lib/libthread_xu/thread/thr_private.h

   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, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: head/lib/libthr/thread/thr_private.h 217706 2010-08-23 $
  29  */
  30
  31 /*
  32  * Private thread definitions for the uthread kernel.
  33  */
  34
  35 #ifndef _THR_PRIVATE_H
  36 #define _THR_PRIVATE_H
  37
  38 /*
  39  * Include files.
  40  */
  41 #include <sys/types.h>
  42 #include <sys/time.h>
  43 #include <sys/cdefs.h>
  44 #include <sys/queue.h>
  45 #include <sys/rtprio.h>
  46 #include <machine/atomic.h>
  47 #include <machine/cpumask.h>
  48 #include <errno.h>
  49 #include <limits.h>
  50 #include <signal.h>
  51 #include <sys/sched.h>
  52 #include <stdarg.h>
  53 #include <unistd.h>
  54 #include <pthread.h>
  55 #include <pthread_np.h>
  56
  57 #if defined(_PTHREADS_DEBUGGING) || defined(_PTHREADS_DEBUGGING2)
  58 void    _thr_log(const char *buf, size_t bytes);
  59 #endif
  60
  61 #include "pthread_md.h"
  62 #include "thr_umtx.h"
  63 #include "thread_db.h"
  64
  65 /* Signal to do cancellation */
  66 #define SIGCANCEL               32
  67
  68 /*
  69  * Kernel fatal error handler macro.
  70  */
  71 #define PANIC(args...)          _thread_exitf(__FILE__, __LINE__, ##args)
  72
  73 /* Output debug messages like this: */
  74 #define stdout_debug(args...)   _thread_printf(STDOUT_FILENO, ##args)
  75 #define stderr_debug(args...)   _thread_printf(STDERR_FILENO, ##args)
  76
  77 #ifdef _PTHREADS_INVARIANTS
  78 #define THR_ASSERT(cond, msg) do {      \
  79         if (__predict_false(!(cond)))   \
  80                 PANIC(msg);             \
  81 } while (0)
  82 #else
  83 #define THR_ASSERT(cond, msg)
  84 #endif
  85
  86 #ifdef PIC
  87 #define STATIC_LIB_REQUIRE(name)
  88 #else
  89 #define STATIC_LIB_REQUIRE(name)        __asm(".globl " #name)
  90 #endif
  91
  92 TAILQ_HEAD(thread_head, pthread)        thread_head;
  93 TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
  94
  95 #define TIMESPEC_ADD(dst, src, val)                             \
  96         do {                                                    \
  97                 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec;  \
  98                 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
  99                 if ((dst)->tv_nsec >= 1000000000) {             \
 100                         (dst)->tv_sec++;                        \
 101                         (dst)->tv_nsec -= 1000000000;           \
 102                 }                                               \
 103         } while (0)
 104
 105 #define TIMESPEC_SUB(dst, src, val)                             \
 106         do {                                                    \
 107                 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec;  \
 108                 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
 109                 if ((dst)->tv_nsec < 0) {                       \
 110                         (dst)->tv_sec--;                        \
 111                         (dst)->tv_nsec += 1000000000;           \
 112                 }                                               \
 113         } while (0)
 114
 115 struct pthread_mutex {
 116         /*
 117          * Lock for accesses to this structure.
 118          */
 119         volatile umtx_t                 m_lock;
 120 #ifdef _PTHREADS_DEBUGGING2
 121         int                             m_lastop[32];
 122 #endif
 123         enum pthread_mutextype          m_type;
 124         int                             m_protocol;
 125         TAILQ_HEAD(mutex_head, pthread) m_queue;
 126         struct pthread                  *m_owner;
 127         long                            m_flags;
 128         int                             m_count;
 129         int                             m_refcount;
 130
 131         /*
 132          * Used for priority inheritence and protection.
 133          *
 134          *   m_prio       - For priority inheritence, the highest active
 135          *                  priority (threads locking the mutex inherit
 136          *                  this priority).  For priority protection, the
 137          *                  ceiling priority of this mutex.
 138          *   m_saved_prio - mutex owners inherited priority before
 139          *                  taking the mutex, restored when the owner
 140          *                  unlocks the mutex.
 141          */
 142         int                             m_prio;
 143         int                             m_saved_prio;
 144
 145         /*
 146          * Link for list of all mutexes a thread currently owns.
 147          */
 148         TAILQ_ENTRY(pthread_mutex)      m_qe;
 149 };
 150
 151 #define TAILQ_INITIALIZER       { NULL, NULL }
 152
 153 #define PTHREAD_MUTEX_STATIC_INITIALIZER                \
 154         {       .m_lock = 0,                            \
 155                 .m_type = PTHREAD_MUTEX_DEFAULT,        \
 156                 .m_protocol = PTHREAD_PRIO_NONE,        \
 157                 .m_queue = TAILQ_INITIALIZER,           \
 158                 .m_flags = MUTEX_FLAGS_PRIVATE          \
 159         }
 160 /*
 161  * Flags for mutexes.
 162  */
 163 #define MUTEX_FLAGS_PRIVATE     0x01
 164 #define MUTEX_FLAGS_INITED      0x02
 165
 166 struct pthread_mutex_attr {
 167         enum pthread_mutextype  m_type;
 168         int                     m_protocol;
 169         int                     m_ceiling;
 170         int                     m_flags;
 171 };
 172
 173 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
 174         { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
 175
 176 struct cond_cancel_info;
 177
 178 struct pthread_cond {
 179         /*
 180          * Lock for accesses to this structure.
 181          */
 182         volatile umtx_t c_lock;
 183         volatile int    c_unused01;
 184         int             c_pshared;
 185         int             c_clockid;
 186         TAILQ_HEAD(, cond_cancel_info)  c_waitlist;
 187 };
 188
 189 struct pthread_cond_attr {
 190         int             c_pshared;
 191         int             c_clockid;
 192 };
 193
 194 /*
 195  * Flags for condition variables.
 196  */
 197 #define COND_FLAGS_PRIVATE      0x01
 198 #define COND_FLAGS_INITED       0x02
 199
 200 struct pthread_barrier {
 201         volatile umtx_t b_lock;
 202         volatile umtx_t b_cycle;
 203         volatile int    b_count;
 204         volatile int    b_waiters;
 205 };
 206
 207 struct pthread_barrierattr {
 208         int             pshared;
 209 };
 210
 211 struct pthread_spinlock {
 212         volatile umtx_t s_lock;
 213 };
 214
 215 /*
 216  * Cleanup definitions.
 217  */
 218 struct pthread_cleanup {
 219         struct pthread_cleanup  *next;
 220         void                    (*routine)(void *);
 221         void                    *routine_arg;
 222         int                     onstack;
 223 };
 224
 225 #define THR_CLEANUP_PUSH(td, func, arg) {               \
 226         struct pthread_cleanup __cup;                   \
 227                                                         \
 228         __cup.routine = func;                           \
 229         __cup.routine_arg = arg;                        \
 230         __cup.onstack = 1;                              \
 231         __cup.next = (td)->cleanup;                     \
 232         (td)->cleanup = &__cup;
 233
 234 #define THR_CLEANUP_POP(td, exec)                       \
 235         (td)->cleanup = __cup.next;                     \
 236         if ((exec) != 0)                                \
 237                 __cup.routine(__cup.routine_arg);       \
 238 }
 239
 240 struct pthread_atfork {
 241         TAILQ_ENTRY(pthread_atfork) qe;
 242         void (*prepare)(void);
 243         void (*parent)(void);
 244         void (*child)(void);
 245 };
 246
 247 struct pthread_attr {
 248         int     sched_policy;
 249         int     sched_inherit;
 250         int     prio;
 251         int     suspend;
 252 #define THR_STACK_USER          0x100   /* 0xFF reserved for <pthread.h> */
 253 #define THR_CPUMASK             0x200   /* cpumask is valid */
 254         int     flags;
 255         void    *stackaddr_attr;
 256         size_t  stacksize_attr;
 257         size_t  guardsize_attr;
 258         cpumask_t cpumask;
 259 };
 260
 261 /*
 262  * Thread creation state attributes.
 263  */
 264 #define THR_CREATE_RUNNING              0
 265 #define THR_CREATE_SUSPENDED            1
 266
 267 /*
 268  * Miscellaneous definitions.
 269  */
 270 #define THR_STACK_DEFAULT               (sizeof(void *) / 4 * 1024 * 1024)
 271
 272 /*
 273  * Maximum size of initial thread's stack.  This perhaps deserves to be larger
 274  * than the stacks of other threads, since many applications are likely to run
 275  * almost entirely on this stack.
 276  */
 277 #define THR_STACK_INITIAL               (THR_STACK_DEFAULT * 2)
 278
 279 /*
 280  * Define the different priority ranges.  All applications have thread
 281  * priorities constrained within 0-31.  The threads library raises the
 282  * priority when delivering signals in order to ensure that signal
 283  * delivery happens (from the POSIX spec) "as soon as possible".
 284  * In the future, the threads library will also be able to map specific
 285  * threads into real-time (cooperating) processes or kernel threads.
 286  * The RT and SIGNAL priorities will be used internally and added to
 287  * thread base priorities so that the scheduling queue can handle both
 288  * normal and RT priority threads with and without signal handling.
 289  *
 290  * The approach taken is that, within each class, signal delivery
 291  * always has priority over thread execution.
 292  */
 293 #define THR_DEFAULT_PRIORITY            0
 294 #define THR_MUTEX_CEIL_PRIORITY         31      /* dummy */
 295
 296 /*
 297  * Time slice period in microseconds.
 298  */
 299 #define TIMESLICE_USEC                          20000
 300
 301 struct pthread_rwlockattr {
 302         int             pshared;
 303 };
 304
 305 struct pthread_rwlock {
 306         pthread_mutex_t lock;   /* monitor lock */
 307         pthread_cond_t  read_signal;
 308         pthread_cond_t  write_signal;
 309         int             state;  /* 0 = idle  >0 = # of readers  -1 = writer */
 310         int             blocked_writers;
 311 };
 312
 313 /*
 314  * Thread states.
 315  */
 316 enum pthread_state {
 317         PS_RUNNING,
 318         PS_DEAD
 319 };
 320
 321 struct pthread_specific_elem {
 322         const void      *data;
 323         int             seqno;
 324 };
 325
 326 struct pthread_key {
 327         volatile int    allocated;
 328         volatile int    count;
 329         int             seqno;
 330         void            (*destructor)(void *);
 331 };
 332
 333 /*
 334  * Thread structure.
 335  */
 336 struct pthread {
 337         /*
 338          * Magic value to help recognize a valid thread structure
 339          * from an invalid one:
 340          */
 341 #define THR_MAGIC               ((u_int32_t) 0xd09ba115)
 342         u_int32_t               magic;
 343         char                    *name;
 344         u_int64_t               uniqueid; /* for gdb */
 345
 346         /*
 347          * Lock for accesses to this thread structure.
 348          */
 349         umtx_t                  lock;
 350
 351         /* Thread is terminated in kernel, written by kernel. */
 352         long                    terminated;
 353
 354         /* Kernel thread id. */
 355         lwpid_t                 tid;
 356
 357         /* Internal condition variable cycle number. */
 358         umtx_t                  cycle;
 359
 360         /* How many low level locks the thread held. */
 361         int                     locklevel;
 362
 363         /*
 364          * Set to non-zero when this thread has entered a critical
 365          * region.  We allow for recursive entries into critical regions.
 366          */
 367         int                     critical_count;
 368
 369         /* Signal blocked counter. */
 370         int                     sigblock;
 371
 372         /* Queue entry for list of all threads. */
 373         TAILQ_ENTRY(pthread)    tle;    /* link for all threads in process */
 374
 375         /* Queue entry for GC lists. */
 376         TAILQ_ENTRY(pthread)    gcle;
 377
 378         /* Hash queue entry. */
 379         LIST_ENTRY(pthread)     hle;
 380
 381         /* Threads reference count. */
 382         int                     refcount;
 383
 384         /*
 385          * Thread start routine, argument, stack pointer and thread
 386          * attributes.
 387          */
 388         void                    *(*start_routine)(void *);
 389         void                    *arg;
 390         struct pthread_attr     attr;
 391
 392         /*
 393          * Cancelability flags
 394          */
 395 #define THR_CANCEL_DISABLE              0x0001
 396 #define THR_CANCEL_EXITING              0x0002
 397 #define THR_CANCEL_AT_POINT             0x0004
 398 #define THR_CANCEL_NEEDED               0x0008
 399 #define SHOULD_CANCEL(val)                                      \
 400         (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING |    \
 401                  THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED)
 402
 403 #define SHOULD_ASYNC_CANCEL(val)                                \
 404         (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING |    \
 405                  THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) ==   \
 406                  (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT))
 407         int                     cancelflags;
 408
 409         /* Thread temporary signal mask. */
 410         sigset_t                sigmask;
 411
 412         /* Thread state: */
 413         umtx_t                  state;
 414
 415         /*
 416          * Error variable used instead of errno, used for internal.
 417          */
 418         int                     error;
 419
 420         /*
 421          * The joiner is the thread that is joining to this thread.  The
 422          * join status keeps track of a join operation to another thread.
 423          */
 424         struct pthread          *joiner;
 425
 426         /*
 427          * The current thread can belong to a priority mutex queue.
 428          * This is the synchronization queue link.
 429          */
 430         TAILQ_ENTRY(pthread)    sqe;
 431
 432         /* Miscellaneous flags; only set with scheduling lock held. */
 433         int                     flags;
 434 #define THR_FLAGS_PRIVATE       0x0001
 435 #define THR_FLAGS_NEED_SUSPEND  0x0002  /* thread should be suspended */
 436 #define THR_FLAGS_SUSPENDED     0x0004  /* thread is suspended */
 437
 438         /* Thread list flags; only set with thread list lock held. */
 439         int                     tlflags;
 440 #define TLFLAGS_GC_SAFE         0x0001  /* thread safe for cleaning */
 441 #define TLFLAGS_IN_TDLIST       0x0002  /* thread in all thread list */
 442 #define TLFLAGS_IN_GCLIST       0x0004  /* thread in gc list */
 443 #define TLFLAGS_DETACHED        0x0008  /* thread is detached */
 444
 445         /*
 446          * Base priority is the user setable and retrievable priority
 447          * of the thread.  It is only affected by explicit calls to
 448          * set thread priority and upon thread creation via a thread
 449          * attribute or default priority.
 450          */
 451         char                    base_priority;
 452
 453         /*
 454          * Inherited priority is the priority a thread inherits by
 455          * taking a priority inheritence or protection mutex.  It
 456          * is not affected by base priority changes.  Inherited
 457          * priority defaults to and remains 0 until a mutex is taken
 458          * that is being waited on by any other thread whose priority
 459          * is non-zero.
 460          */
 461         char                    inherited_priority;
 462
 463         /*
 464          * Active priority is always the maximum of the threads base
 465          * priority and inherited priority.  When there is a change
 466          * in either the base or inherited priority, the active
 467          * priority must be recalculated.
 468          */
 469         char                    active_priority;
 470
 471         /* Number of priority ceiling or protection mutexes owned. */
 472         int                     priority_mutex_count;
 473
 474         /* Queue of currently owned simple type mutexes. */
 475         TAILQ_HEAD(, pthread_mutex)     mutexq;
 476
 477         void                            *ret;
 478         struct pthread_specific_elem    *specific;
 479         int                             specific_data_count;
 480
 481         /* Number rwlocks rdlocks held. */
 482         int                     rdlock_count;
 483
 484         /*
 485          * Current locks bitmap for rtld. */
 486         int                     rtld_bits;
 487
 488         /* Thread control block */
 489         struct tls_tcb          *tcb;
 490
 491         /* Cleanup handlers Link List */
 492         struct pthread_cleanup  *cleanup;
 493
 494         /* Enable event reporting */
 495         int                     report_events;
 496
 497         /* Event mask */
 498         td_thr_events_t         event_mask;
 499
 500         /* Event */
 501         td_event_msg_t          event_buf;
 502 };
 503
 504 #define THR_IN_CRITICAL(thrd)                           \
 505         (((thrd)->locklevel > 0) ||                     \
 506         ((thrd)->critical_count > 0))
 507
 508 #define THR_UMTX_TRYLOCK(thrd, lck)                     \
 509         _thr_umtx_trylock((lck), (thrd)->tid)
 510
 511 #define THR_UMTX_LOCK(thrd, lck)                        \
 512         _thr_umtx_lock((lck), (thrd)->tid)
 513
 514 #define THR_UMTX_TIMEDLOCK(thrd, lck, timo)             \
 515         _thr_umtx_timedlock((lck), (thrd)->tid, (timo))
 516
 517 #define THR_UMTX_UNLOCK(thrd, lck)                      \
 518         _thr_umtx_unlock((lck), (thrd)->tid)
 519
 520 #define THR_LOCK_ACQUIRE(thrd, lck)                     \
 521 do {                                                    \
 522         (thrd)->locklevel++;                            \
 523         _thr_umtx_lock((lck), (thrd)->tid);             \
 524 } while (0)
 525
 526 #ifdef  _PTHREADS_INVARIANTS
 527 #define THR_ASSERT_LOCKLEVEL(thrd)                      \
 528 do {                                                    \
 529         if (__predict_false((thrd)->locklevel <= 0))    \
 530                 _thr_assert_lock_level();               \
 531 } while (0)
 532 #else
 533 #define THR_ASSERT_LOCKLEVEL(thrd)
 534 #endif
 535
 536 #define THR_LOCK_RELEASE(thrd, lck)                     \
 537 do {                                                    \
 538         THR_ASSERT_LOCKLEVEL(thrd);                     \
 539         _thr_umtx_unlock((lck), (thrd)->tid);           \
 540         (thrd)->locklevel--;                            \
 541         _thr_ast(thrd);                                 \
 542 } while (0)
 543
 544 #define THR_LOCK(curthrd)               THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
 545 #define THR_UNLOCK(curthrd)             THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
 546 #define THR_THREAD_LOCK(curthrd, thr)   THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
 547 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
 548
 549 #define THREAD_LIST_LOCK(curthrd)                               \
 550 do {                                                            \
 551         THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock);           \
 552 } while (0)
 553
 554 #define THREAD_LIST_UNLOCK(curthrd)                             \
 555 do {                                                            \
 556         THR_LOCK_RELEASE((curthrd), &_thr_list_lock);           \
 557 } while (0)
 558
 559 /*
 560  * Macros to insert/remove threads to the all thread list and
 561  * the gc list.
 562  */
 563 #define THR_LIST_ADD(thrd) do {                                 \
 564         if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) {       \
 565                 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle);    \
 566                 _thr_hash_add(thrd);                            \
 567                 (thrd)->tlflags |= TLFLAGS_IN_TDLIST;           \
 568         }                                                       \
 569 } while (0)
 570 #define THR_LIST_REMOVE(thrd) do {                              \
 571         if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) {       \
 572                 TAILQ_REMOVE(&_thread_list, thrd, tle);         \
 573                 _thr_hash_remove(thrd);                         \
 574                 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST;          \
 575         }                                                       \
 576 } while (0)
 577 #define THR_GCLIST_ADD(thrd) do {                               \
 578         if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) {       \
 579                 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
 580                 (thrd)->tlflags |= TLFLAGS_IN_GCLIST;           \
 581                 _thr_gc_count++;                                        \
 582         }                                                       \
 583 } while (0)
 584 #define THR_GCLIST_REMOVE(thrd) do {                            \
 585         if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) {       \
 586                 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle);     \
 587                 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST;          \
 588                 _thr_gc_count--;                                        \
 589         }                                                       \
 590 } while (0)
 591
 592 #define GC_NEEDED()     (_thr_gc_count >= 5)
 593
 594 #define THR_IN_SYNCQ(thrd)      (((thrd)->sflags & THR_FLAGS_IN_SYNCQ) != 0)
 595
 596 #define SHOULD_REPORT_EVENT(curthr, e)                  \
 597         (curthr->report_events &&                       \
 598          (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
 599
 600 #if !defined(_LIBC_PRIVATE_H_) && !defined(_STDIO_H_)
 601 extern int __isthreaded;
 602 #endif
 603
 604 /*
 605  * Global variables for the pthread library.
 606  */
 607 extern char             *_usrstack;
 608 extern struct pthread   *_thr_initial;
 609
 610 /* For debugger */
 611 extern int              _libthread_xu_debug;
 612 extern int              _thread_event_mask;
 613 extern struct pthread   *_thread_last_event;
 614
 615 /* List of all threads */
 616 extern struct thread_head       _thread_list;
 617
 618 /* List of threads needing GC */
 619 extern struct thread_head       _thread_gc_list;
 620
 621 extern int      _thread_active_threads;
 622
 623 extern struct   atfork_head     _thr_atfork_list;
 624 extern struct   atfork_head     _thr_atfork_kern_list;
 625 extern umtx_t   _thr_atfork_lock;
 626
 627 /* Default thread attributes */
 628 extern struct pthread_attr _pthread_attr_default;
 629
 630 /* Default mutex attributes */
 631 extern struct pthread_mutex_attr _pthread_mutexattr_default;
 632
 633 /* Default condition variable attributes */
 634 extern struct pthread_cond_attr _pthread_condattr_default;
 635
 636 extern pid_t    _thr_pid;
 637 extern size_t   _thr_guard_default;
 638 extern size_t   _thr_stack_default;
 639 extern size_t   _thr_stack_initial;
 640 extern int      _thr_page_size;
 641 extern int      _thr_gc_count;
 642
 643 extern umtx_t   _mutex_static_lock;
 644 extern umtx_t   _cond_static_lock;
 645 extern umtx_t   _rwlock_static_lock;
 646 extern umtx_t   _keytable_lock;
 647 extern umtx_t   _thr_list_lock;
 648 extern umtx_t   _thr_event_lock;
 649
 650 /*
 651  * Function prototype definitions.
 652  */
 653 __BEGIN_DECLS
 654 int     _thr_setthreaded(int);
 655 int     _mutex_cv_lock(pthread_mutex_t *, int count);
 656 int     _mutex_cv_unlock(pthread_mutex_t *, int *count);
 657 void    _mutex_notify_priochange(struct pthread *, struct pthread *, int);
 658 void    _mutex_fork(struct pthread *curthread);
 659 void    _mutex_unlock_private(struct pthread *);
 660
 661 #if 0
 662 int     _mutex_reinit(pthread_mutex_t *);
 663 void    _cond_reinit(pthread_cond_t pcond);
 664 void    _rwlock_reinit(pthread_rwlock_t prwlock);
 665 #endif
 666
 667 void    _libpthread_init(struct pthread *);
 668 struct pthread *_thr_alloc(struct pthread *);
 669 void    _thread_exit(const char *, int, const char *) __dead2;
 670 void    _thread_exitf(const char *, int, const char *, ...) __dead2
 671             __printflike(3, 4);
 672 void    _thr_exit_cleanup(void);
 673 void    _thr_atfork_kern(void (*prepare)(void), void (*parent)(void),
 674                         void (*child)(void));
 675 int     _thr_ref_add(struct pthread *, struct pthread *, int);
 676 void    _thr_ref_delete(struct pthread *, struct pthread *);
 677 void    _thr_ref_delete_unlocked(struct pthread *, struct pthread *);
 678 int     _thr_find_thread(struct pthread *, struct pthread *, int);
 679 void    _thr_malloc_init(void);
 680 void    _thr_rtld_init(void);
 681 void    _thr_rtld_fini(void);
 682 int     _thr_stack_alloc(struct pthread_attr *);
 683 void    _thr_stack_free(struct pthread_attr *);
 684 void    _thr_stack_cleanup(void);
 685 void    _thr_sem_init(void);
 686 void    _thr_free(struct pthread *, struct pthread *);
 687 void    _thr_gc(struct pthread *);
 688 void    _thread_cleanupspecific(void);
 689 void    _thread_dump_info(void);
 690 void    _thread_printf(int, const char *, ...) __printflike(2, 3);
 691 void    _thread_vprintf(int, const char *, va_list);
 692 void    _thr_spinlock_init(void);
 693 int     _thr_cancel_enter(struct pthread *);
 694 void    _thr_cancel_leave(struct pthread *, int);
 695 void    _thr_signal_block(struct pthread *);
 696 void    _thr_signal_unblock(struct pthread *);
 697 void    _thr_signal_init(void);
 698 void    _thr_signal_deinit(void);
 699 int     _thr_send_sig(struct pthread *, int sig);
 700 void    _thr_list_init(void);
 701 void    _thr_hash_add(struct pthread *);
 702 void    _thr_hash_remove(struct pthread *);
 703 struct pthread *_thr_hash_find(struct pthread *);
 704 void    _thr_link(struct pthread *curthread, struct pthread *thread);
 705 void    _thr_unlink(struct pthread *curthread, struct pthread *thread);
 706 void    _thr_suspend_check(struct pthread *curthread);
 707 void    _thr_assert_lock_level(void) __dead2;
 708 void    _thr_ast(struct pthread *);
 709 int     _thr_get_tid(void);
 710 void    _thr_report_creation(struct pthread *curthread,
 711                            struct pthread *newthread);
 712 void    _thr_report_death(struct pthread *curthread);
 713 void    _thread_bp_create(void);
 714 void    _thread_bp_death(void);
 715 int     _thr_getscheduler(lwpid_t, int *, struct sched_param *);
 716 int     _thr_setscheduler(lwpid_t, int, const struct sched_param *);
 717 int     _thr_set_sched_other_prio(struct pthread *, int);
 718 int     _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
 719             struct sched_param *param);
 720 int     _schedparam_to_rtp(int policy, const struct sched_param *param,
 721             struct rtprio *rtp);
 722 int     _umtx_sleep_err(volatile const int *, int, int);
 723 int     _umtx_wakeup_err(volatile const int *, int);
 724
 725 /* #include <fcntl.h> */
 726 #ifdef  _SYS_FCNTL_H_
 727 int     __sys_fcntl(int, int, ...);
 728 int     __sys_open(const char *, int, ...);
 729 int     __sys_openat(int, const char *, int, ...);
 730 #endif
 731
 732 /* #include <sys/ioctl.h> */
 733 #ifdef _SYS_IOCTL_H_
 734 int     __sys_ioctl(int, unsigned long, ...);
 735 #endif
 736
 737 /* #inclde <sched.h> */
 738 #ifdef  _SCHED_H_
 739 int     __sys_sched_yield(void);
 740 #endif
 741
 742 /* #include <signal.h> */
 743 #ifdef _SIGNAL_H_
 744 int     __sys_kill(pid_t, int);
 745 int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);
 746 int     __sys_sigpending(sigset_t *);
 747 int     __sys_sigprocmask(int, const sigset_t *, sigset_t *);
 748 int     __sys_sigsuspend(const sigset_t *);
 749 int     __sys_sigreturn(ucontext_t *);
 750 int     __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
 751 #endif
 752
 753 /* #include <time.h> */
 754 #ifdef  _TIME_H_
 755 int     __sys_nanosleep(const struct timespec *, struct timespec *);
 756 #endif
 757
 758 /* #include <unistd.h> */
 759 #ifdef  _UNISTD_H_
 760 int     __sys_close(int);
 761 int     __sys_execve(const char *, char * const *, char * const *);
 762 pid_t   __sys_getpid(void);
 763 ssize_t __sys_read(int, void *, size_t);
 764 ssize_t __sys_write(int, const void *, size_t);
 765 void    __sys_exit(int);
 766 int     __sys_sigwait(const sigset_t *, int *);
 767 int     __sys_sigtimedwait(const sigset_t *, siginfo_t *,
 768                 const struct timespec *);
 769 int     __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
 770 #endif
 771
 772 static inline int
 773 _thr_isthreaded(void)
 774 {
 775         return (__isthreaded != 0);
 776 }
 777
 778 static inline int
 779 _thr_is_inited(void)
 780 {
 781         return (_thr_initial != NULL);
 782 }
 783
 784 static inline void
 785 _thr_check_init(void)
 786 {
 787         if (_thr_initial == NULL)
 788                 _libpthread_init(NULL);
 789 }
 790
 791 struct dl_phdr_info;
 792 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
 793
 794 __END_DECLS
 795
 796 #endif  /* !_THR_PRIVATE_H */