lib/libthread_xu/thread/thr_private.h

   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 217706 2010-08-23 $
  35  */
  36
  37 #ifndef _THR_PRIVATE_H
  38 #define _THR_PRIVATE_H
  39
  40 /*
  41  * Include files.
  42  */
  43 #include <sys/types.h>
  44 #include <sys/time.h>
  45 #include <sys/cdefs.h>
  46 #include <sys/queue.h>
  47 #include <sys/rtprio.h>
  48 #include <machine/atomic.h>
  49 #include <errno.h>
  50 #include <limits.h>
  51 #include <signal.h>
  52 #include <stdio.h>
  53 #include <sys/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(STDERR_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_broadcast;
 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     prio;
 240         int     suspend;
 241 #define THR_STACK_USER          0x100   /* 0xFF reserved for <pthread.h> */
 242         int     flags;
 243         void    *stackaddr_attr;
 244         size_t  stacksize_attr;
 245         size_t  guardsize_attr;
 246 };
 247
 248 /*
 249  * Thread creation state attributes.
 250  */
 251 #define THR_CREATE_RUNNING              0
 252 #define THR_CREATE_SUSPENDED            1
 253
 254 /*
 255  * Miscellaneous definitions.
 256  */
 257 #define THR_STACK_DEFAULT               (sizeof(void *) / 4 * 1024 * 1024)
 258
 259 /*
 260  * Maximum size of initial thread's stack.  This perhaps deserves to be larger
 261  * than the stacks of other threads, since many applications are likely to run
 262  * almost entirely on this stack.
 263  */
 264 #define THR_STACK_INITIAL               (THR_STACK_DEFAULT * 2)
 265
 266 /*
 267  * Define the different priority ranges.  All applications have thread
 268  * priorities constrained within 0-31.  The threads library raises the
 269  * priority when delivering signals in order to ensure that signal
 270  * delivery happens (from the POSIX spec) "as soon as possible".
 271  * In the future, the threads library will also be able to map specific
 272  * threads into real-time (cooperating) processes or kernel threads.
 273  * The RT and SIGNAL priorities will be used internally and added to
 274  * thread base priorities so that the scheduling queue can handle both
 275  * normal and RT priority threads with and without signal handling.
 276  *
 277  * The approach taken is that, within each class, signal delivery
 278  * always has priority over thread execution.
 279  */
 280 #define THR_DEFAULT_PRIORITY            0
 281 #define THR_MUTEX_CEIL_PRIORITY         31      /* dummy */
 282
 283 /*
 284  * Time slice period in microseconds.
 285  */
 286 #define TIMESLICE_USEC                          20000
 287
 288 struct pthread_rwlockattr {
 289         int             pshared;
 290 };
 291
 292 struct pthread_rwlock {
 293         pthread_mutex_t lock;   /* monitor lock */
 294         pthread_cond_t  read_signal;
 295         pthread_cond_t  write_signal;
 296         int             state;  /* 0 = idle  >0 = # of readers  -1 = writer */
 297         int             blocked_writers;
 298 };
 299
 300 /*
 301  * Thread states.
 302  */
 303 enum pthread_state {
 304         PS_RUNNING,
 305         PS_DEAD
 306 };
 307
 308 struct pthread_specific_elem {
 309         const void      *data;
 310         int             seqno;
 311 };
 312
 313 struct pthread_key {
 314         volatile int    allocated;
 315         volatile int    count;
 316         int             seqno;
 317         void            (*destructor)(void *);
 318 };
 319
 320 /*
 321  * Thread structure.
 322  */
 323 struct pthread {
 324         /*
 325          * Magic value to help recognize a valid thread structure
 326          * from an invalid one:
 327          */
 328 #define THR_MAGIC               ((u_int32_t) 0xd09ba115)
 329         u_int32_t               magic;
 330         char                    *name;
 331         u_int64_t               uniqueid; /* for gdb */
 332
 333         /*
 334          * Lock for accesses to this thread structure.
 335          */
 336         umtx_t                  lock;
 337
 338         /* Thread is terminated in kernel, written by kernel. */
 339         long                    terminated;
 340
 341         /* Kernel thread id. */
 342         lwpid_t                 tid;
 343
 344         /* Internal condition variable cycle number. */
 345         umtx_t                  cycle;
 346
 347         /* How many low level locks the thread held. */
 348         int                     locklevel;
 349
 350         /*
 351          * Set to non-zero when this thread has entered a critical
 352          * region.  We allow for recursive entries into critical regions.
 353          */
 354         int                     critical_count;
 355
 356         /* Signal blocked counter. */
 357         int                     sigblock;
 358
 359         /* Queue entry for list of all threads. */
 360         TAILQ_ENTRY(pthread)    tle;    /* link for all threads in process */
 361
 362         /* Queue entry for GC lists. */
 363         TAILQ_ENTRY(pthread)    gcle;
 364
 365         /* Hash queue entry. */
 366         LIST_ENTRY(pthread)     hle;
 367
 368         /* Threads reference count. */
 369         int                     refcount;
 370
 371         /*
 372          * Thread start routine, argument, stack pointer and thread
 373          * attributes.
 374          */
 375         void                    *(*start_routine)(void *);
 376         void                    *arg;
 377         struct pthread_attr     attr;
 378
 379         /*
 380          * Cancelability flags
 381          */
 382 #define THR_CANCEL_DISABLE              0x0001
 383 #define THR_CANCEL_EXITING              0x0002
 384 #define THR_CANCEL_AT_POINT             0x0004
 385 #define THR_CANCEL_NEEDED               0x0008
 386 #define SHOULD_CANCEL(val)                                      \
 387         (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING |    \
 388                  THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED)
 389
 390 #define SHOULD_ASYNC_CANCEL(val)                                \
 391         (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING |    \
 392                  THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) ==   \
 393                  (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT))
 394         int                     cancelflags;
 395
 396         /* Thread temporary signal mask. */
 397         sigset_t                sigmask;
 398
 399         /* Thread state: */
 400         umtx_t                  state;
 401
 402         /*
 403          * Error variable used instead of errno, used for internal.
 404          */
 405         int                     error;
 406
 407         /*
 408          * The joiner is the thread that is joining to this thread.  The
 409          * join status keeps track of a join operation to another thread.
 410          */
 411         struct pthread          *joiner;
 412
 413         /*
 414          * The current thread can belong to a priority mutex queue.
 415          * This is the synchronization queue link.
 416          */
 417         TAILQ_ENTRY(pthread)    sqe;
 418
 419         /* Miscellaneous flags; only set with scheduling lock held. */
 420         int                     flags;
 421 #define THR_FLAGS_PRIVATE       0x0001
 422 #define THR_FLAGS_NEED_SUSPEND  0x0002  /* thread should be suspended */
 423 #define THR_FLAGS_SUSPENDED     0x0004  /* thread is suspended */
 424
 425         /* Thread list flags; only set with thread list lock held. */
 426         int                     tlflags;
 427 #define TLFLAGS_GC_SAFE         0x0001  /* thread safe for cleaning */
 428 #define TLFLAGS_IN_TDLIST       0x0002  /* thread in all thread list */
 429 #define TLFLAGS_IN_GCLIST       0x0004  /* thread in gc list */
 430 #define TLFLAGS_DETACHED        0x0008  /* thread is detached */
 431
 432         /*
 433          * Base priority is the user setable and retrievable priority
 434          * of the thread.  It is only affected by explicit calls to
 435          * set thread priority and upon thread creation via a thread
 436          * attribute or default priority.
 437          */
 438         char                    base_priority;
 439
 440         /*
 441          * Inherited priority is the priority a thread inherits by
 442          * taking a priority inheritence or protection mutex.  It
 443          * is not affected by base priority changes.  Inherited
 444          * priority defaults to and remains 0 until a mutex is taken
 445          * that is being waited on by any other thread whose priority
 446          * is non-zero.
 447          */
 448         char                    inherited_priority;
 449
 450         /*
 451          * Active priority is always the maximum of the threads base
 452          * priority and inherited priority.  When there is a change
 453          * in either the base or inherited priority, the active
 454          * priority must be recalculated.
 455          */
 456         char                    active_priority;
 457
 458         /* Number of priority ceiling or protection mutexes owned. */
 459         int                     priority_mutex_count;
 460
 461         /* Queue of currently owned simple type mutexes. */
 462         TAILQ_HEAD(, pthread_mutex)     mutexq;
 463
 464         void                            *ret;
 465         struct pthread_specific_elem    *specific;
 466         int                             specific_data_count;
 467
 468         /* Number rwlocks rdlocks held. */
 469         int                     rdlock_count;
 470
 471         /*
 472          * Current locks bitmap for rtld. */
 473         int                     rtld_bits;
 474
 475         /* Thread control block */
 476         struct tls_tcb          *tcb;
 477
 478         /* Cleanup handlers Link List */
 479         struct pthread_cleanup *cleanup;
 480
 481         /* Enable event reporting */
 482         int                     report_events;
 483
 484         /* Event mask */
 485         td_thr_events_t         event_mask;
 486
 487         /* Event */
 488         td_event_msg_t          event_buf;
 489 };
 490
 491 #define THR_IN_CRITICAL(thrd)                           \
 492         (((thrd)->locklevel > 0) ||                     \
 493         ((thrd)->critical_count > 0))
 494
 495 #define THR_UMTX_TRYLOCK(thrd, lck)                     \
 496         _thr_umtx_trylock((lck), (thrd)->tid)
 497
 498 #define THR_UMTX_LOCK(thrd, lck)                        \
 499         _thr_umtx_lock((lck), (thrd)->tid)
 500
 501 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo)             \
 502         _thr_umtx_timedlock((lck), (thrd)->tid, (timo))
 503
 504 #define THR_UMTX_UNLOCK(thrd, lck)                      \
 505         _thr_umtx_unlock((lck), (thrd)->tid)
 506
 507 #define THR_LOCK_ACQUIRE(thrd, lck)                     \
 508 do {                                                    \
 509         (thrd)->locklevel++;                            \
 510         _thr_umtx_lock((lck), (thrd)->tid);             \
 511 } while (0)
 512
 513 #ifdef  _PTHREADS_INVARIANTS
 514 #define THR_ASSERT_LOCKLEVEL(thrd)                      \
 515 do {                                                    \
 516         if (__predict_false((thrd)->locklevel <= 0))    \
 517                 _thr_assert_lock_level();               \
 518 } while (0)
 519 #else
 520 #define THR_ASSERT_LOCKLEVEL(thrd)
 521 #endif
 522
 523 #define THR_LOCK_RELEASE(thrd, lck)                     \
 524 do {                                                    \
 525         THR_ASSERT_LOCKLEVEL(thrd);                     \
 526         _thr_umtx_unlock((lck), (thrd)->tid);           \
 527         (thrd)->locklevel--;                            \
 528         _thr_ast(thrd);                                 \
 529 } while (0)
 530
 531 #define THR_LOCK(curthrd)               THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
 532 #define THR_UNLOCK(curthrd)             THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
 533 #define THR_THREAD_LOCK(curthrd, thr)   THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
 534 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
 535
 536 #define THREAD_LIST_LOCK(curthrd)                               \
 537 do {                                                            \
 538         THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock);           \
 539 } while (0)
 540
 541 #define THREAD_LIST_UNLOCK(curthrd)                             \
 542 do {                                                            \
 543         THR_LOCK_RELEASE((curthrd), &_thr_list_lock);           \
 544 } while (0)
 545
 546 /*
 547  * Macros to insert/remove threads to the all thread list and
 548  * the gc list.
 549  */
 550 #define THR_LIST_ADD(thrd) do {                                 \
 551         if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) {       \
 552                 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle);    \
 553                 _thr_hash_add(thrd);                            \
 554                 (thrd)->tlflags |= TLFLAGS_IN_TDLIST;           \
 555         }                                                       \
 556 } while (0)
 557 #define THR_LIST_REMOVE(thrd) do {                              \
 558         if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) {       \
 559                 TAILQ_REMOVE(&_thread_list, thrd, tle);         \
 560                 _thr_hash_remove(thrd);                         \
 561                 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST;          \
 562         }                                                       \
 563 } while (0)
 564 #define THR_GCLIST_ADD(thrd) do {                               \
 565         if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) {       \
 566                 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
 567                 (thrd)->tlflags |= TLFLAGS_IN_GCLIST;           \
 568                 _thr_gc_count++;                                        \
 569         }                                                       \
 570 } while (0)
 571 #define THR_GCLIST_REMOVE(thrd) do {                            \
 572         if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) {       \
 573                 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle);     \
 574                 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST;          \
 575                 _thr_gc_count--;                                        \
 576         }                                                       \
 577 } while (0)
 578
 579 #define GC_NEEDED()     (_thr_gc_count >= 5)
 580
 581 #define THR_IN_SYNCQ(thrd)      (((thrd)->sflags & THR_FLAGS_IN_SYNCQ) != 0)
 582
 583 #define SHOULD_REPORT_EVENT(curthr, e)                  \
 584         (curthr->report_events &&                       \
 585          (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
 586
 587 extern int __isthreaded;
 588
 589 /*
 590  * Global variables for the pthread library.
 591  */
 592 extern char             *_usrstack;
 593 extern struct pthread   *_thr_initial;
 594 extern int              _thread_scope_system;
 595
 596 /* For debugger */
 597 extern int              _libthread_xu_debug;
 598 extern int              _thread_event_mask;
 599 extern struct pthread   *_thread_last_event;
 600
 601 /* List of all threads */
 602 extern struct thread_head       _thread_list;
 603
 604 /* List of threads needing GC */
 605 extern struct thread_head       _thread_gc_list;
 606
 607 extern int      _thread_active_threads;
 608
 609 extern struct   atfork_head     _thr_atfork_list;
 610 extern umtx_t   _thr_atfork_lock;
 611
 612 /* Default thread attributes */
 613 extern struct pthread_attr _pthread_attr_default;
 614
 615 /* Default mutex attributes */
 616 extern struct pthread_mutex_attr _pthread_mutexattr_default;
 617
 618 /* Default condition variable attributes */
 619 extern struct pthread_cond_attr _pthread_condattr_default;
 620
 621 extern pid_t    _thr_pid;
 622 extern size_t   _thr_guard_default;
 623 extern size_t   _thr_stack_default;
 624 extern size_t   _thr_stack_initial;
 625 extern int      _thr_page_size;
 626 extern int      _thr_gc_count;
 627
 628 extern umtx_t   _mutex_static_lock;
 629 extern umtx_t   _cond_static_lock;
 630 extern umtx_t   _rwlock_static_lock;
 631 extern umtx_t   _keytable_lock;
 632 extern umtx_t   _thr_list_lock;
 633 extern umtx_t   _thr_event_lock;
 634
 635 /*
 636  * Function prototype definitions.
 637  */
 638 __BEGIN_DECLS
 639 int     _thr_setthreaded(int);
 640 int     _mutex_cv_lock(pthread_mutex_t *, int count);
 641 int     _mutex_cv_unlock(pthread_mutex_t *, int *count);
 642 void    _mutex_notify_priochange(struct pthread *, struct pthread *, int);
 643 int     _mutex_reinit(pthread_mutex_t *);
 644 void    _mutex_fork(struct pthread *curthread);
 645 void    _mutex_unlock_private(struct pthread *);
 646 void    _libpthread_init(struct pthread *);
 647 struct pthread *_thr_alloc(struct pthread *);
 648 void    _thread_exit(const char *, int, const char *) __dead2;
 649 void    _thr_exit_cleanup(void);
 650 int     _thr_ref_add(struct pthread *, struct pthread *, int);
 651 void    _thr_ref_delete(struct pthread *, struct pthread *);
 652 void    _thr_ref_delete_unlocked(struct pthread *, struct pthread *);
 653 int     _thr_find_thread(struct pthread *, struct pthread *, int);
 654 void    _thr_rtld_init(void);
 655 void    _thr_rtld_fini(void);
 656 int     _thr_stack_alloc(struct pthread_attr *);
 657 void    _thr_stack_free(struct pthread_attr *);
 658 void    _thr_free(struct pthread *, struct pthread *);
 659 void    _thr_gc(struct pthread *);
 660 void    _thread_cleanupspecific(void);
 661 void    _thread_dump_info(void);
 662 void    _thread_printf(int, const char *, ...);
 663 void    _thr_spinlock_init(void);
 664 int     _thr_cancel_enter(struct pthread *);
 665 void    _thr_cancel_leave(struct pthread *, int);
 666 void    _thr_signal_block(struct pthread *);
 667 void    _thr_signal_unblock(struct pthread *);
 668 void    _thr_signal_init(void);
 669 void    _thr_signal_deinit(void);
 670 int     _thr_send_sig(struct pthread *, int sig);
 671 void    _thr_list_init(void);
 672 void    _thr_hash_add(struct pthread *);
 673 void    _thr_hash_remove(struct pthread *);
 674 struct pthread *_thr_hash_find(struct pthread *);
 675 void    _thr_link(struct pthread *curthread, struct pthread *thread);
 676 void    _thr_unlink(struct pthread *curthread, struct pthread *thread);
 677 void    _thr_suspend_check(struct pthread *curthread);
 678 void    _thr_assert_lock_level(void) __dead2;
 679 void    _thr_ast(struct pthread *);
 680 int     _thr_get_tid(void);
 681 void    _thr_report_creation(struct pthread *curthread,
 682                            struct pthread *newthread);
 683 void    _thr_report_death(struct pthread *curthread);
 684 void    _thread_bp_create(void);
 685 void    _thread_bp_death(void);
 686 int     _thr_getscheduler(lwpid_t, int *, struct sched_param *);
 687 int     _thr_setscheduler(lwpid_t, int, const struct sched_param *);
 688 int     _thr_set_sched_other_prio(struct pthread *, int);
 689 int     _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
 690             struct sched_param *param);
 691 int     _schedparam_to_rtp(int policy, const struct sched_param *param,
 692             struct rtprio *rtp);
 693 int     _umtx_sleep_err(volatile const int *, int, int);
 694 int     _umtx_wakeup_err(volatile const int *, int);
 695
 696 /* #include <sys/aio.h> */
 697 #ifdef _SYS_AIO_H_
 698 int     __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *);
 699 #endif
 700
 701 /* #include <fcntl.h> */
 702 #ifdef  _SYS_FCNTL_H_
 703 int     __sys_fcntl(int, int, ...);
 704 int     __sys_open(const char *, int, ...);
 705 int     __sys_openat(int, const char *, int, ...);
 706 #endif
 707
 708 /* #include <sys/ioctl.h> */
 709 #ifdef _SYS_IOCTL_H_
 710 int     __sys_ioctl(int, unsigned long, ...);
 711 #endif
 712
 713 /* #inclde <sched.h> */
 714 #ifdef  _SCHED_H_
 715 int     __sys_sched_yield(void);
 716 #endif
 717
 718 /* #include <signal.h> */
 719 #ifdef _SIGNAL_H_
 720 int     __sys_kill(pid_t, int);
 721 int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);
 722 int     __sys_sigpending(sigset_t *);
 723 int     __sys_sigprocmask(int, const sigset_t *, sigset_t *);
 724 int     __sys_sigsuspend(const sigset_t *);
 725 int     __sys_sigreturn(ucontext_t *);
 726 int     __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
 727 #endif
 728
 729 /* #include <sys/socket.h> */
 730 #ifdef _SYS_SOCKET_H_
 731 int     __sys_accept(int, struct sockaddr *, socklen_t *);
 732 int     __sys_connect(int, const struct sockaddr *, socklen_t);
 733 ssize_t __sys_recv(int, void *, size_t, int);
 734 ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
 735 ssize_t __sys_recvmsg(int, struct msghdr *, int);
 736 int     __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *,
 737             off_t *, int);
 738 ssize_t __sys_sendmsg(int, const struct msghdr *, int);
 739 ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t);
 740 #endif
 741
 742 /* #include <sys/uio.h> */
 743 #ifdef  _SYS_UIO_H_
 744 ssize_t __sys_readv(int, const struct iovec *, int);
 745 ssize_t __sys_writev(int, const struct iovec *, int);
 746 #endif
 747
 748 /* #include <time.h> */
 749 #ifdef  _TIME_H_
 750 int     __sys_nanosleep(const struct timespec *, struct timespec *);
 751 #endif
 752
 753 /* #include <unistd.h> */
 754 #ifdef  _UNISTD_H_
 755 int     __sys_close(int);
 756 int     __sys_execve(const char *, char * const *, char * const *);
 757 int     __sys_fork(void);
 758 int     __sys_fsync(int);
 759 pid_t   __sys_getpid(void);
 760 int     __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
 761 ssize_t __sys_read(int, void *, size_t);
 762 ssize_t __sys_write(int, const void *, size_t);
 763 void    __sys_exit(int);
 764 int     __sys_sigwait(const sigset_t *, int *);
 765 int     __sys_sigtimedwait(const sigset_t *, siginfo_t *,
 766                 const struct timespec *);
 767 int     __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
 768 #endif
 769
 770 /* #include <poll.h> */
 771 #ifdef _SYS_POLL_H_
 772 int     __sys_poll(struct pollfd *, unsigned, int);
 773 #endif
 774
 775 /* #include <sys/mman.h> */
 776 #ifdef _SYS_MMAN_H_
 777 int     __sys_msync(void *, size_t, int);
 778 #endif
 779
 780 static inline int
 781 _thr_isthreaded(void)
 782 {
 783         return (__isthreaded != 0);
 784 }
 785
 786 static inline int
 787 _thr_is_inited(void)
 788 {
 789         return (_thr_initial != NULL);
 790 }
 791
 792 static inline void
 793 _thr_check_init(void)
 794 {
 795         if (_thr_initial == NULL)
 796                 _libpthread_init(0);
 797 }
 798
 799 struct dl_phdr_info;
 800 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
 801
 802 __END_DECLS
 803
 804 #endif  /* !_THR_PRIVATE_H */