thr_private.h revision 212551 
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 unmodified, this list of conditions, and the following
13 *    disclaimer.
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.
17 *
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.
28 *
29 * $FreeBSD: head/lib/libthr/thread/thr_private.h 212551 2010-09-13 11:57:46Z davidxu $
30 */
31
32#ifndef _THR_PRIVATE_H
33#define _THR_PRIVATE_H
34
35/*
36 * Include files.
37 */
38#include <sys/types.h>
39#include <sys/time.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>
45#include <errno.h>
46#include <limits.h>
47#include <signal.h>
48#include <stddef.h>
49#include <stdio.h>
50#include <unistd.h>
51#include <ucontext.h>
52#include <sys/thr.h>
53#include <pthread.h>
54
55#define	SYM_FB10(sym)			__CONCAT(sym, _fb10)
56#define	SYM_FBP10(sym)			__CONCAT(sym, _fbp10)
57#define	WEAK_REF(sym, alias)		__weak_reference(sym, alias)
58#define	SYM_COMPAT(sym, impl, ver)	__sym_compat(sym, impl, ver)
59#define	SYM_DEFAULT(sym, impl, ver)	__sym_default(sym, impl, ver)
60
61#define	FB10_COMPAT(func, sym)				\
62	WEAK_REF(func, SYM_FB10(sym));			\
63	SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0)
64
65#define	FB10_COMPAT_PRIVATE(func, sym)			\
66	WEAK_REF(func, SYM_FBP10(sym));			\
67	SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0)
68
69#include "pthread_md.h"
70#include "thr_umtx.h"
71#include "thread_db.h"
72
73typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist;
74typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
75TAILQ_HEAD(mutex_queue, pthread_mutex);
76
77/* Signal to do cancellation */
78#define	SIGCANCEL		32
79
80/*
81 * Kernel fatal error handler macro.
82 */
83#define PANIC(string)		_thread_exit(__FILE__,__LINE__,string)
84
85/* Output debug messages like this: */
86#define stdout_debug(args...)	_thread_printf(STDOUT_FILENO, ##args)
87#define stderr_debug(args...)	_thread_printf(STDERR_FILENO, ##args)
88
89#ifdef _PTHREADS_INVARIANTS
90#define THR_ASSERT(cond, msg) do {	\
91	if (__predict_false(!(cond)))	\
92		PANIC(msg);		\
93} while (0)
94#else
95#define THR_ASSERT(cond, msg)
96#endif
97
98#ifdef PIC
99# define STATIC_LIB_REQUIRE(name)
100#else
101# define STATIC_LIB_REQUIRE(name) __asm (".globl " #name)
102#endif
103
104#define	TIMESPEC_ADD(dst, src, val)				\
105	do { 							\
106		(dst)->tv_sec = (src)->tv_sec + (val)->tv_sec;	\
107		(dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
108		if ((dst)->tv_nsec >= 1000000000) {		\
109			(dst)->tv_sec++;			\
110			(dst)->tv_nsec -= 1000000000;		\
111		}						\
112	} while (0)
113
114#define	TIMESPEC_SUB(dst, src, val)				\
115	do { 							\
116		(dst)->tv_sec = (src)->tv_sec - (val)->tv_sec;	\
117		(dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
118		if ((dst)->tv_nsec < 0) {			\
119			(dst)->tv_sec--;			\
120			(dst)->tv_nsec += 1000000000;		\
121		}						\
122	} while (0)
123
124struct pthread_mutex {
125	/*
126	 * Lock for accesses to this structure.
127	 */
128	struct umutex			m_lock;
129	enum pthread_mutextype		m_type;
130	struct pthread			*m_owner;
131	int				m_count;
132	int				m_refcount;
133	int				m_spinloops;
134	int				m_yieldloops;
135	int				m_private;
136	/*
137	 * Link for all mutexes a thread currently owns.
138	 */
139	TAILQ_ENTRY(pthread_mutex)	m_qe;
140};
141
142struct pthread_mutex_attr {
143	enum pthread_mutextype	m_type;
144	int			m_protocol;
145	int			m_ceiling;
146};
147
148#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
149	{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
150
151struct pthread_cond {
152	struct umutex	c_lock;
153	struct ucond	c_kerncv;
154	int		c_pshared;
155	int		c_clockid;
156};
157
158struct pthread_cond_attr {
159	int		c_pshared;
160	int		c_clockid;
161};
162
163struct pthread_barrier {
164	struct umutex		b_lock;
165	struct ucond		b_cv;
166	volatile int64_t	b_cycle;
167	volatile int		b_count;
168	volatile int		b_waiters;
169};
170
171struct pthread_barrierattr {
172	int		pshared;
173};
174
175struct pthread_spinlock {
176	struct umutex	s_lock;
177};
178
179/*
180 * Flags for condition variables.
181 */
182#define COND_FLAGS_PRIVATE	0x01
183#define COND_FLAGS_INITED	0x02
184#define COND_FLAGS_BUSY		0x04
185
186/*
187 * Cleanup definitions.
188 */
189struct pthread_cleanup {
190	struct pthread_cleanup	*prev;
191	void			(*routine)(void *);
192	void			*routine_arg;
193	int			onheap;
194};
195
196#define	THR_CLEANUP_PUSH(td, func, arg) {		\
197	struct pthread_cleanup __cup;			\
198							\
199	__cup.routine = func;				\
200	__cup.routine_arg = arg;			\
201	__cup.onheap = 0;				\
202	__cup.prev = (td)->cleanup;			\
203	(td)->cleanup = &__cup;
204
205#define	THR_CLEANUP_POP(td, exec)			\
206	(td)->cleanup = __cup.prev;			\
207	if ((exec) != 0)				\
208		__cup.routine(__cup.routine_arg);	\
209}
210
211struct pthread_atfork {
212	TAILQ_ENTRY(pthread_atfork) qe;
213	void (*prepare)(void);
214	void (*parent)(void);
215	void (*child)(void);
216};
217
218struct pthread_attr {
219	int	sched_policy;
220	int	sched_inherit;
221	int	prio;
222	int	suspend;
223#define	THR_STACK_USER		0x100	/* 0xFF reserved for <pthread.h> */
224	int	flags;
225	void	*stackaddr_attr;
226	size_t	stacksize_attr;
227	size_t	guardsize_attr;
228	cpuset_t	*cpuset;
229	size_t	cpusetsize;
230};
231
232/*
233 * Thread creation state attributes.
234 */
235#define THR_CREATE_RUNNING		0
236#define THR_CREATE_SUSPENDED		1
237
238/*
239 * Miscellaneous definitions.
240 */
241#define THR_STACK_DEFAULT		(sizeof(void *) / 4 * 1024 * 1024)
242
243/*
244 * Maximum size of initial thread's stack.  This perhaps deserves to be larger
245 * than the stacks of other threads, since many applications are likely to run
246 * almost entirely on this stack.
247 */
248#define THR_STACK_INITIAL		(THR_STACK_DEFAULT * 2)
249
250/*
251 * Define priorities returned by kernel.
252 */
253#define THR_MIN_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_min)
254#define THR_MAX_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_max)
255#define THR_DEF_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_default)
256
257#define THR_MIN_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_min)
258#define THR_MAX_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_max)
259#define THR_DEF_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_default)
260
261/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
262#define THR_MIN_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO_1].pri_min)
263#define THR_MAX_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_max)
264#define THR_DEF_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_default)
265
266struct pthread_prio {
267	int	pri_min;
268	int	pri_max;
269	int	pri_default;
270};
271
272struct pthread_rwlockattr {
273	int		pshared;
274};
275
276struct pthread_rwlock {
277	struct urwlock 	lock;
278	struct pthread	*owner;
279};
280
281/*
282 * Thread states.
283 */
284enum pthread_state {
285	PS_RUNNING,
286	PS_DEAD
287};
288
289struct pthread_specific_elem {
290	const void	*data;
291	int		seqno;
292};
293
294struct pthread_key {
295	volatile int	allocated;
296	int		seqno;
297	void            (*destructor)(void *);
298};
299
300/*
301 * lwpid_t is 32bit but kernel thr API exports tid as long type
302 * in very earily date.
303 */
304#define TID(thread)	((uint32_t) ((thread)->tid))
305
306/*
307 * Thread structure.
308 */
309struct pthread {
310	/* Kernel thread id. */
311	long			tid;
312#define	TID_TERMINATED		1
313
314	/*
315	 * Lock for accesses to this thread structure.
316	 */
317	struct umutex		lock;
318
319	/* Internal condition variable cycle number. */
320	uint32_t		cycle;
321
322	/* How many low level locks the thread held. */
323	int			locklevel;
324
325	/*
326	 * Set to non-zero when this thread has entered a critical
327	 * region.  We allow for recursive entries into critical regions.
328	 */
329	int			critical_count;
330
331	/* Signal blocked counter. */
332	int			sigblock;
333
334	/* Queue entry for list of all threads. */
335	TAILQ_ENTRY(pthread)	tle;	/* link for all threads in process */
336
337	/* Queue entry for GC lists. */
338	TAILQ_ENTRY(pthread)	gcle;
339
340	/* Hash queue entry. */
341	LIST_ENTRY(pthread)	hle;
342
343	/* Threads reference count. */
344	int			refcount;
345
346	/*
347	 * Thread start routine, argument, stack pointer and thread
348	 * attributes.
349	 */
350	void			*(*start_routine)(void *);
351	void			*arg;
352	struct pthread_attr	attr;
353
354#define	SHOULD_CANCEL(thr)					\
355	((thr)->cancel_pending &&				\
356	 ((thr)->cancel_point || (thr)->cancel_async) &&	\
357	 (thr)->cancel_enable && (thr)->cancelling == 0)
358
359	/* Cancellation is enabled */
360	int			cancel_enable;
361
362	/* Cancellation request is pending */
363	int			cancel_pending;
364
365	/* Thread is at cancellation point */
366	int			cancel_point;
367
368	/* Cancellation should be synchoronized */
369	int			cancel_defer;
370
371	/* Asynchronouse cancellation is enabled */
372	int			cancel_async;
373
374	/* Cancellation is in progress */
375	int			cancelling;
376
377	/* Thread temporary signal mask. */
378	sigset_t		sigmask;
379
380	/* Thread should unblock SIGCANCEL. */
381	int			unblock_sigcancel;
382
383	/* In sigsuspend state */
384	int			in_sigsuspend;
385
386	/* deferred signal info	*/
387	siginfo_t		deferred_siginfo;
388
389	/* signal mask to restore. */
390	sigset_t		deferred_sigmask;
391
392	/* the sigaction should be used for deferred signal. */
393	struct sigaction	deferred_sigact;
394
395	/* Force new thread to exit. */
396	int			force_exit;
397
398	/* Thread state: */
399	enum pthread_state 	state;
400
401	/*
402	 * Error variable used instead of errno. The function __error()
403	 * returns a pointer to this.
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	/* Miscellaneous flags; only set with scheduling lock held. */
414	int			flags;
415#define THR_FLAGS_PRIVATE	0x0001
416#define	THR_FLAGS_NEED_SUSPEND	0x0002	/* thread should be suspended */
417#define	THR_FLAGS_SUSPENDED	0x0004	/* thread is suspended */
418#define	THR_FLAGS_IN_GCLIST	0x0008	/* thread in gc list */
419#define	THR_FLAGS_DETACHED	0x0010	/* thread is detached */
420
421	/* Thread list flags; only set with thread list lock held. */
422	int			tlflags;
423#define	TLFLAGS_GC_SAFE		0x0001	/* thread safe for cleaning */
424#define	TLFLAGS_IN_TDLIST	0x0002	/* thread in all thread list */
425
426	/* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */
427	struct mutex_queue	mutexq;
428
429	/* Queue of all owned PRIO_PROTECT mutexes. */
430	struct mutex_queue	pp_mutexq;
431
432	void				*ret;
433	struct pthread_specific_elem	*specific;
434	int				specific_data_count;
435
436	/* Number rwlocks rdlocks held. */
437	int			rdlock_count;
438
439	/*
440	 * Current locks bitmap for rtld. */
441	int			rtld_bits;
442
443	/* Thread control block */
444	struct tcb		*tcb;
445
446	/* Cleanup handlers Link List */
447	struct pthread_cleanup	*cleanup;
448
449	/*
450	 * Magic value to help recognize a valid thread structure
451	 * from an invalid one:
452	 */
453#define	THR_MAGIC		((u_int32_t) 0xd09ba115)
454	u_int32_t		magic;
455
456	/* Enable event reporting */
457	int			report_events;
458
459	/* Event mask */
460	int			event_mask;
461
462	/* Event */
463	td_event_msg_t		event_buf;
464};
465
466#define THR_SHOULD_GC(thrd) 						\
467	((thrd)->refcount == 0 && (thrd)->state == PS_DEAD &&		\
468	 ((thrd)->flags & THR_FLAGS_DETACHED) != 0)
469
470#define	THR_IN_CRITICAL(thrd)				\
471	(((thrd)->locklevel > 0) ||			\
472	((thrd)->critical_count > 0))
473
474#define	THR_CRITICAL_ENTER(thrd)			\
475	(thrd)->critical_count++
476
477#define	THR_CRITICAL_LEAVE(thrd)			\
478	do {						\
479		(thrd)->critical_count--;		\
480		_thr_ast(thrd);				\
481	} while (0)
482
483#define THR_UMUTEX_TRYLOCK(thrd, lck)			\
484	_thr_umutex_trylock((lck), TID(thrd))
485
486#define	THR_UMUTEX_LOCK(thrd, lck)			\
487	_thr_umutex_lock((lck), TID(thrd))
488
489#define	THR_UMUTEX_TIMEDLOCK(thrd, lck, timo)		\
490	_thr_umutex_timedlock((lck), TID(thrd), (timo))
491
492#define	THR_UMUTEX_UNLOCK(thrd, lck)			\
493	_thr_umutex_unlock((lck), TID(thrd))
494
495#define	THR_LOCK_ACQUIRE(thrd, lck)			\
496do {							\
497	(thrd)->locklevel++;				\
498	_thr_umutex_lock(lck, TID(thrd));		\
499} while (0)
500
501#ifdef	_PTHREADS_INVARIANTS
502#define	THR_ASSERT_LOCKLEVEL(thrd)			\
503do {							\
504	if (__predict_false((thrd)->locklevel <= 0))	\
505		_thr_assert_lock_level();		\
506} while (0)
507#else
508#define THR_ASSERT_LOCKLEVEL(thrd)
509#endif
510
511#define	THR_LOCK_RELEASE(thrd, lck)			\
512do {							\
513	THR_ASSERT_LOCKLEVEL(thrd);			\
514	_thr_umutex_unlock((lck), TID(thrd));		\
515	(thrd)->locklevel--;				\
516	_thr_ast(thrd);					\
517} while (0)
518
519#define	THR_LOCK(curthrd)		THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
520#define	THR_UNLOCK(curthrd)		THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
521#define	THR_THREAD_LOCK(curthrd, thr)	THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
522#define	THR_THREAD_UNLOCK(curthrd, thr)	THR_LOCK_RELEASE(curthrd, &(thr)->lock)
523
524#define	THREAD_LIST_RDLOCK(curthrd)				\
525do {								\
526	(curthrd)->locklevel++;					\
527	_thr_rwl_rdlock(&_thr_list_lock);			\
528} while (0)
529
530#define	THREAD_LIST_WRLOCK(curthrd)				\
531do {								\
532	(curthrd)->locklevel++;					\
533	_thr_rwl_wrlock(&_thr_list_lock);			\
534} while (0)
535
536#define	THREAD_LIST_UNLOCK(curthrd)				\
537do {								\
538	_thr_rwl_unlock(&_thr_list_lock);			\
539	(curthrd)->locklevel--;					\
540	_thr_ast(curthrd);					\
541} while (0)
542
543/*
544 * Macros to insert/remove threads to the all thread list and
545 * the gc list.
546 */
547#define	THR_LIST_ADD(thrd) do {					\
548	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) {	\
549		TAILQ_INSERT_HEAD(&_thread_list, thrd, tle);	\
550		_thr_hash_add(thrd);				\
551		(thrd)->tlflags |= TLFLAGS_IN_TDLIST;		\
552	}							\
553} while (0)
554#define	THR_LIST_REMOVE(thrd) do {				\
555	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) {	\
556		TAILQ_REMOVE(&_thread_list, thrd, tle);		\
557		_thr_hash_remove(thrd);				\
558		(thrd)->tlflags &= ~TLFLAGS_IN_TDLIST;		\
559	}							\
560} while (0)
561#define	THR_GCLIST_ADD(thrd) do {				\
562	if (((thrd)->flags & THR_FLAGS_IN_GCLIST) == 0) {	\
563		TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
564		(thrd)->flags |= THR_FLAGS_IN_GCLIST;		\
565		_gc_count++;					\
566	}							\
567} while (0)
568#define	THR_GCLIST_REMOVE(thrd) do {				\
569	if (((thrd)->flags & THR_FLAGS_IN_GCLIST) != 0) {	\
570		TAILQ_REMOVE(&_thread_gc_list, thrd, gcle);	\
571		(thrd)->flags &= ~THR_FLAGS_IN_GCLIST;		\
572		_gc_count--;					\
573	}							\
574} while (0)
575
576#define THR_REF_ADD(curthread, pthread) {			\
577	THR_CRITICAL_ENTER(curthread);				\
578	pthread->refcount++;					\
579} while (0)
580
581#define THR_REF_DEL(curthread, pthread) {			\
582	pthread->refcount--;					\
583	THR_CRITICAL_LEAVE(curthread);				\
584} while (0)
585
586#define GC_NEEDED()	(_gc_count >= 5)
587
588#define SHOULD_REPORT_EVENT(curthr, e)			\
589	(curthr->report_events && 			\
590	 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
591
592extern int __isthreaded;
593
594/*
595 * Global variables for the pthread kernel.
596 */
597
598extern char		*_usrstack __hidden;
599extern struct pthread	*_thr_initial __hidden;
600
601/* For debugger */
602extern int		_libthr_debug;
603extern int		_thread_event_mask;
604extern struct pthread	*_thread_last_event;
605
606/* List of all threads: */
607extern pthreadlist	_thread_list;
608
609/* List of threads needing GC: */
610extern pthreadlist	_thread_gc_list __hidden;
611
612extern int		_thread_active_threads;
613extern atfork_head	_thr_atfork_list __hidden;
614extern struct urwlock	_thr_atfork_lock __hidden;
615
616/* Default thread attributes: */
617extern struct pthread_attr _pthread_attr_default __hidden;
618
619/* Default mutex attributes: */
620extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
621
622/* Default condition variable attributes: */
623extern struct pthread_cond_attr _pthread_condattr_default __hidden;
624
625extern struct pthread_prio _thr_priorities[] __hidden;
626
627extern pid_t	_thr_pid __hidden;
628extern int	_thr_is_smp __hidden;
629
630extern size_t	_thr_guard_default __hidden;
631extern size_t	_thr_stack_default __hidden;
632extern size_t	_thr_stack_initial __hidden;
633extern int	_thr_page_size __hidden;
634extern int	_thr_spinloops __hidden;
635extern int	_thr_yieldloops __hidden;
636
637/* Garbage thread count. */
638extern int	_gc_count __hidden;
639
640extern struct umutex	_mutex_static_lock __hidden;
641extern struct umutex	_cond_static_lock __hidden;
642extern struct umutex	_rwlock_static_lock __hidden;
643extern struct umutex	_keytable_lock __hidden;
644extern struct urwlock	_thr_list_lock __hidden;
645extern struct umutex	_thr_event_lock __hidden;
646
647/*
648 * Function prototype definitions.
649 */
650__BEGIN_DECLS
651int	_thr_setthreaded(int) __hidden;
652int	_mutex_cv_lock(pthread_mutex_t *, int count) __hidden;
653int	_mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden;
654int	_mutex_reinit(pthread_mutex_t *) __hidden;
655void	_mutex_fork(struct pthread *curthread) __hidden;
656void	_libpthread_init(struct pthread *) __hidden;
657struct pthread *_thr_alloc(struct pthread *) __hidden;
658void	_thread_exit(const char *, int, const char *) __hidden __dead2;
659int	_thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
660void	_thr_ref_delete(struct pthread *, struct pthread *) __hidden;
661void	_thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
662int	_thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
663void	_thr_rtld_init(void) __hidden;
664void	_thr_rtld_fini(void) __hidden;
665void	_thr_rtld_postfork_child(void) __hidden;
666int	_thr_stack_alloc(struct pthread_attr *) __hidden;
667void	_thr_stack_free(struct pthread_attr *) __hidden;
668void	_thr_free(struct pthread *, struct pthread *) __hidden;
669void	_thr_gc(struct pthread *) __hidden;
670void    _thread_cleanupspecific(void) __hidden;
671void	_thread_printf(int, const char *, ...) __hidden;
672void	_thr_spinlock_init(void) __hidden;
673void	_thr_cancel_enter(struct pthread *) __hidden;
674void	_thr_cancel_enter2(struct pthread *, int) __hidden;
675void	_thr_cancel_leave(struct pthread *, int) __hidden;
676void	_thr_testcancel(struct pthread *) __hidden;
677void	_thr_signal_block(struct pthread *) __hidden;
678void	_thr_signal_unblock(struct pthread *) __hidden;
679void	_thr_signal_init(void) __hidden;
680void	_thr_signal_deinit(void) __hidden;
681int	_thr_send_sig(struct pthread *, int sig) __hidden;
682void	_thr_list_init(void) __hidden;
683void	_thr_hash_add(struct pthread *) __hidden;
684void	_thr_hash_remove(struct pthread *) __hidden;
685struct pthread *_thr_hash_find(struct pthread *) __hidden;
686void	_thr_link(struct pthread *, struct pthread *) __hidden;
687void	_thr_unlink(struct pthread *, struct pthread *) __hidden;
688void	_thr_assert_lock_level(void) __hidden __dead2;
689void	_thr_ast(struct pthread *) __hidden;
690void	_thr_once_init(void) __hidden;
691void	_thr_report_creation(struct pthread *curthread,
692	    struct pthread *newthread) __hidden;
693void	_thr_report_death(struct pthread *curthread) __hidden;
694int	_thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
695int	_thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
696void	_thr_signal_prefork(void) __hidden;
697void	_thr_signal_postfork(void) __hidden;
698void	_thr_signal_postfork_child(void) __hidden;
699void	_thr_try_gc(struct pthread *, struct pthread *) __hidden;
700int	_rtp_to_schedparam(const struct rtprio *rtp, int *policy,
701		struct sched_param *param) __hidden;
702int	_schedparam_to_rtp(int policy, const struct sched_param *param,
703		struct rtprio *rtp) __hidden;
704void	_thread_bp_create(void);
705void	_thread_bp_death(void);
706int	_sched_yield(void);
707
708void	_pthread_cleanup_push(void (*)(void *), void *);
709void	_pthread_cleanup_pop(int);
710void	_pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden;
711
712
713/* #include <fcntl.h> */
714#ifdef  _SYS_FCNTL_H_
715int     __sys_fcntl(int, int, ...);
716int     __sys_open(const char *, int, ...);
717int     __sys_openat(int, const char *, int, ...);
718#endif
719
720/* #include <signal.h> */
721#ifdef _SIGNAL_H_
722int	__sys_kill(pid_t, int);
723int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);
724int     __sys_sigpending(sigset_t *);
725int     __sys_sigprocmask(int, const sigset_t *, sigset_t *);
726int     __sys_sigsuspend(const sigset_t *);
727int     __sys_sigreturn(const ucontext_t *);
728int     __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
729int	__sys_sigwait(const sigset_t *, int *);
730int	__sys_sigtimedwait(const sigset_t *, siginfo_t *,
731		const struct timespec *);
732int	__sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
733#endif
734
735/* #include <time.h> */
736#ifdef	_TIME_H_
737int	__sys_nanosleep(const struct timespec *, struct timespec *);
738#endif
739
740/* #include <sys/ucontext.h> */
741#ifdef _SYS_UCONTEXT_H_
742int	__sys_setcontext(const ucontext_t *ucp);
743int	__sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
744#endif
745
746/* #include <unistd.h> */
747#ifdef  _UNISTD_H_
748int     __sys_close(int);
749int	__sys_fork(void);
750pid_t	__sys_getpid(void);
751ssize_t __sys_read(int, void *, size_t);
752ssize_t __sys_write(int, const void *, size_t);
753void	__sys_exit(int);
754#endif
755
756int	_umtx_op_err(void *, int op, u_long, void *, void *) __hidden;
757
758static inline int
759_thr_isthreaded(void)
760{
761	return (__isthreaded != 0);
762}
763
764static inline int
765_thr_is_inited(void)
766{
767	return (_thr_initial != NULL);
768}
769
770static inline void
771_thr_check_init(void)
772{
773	if (_thr_initial == NULL)
774		_libpthread_init(NULL);
775}
776
777struct dl_phdr_info;
778void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
779void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
780void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
781
782__END_DECLS
783
784#endif  /* !_THR_PRIVATE_H */
785