thr_private.h revision 214334 
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 214334 2010-10-25 09:16:04Z 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
73#ifdef _PTHREAD_FORCED_UNWIND
74#define _BSD_SOURCE
75#include <unwind.h>
76#endif
77
78typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist;
79typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
80TAILQ_HEAD(mutex_queue, pthread_mutex);
81
82/* Signal to do cancellation */
83#define	SIGCANCEL		32
84
85/*
86 * Kernel fatal error handler macro.
87 */
88#define PANIC(string)		_thread_exit(__FILE__,__LINE__,string)
89
90/* Output debug messages like this: */
91#define stdout_debug(args...)	_thread_printf(STDOUT_FILENO, ##args)
92#define stderr_debug(args...)	_thread_printf(STDERR_FILENO, ##args)
93
94#ifdef _PTHREADS_INVARIANTS
95#define THR_ASSERT(cond, msg) do {	\
96	if (__predict_false(!(cond)))	\
97		PANIC(msg);		\
98} while (0)
99#else
100#define THR_ASSERT(cond, msg)
101#endif
102
103#ifdef PIC
104# define STATIC_LIB_REQUIRE(name)
105#else
106# define STATIC_LIB_REQUIRE(name) __asm (".globl " #name)
107#endif
108
109#define	TIMESPEC_ADD(dst, src, val)				\
110	do { 							\
111		(dst)->tv_sec = (src)->tv_sec + (val)->tv_sec;	\
112		(dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
113		if ((dst)->tv_nsec >= 1000000000) {		\
114			(dst)->tv_sec++;			\
115			(dst)->tv_nsec -= 1000000000;		\
116		}						\
117	} while (0)
118
119#define	TIMESPEC_SUB(dst, src, val)				\
120	do { 							\
121		(dst)->tv_sec = (src)->tv_sec - (val)->tv_sec;	\
122		(dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
123		if ((dst)->tv_nsec < 0) {			\
124			(dst)->tv_sec--;			\
125			(dst)->tv_nsec += 1000000000;		\
126		}						\
127	} while (0)
128
129/* XXX These values should be same as those defined in pthread.h */
130#define	THR_MUTEX_INITIALIZER		((struct pthread_mutex *)NULL)
131#define	THR_ADAPTIVE_MUTEX_INITIALIZER	((struct pthread_mutex *)1)
132#define	THR_MUTEX_DESTROYED		((struct pthread_mutex *)2)
133#define	THR_COND_INITIALIZER		((struct pthread_cond *)NULL)
134#define	THR_COND_DESTROYED		((struct pthread_cond *)1)
135#define	THR_RWLOCK_INITIALIZER		((struct pthread_rwlock *)NULL)
136#define	THR_RWLOCK_DESTROYED		((struct pthread_rwlock *)1)
137
138struct pthread_mutex {
139	/*
140	 * Lock for accesses to this structure.
141	 */
142	struct umutex			m_lock;
143	enum pthread_mutextype		m_type;
144	struct pthread			*m_owner;
145	int				m_count;
146	int				m_refcount;
147	int				m_spinloops;
148	int				m_yieldloops;
149	int				m_private;
150	/*
151	 * Link for all mutexes a thread currently owns.
152	 */
153	TAILQ_ENTRY(pthread_mutex)	m_qe;
154};
155
156struct pthread_mutex_attr {
157	enum pthread_mutextype	m_type;
158	int			m_protocol;
159	int			m_ceiling;
160};
161
162#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
163	{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
164
165struct pthread_cond {
166	struct umutex	c_lock;
167	struct ucond	c_kerncv;
168	int		c_pshared;
169	int		c_clockid;
170};
171
172struct pthread_cond_attr {
173	int		c_pshared;
174	int		c_clockid;
175};
176
177struct pthread_barrier {
178	struct umutex		b_lock;
179	struct ucond		b_cv;
180	volatile int64_t	b_cycle;
181	volatile int		b_count;
182	volatile int		b_waiters;
183};
184
185struct pthread_barrierattr {
186	int		pshared;
187};
188
189struct pthread_spinlock {
190	struct umutex	s_lock;
191};
192
193/*
194 * Flags for condition variables.
195 */
196#define COND_FLAGS_PRIVATE	0x01
197#define COND_FLAGS_INITED	0x02
198#define COND_FLAGS_BUSY		0x04
199
200/*
201 * Cleanup definitions.
202 */
203struct pthread_cleanup {
204	struct pthread_cleanup	*prev;
205	void			(*routine)(void *);
206	void			*routine_arg;
207	int			onheap;
208};
209
210#define	THR_CLEANUP_PUSH(td, func, arg) {		\
211	struct pthread_cleanup __cup;			\
212							\
213	__cup.routine = func;				\
214	__cup.routine_arg = arg;			\
215	__cup.onheap = 0;				\
216	__cup.prev = (td)->cleanup;			\
217	(td)->cleanup = &__cup;
218
219#define	THR_CLEANUP_POP(td, exec)			\
220	(td)->cleanup = __cup.prev;			\
221	if ((exec) != 0)				\
222		__cup.routine(__cup.routine_arg);	\
223}
224
225struct pthread_atfork {
226	TAILQ_ENTRY(pthread_atfork) qe;
227	void (*prepare)(void);
228	void (*parent)(void);
229	void (*child)(void);
230};
231
232struct pthread_attr {
233#define pthread_attr_start_copy	sched_policy
234	int	sched_policy;
235	int	sched_inherit;
236	int	prio;
237	int	suspend;
238#define	THR_STACK_USER		0x100	/* 0xFF reserved for <pthread.h> */
239	int	flags;
240	void	*stackaddr_attr;
241	size_t	stacksize_attr;
242	size_t	guardsize_attr;
243#define pthread_attr_end_copy	cpuset
244	cpuset_t	*cpuset;
245	size_t	cpusetsize;
246};
247
248/*
249 * Thread creation state attributes.
250 */
251#define THR_CREATE_RUNNING		0
252#define THR_CREATE_SUSPENDED		1
253
254/*
255 * Miscellaneous definitions.
256 */
257#define THR_STACK_DEFAULT		(sizeof(void *) / 4 * 1024 * 1024)
258
259/*
260 * Maximum size of initial thread's stack.  This perhaps deserves to be larger
261 * than the stacks of other threads, since many applications are likely to run
262 * almost entirely on this stack.
263 */
264#define THR_STACK_INITIAL		(THR_STACK_DEFAULT * 2)
265
266/*
267 * Define priorities returned by kernel.
268 */
269#define THR_MIN_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_min)
270#define THR_MAX_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_max)
271#define THR_DEF_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_default)
272
273#define THR_MIN_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_min)
274#define THR_MAX_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_max)
275#define THR_DEF_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_default)
276
277/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
278#define THR_MIN_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO_1].pri_min)
279#define THR_MAX_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_max)
280#define THR_DEF_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_default)
281
282struct pthread_prio {
283	int	pri_min;
284	int	pri_max;
285	int	pri_default;
286};
287
288struct pthread_rwlockattr {
289	int		pshared;
290};
291
292struct pthread_rwlock {
293	struct urwlock 	lock;
294	struct pthread	*owner;
295};
296
297/*
298 * Thread states.
299 */
300enum pthread_state {
301	PS_RUNNING,
302	PS_DEAD
303};
304
305struct pthread_specific_elem {
306	const void	*data;
307	int		seqno;
308};
309
310struct pthread_key {
311	volatile int	allocated;
312	int		seqno;
313	void            (*destructor)(void *);
314};
315
316/*
317 * lwpid_t is 32bit but kernel thr API exports tid as long type
318 * in very earily date.
319 */
320#define TID(thread)	((uint32_t) ((thread)->tid))
321
322/*
323 * Thread structure.
324 */
325struct pthread {
326	/* Kernel thread id. */
327	long			tid;
328#define	TID_TERMINATED		1
329
330	/*
331	 * Lock for accesses to this thread structure.
332	 */
333	struct umutex		lock;
334
335	/* Internal condition variable cycle number. */
336	uint32_t		cycle;
337
338	/* How many low level locks the thread held. */
339	int			locklevel;
340
341	/*
342	 * Set to non-zero when this thread has entered a critical
343	 * region.  We allow for recursive entries into critical regions.
344	 */
345	int			critical_count;
346
347	/* Signal blocked counter. */
348	int			sigblock;
349
350	/* Queue entry for list of all threads. */
351	TAILQ_ENTRY(pthread)	tle;	/* link for all threads in process */
352
353	/* Queue entry for GC lists. */
354	TAILQ_ENTRY(pthread)	gcle;
355
356	/* Hash queue entry. */
357	LIST_ENTRY(pthread)	hle;
358
359	/* Threads reference count. */
360	int			refcount;
361
362	/*
363	 * Thread start routine, argument, stack pointer and thread
364	 * attributes.
365	 */
366	void			*(*start_routine)(void *);
367	void			*arg;
368	struct pthread_attr	attr;
369
370#define	SHOULD_CANCEL(thr)					\
371	((thr)->cancel_pending && (thr)->cancel_enable &&	\
372	 (thr)->no_cancel == 0)
373
374	/* Cancellation is enabled */
375	int			cancel_enable;
376
377	/* Cancellation request is pending */
378	int			cancel_pending;
379
380	/* Thread is at cancellation point */
381	int			cancel_point;
382
383	/* Cancellation is temporarily disabled */
384	int			no_cancel;
385
386	/* Asynchronouse cancellation is enabled */
387	int			cancel_async;
388
389	/* Cancellation is in progress */
390	int			cancelling;
391
392	/* Thread temporary signal mask. */
393	sigset_t		sigmask;
394
395	/* Thread should unblock SIGCANCEL. */
396	int			unblock_sigcancel;
397
398	/* In sigsuspend state */
399	int			in_sigsuspend;
400
401	/* deferred signal info	*/
402	siginfo_t		deferred_siginfo;
403
404	/* signal mask to restore. */
405	sigset_t		deferred_sigmask;
406
407	/* the sigaction should be used for deferred signal. */
408	struct sigaction	deferred_sigact;
409
410	/* Force new thread to exit. */
411	int			force_exit;
412
413	/* Thread state: */
414	enum pthread_state 	state;
415
416	/*
417	 * Error variable used instead of errno. The function __error()
418	 * returns a pointer to this.
419	 */
420	int			error;
421
422	/*
423	 * The joiner is the thread that is joining to this thread.  The
424	 * join status keeps track of a join operation to another thread.
425	 */
426	struct pthread		*joiner;
427
428	/* Miscellaneous flags; only set with scheduling lock held. */
429	int			flags;
430#define THR_FLAGS_PRIVATE	0x0001
431#define	THR_FLAGS_NEED_SUSPEND	0x0002	/* thread should be suspended */
432#define	THR_FLAGS_SUSPENDED	0x0004	/* thread is suspended */
433#define	THR_FLAGS_DETACHED	0x0008	/* thread is detached */
434
435	/* Thread list flags; only set with thread list lock held. */
436	int			tlflags;
437#define	TLFLAGS_GC_SAFE		0x0001	/* thread safe for cleaning */
438#define	TLFLAGS_IN_TDLIST	0x0002	/* thread in all thread list */
439#define	TLFLAGS_IN_GCLIST	0x0004	/* thread in gc list */
440
441	/* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */
442	struct mutex_queue	mutexq;
443
444	/* Queue of all owned PRIO_PROTECT mutexes. */
445	struct mutex_queue	pp_mutexq;
446
447	void				*ret;
448	struct pthread_specific_elem	*specific;
449	int				specific_data_count;
450
451	/* Number rwlocks rdlocks held. */
452	int			rdlock_count;
453
454	/*
455	 * Current locks bitmap for rtld. */
456	int			rtld_bits;
457
458	/* Thread control block */
459	struct tcb		*tcb;
460
461	/* Cleanup handlers Link List */
462	struct pthread_cleanup	*cleanup;
463
464#ifdef _PTHREAD_FORCED_UNWIND
465	struct _Unwind_Exception	ex;
466	void			*unwind_stackend;
467	int			unwind_disabled;
468#endif
469
470	/*
471	 * Magic value to help recognize a valid thread structure
472	 * from an invalid one:
473	 */
474#define	THR_MAGIC		((u_int32_t) 0xd09ba115)
475	u_int32_t		magic;
476
477	/* Enable event reporting */
478	int			report_events;
479
480	/* Event mask */
481	int			event_mask;
482
483	/* Event */
484	td_event_msg_t		event_buf;
485};
486
487#define THR_SHOULD_GC(thrd) 						\
488	((thrd)->refcount == 0 && (thrd)->state == PS_DEAD &&		\
489	 ((thrd)->flags & THR_FLAGS_DETACHED) != 0)
490
491#define	THR_IN_CRITICAL(thrd)				\
492	(((thrd)->locklevel > 0) ||			\
493	((thrd)->critical_count > 0))
494
495#define	THR_CRITICAL_ENTER(thrd)			\
496	(thrd)->critical_count++
497
498#define	THR_CRITICAL_LEAVE(thrd)			\
499	do {						\
500		(thrd)->critical_count--;		\
501		_thr_ast(thrd);				\
502	} while (0)
503
504#define THR_UMUTEX_TRYLOCK(thrd, lck)			\
505	_thr_umutex_trylock((lck), TID(thrd))
506
507#define	THR_UMUTEX_LOCK(thrd, lck)			\
508	_thr_umutex_lock((lck), TID(thrd))
509
510#define	THR_UMUTEX_TIMEDLOCK(thrd, lck, timo)		\
511	_thr_umutex_timedlock((lck), TID(thrd), (timo))
512
513#define	THR_UMUTEX_UNLOCK(thrd, lck)			\
514	_thr_umutex_unlock((lck), TID(thrd))
515
516#define	THR_LOCK_ACQUIRE(thrd, lck)			\
517do {							\
518	(thrd)->locklevel++;				\
519	_thr_umutex_lock(lck, TID(thrd));		\
520} while (0)
521
522#ifdef	_PTHREADS_INVARIANTS
523#define	THR_ASSERT_LOCKLEVEL(thrd)			\
524do {							\
525	if (__predict_false((thrd)->locklevel <= 0))	\
526		_thr_assert_lock_level();		\
527} while (0)
528#else
529#define THR_ASSERT_LOCKLEVEL(thrd)
530#endif
531
532#define	THR_LOCK_RELEASE(thrd, lck)			\
533do {							\
534	THR_ASSERT_LOCKLEVEL(thrd);			\
535	_thr_umutex_unlock((lck), TID(thrd));		\
536	(thrd)->locklevel--;				\
537	_thr_ast(thrd);					\
538} while (0)
539
540#define	THR_LOCK(curthrd)		THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
541#define	THR_UNLOCK(curthrd)		THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
542#define	THR_THREAD_LOCK(curthrd, thr)	THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
543#define	THR_THREAD_UNLOCK(curthrd, thr)	THR_LOCK_RELEASE(curthrd, &(thr)->lock)
544
545#define	THREAD_LIST_RDLOCK(curthrd)				\
546do {								\
547	(curthrd)->locklevel++;					\
548	_thr_rwl_rdlock(&_thr_list_lock);			\
549} while (0)
550
551#define	THREAD_LIST_WRLOCK(curthrd)				\
552do {								\
553	(curthrd)->locklevel++;					\
554	_thr_rwl_wrlock(&_thr_list_lock);			\
555} while (0)
556
557#define	THREAD_LIST_UNLOCK(curthrd)				\
558do {								\
559	_thr_rwl_unlock(&_thr_list_lock);			\
560	(curthrd)->locklevel--;					\
561	_thr_ast(curthrd);					\
562} while (0)
563
564/*
565 * Macros to insert/remove threads to the all thread list and
566 * the gc list.
567 */
568#define	THR_LIST_ADD(thrd) do {					\
569	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) {	\
570		TAILQ_INSERT_HEAD(&_thread_list, thrd, tle);	\
571		_thr_hash_add(thrd);				\
572		(thrd)->tlflags |= TLFLAGS_IN_TDLIST;		\
573	}							\
574} while (0)
575#define	THR_LIST_REMOVE(thrd) do {				\
576	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) {	\
577		TAILQ_REMOVE(&_thread_list, thrd, tle);		\
578		_thr_hash_remove(thrd);				\
579		(thrd)->tlflags &= ~TLFLAGS_IN_TDLIST;		\
580	}							\
581} while (0)
582#define	THR_GCLIST_ADD(thrd) do {				\
583	if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) {	\
584		TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
585		(thrd)->tlflags |= TLFLAGS_IN_GCLIST;		\
586		_gc_count++;					\
587	}							\
588} while (0)
589#define	THR_GCLIST_REMOVE(thrd) do {				\
590	if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) {	\
591		TAILQ_REMOVE(&_thread_gc_list, thrd, gcle);	\
592		(thrd)->tlflags &= ~TLFLAGS_IN_GCLIST;		\
593		_gc_count--;					\
594	}							\
595} while (0)
596
597#define THR_REF_ADD(curthread, pthread) {			\
598	THR_CRITICAL_ENTER(curthread);				\
599	pthread->refcount++;					\
600} while (0)
601
602#define THR_REF_DEL(curthread, pthread) {			\
603	pthread->refcount--;					\
604	THR_CRITICAL_LEAVE(curthread);				\
605} while (0)
606
607#define GC_NEEDED()	(_gc_count >= 5)
608
609#define SHOULD_REPORT_EVENT(curthr, e)			\
610	(curthr->report_events && 			\
611	 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
612
613extern int __isthreaded;
614
615/*
616 * Global variables for the pthread kernel.
617 */
618
619extern char		*_usrstack __hidden;
620extern struct pthread	*_thr_initial __hidden;
621
622/* For debugger */
623extern int		_libthr_debug;
624extern int		_thread_event_mask;
625extern struct pthread	*_thread_last_event;
626
627/* List of all threads: */
628extern pthreadlist	_thread_list;
629
630/* List of threads needing GC: */
631extern pthreadlist	_thread_gc_list __hidden;
632
633extern int		_thread_active_threads;
634extern atfork_head	_thr_atfork_list __hidden;
635extern struct urwlock	_thr_atfork_lock __hidden;
636
637/* Default thread attributes: */
638extern struct pthread_attr _pthread_attr_default __hidden;
639
640/* Default mutex attributes: */
641extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
642extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden;
643
644/* Default condition variable attributes: */
645extern struct pthread_cond_attr _pthread_condattr_default __hidden;
646
647extern struct pthread_prio _thr_priorities[] __hidden;
648
649extern pid_t	_thr_pid __hidden;
650extern int	_thr_is_smp __hidden;
651
652extern size_t	_thr_guard_default __hidden;
653extern size_t	_thr_stack_default __hidden;
654extern size_t	_thr_stack_initial __hidden;
655extern int	_thr_page_size __hidden;
656extern int	_thr_spinloops __hidden;
657extern int	_thr_yieldloops __hidden;
658
659/* Garbage thread count. */
660extern int	_gc_count __hidden;
661
662extern struct umutex	_mutex_static_lock __hidden;
663extern struct umutex	_cond_static_lock __hidden;
664extern struct umutex	_rwlock_static_lock __hidden;
665extern struct umutex	_keytable_lock __hidden;
666extern struct urwlock	_thr_list_lock __hidden;
667extern struct umutex	_thr_event_lock __hidden;
668
669/*
670 * Function prototype definitions.
671 */
672__BEGIN_DECLS
673int	_thr_setthreaded(int) __hidden;
674int	_mutex_cv_lock(pthread_mutex_t *, int count) __hidden;
675int	_mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden;
676int	_mutex_reinit(pthread_mutex_t *) __hidden;
677void	_mutex_fork(struct pthread *curthread) __hidden;
678void	_libpthread_init(struct pthread *) __hidden;
679struct pthread *_thr_alloc(struct pthread *) __hidden;
680void	_thread_exit(const char *, int, const char *) __hidden __dead2;
681int	_thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
682void	_thr_ref_delete(struct pthread *, struct pthread *) __hidden;
683void	_thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
684int	_thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
685void	_thr_rtld_init(void) __hidden;
686void	_thr_rtld_fini(void) __hidden;
687void	_thr_rtld_postfork_child(void) __hidden;
688int	_thr_stack_alloc(struct pthread_attr *) __hidden;
689void	_thr_stack_free(struct pthread_attr *) __hidden;
690void	_thr_free(struct pthread *, struct pthread *) __hidden;
691void	_thr_gc(struct pthread *) __hidden;
692void    _thread_cleanupspecific(void) __hidden;
693void	_thread_printf(int, const char *, ...) __hidden;
694void	_thr_spinlock_init(void) __hidden;
695void	_thr_cancel_enter(struct pthread *) __hidden;
696void	_thr_cancel_enter2(struct pthread *, int) __hidden;
697void	_thr_cancel_leave(struct pthread *, int) __hidden;
698void	_thr_testcancel(struct pthread *) __hidden;
699void	_thr_signal_block(struct pthread *) __hidden;
700void	_thr_signal_unblock(struct pthread *) __hidden;
701void	_thr_signal_init(void) __hidden;
702void	_thr_signal_deinit(void) __hidden;
703int	_thr_send_sig(struct pthread *, int sig) __hidden;
704void	_thr_list_init(void) __hidden;
705void	_thr_hash_add(struct pthread *) __hidden;
706void	_thr_hash_remove(struct pthread *) __hidden;
707struct pthread *_thr_hash_find(struct pthread *) __hidden;
708void	_thr_link(struct pthread *, struct pthread *) __hidden;
709void	_thr_unlink(struct pthread *, struct pthread *) __hidden;
710void	_thr_assert_lock_level(void) __hidden __dead2;
711void	_thr_ast(struct pthread *) __hidden;
712void	_thr_once_init(void) __hidden;
713void	_thr_report_creation(struct pthread *curthread,
714	    struct pthread *newthread) __hidden;
715void	_thr_report_death(struct pthread *curthread) __hidden;
716int	_thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
717int	_thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
718void	_thr_signal_prefork(void) __hidden;
719void	_thr_signal_postfork(void) __hidden;
720void	_thr_signal_postfork_child(void) __hidden;
721void	_thr_try_gc(struct pthread *, struct pthread *) __hidden;
722int	_rtp_to_schedparam(const struct rtprio *rtp, int *policy,
723		struct sched_param *param) __hidden;
724int	_schedparam_to_rtp(int policy, const struct sched_param *param,
725		struct rtprio *rtp) __hidden;
726void	_thread_bp_create(void);
727void	_thread_bp_death(void);
728int	_sched_yield(void);
729
730void	_pthread_cleanup_push(void (*)(void *), void *);
731void	_pthread_cleanup_pop(int);
732void	_pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden;
733void	_pthread_cancel_enter(int maycancel);
734void 	_pthread_cancel_leave(int maycancel);
735
736/* #include <fcntl.h> */
737#ifdef  _SYS_FCNTL_H_
738int     __sys_fcntl(int, int, ...);
739int     __sys_open(const char *, int, ...);
740int     __sys_openat(int, const char *, int, ...);
741#endif
742
743/* #include <signal.h> */
744#ifdef _SIGNAL_H_
745int	__sys_kill(pid_t, int);
746int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);
747int     __sys_sigpending(sigset_t *);
748int     __sys_sigprocmask(int, const sigset_t *, sigset_t *);
749int     __sys_sigsuspend(const sigset_t *);
750int     __sys_sigreturn(const ucontext_t *);
751int     __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
752int	__sys_sigwait(const sigset_t *, int *);
753int	__sys_sigtimedwait(const sigset_t *, siginfo_t *,
754		const struct timespec *);
755int	__sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
756#endif
757
758/* #include <time.h> */
759#ifdef	_TIME_H_
760int	__sys_nanosleep(const struct timespec *, struct timespec *);
761#endif
762
763/* #include <sys/ucontext.h> */
764#ifdef _SYS_UCONTEXT_H_
765int	__sys_setcontext(const ucontext_t *ucp);
766int	__sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
767#endif
768
769/* #include <unistd.h> */
770#ifdef  _UNISTD_H_
771int     __sys_close(int);
772int	__sys_fork(void);
773pid_t	__sys_getpid(void);
774ssize_t __sys_read(int, void *, size_t);
775ssize_t __sys_write(int, const void *, size_t);
776void	__sys_exit(int);
777#endif
778
779int	_umtx_op_err(void *, int op, u_long, void *, void *) __hidden;
780
781static inline int
782_thr_isthreaded(void)
783{
784	return (__isthreaded != 0);
785}
786
787static inline int
788_thr_is_inited(void)
789{
790	return (_thr_initial != NULL);
791}
792
793static inline void
794_thr_check_init(void)
795{
796	if (_thr_initial == NULL)
797		_libpthread_init(NULL);
798}
799
800struct dl_phdr_info;
801void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
802void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
803void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
804
805__END_DECLS
806
807#endif  /* !_THR_PRIVATE_H */
808