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)
72 #include "pthread_md.h"
74 #include "thread_db.h"
76 #ifdef _PTHREAD_FORCED_UNWIND
81 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist;
82 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
83 TAILQ_HEAD(mutex_queue, pthread_mutex);
85 /* Signal to do cancellation */
86 #define SIGCANCEL SIGTHR
89 * Kernel fatal error handler macro.
91 #define PANIC(args...) _thread_exitf(__FILE__, __LINE__, ##args)
93 /* Output debug messages like this: */
94 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
95 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args)
97 #ifdef _PTHREADS_INVARIANTS
98 #define THR_ASSERT(cond, msg) do { \
99 if (__predict_false(!(cond))) \
103 #define THR_ASSERT(cond, msg)
107 # define STATIC_LIB_REQUIRE(name)
109 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name)
112 #define TIMESPEC_ADD(dst, src, val) \
114 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \
115 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
116 if ((dst)->tv_nsec >= 1000000000) { \
118 (dst)->tv_nsec -= 1000000000; \
122 #define TIMESPEC_SUB(dst, src, val) \
124 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \
125 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
126 if ((dst)->tv_nsec < 0) { \
128 (dst)->tv_nsec += 1000000000; \
132 /* Magic cookie set for shared pthread locks and cv's pointers */
133 #define THR_PSHARED_PTR \
134 ((void *)(uintptr_t)((1ULL << (NBBY * sizeof(long) - 1)) | 1))
136 /* XXX These values should be same as those defined in pthread.h */
137 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL)
138 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1)
139 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2)
140 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL)
141 #define THR_COND_DESTROYED ((struct pthread_cond *)1)
142 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL)
143 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1)
145 #define PMUTEX_FLAG_TYPE_MASK 0x0ff
146 #define PMUTEX_FLAG_PRIVATE 0x100
147 #define PMUTEX_FLAG_DEFERRED 0x200
148 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK)
150 #define PMUTEX_OWNER_ID(m) ((m)->m_lock.m_owner & ~UMUTEX_CONTESTED)
152 #define MAX_DEFER_WAITERS 50
155 * Values for pthread_mutex m_ps indicator.
157 #define PMUTEX_INITSTAGE_ALLOC 0
158 #define PMUTEX_INITSTAGE_BUSY 1
159 #define PMUTEX_INITSTAGE_DONE 2
161 struct pthread_mutex {
163 * Lock for accesses to this structure.
165 struct umutex m_lock;
170 int m_ps; /* pshared init stage */
172 * Link for all mutexes a thread currently owns, of the same
175 TAILQ_ENTRY(pthread_mutex) m_qe;
176 /* Link for all private mutexes a thread currently owns. */
177 TAILQ_ENTRY(pthread_mutex) m_pqe;
178 struct pthread_mutex *m_rb_prev;
181 struct pthread_mutex_attr {
182 enum pthread_mutextype m_type;
189 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
190 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE, \
191 PTHREAD_MUTEX_STALLED }
193 struct pthread_cond {
194 __uint32_t __has_user_waiters;
198 struct pthread_cond_attr {
203 struct pthread_barrier {
204 struct umutex b_lock;
213 struct pthread_barrierattr {
217 struct pthread_spinlock {
218 struct umutex s_lock;
222 * Flags for condition variables.
224 #define COND_FLAGS_PRIVATE 0x01
225 #define COND_FLAGS_INITED 0x02
226 #define COND_FLAGS_BUSY 0x04
229 * Cleanup definitions.
231 struct pthread_cleanup {
232 struct pthread_cleanup *prev;
233 void (*routine)(void *);
238 #define THR_CLEANUP_PUSH(td, func, arg) { \
239 struct pthread_cleanup __cup; \
241 __cup.routine = func; \
242 __cup.routine_arg = arg; \
244 __cup.prev = (td)->cleanup; \
245 (td)->cleanup = &__cup;
247 #define THR_CLEANUP_POP(td, exec) \
248 (td)->cleanup = __cup.prev; \
250 __cup.routine(__cup.routine_arg); \
253 struct pthread_atfork {
254 TAILQ_ENTRY(pthread_atfork) qe;
255 void (*prepare)(void);
256 void (*parent)(void);
260 struct pthread_attr {
261 #define pthread_attr_start_copy sched_policy
266 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */
268 void *stackaddr_attr;
269 size_t stacksize_attr;
270 size_t guardsize_attr;
271 #define pthread_attr_end_copy cpuset
277 struct wake_addr *link;
283 TAILQ_HEAD(, pthread) sq_blocked;
284 SLIST_HEAD(, sleepqueue) sq_freeq;
285 LIST_ENTRY(sleepqueue) sq_hash;
286 SLIST_ENTRY(sleepqueue) sq_flink;
292 * Thread creation state attributes.
294 #define THR_CREATE_RUNNING 0
295 #define THR_CREATE_SUSPENDED 1
298 * Miscellaneous definitions.
300 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024)
303 * Maximum size of initial thread's stack. This perhaps deserves to be larger
304 * than the stacks of other threads, since many applications are likely to run
305 * almost entirely on this stack.
307 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2)
310 * Define priorities returned by kernel.
312 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min)
313 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max)
314 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default)
316 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min)
317 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max)
318 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default)
320 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
321 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min)
322 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max)
323 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default)
325 struct pthread_prio {
331 struct pthread_rwlockattr {
335 struct pthread_rwlock {
348 struct pthread_specific_elem {
354 volatile int allocated;
356 void (*destructor)(void *);
360 * lwpid_t is 32bit but kernel thr API exports tid as long type
361 * to preserve the ABI for M:N model in very early date (r131431).
363 #define TID(thread) ((uint32_t) ((thread)->tid))
369 #define _pthread_startzero tid
370 /* Kernel thread id. */
372 #define TID_TERMINATED 1
375 * Lock for accesses to this thread structure.
379 /* Internal condition variable cycle number. */
382 /* How many low level locks the thread held. */
386 * Set to non-zero when this thread has entered a critical
387 * region. We allow for recursive entries into critical regions.
391 /* Signal blocked counter. */
394 /* Queue entry for list of all threads. */
395 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */
397 /* Queue entry for GC lists. */
398 TAILQ_ENTRY(pthread) gcle;
400 /* Hash queue entry. */
401 LIST_ENTRY(pthread) hle;
403 /* Sleep queue entry */
404 TAILQ_ENTRY(pthread) wle;
406 /* Threads reference count. */
410 * Thread start routine, argument, stack pointer and thread
413 void *(*start_routine)(void *);
415 struct pthread_attr attr;
417 #define SHOULD_CANCEL(thr) \
418 ((thr)->cancel_pending && (thr)->cancel_enable && \
419 (thr)->no_cancel == 0)
421 /* Cancellation is enabled */
424 /* Cancellation request is pending */
427 /* Thread is at cancellation point */
430 /* Cancellation is temporarily disabled */
433 /* Asynchronouse cancellation is enabled */
436 /* Cancellation is in progress */
439 /* Thread temporary signal mask. */
442 /* Thread should unblock SIGCANCEL. */
443 int unblock_sigcancel;
445 /* In sigsuspend state */
448 /* deferred signal info */
449 siginfo_t deferred_siginfo;
451 /* signal mask to restore. */
452 sigset_t deferred_sigmask;
454 /* the sigaction should be used for deferred signal. */
455 struct sigaction deferred_sigact;
457 /* deferred signal delivery is performed, do not reenter. */
460 /* Force new thread to exit. */
464 enum pthread_state state;
467 * Error variable used instead of errno. The function __error()
468 * returns a pointer to this.
473 * The joiner is the thread that is joining to this thread. The
474 * join status keeps track of a join operation to another thread.
476 struct pthread *joiner;
478 /* Miscellaneous flags; only set with scheduling lock held. */
480 #define THR_FLAGS_PRIVATE 0x0001
481 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */
482 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */
483 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */
485 /* Thread list flags; only set with thread list lock held. */
487 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */
488 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */
489 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */
492 * Queues of the owned mutexes. Private queue must have index
493 * + 1 of the corresponding full queue.
495 #define TMQ_NORM 0 /* NORMAL or PRIO_INHERIT normal */
496 #define TMQ_NORM_PRIV 1 /* NORMAL or PRIO_INHERIT normal priv */
497 #define TMQ_NORM_PP 2 /* PRIO_PROTECT normal mutexes */
498 #define TMQ_NORM_PP_PRIV 3 /* PRIO_PROTECT normal priv */
499 #define TMQ_ROBUST_PP 4 /* PRIO_PROTECT robust mutexes */
500 #define TMQ_ROBUST_PP_PRIV 5 /* PRIO_PROTECT robust priv */
502 struct mutex_queue mq[TMQ_NITEMS];
505 struct pthread_specific_elem *specific;
506 int specific_data_count;
508 /* Number rwlocks rdlocks held. */
512 * Current locks bitmap for rtld. */
515 /* Thread control block */
518 /* Cleanup handlers Link List */
519 struct pthread_cleanup *cleanup;
521 #ifdef _PTHREAD_FORCED_UNWIND
522 struct _Unwind_Exception ex;
523 void *unwind_stackend;
528 * Magic value to help recognize a valid thread structure
529 * from an invalid one:
531 #define THR_MAGIC ((u_int32_t) 0xd09ba115)
534 /* Enable event reporting */
541 td_event_msg_t event_buf;
546 /* Referenced mutex. */
547 struct pthread_mutex *mutex_obj;
549 /* Thread will sleep. */
552 /* Number of threads deferred. */
556 uintptr_t robust_list;
557 uintptr_t priv_robust_list;
560 /* Deferred threads from pthread_cond_signal. */
561 unsigned int *defer_waiters[MAX_DEFER_WAITERS];
562 #define _pthread_endzero wake_addr
564 struct wake_addr *wake_addr;
565 #define WAKE_ADDR(td) ((td)->wake_addr)
568 struct sleepqueue *sleepqueue;
572 #define THR_SHOULD_GC(thrd) \
573 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \
574 ((thrd)->flags & THR_FLAGS_DETACHED) != 0)
576 #define THR_IN_CRITICAL(thrd) \
577 (((thrd)->locklevel > 0) || \
578 ((thrd)->critical_count > 0))
580 #define THR_CRITICAL_ENTER(thrd) \
581 (thrd)->critical_count++
583 #define THR_CRITICAL_LEAVE(thrd) \
585 (thrd)->critical_count--; \
589 #define THR_UMUTEX_TRYLOCK(thrd, lck) \
590 _thr_umutex_trylock((lck), TID(thrd))
592 #define THR_UMUTEX_LOCK(thrd, lck) \
593 _thr_umutex_lock((lck), TID(thrd))
595 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \
596 _thr_umutex_timedlock((lck), TID(thrd), (timo))
598 #define THR_UMUTEX_UNLOCK(thrd, lck) \
599 _thr_umutex_unlock((lck), TID(thrd))
601 #define THR_LOCK_ACQUIRE(thrd, lck) \
603 (thrd)->locklevel++; \
604 _thr_umutex_lock(lck, TID(thrd)); \
607 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \
609 (thrd)->locklevel++; \
610 _thr_umutex_lock_spin(lck, TID(thrd)); \
613 #ifdef _PTHREADS_INVARIANTS
614 #define THR_ASSERT_LOCKLEVEL(thrd) \
616 if (__predict_false((thrd)->locklevel <= 0)) \
617 _thr_assert_lock_level(); \
620 #define THR_ASSERT_LOCKLEVEL(thrd)
623 #define THR_LOCK_RELEASE(thrd, lck) \
625 THR_ASSERT_LOCKLEVEL(thrd); \
626 _thr_umutex_unlock((lck), TID(thrd)); \
627 (thrd)->locklevel--; \
631 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
632 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
633 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
634 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
636 #define THREAD_LIST_RDLOCK(curthrd) \
638 (curthrd)->locklevel++; \
639 _thr_rwl_rdlock(&_thr_list_lock); \
642 #define THREAD_LIST_WRLOCK(curthrd) \
644 (curthrd)->locklevel++; \
645 _thr_rwl_wrlock(&_thr_list_lock); \
648 #define THREAD_LIST_UNLOCK(curthrd) \
650 _thr_rwl_unlock(&_thr_list_lock); \
651 (curthrd)->locklevel--; \
656 * Macros to insert/remove threads to the all thread list and
659 #define THR_LIST_ADD(thrd) do { \
660 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \
661 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
662 _thr_hash_add(thrd); \
663 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \
666 #define THR_LIST_REMOVE(thrd) do { \
667 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \
668 TAILQ_REMOVE(&_thread_list, thrd, tle); \
669 _thr_hash_remove(thrd); \
670 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \
673 #define THR_GCLIST_ADD(thrd) do { \
674 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \
675 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
676 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \
680 #define THR_GCLIST_REMOVE(thrd) do { \
681 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \
682 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \
683 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \
688 #define THR_REF_ADD(curthread, pthread) { \
689 THR_CRITICAL_ENTER(curthread); \
690 pthread->refcount++; \
693 #define THR_REF_DEL(curthread, pthread) { \
694 pthread->refcount--; \
695 THR_CRITICAL_LEAVE(curthread); \
698 #define GC_NEEDED() (_gc_count >= 5)
700 #define SHOULD_REPORT_EVENT(curthr, e) \
701 (curthr->report_events && \
702 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
704 extern int __isthreaded;
707 * Global variables for the pthread kernel.
710 extern char *_usrstack __hidden;
711 extern struct pthread *_thr_initial __hidden;
714 extern int _libthr_debug;
715 extern int _thread_event_mask;
716 extern struct pthread *_thread_last_event;
718 /* List of all threads: */
719 extern pthreadlist _thread_list;
721 /* List of threads needing GC: */
722 extern pthreadlist _thread_gc_list __hidden;
724 extern int _thread_active_threads;
725 extern atfork_head _thr_atfork_list __hidden;
726 extern struct urwlock _thr_atfork_lock __hidden;
728 /* Default thread attributes: */
729 extern struct pthread_attr _pthread_attr_default __hidden;
731 /* Default mutex attributes: */
732 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
733 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden;
735 /* Default condition variable attributes: */
736 extern struct pthread_cond_attr _pthread_condattr_default __hidden;
738 extern struct pthread_prio _thr_priorities[] __hidden;
740 extern int _thr_is_smp __hidden;
742 extern size_t _thr_guard_default __hidden;
743 extern size_t _thr_stack_default __hidden;
744 extern size_t _thr_stack_initial __hidden;
745 extern int _thr_page_size __hidden;
746 extern int _thr_spinloops __hidden;
747 extern int _thr_yieldloops __hidden;
748 extern int _thr_queuefifo __hidden;
750 /* Garbage thread count. */
751 extern int _gc_count __hidden;
753 extern struct umutex _mutex_static_lock __hidden;
754 extern struct umutex _cond_static_lock __hidden;
755 extern struct umutex _rwlock_static_lock __hidden;
756 extern struct umutex _keytable_lock __hidden;
757 extern struct urwlock _thr_list_lock __hidden;
758 extern struct umutex _thr_event_lock __hidden;
759 extern struct umutex _suspend_all_lock __hidden;
760 extern int _suspend_all_waiters __hidden;
761 extern int _suspend_all_cycle __hidden;
762 extern struct pthread *_single_thread __hidden;
765 * Function prototype definitions.
768 int _thr_setthreaded(int) __hidden;
769 int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden;
770 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden;
771 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden;
772 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden;
773 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden;
774 int _mutex_reinit(pthread_mutex_t *) __hidden;
775 void _mutex_fork(struct pthread *curthread) __hidden;
776 int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m)
778 void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m)
780 void _libpthread_init(struct pthread *) __hidden;
781 struct pthread *_thr_alloc(struct pthread *) __hidden;
782 void _thread_exit(const char *, int, const char *) __hidden __dead2;
783 void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2
785 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
786 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden;
787 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
788 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
789 void _thr_rtld_init(void) __hidden;
790 void _thr_rtld_postfork_child(void) __hidden;
791 int _thr_stack_alloc(struct pthread_attr *) __hidden;
792 void _thr_stack_free(struct pthread_attr *) __hidden;
793 void _thr_free(struct pthread *, struct pthread *) __hidden;
794 void _thr_gc(struct pthread *) __hidden;
795 void _thread_cleanupspecific(void) __hidden;
796 void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3);
797 void _thread_vprintf(int, const char *, va_list) __hidden;
798 void _thr_spinlock_init(void) __hidden;
799 void _thr_cancel_enter(struct pthread *) __hidden;
800 void _thr_cancel_enter2(struct pthread *, int) __hidden;
801 void _thr_cancel_leave(struct pthread *, int) __hidden;
802 void _thr_testcancel(struct pthread *) __hidden;
803 void _thr_signal_block(struct pthread *) __hidden;
804 void _thr_signal_unblock(struct pthread *) __hidden;
805 void _thr_signal_init(int) __hidden;
806 void _thr_signal_deinit(void) __hidden;
807 int _thr_send_sig(struct pthread *, int sig) __hidden;
808 void _thr_list_init(void) __hidden;
809 void _thr_hash_add(struct pthread *) __hidden;
810 void _thr_hash_remove(struct pthread *) __hidden;
811 struct pthread *_thr_hash_find(struct pthread *) __hidden;
812 void _thr_link(struct pthread *, struct pthread *) __hidden;
813 void _thr_unlink(struct pthread *, struct pthread *) __hidden;
814 void _thr_assert_lock_level(void) __hidden __dead2;
815 void _thr_ast(struct pthread *) __hidden;
816 void _thr_report_creation(struct pthread *curthread,
817 struct pthread *newthread) __hidden;
818 void _thr_report_death(struct pthread *curthread) __hidden;
819 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
820 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
821 void _thr_signal_prefork(void) __hidden;
822 void _thr_signal_postfork(void) __hidden;
823 void _thr_signal_postfork_child(void) __hidden;
824 void _thr_suspend_all_lock(struct pthread *) __hidden;
825 void _thr_suspend_all_unlock(struct pthread *) __hidden;
826 void _thr_try_gc(struct pthread *, struct pthread *) __hidden;
827 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
828 struct sched_param *param) __hidden;
829 int _schedparam_to_rtp(int policy, const struct sched_param *param,
830 struct rtprio *rtp) __hidden;
831 void _thread_bp_create(void);
832 void _thread_bp_death(void);
833 int _sched_yield(void);
835 void _pthread_cleanup_push(void (*)(void *), void *);
836 void _pthread_cleanup_pop(int);
837 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden;
838 void _pthread_cancel_enter(int maycancel);
839 void _pthread_cancel_leave(int maycancel);
840 int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull);
841 int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict,
842 int * _Nonnull __restrict);
843 int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int);
845 /* #include <fcntl.h> */
847 int __sys_fcntl(int, int, ...);
848 int __sys_openat(int, const char *, int, ...);
851 /* #include <signal.h> */
853 int __sys_kill(pid_t, int);
854 int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
855 int __sys_sigpending(sigset_t *);
856 int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
857 int __sys_sigsuspend(const sigset_t *);
858 int __sys_sigreturn(const ucontext_t *);
859 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
860 int __sys_sigwait(const sigset_t *, int *);
861 int __sys_sigtimedwait(const sigset_t *, siginfo_t *,
862 const struct timespec *);
863 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
866 /* #include <time.h> */
868 int __sys_nanosleep(const struct timespec *, struct timespec *);
871 /* #include <sys/ucontext.h> */
872 #ifdef _SYS_UCONTEXT_H_
873 int __sys_setcontext(const ucontext_t *ucp);
874 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
877 /* #include <unistd.h> */
879 int __sys_close(int);
880 int __sys_fork(void);
881 pid_t __sys_getpid(void);
882 ssize_t __sys_read(int, void *, size_t);
883 void __sys_exit(int);
887 _thr_isthreaded(void)
889 return (__isthreaded != 0);
895 return (_thr_initial != NULL);
899 _thr_check_init(void)
901 if (_thr_initial == NULL)
902 _libpthread_init(NULL);
905 struct wake_addr *_thr_alloc_wake_addr(void);
906 void _thr_release_wake_addr(struct wake_addr *);
907 int _thr_sleep(struct pthread *, int, const struct timespec *);
909 void _thr_wake_addr_init(void) __hidden;
912 _thr_clear_wake(struct pthread *td)
914 td->wake_addr->value = 0;
918 _thr_is_woken(struct pthread *td)
920 return td->wake_addr->value != 0;
924 _thr_set_wake(unsigned int *waddr)
927 _thr_umtx_wake(waddr, INT_MAX, 0);
930 void _thr_wake_all(unsigned int *waddrs[], int) __hidden;
932 static inline struct pthread *
933 _sleepq_first(struct sleepqueue *sq)
935 return TAILQ_FIRST(&sq->sq_blocked);
938 void _sleepq_init(void) __hidden;
939 struct sleepqueue *_sleepq_alloc(void) __hidden;
940 void _sleepq_free(struct sleepqueue *) __hidden;
941 void _sleepq_lock(void *) __hidden;
942 void _sleepq_unlock(void *) __hidden;
943 struct sleepqueue *_sleepq_lookup(void *) __hidden;
944 void _sleepq_add(void *, struct pthread *) __hidden;
945 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden;
946 void _sleepq_drop(struct sleepqueue *,
947 void (*cb)(struct pthread *, void *arg), void *) __hidden;
949 int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
950 void *(calloc_cb)(size_t, size_t));
953 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
954 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
955 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
956 void _thr_stack_fix_protection(struct pthread *thrd);
958 int *__error_threaded(void) __hidden;
959 void __thr_interpose_libc(void) __hidden;
960 pid_t __thr_fork(void);
961 int __thr_setcontext(const ucontext_t *ucp);
962 int __thr_sigaction(int sig, const struct sigaction *act,
963 struct sigaction *oact) __hidden;
964 int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset);
965 int __thr_sigsuspend(const sigset_t * set);
966 int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info,
967 const struct timespec * timeout);
968 int __thr_sigwait(const sigset_t *set, int *sig);
969 int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info);
970 int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
972 void __thr_map_stacks_exec(void);
975 void __thr_spinunlock(struct _spinlock *lck);
976 void __thr_spinlock(struct _spinlock *lck);
978 struct tcb *_tcb_ctor(struct pthread *, int);
979 void _tcb_dtor(struct tcb *);
981 void __thr_pshared_init(void) __hidden;
982 void *__thr_pshared_offpage(void *key, int doalloc) __hidden;
983 void __thr_pshared_destroy(void *key) __hidden;
984 void __thr_pshared_atfork_pre(void) __hidden;
985 void __thr_pshared_atfork_post(void) __hidden;
988 __NULLABILITY_PRAGMA_POP
990 #endif /* !_THR_PRIVATE_H */