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>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #ifndef _THR_PRIVATE_H
33 #define _THR_PRIVATE_H
38 #include <sys/types.h>
40 #include <sys/cdefs.h>
41 #include <sys/queue.h>
42 #include <sys/param.h>
43 #include <sys/cpuset.h>
44 #include <machine/atomic.h>
56 __NULLABILITY_PRAGMA_PUSH
58 #define SYM_FB10(sym) __CONCAT(sym, _fb10)
59 #define SYM_FBP10(sym) __CONCAT(sym, _fbp10)
60 #define WEAK_REF(sym, alias) __weak_reference(sym, alias)
61 #define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver)
62 #define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver)
64 #define FB10_COMPAT(func, sym) \
65 WEAK_REF(func, SYM_FB10(sym)); \
66 SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0)
68 #define FB10_COMPAT_PRIVATE(func, sym) \
69 WEAK_REF(func, SYM_FBP10(sym)); \
70 SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0)
73 extern struct pthread *_thr_initial __hidden;
75 #include "pthread_md.h"
77 #include "thread_db.h"
79 #ifdef _PTHREAD_FORCED_UNWIND
84 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist;
85 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
86 TAILQ_HEAD(mutex_queue, pthread_mutex);
88 /* Signal to do cancellation */
89 #define SIGCANCEL SIGTHR
92 * Kernel fatal error handler macro.
94 #define PANIC(args...) _thread_exitf(__FILE__, __LINE__, ##args)
96 /* Output debug messages like this: */
97 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
98 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args)
100 #ifdef _PTHREADS_INVARIANTS
101 #define THR_ASSERT(cond, msg) do { \
102 if (__predict_false(!(cond))) \
106 #define THR_ASSERT(cond, msg)
110 # define STATIC_LIB_REQUIRE(name)
112 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name)
115 #define TIMESPEC_ADD(dst, src, val) \
117 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \
118 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
119 if ((dst)->tv_nsec >= 1000000000) { \
121 (dst)->tv_nsec -= 1000000000; \
125 #define TIMESPEC_SUB(dst, src, val) \
127 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \
128 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
129 if ((dst)->tv_nsec < 0) { \
131 (dst)->tv_nsec += 1000000000; \
135 /* Magic cookie set for shared pthread locks and cv's pointers */
136 #define THR_PSHARED_PTR \
137 ((void *)(uintptr_t)((1ULL << (NBBY * sizeof(long) - 1)) | 1))
139 /* XXX These values should be same as those defined in pthread.h */
140 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL)
141 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1)
142 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2)
143 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL)
144 #define THR_COND_DESTROYED ((struct pthread_cond *)1)
145 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL)
146 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1)
148 #define PMUTEX_FLAG_TYPE_MASK 0x0ff
149 #define PMUTEX_FLAG_PRIVATE 0x100
150 #define PMUTEX_FLAG_DEFERRED 0x200
151 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK)
153 #define PMUTEX_OWNER_ID(m) ((m)->m_lock.m_owner & ~UMUTEX_CONTESTED)
155 #define MAX_DEFER_WAITERS 50
158 * Values for pthread_mutex m_ps indicator.
160 #define PMUTEX_INITSTAGE_ALLOC 0
161 #define PMUTEX_INITSTAGE_BUSY 1
162 #define PMUTEX_INITSTAGE_DONE 2
164 struct pthread_mutex {
166 * Lock for accesses to this structure.
168 struct umutex m_lock;
173 int m_ps; /* pshared init stage */
175 * Link for all mutexes a thread currently owns, of the same
178 TAILQ_ENTRY(pthread_mutex) m_qe;
179 /* Link for all private mutexes a thread currently owns. */
180 TAILQ_ENTRY(pthread_mutex) m_pqe;
181 struct pthread_mutex *m_rb_prev;
184 struct pthread_mutex_attr {
185 enum pthread_mutextype m_type;
192 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
193 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE, \
194 PTHREAD_MUTEX_STALLED }
196 struct pthread_cond {
197 __uint32_t __has_user_waiters;
201 struct pthread_cond_attr {
206 struct pthread_barrier {
207 struct umutex b_lock;
216 struct pthread_barrierattr {
220 struct pthread_spinlock {
221 struct umutex s_lock;
225 * Flags for condition variables.
227 #define COND_FLAGS_PRIVATE 0x01
228 #define COND_FLAGS_INITED 0x02
229 #define COND_FLAGS_BUSY 0x04
232 * Cleanup definitions.
234 struct pthread_cleanup {
235 struct pthread_cleanup *prev;
236 void (*routine)(void *);
241 #define THR_CLEANUP_PUSH(td, func, arg) { \
242 struct pthread_cleanup __cup; \
244 __cup.routine = func; \
245 __cup.routine_arg = arg; \
247 __cup.prev = (td)->cleanup; \
248 (td)->cleanup = &__cup;
250 #define THR_CLEANUP_POP(td, exec) \
251 (td)->cleanup = __cup.prev; \
253 __cup.routine(__cup.routine_arg); \
256 struct pthread_atfork {
257 TAILQ_ENTRY(pthread_atfork) qe;
258 void (*prepare)(void);
259 void (*parent)(void);
263 struct pthread_attr {
264 #define pthread_attr_start_copy sched_policy
269 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */
271 void *stackaddr_attr;
272 size_t stacksize_attr;
273 size_t guardsize_attr;
274 #define pthread_attr_end_copy cpuset
280 struct wake_addr *link;
286 TAILQ_HEAD(, pthread) sq_blocked;
287 SLIST_HEAD(, sleepqueue) sq_freeq;
288 LIST_ENTRY(sleepqueue) sq_hash;
289 SLIST_ENTRY(sleepqueue) sq_flink;
295 * Thread creation state attributes.
297 #define THR_CREATE_RUNNING 0
298 #define THR_CREATE_SUSPENDED 1
301 * Miscellaneous definitions.
303 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024)
306 * Maximum size of initial thread's stack. This perhaps deserves to be larger
307 * than the stacks of other threads, since many applications are likely to run
308 * almost entirely on this stack.
310 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2)
313 * Define priorities returned by kernel.
315 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min)
316 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max)
317 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default)
319 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min)
320 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max)
321 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default)
323 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
324 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min)
325 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max)
326 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default)
328 struct pthread_prio {
334 struct pthread_rwlockattr {
338 struct pthread_rwlock {
351 struct pthread_specific_elem {
357 volatile int allocated;
359 void (*destructor)(void *);
363 * lwpid_t is 32bit but kernel thr API exports tid as long type
364 * to preserve the ABI for M:N model in very early date (r131431).
366 #define TID(thread) ((uint32_t) ((thread)->tid))
372 #define _pthread_startzero tid
373 /* Kernel thread id. */
375 #define TID_TERMINATED 1
378 * Lock for accesses to this thread structure.
382 /* Internal condition variable cycle number. */
385 /* How many low level locks the thread held. */
389 * Set to non-zero when this thread has entered a critical
390 * region. We allow for recursive entries into critical regions.
394 /* Signal blocked counter. */
397 /* Queue entry for list of all threads. */
398 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */
400 /* Queue entry for GC lists. */
401 TAILQ_ENTRY(pthread) gcle;
403 /* Hash queue entry. */
404 LIST_ENTRY(pthread) hle;
406 /* Sleep queue entry */
407 TAILQ_ENTRY(pthread) wle;
409 /* Threads reference count. */
413 * Thread start routine, argument, stack pointer and thread
416 void *(*start_routine)(void *);
418 struct pthread_attr attr;
420 #define SHOULD_CANCEL(thr) \
421 ((thr)->cancel_pending && (thr)->cancel_enable && \
422 (thr)->no_cancel == 0)
424 /* Cancellation is enabled */
427 /* Cancellation request is pending */
430 /* Thread is at cancellation point */
433 /* Cancellation is temporarily disabled */
436 /* Asynchronouse cancellation is enabled */
439 /* Cancellation is in progress */
442 /* Thread temporary signal mask. */
445 /* Thread should unblock SIGCANCEL. */
446 int unblock_sigcancel;
448 /* In sigsuspend state */
451 /* deferred signal info */
452 siginfo_t deferred_siginfo;
454 /* signal mask to restore. */
455 sigset_t deferred_sigmask;
457 /* the sigaction should be used for deferred signal. */
458 struct sigaction deferred_sigact;
460 /* deferred signal delivery is performed, do not reenter. */
463 /* Force new thread to exit. */
467 enum pthread_state state;
470 * Error variable used instead of errno. The function __error()
471 * returns a pointer to this.
476 * The joiner is the thread that is joining to this thread. The
477 * join status keeps track of a join operation to another thread.
479 struct pthread *joiner;
481 /* Miscellaneous flags; only set with scheduling lock held. */
483 #define THR_FLAGS_PRIVATE 0x0001
484 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */
485 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */
486 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */
488 /* Thread list flags; only set with thread list lock held. */
490 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */
491 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */
492 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */
495 * Queues of the owned mutexes. Private queue must have index
496 * + 1 of the corresponding full queue.
498 #define TMQ_NORM 0 /* NORMAL or PRIO_INHERIT normal */
499 #define TMQ_NORM_PRIV 1 /* NORMAL or PRIO_INHERIT normal priv */
500 #define TMQ_NORM_PP 2 /* PRIO_PROTECT normal mutexes */
501 #define TMQ_NORM_PP_PRIV 3 /* PRIO_PROTECT normal priv */
502 #define TMQ_ROBUST_PP 4 /* PRIO_PROTECT robust mutexes */
503 #define TMQ_ROBUST_PP_PRIV 5 /* PRIO_PROTECT robust priv */
505 struct mutex_queue mq[TMQ_NITEMS];
508 struct pthread_specific_elem *specific;
509 int specific_data_count;
511 /* Number rwlocks rdlocks held. */
515 * Current locks bitmap for rtld. */
518 /* Thread control block */
521 /* Cleanup handlers Link List */
522 struct pthread_cleanup *cleanup;
524 #ifdef _PTHREAD_FORCED_UNWIND
525 struct _Unwind_Exception ex;
526 void *unwind_stackend;
531 * Magic value to help recognize a valid thread structure
532 * from an invalid one:
534 #define THR_MAGIC ((u_int32_t) 0xd09ba115)
537 /* Enable event reporting */
544 td_event_msg_t event_buf;
549 /* Referenced mutex. */
550 struct pthread_mutex *mutex_obj;
552 /* Thread will sleep. */
555 /* Number of threads deferred. */
559 uintptr_t robust_list;
560 uintptr_t priv_robust_list;
563 /* Deferred threads from pthread_cond_signal. */
564 unsigned int *defer_waiters[MAX_DEFER_WAITERS];
565 #define _pthread_endzero wake_addr
567 struct wake_addr *wake_addr;
568 #define WAKE_ADDR(td) ((td)->wake_addr)
571 struct sleepqueue *sleepqueue;
575 #define THR_SHOULD_GC(thrd) \
576 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \
577 ((thrd)->flags & THR_FLAGS_DETACHED) != 0)
579 #define THR_IN_CRITICAL(thrd) \
580 (((thrd)->locklevel > 0) || \
581 ((thrd)->critical_count > 0))
583 #define THR_CRITICAL_ENTER(thrd) \
584 (thrd)->critical_count++
586 #define THR_CRITICAL_LEAVE(thrd) \
588 (thrd)->critical_count--; \
592 #define THR_UMUTEX_TRYLOCK(thrd, lck) \
593 _thr_umutex_trylock((lck), TID(thrd))
595 #define THR_UMUTEX_LOCK(thrd, lck) \
596 _thr_umutex_lock((lck), TID(thrd))
598 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \
599 _thr_umutex_timedlock((lck), TID(thrd), (timo))
601 #define THR_UMUTEX_UNLOCK(thrd, lck) \
602 _thr_umutex_unlock((lck), TID(thrd))
604 #define THR_LOCK_ACQUIRE(thrd, lck) \
606 (thrd)->locklevel++; \
607 _thr_umutex_lock(lck, TID(thrd)); \
610 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \
612 (thrd)->locklevel++; \
613 _thr_umutex_lock_spin(lck, TID(thrd)); \
616 #ifdef _PTHREADS_INVARIANTS
617 #define THR_ASSERT_LOCKLEVEL(thrd) \
619 if (__predict_false((thrd)->locklevel <= 0)) \
620 _thr_assert_lock_level(); \
623 #define THR_ASSERT_LOCKLEVEL(thrd)
626 #define THR_LOCK_RELEASE(thrd, lck) \
628 THR_ASSERT_LOCKLEVEL(thrd); \
629 _thr_umutex_unlock((lck), TID(thrd)); \
630 (thrd)->locklevel--; \
634 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
635 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
636 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
637 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
639 #define THREAD_LIST_RDLOCK(curthrd) \
641 (curthrd)->locklevel++; \
642 _thr_rwl_rdlock(&_thr_list_lock); \
645 #define THREAD_LIST_WRLOCK(curthrd) \
647 (curthrd)->locklevel++; \
648 _thr_rwl_wrlock(&_thr_list_lock); \
651 #define THREAD_LIST_UNLOCK(curthrd) \
653 _thr_rwl_unlock(&_thr_list_lock); \
654 (curthrd)->locklevel--; \
659 * Macros to insert/remove threads to the all thread list and
662 #define THR_LIST_ADD(thrd) do { \
663 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \
664 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
665 _thr_hash_add(thrd); \
666 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \
669 #define THR_LIST_REMOVE(thrd) do { \
670 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \
671 TAILQ_REMOVE(&_thread_list, thrd, tle); \
672 _thr_hash_remove(thrd); \
673 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \
676 #define THR_GCLIST_ADD(thrd) do { \
677 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \
678 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
679 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \
683 #define THR_GCLIST_REMOVE(thrd) do { \
684 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \
685 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \
686 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \
691 #define THR_REF_ADD(curthread, pthread) { \
692 THR_CRITICAL_ENTER(curthread); \
693 pthread->refcount++; \
696 #define THR_REF_DEL(curthread, pthread) { \
697 pthread->refcount--; \
698 THR_CRITICAL_LEAVE(curthread); \
701 #define GC_NEEDED() (_gc_count >= 5)
703 #define SHOULD_REPORT_EVENT(curthr, e) \
704 (curthr->report_events && \
705 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
707 #ifndef __LIBC_ISTHREADED_DECLARED
708 #define __LIBC_ISTHREADED_DECLARED
709 extern int __isthreaded;
713 * Global variables for the pthread kernel.
716 extern char *_usrstack __hidden;
719 extern int _libthr_debug;
720 extern int _thread_event_mask;
721 extern struct pthread *_thread_last_event;
723 /* List of all threads: */
724 extern pthreadlist _thread_list;
726 /* List of threads needing GC: */
727 extern pthreadlist _thread_gc_list __hidden;
729 extern int _thread_active_threads;
730 extern atfork_head _thr_atfork_list __hidden;
731 extern struct urwlock _thr_atfork_lock __hidden;
733 /* Default thread attributes: */
734 extern struct pthread_attr _pthread_attr_default __hidden;
736 /* Default mutex attributes: */
737 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
738 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden;
740 /* Default condition variable attributes: */
741 extern struct pthread_cond_attr _pthread_condattr_default __hidden;
743 extern struct pthread_prio _thr_priorities[] __hidden;
745 extern int _thr_is_smp __hidden;
747 extern size_t _thr_guard_default __hidden;
748 extern size_t _thr_stack_default __hidden;
749 extern size_t _thr_stack_initial __hidden;
750 extern int _thr_page_size __hidden;
751 extern int _thr_spinloops __hidden;
752 extern int _thr_yieldloops __hidden;
753 extern int _thr_queuefifo __hidden;
755 /* Garbage thread count. */
756 extern int _gc_count __hidden;
758 extern struct umutex _mutex_static_lock __hidden;
759 extern struct umutex _cond_static_lock __hidden;
760 extern struct umutex _rwlock_static_lock __hidden;
761 extern struct umutex _keytable_lock __hidden;
762 extern struct urwlock _thr_list_lock __hidden;
763 extern struct umutex _thr_event_lock __hidden;
764 extern struct umutex _suspend_all_lock __hidden;
765 extern int _suspend_all_waiters __hidden;
766 extern int _suspend_all_cycle __hidden;
767 extern struct pthread *_single_thread __hidden;
770 * Function prototype definitions.
773 int _thr_setthreaded(int) __hidden;
774 int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden;
775 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden;
776 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden;
777 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden;
778 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden;
779 int _mutex_reinit(pthread_mutex_t *) __hidden;
780 void _mutex_fork(struct pthread *curthread) __hidden;
781 int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m)
783 void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m)
785 void _libpthread_init(struct pthread *) __hidden;
786 struct pthread *_thr_alloc(struct pthread *) __hidden;
787 void _thread_exit(const char *, int, const char *) __hidden __dead2;
788 void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2
790 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
791 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden;
792 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
793 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
794 void _thr_rtld_init(void) __hidden;
795 void _thr_rtld_postfork_child(void) __hidden;
796 int _thr_stack_alloc(struct pthread_attr *) __hidden;
797 void _thr_stack_free(struct pthread_attr *) __hidden;
798 void _thr_free(struct pthread *, struct pthread *) __hidden;
799 void _thr_gc(struct pthread *) __hidden;
800 void _thread_cleanupspecific(void) __hidden;
801 void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3);
802 void _thread_vprintf(int, const char *, va_list) __hidden;
803 void _thr_spinlock_init(void) __hidden;
804 void _thr_cancel_enter(struct pthread *) __hidden;
805 void _thr_cancel_enter2(struct pthread *, int) __hidden;
806 void _thr_cancel_leave(struct pthread *, int) __hidden;
807 void _thr_testcancel(struct pthread *) __hidden;
808 void _thr_signal_block(struct pthread *) __hidden;
809 void _thr_signal_unblock(struct pthread *) __hidden;
810 void _thr_signal_init(int) __hidden;
811 void _thr_signal_deinit(void) __hidden;
812 int _thr_send_sig(struct pthread *, int sig) __hidden;
813 void _thr_list_init(void) __hidden;
814 void _thr_hash_add(struct pthread *) __hidden;
815 void _thr_hash_remove(struct pthread *) __hidden;
816 struct pthread *_thr_hash_find(struct pthread *) __hidden;
817 void _thr_link(struct pthread *, struct pthread *) __hidden;
818 void _thr_unlink(struct pthread *, struct pthread *) __hidden;
819 void _thr_assert_lock_level(void) __hidden __dead2;
820 void _thr_ast(struct pthread *) __hidden;
821 void _thr_report_creation(struct pthread *curthread,
822 struct pthread *newthread) __hidden;
823 void _thr_report_death(struct pthread *curthread) __hidden;
824 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
825 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
826 void _thr_signal_prefork(void) __hidden;
827 void _thr_signal_postfork(void) __hidden;
828 void _thr_signal_postfork_child(void) __hidden;
829 void _thr_suspend_all_lock(struct pthread *) __hidden;
830 void _thr_suspend_all_unlock(struct pthread *) __hidden;
831 void _thr_try_gc(struct pthread *, struct pthread *) __hidden;
832 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
833 struct sched_param *param) __hidden;
834 int _schedparam_to_rtp(int policy, const struct sched_param *param,
835 struct rtprio *rtp) __hidden;
836 void _thread_bp_create(void);
837 void _thread_bp_death(void);
838 int _sched_yield(void);
840 void _pthread_cleanup_push(void (*)(void *), void *);
841 void _pthread_cleanup_pop(int);
842 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden;
843 #ifndef _LIBC_PRIVATE_H_
844 void _pthread_cancel_enter(int maycancel);
845 void _pthread_cancel_leave(int maycancel);
847 int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull);
848 int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict,
849 int * _Nonnull __restrict);
850 int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int);
852 /* #include <fcntl.h> */
854 #ifndef _LIBC_PRIVATE_H_
855 int __sys_fcntl(int, int, ...);
856 int __sys_openat(int, const char *, int, ...);
857 #endif /* _LIBC_PRIVATE_H_ */
858 #endif /* _SYS_FCNTL_H_ */
860 /* #include <signal.h> */
862 int __sys_kill(pid_t, int);
863 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
864 int __sys_sigpending(sigset_t *);
865 int __sys_sigreturn(const ucontext_t *);
866 #ifndef _LIBC_PRIVATE_H_
867 int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
868 int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
869 int __sys_sigsuspend(const sigset_t *);
870 int __sys_sigtimedwait(const sigset_t *, siginfo_t *,
871 const struct timespec *);
872 int __sys_sigwait(const sigset_t *, int *);
873 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
874 #endif /* _LIBC_PRIVATE_H_ */
875 #endif /* _SYS_FCNTL_H_ */
877 /* #include <time.h> */
879 #ifndef _LIBC_PRIVATE_H_
880 int __sys_clock_nanosleep(clockid_t, int, const struct timespec *,
882 int __sys_nanosleep(const struct timespec *, struct timespec *);
883 #endif /* _LIBC_PRIVATE_H_ */
884 #endif /* _SYS_FCNTL_H_ */
886 /* #include <sys/ucontext.h> */
887 #ifdef _SYS_UCONTEXT_H_
888 #ifndef _LIBC_PRIVATE_H_
889 int __sys_setcontext(const ucontext_t *ucp);
890 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
891 #endif /* _LIBC_PRIVATE_H_ */
892 #endif /* _SYS_FCNTL_H_ */
894 /* #include <unistd.h> */
896 void __sys_exit(int);
897 pid_t __sys_getpid(void);
898 #ifndef _LIBC_PRIVATE_H_
899 int __sys_close(int);
900 int __sys_fork(void);
901 ssize_t __sys_read(int, void *, size_t);
902 #endif /* _LIBC_PRIVATE_H_ */
903 #endif /* _SYS_FCNTL_H_ */
906 _thr_isthreaded(void)
908 return (__isthreaded != 0);
914 return (_thr_initial != NULL);
918 _thr_check_init(void)
920 if (_thr_initial == NULL)
921 _libpthread_init(NULL);
924 struct wake_addr *_thr_alloc_wake_addr(void);
925 void _thr_release_wake_addr(struct wake_addr *);
926 int _thr_sleep(struct pthread *, int, const struct timespec *);
928 void _thr_wake_addr_init(void) __hidden;
931 _thr_clear_wake(struct pthread *td)
933 td->wake_addr->value = 0;
937 _thr_is_woken(struct pthread *td)
939 return td->wake_addr->value != 0;
943 _thr_set_wake(unsigned int *waddr)
946 _thr_umtx_wake(waddr, INT_MAX, 0);
949 void _thr_wake_all(unsigned int *waddrs[], int) __hidden;
951 static inline struct pthread *
952 _sleepq_first(struct sleepqueue *sq)
954 return TAILQ_FIRST(&sq->sq_blocked);
957 void _sleepq_init(void) __hidden;
958 struct sleepqueue *_sleepq_alloc(void) __hidden;
959 void _sleepq_free(struct sleepqueue *) __hidden;
960 void _sleepq_lock(void *) __hidden;
961 void _sleepq_unlock(void *) __hidden;
962 struct sleepqueue *_sleepq_lookup(void *) __hidden;
963 void _sleepq_add(void *, struct pthread *) __hidden;
964 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden;
965 void _sleepq_drop(struct sleepqueue *,
966 void (*cb)(struct pthread *, void *arg), void *) __hidden;
968 int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
969 void *(calloc_cb)(size_t, size_t));
972 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
973 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
974 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
975 void _thr_stack_fix_protection(struct pthread *thrd);
977 int *__error_threaded(void) __hidden;
978 void __thr_interpose_libc(void) __hidden;
979 pid_t __thr_fork(void);
980 int __thr_setcontext(const ucontext_t *ucp);
981 int __thr_sigaction(int sig, const struct sigaction *act,
982 struct sigaction *oact) __hidden;
983 int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset);
984 int __thr_sigsuspend(const sigset_t * set);
985 int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info,
986 const struct timespec * timeout);
987 int __thr_sigwait(const sigset_t *set, int *sig);
988 int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info);
989 int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
991 void __thr_map_stacks_exec(void);
994 void __thr_spinunlock(struct _spinlock *lck);
995 void __thr_spinlock(struct _spinlock *lck);
997 struct tcb *_tcb_ctor(struct pthread *, int);
998 void _tcb_dtor(struct tcb *);
1000 void __thr_pshared_init(void) __hidden;
1001 void *__thr_pshared_offpage(void *key, int doalloc) __hidden;
1002 void __thr_pshared_destroy(void *key) __hidden;
1003 void __thr_pshared_atfork_pre(void) __hidden;
1004 void __thr_pshared_atfork_post(void) __hidden;
1007 __NULLABILITY_PRAGMA_POP
1009 #endif /* !_THR_PRIVATE_H */