT_CANCEL_POINT 0x0004 495#define PTHREAD_CANCELLING 0x0008 496 497 /* 498 * Protected by Giant. 499 */ 500 int cancelflags; 501 502 /* Thread state: */ 503 enum pthread_state state; 504 505 /* 506 * Error variable used instead of errno. The function __error() 507 * returns a pointer to this. 508 */ 509 int error; 510 511 /* 512 * The joiner is the thread that is joining to this thread. The 513 * join status keeps track of a join operation to another thread. 514 */ 515 struct pthread *joiner; 516 struct join_status join_status; 517 518 /* 519 * A thread can belong to: 520 * 521 * o A queue of threads waiting for a mutex 522 * o A queue of threads waiting for a condition variable 523 * 524 * A thread can also be joining a thread (the joiner field above). 525 * 526 * It must not be possible for a thread to belong to any of the 527 * above queues while it is handling a signal. Signal handlers 528 * may longjmp back to previous stack frames circumventing normal 529 * control flow. This could corrupt queue integrity if the thread 530 * retains membership in the queue. Therefore, if a thread is a 531 * member of one of these queues when a signal handler is invoked, 532 * it must remove itself from the queue before calling the signal 533 * handler and reinsert itself after normal return of the handler. 534 * 535 * Use sqe for synchronization (mutex and condition variable) queue 536 * links. 537 */ 538 TAILQ_ENTRY(pthread) sqe; /* synchronization queue link */ 539 540 /* Wait data. */ 541 union pthread_wait_data data; 542 543 /* Miscellaneous flags; only set with signals deferred. */ 544 int flags; 545#define PTHREAD_FLAGS_PRIVATE 0x0001 546#define PTHREAD_EXITING 0x0002 547#define PTHREAD_FLAGS_IN_CONDQ 0x0080 /* in condition queue using sqe link*/ 548#define PTHREAD_FLAGS_IN_MUTEXQ 0x0100 /* in mutex queue using sqe link */ 549#define PTHREAD_FLAGS_SUSPENDED 0x0200 /* thread is suspended */ 550#define PTHREAD_FLAGS_TRACE 0x0400 /* for debugging purposes */ 551#define PTHREAD_FLAGS_IN_SYNCQ \ 552 (PTHREAD_FLAGS_IN_CONDQ | PTHREAD_FLAGS_IN_MUTEXQ) 553 554 /* 555 * Base priority is the user setable and retrievable priority 556 * of the thread. It is only affected by explicit calls to 557 * set thread priority and upon thread creation via a thread 558 * attribute or default priority. 559 */ 560 char base_priority; 561 562 /* 563 * Inherited priority is the priority a thread inherits by 564 * taking a priority inheritence or protection mutex. It 565 * is not affected by base priority changes. Inherited 566 * priority defaults to and remains 0 until a mutex is taken 567 * that is being waited on by any other thread whose priority 568 * is non-zero. 569 */ 570 char inherited_priority; 571 572 /* 573 * Active priority is always the maximum of the threads base 574 * priority and inherited priority. When there is a change 575 * in either the base or inherited priority, the active 576 * priority must be recalculated. 577 */ 578 char active_priority; 579 580 /* Number of priority ceiling or protection mutexes owned. */ 581 int priority_mutex_count; 582 583 /* 584 * Queue of currently owned mutexes. 585 */ 586 TAILQ_HEAD(, pthread_mutex) mutexq; 587 588 void *ret; 589 struct pthread_specific_elem *specific; 590 int specific_data_count; 591 592 /* 593 * Architecture specific id field used for _{get, set}_curthread() 594 * interface. 595 */ 596 void *arch_id; 597 598 /* Cleanup handlers Link List */ 599 struct pthread_cleanup *cleanup; 600 char *fname; /* Ptr to source file name */ 601 int lineno; /* Source line number. */ 602}; 603 604/* 605 * Global variables for the uthread kernel. 606 */ 607 608SCLASS void *_usrstack 609#ifdef GLOBAL_PTHREAD_PRIVATE 610= (void *) USRSTACK; 611#else 612; 613#endif 614 615SCLASS spinlock_t stack_lock 616#ifdef GLOBAL_PTHREAD_PRIVATE 617= _SPINLOCK_INITIALIZER 618#endif 619; 620#define STACK_LOCK _SPINLOCK(&stack_lock); 621#define STACK_UNLOCK _SPINUNLOCK(&stack_lock); 622 623/* List of all threads: */ 624SCLASS TAILQ_HEAD(, pthread) _thread_list 625#ifdef GLOBAL_PTHREAD_PRIVATE 626= TAILQ_HEAD_INITIALIZER(_thread_list); 627#else 628; 629#endif 630 631/* Dead threads: */ 632SCLASS TAILQ_HEAD(, pthread) _dead_list 633#ifdef GLOBAL_PTHREAD_PRIVATE 634= TAILQ_HEAD_INITIALIZER(_dead_list); 635#else 636; 637#endif 638 639/* 640 * These two locks protect the global active threads list and 641 * the global dead threads list, respectively. Combining these 642 * into one lock for both lists doesn't seem wise, since it 643 * would likely increase contention during busy thread creation 644 * and destruction for very little savings in space. 645 * 646 * The lock for the "dead threads list" must be a pthread mutex 647 * because it is used with condition variables to synchronize 648 * the gc thread with active threads in the process of exiting or 649 * dead threads who have just been joined. 650 */ 651SCLASS spinlock_t thread_list_lock 652#ifdef GLOBAL_PTHREAD_PRIVATE 653= _SPINLOCK_INITIALIZER 654#endif 655; 656SCLASS pthread_mutex_t dead_list_lock 657#ifdef GLOBAL_PTHREAD_PRIVATE 658= NULL 659#endif 660; 661 662#define THREAD_LIST_LOCK _SPINLOCK(&thread_list_lock) 663#define THREAD_LIST_UNLOCK _SPINUNLOCK(&thread_list_lock) 664#define DEAD_LIST_LOCK _pthread_mutex_lock(&dead_list_lock) 665#define DEAD_LIST_UNLOCK _pthread_mutex_unlock(&dead_list_lock) 666 667/* Initial thread: */ 668SCLASS struct pthread *_thread_initial 669#ifdef GLOBAL_PTHREAD_PRIVATE 670= NULL; 671#else 672; 673#endif 674 675/* Default thread attributes: */ 676SCLASS struct pthread_attr pthread_attr_default 677#ifdef GLOBAL_PTHREAD_PRIVATE 678= { SCHED_RR, 0, TIMESLICE_USEC, PTHREAD_DEFAULT_PRIORITY, 679 PTHREAD_CREATE_RUNNING, PTHREAD_CREATE_JOINABLE, NULL, NULL, NULL, 680 PTHREAD_STACK_DEFAULT, -1 }; 681#else 682; 683#endif 684 685/* Default mutex attributes: */ 686SCLASS struct pthread_mutex_attr pthread_mutexattr_default 687#ifdef GLOBAL_PTHREAD_PRIVATE 688= { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, 0 }; 689#else 690; 691#endif 692 693/* Default condition variable attributes: */ 694SCLASS struct pthread_cond_attr pthread_condattr_default 695#ifdef GLOBAL_PTHREAD_PRIVATE 696= { COND_TYPE_FAST, 0 }; 697#else 698; 699#endif 700 701SCLASS int _clock_res_usec /* Clock resolution in usec. */ 702#ifdef GLOBAL_PTHREAD_PRIVATE 703= CLOCK_RES_USEC; 704#else 705; 706#endif 707 708/* Giant lock. */ 709SCLASS struct umtx _giant_mutex 710#ifdef GLOBAL_PTHREAD_PRIVATE 711= UMTX_INITIALIZER 712#endif 713; 714 715SCLASS int _giant_count; 716 717/* Garbage collector condition variable. */ 718SCLASS pthread_cond_t _gc_cond 719#ifdef GLOBAL_PTHREAD_PRIVATE 720= NULL 721#endif 722; 723 724/* 725 * Array of signal actions for this process. 726 */ 727SCLASS struct sigaction _thread_sigact[NSIG]; 728 729/* Precomputed signal set for _thread_suspend. */ 730SCLASS sigset_t _thread_suspend_sigset; 731 732/* Tracks the number of threads blocked while waiting for a spinlock. */ 733SCLASS volatile int _spinblock_count 734#ifdef GLOBAL_PTHREAD_PRIVATE 735= 0 736#endif 737; 738 739/* 740 * And, should we climb the beanstalk, 741 * We'll meet his brother, Giant. 742 */ 743void GIANT_LOCK(pthread_t); 744void GIANT_UNLOCK(pthread_t); 745 746/* Undefine the storage class specifier: */ 747#undef SCLASS 748 749/* 750 * Function prototype definitions. 751 */ 752__BEGIN_DECLS 753char *__ttyname_basic(int); 754char *__ttyname_r_basic(int, char *, size_t); 755char *ttyname_r(int, char *, size_t); 756void _cond_wait_backout(pthread_t); 757int _find_thread(pthread_t); 758pthread_t _get_curthread(void); 759void *_set_curthread(ucontext_t *, struct pthread *, int *); 760void _retire_thread(void *arch_id); 761void *_thread_stack_alloc(size_t, size_t); 762void _thread_stack_free(void *, size_t, size_t); 763int _thread_create(pthread_t *,const pthread_attr_t *,void *(*start_routine)(void *),void *,pthread_t); 764int _mutex_cv_lock(pthread_mutex_t *); 765int _mutex_cv_unlock(pthread_mutex_t *); 766void _mutex_lock_backout(pthread_t); 767void _mutex_notify_priochange(pthread_t); 768int _mutex_reinit(pthread_mutex_t *); 769void _mutex_unlock_private(pthread_t); 770int _cond_reinit(pthread_cond_t *); 771void *_pthread_getspecific(pthread_key_t); 772int _pthread_key_create(pthread_key_t *, void (*) (void *)); 773int _pthread_key_delete(pthread_key_t); 774int _pthread_mutex_destroy(pthread_mutex_t *); 775int _pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *); 776int _pthread_mutex_lock(pthread_mutex_t *); 777int _pthread_mutex_trylock(pthread_mutex_t *); 778int _pthread_mutex_unlock(pthread_mutex_t *); 779int _pthread_mutexattr_init(pthread_mutexattr_t *); 780int _pthread_mutexattr_destroy(pthread_mutexattr_t *); 781int _pthread_mutexattr_settype(pthread_mutexattr_t *, int); 782int _pthread_once(pthread_once_t *, void (*) (void)); 783pthread_t _pthread_self(void); 784int _pthread_setspecific(pthread_key_t, const void *); 785void _thread_exit(char *, int, char *); 786void _thread_exit_cleanup(void); 787void *_thread_cleanup(pthread_t); 788void _thread_cleanupspecific(void); 789void _thread_dump_info(void); 790void _thread_init(void); 791void _thread_sig_wrapper(int sig, siginfo_t *info, void *context); 792void _thread_printf(int fd, const char *, ...); 793void _thread_start(void); 794void _thread_seterrno(pthread_t, int); 795pthread_addr_t _thread_gc(pthread_addr_t); 796void _thread_enter_cancellation_point(void); 797void _thread_leave_cancellation_point(void); 798void _thread_cancellation_point(void); 799int _thread_suspend(pthread_t thread, struct timespec *abstime); 800void _thread_critical_enter(pthread_t); 801void _thread_critical_exit(pthread_t); 802void _thread_sigblock(); 803void _thread_sigunblock(); 804void proc_sigact_copyin(int, const struct sigaction *); 805void proc_sigact_copyout(int, struct sigaction *); 806struct sigaction *proc_sigact_sigaction(int); 807 808/* #include <sys/aio.h> */ 809#ifdef _SYS_AIO_H_ 810int __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *); 811#endif 812 813/* #include <sys/event.h> */ 814#ifdef _SYS_EVENT_H_ 815int __sys_kevent(int, const struct kevent *, int, struct kevent *, 816 int, const struct timespec *); 817#endif 818 819/* #include <sys/ioctl.h> */ 820#ifdef _SYS_IOCTL_H_ 821int __sys_ioctl(int, unsigned long, ...); 822#endif 823 824/* #include <sys/mman.h> */ 825#ifdef _SYS_MMAN_H_ 826int __sys_msync(void *, size_t, int); 827#endif 828 829/* #include <sys/mount.h> */ 830#ifdef _SYS_MOUNT_H_ 831int __sys_fstatfs(int, struct statfs *); 832#endif 833 834/* #include <sys/socket.h> */ 835#ifdef _SYS_SOCKET_H_ 836int __sys_accept(int, struct sockaddr *, socklen_t *); 837int __sys_bind(int, const struct sockaddr *, socklen_t); 838int __sys_connect(int, const struct sockaddr *, socklen_t); 839int __sys_getpeername(int, struct sockaddr *, socklen_t *); 840int __sys_getsockname(int, struct sockaddr *, socklen_t *); 841int __sys_getsockopt(int, int, int, void *, socklen_t *); 842int __sys_listen(int, int); 843ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 844ssize_t __sys_recvmsg(int, struct msghdr *, int); 845int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int); 846ssize_t __sys_sendmsg(int, const struct msghdr *, int); 847ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 848int __sys_setsockopt(int, int, int, const void *, socklen_t); 849int __sys_shutdown(int, int); 850int __sys_socket(int, int, int); 851int __sys_socketpair(int, int, int, int *); 852#endif 853 854/* #include <sys/stat.h> */ 855#ifdef _SYS_STAT_H_ 856int __sys_fchflags(int, u_long); 857int __sys_fchmod(int, mode_t); 858int __sys_fstat(int, struct stat *); 859#endif 860 861/* #include <sys/uio.h> */ 862#ifdef _SYS_UIO_H_ 863ssize_t __sys_readv(int, const struct iovec *, int); 864ssize_t __sys_writev(int, const struct iovec *, int); 865#endif 866 867/* #include <sys/wait.h> */ 868#ifdef WNOHANG 869pid_t __sys_wait4(pid_t, int *, int, struct rusage *); 870#endif 871 872/* #include <dirent.h> */ 873#ifdef _DIRENT_H_ 874int __sys_getdirentries(int, char *, int, long *); 875#endif 876 877/* #include <fcntl.h> */ 878#ifdef _SYS_FCNTL_H_ 879int __sys_fcntl(int, int, ...); 880int __sys_flock(int, int); 881int __sys_open(const char *, int, ...); 882#endif 883 884/* #include <poll.h> */ 885#ifdef _SYS_POLL_H_ 886int __sys_poll(struct pollfd *, unsigned, int); 887#endif 888 889/* #include <signal.h> */ 890#ifdef _SIGNAL_H_ 891int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 892int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 893int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 894int __sys_sigreturn(ucontext_t *); 895#endif 896 897/* #include <unistd.h> */ 898#ifdef _UNISTD_H_ 899int __sys_close(int); 900int __sys_dup(int); 901int __sys_dup2(int, int); 902int __sys_execve(const char *, char * const *, char * const *); 903void __sys_exit(int); 904int __sys_fchown(int, uid_t, gid_t); 905pid_t __sys_fork(void); 906long __sys_fpathconf(int, int); 907int __sys_fsync(int); 908int __sys_pipe(int *); 909ssize_t __sys_read(int, void *, size_t); 910ssize_t __sys_write(int, const void *, size_t); 911#endif 912 913__END_DECLS 914 915#endif /* !_PTHREAD_PRIVATE_H */ 916