thr_private.h revision 303709 
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: stable/10/lib/libthr/thread/thr_private.h 303709 2016-08-03 10:23:42Z kib $
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		SIGTHR
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
138#define PMUTEX_FLAG_TYPE_MASK	0x0ff
139#define PMUTEX_FLAG_PRIVATE	0x100
140#define PMUTEX_FLAG_DEFERED	0x200
141#define PMUTEX_TYPE(mtxflags)	((mtxflags) & PMUTEX_FLAG_TYPE_MASK)
142
143#define MAX_DEFER_WAITERS       50
144
145struct pthread_mutex {
146	/*
147	 * Lock for accesses to this structure.
148	 */
149	struct umutex			m_lock;
150	int				m_flags;
151	struct pthread			*m_owner;
152	int				m_count;
153	int				m_spinloops;
154	int				m_yieldloops;
155	/*
156	 * Link for all mutexes a thread currently owns.
157	 */
158	TAILQ_ENTRY(pthread_mutex)	m_qe;
159};
160
161struct pthread_mutex_attr {
162	enum pthread_mutextype	m_type;
163	int			m_protocol;
164	int			m_ceiling;
165};
166
167#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
168	{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
169
170struct pthread_cond {
171	__uint32_t	__has_user_waiters;
172	__uint32_t	__has_kern_waiters;
173	__uint32_t	__flags;
174	__uint32_t	__clock_id;
175};
176
177struct pthread_cond_attr {
178	int		c_pshared;
179	int		c_clockid;
180};
181
182struct pthread_barrier {
183	struct umutex		b_lock;
184	struct ucond		b_cv;
185	int64_t			b_cycle;
186	int			b_count;
187	int			b_waiters;
188	int			b_refcount;
189	int			b_destroying;
190};
191
192struct pthread_barrierattr {
193	int		pshared;
194};
195
196struct pthread_spinlock {
197	struct umutex	s_lock;
198};
199
200/*
201 * Flags for condition variables.
202 */
203#define COND_FLAGS_PRIVATE	0x01
204#define COND_FLAGS_INITED	0x02
205#define COND_FLAGS_BUSY		0x04
206
207/*
208 * Cleanup definitions.
209 */
210struct pthread_cleanup {
211	struct pthread_cleanup	*prev;
212	void			(*routine)(void *);
213	void			*routine_arg;
214	int			onheap;
215};
216
217#define	THR_CLEANUP_PUSH(td, func, arg) {		\
218	struct pthread_cleanup __cup;			\
219							\
220	__cup.routine = func;				\
221	__cup.routine_arg = arg;			\
222	__cup.onheap = 0;				\
223	__cup.prev = (td)->cleanup;			\
224	(td)->cleanup = &__cup;
225
226#define	THR_CLEANUP_POP(td, exec)			\
227	(td)->cleanup = __cup.prev;			\
228	if ((exec) != 0)				\
229		__cup.routine(__cup.routine_arg);	\
230}
231
232struct pthread_atfork {
233	TAILQ_ENTRY(pthread_atfork) qe;
234	void (*prepare)(void);
235	void (*parent)(void);
236	void (*child)(void);
237};
238
239struct pthread_attr {
240#define pthread_attr_start_copy	sched_policy
241	int	sched_policy;
242	int	sched_inherit;
243	int	prio;
244	int	suspend;
245#define	THR_STACK_USER		0x100	/* 0xFF reserved for <pthread.h> */
246	int	flags;
247	void	*stackaddr_attr;
248	size_t	stacksize_attr;
249	size_t	guardsize_attr;
250#define pthread_attr_end_copy	cpuset
251	cpuset_t	*cpuset;
252	size_t	cpusetsize;
253};
254
255struct wake_addr {
256	struct wake_addr *link;
257	unsigned int	value;
258	char		pad[12];
259};
260
261struct sleepqueue {
262	TAILQ_HEAD(, pthread)    sq_blocked;
263	SLIST_HEAD(, sleepqueue) sq_freeq;
264	LIST_ENTRY(sleepqueue)   sq_hash;
265	SLIST_ENTRY(sleepqueue)  sq_flink;
266	void			 *sq_wchan;
267	int			 sq_type;
268};
269
270/*
271 * Thread creation state attributes.
272 */
273#define THR_CREATE_RUNNING		0
274#define THR_CREATE_SUSPENDED		1
275
276/*
277 * Miscellaneous definitions.
278 */
279#define THR_STACK_DEFAULT		(sizeof(void *) / 4 * 1024 * 1024)
280
281/*
282 * Maximum size of initial thread's stack.  This perhaps deserves to be larger
283 * than the stacks of other threads, since many applications are likely to run
284 * almost entirely on this stack.
285 */
286#define THR_STACK_INITIAL		(THR_STACK_DEFAULT * 2)
287
288/*
289 * Define priorities returned by kernel.
290 */
291#define THR_MIN_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_min)
292#define THR_MAX_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_max)
293#define THR_DEF_PRIORITY		(_thr_priorities[SCHED_OTHER-1].pri_default)
294
295#define THR_MIN_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_min)
296#define THR_MAX_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_max)
297#define THR_DEF_RR_PRIORITY		(_thr_priorities[SCHED_RR-1].pri_default)
298
299/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
300#define THR_MIN_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO_1].pri_min)
301#define THR_MAX_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_max)
302#define THR_DEF_FIFO_PRIORITY		(_thr_priorities[SCHED_FIFO-1].pri_default)
303
304struct pthread_prio {
305	int	pri_min;
306	int	pri_max;
307	int	pri_default;
308};
309
310struct pthread_rwlockattr {
311	int		pshared;
312};
313
314struct pthread_rwlock {
315	struct urwlock 	lock;
316	struct pthread	*owner;
317};
318
319/*
320 * Thread states.
321 */
322enum pthread_state {
323	PS_RUNNING,
324	PS_DEAD
325};
326
327struct pthread_specific_elem {
328	const void	*data;
329	int		seqno;
330};
331
332struct pthread_key {
333	volatile int	allocated;
334	int		seqno;
335	void            (*destructor)(void *);
336};
337
338/*
339 * lwpid_t is 32bit but kernel thr API exports tid as long type
340 * in very earily date.
341 */
342#define TID(thread)	((uint32_t) ((thread)->tid))
343
344/*
345 * Thread structure.
346 */
347struct pthread {
348#define _pthread_startzero	tid
349	/* Kernel thread id. */
350	long			tid;
351#define	TID_TERMINATED		1
352
353	/*
354	 * Lock for accesses to this thread structure.
355	 */
356	struct umutex		lock;
357
358	/* Internal condition variable cycle number. */
359	uint32_t		cycle;
360
361	/* How many low level locks the thread held. */
362	int			locklevel;
363
364	/*
365	 * Set to non-zero when this thread has entered a critical
366	 * region.  We allow for recursive entries into critical regions.
367	 */
368	int			critical_count;
369
370	/* Signal blocked counter. */
371	int			sigblock;
372
373	/* Queue entry for list of all threads. */
374	TAILQ_ENTRY(pthread)	tle;	/* link for all threads in process */
375
376	/* Queue entry for GC lists. */
377	TAILQ_ENTRY(pthread)	gcle;
378
379	/* Hash queue entry. */
380	LIST_ENTRY(pthread)	hle;
381
382	/* Sleep queue entry */
383	TAILQ_ENTRY(pthread)    wle;
384
385	/* Threads reference count. */
386	int			refcount;
387
388	/*
389	 * Thread start routine, argument, stack pointer and thread
390	 * attributes.
391	 */
392	void			*(*start_routine)(void *);
393	void			*arg;
394	struct pthread_attr	attr;
395
396#define	SHOULD_CANCEL(thr)					\
397	((thr)->cancel_pending && (thr)->cancel_enable &&	\
398	 (thr)->no_cancel == 0)
399
400	/* Cancellation is enabled */
401	int			cancel_enable;
402
403	/* Cancellation request is pending */
404	int			cancel_pending;
405
406	/* Thread is at cancellation point */
407	int			cancel_point;
408
409	/* Cancellation is temporarily disabled */
410	int			no_cancel;
411
412	/* Asynchronouse cancellation is enabled */
413	int			cancel_async;
414
415	/* Cancellation is in progress */
416	int			cancelling;
417
418	/* Thread temporary signal mask. */
419	sigset_t		sigmask;
420
421	/* Thread should unblock SIGCANCEL. */
422	int			unblock_sigcancel;
423
424	/* In sigsuspend state */
425	int			in_sigsuspend;
426
427	/* deferred signal info	*/
428	siginfo_t		deferred_siginfo;
429
430	/* signal mask to restore. */
431	sigset_t		deferred_sigmask;
432
433	/* the sigaction should be used for deferred signal. */
434	struct sigaction	deferred_sigact;
435
436	/* deferred signal delivery is performed, do not reenter. */
437	int			deferred_run;
438
439	/* Force new thread to exit. */
440	int			force_exit;
441
442	/* Thread state: */
443	enum pthread_state 	state;
444
445	/*
446	 * Error variable used instead of errno. The function __error()
447	 * returns a pointer to this.
448	 */
449	int			error;
450
451	/*
452	 * The joiner is the thread that is joining to this thread.  The
453	 * join status keeps track of a join operation to another thread.
454	 */
455	struct pthread		*joiner;
456
457	/* Miscellaneous flags; only set with scheduling lock held. */
458	int			flags;
459#define THR_FLAGS_PRIVATE	0x0001
460#define	THR_FLAGS_NEED_SUSPEND	0x0002	/* thread should be suspended */
461#define	THR_FLAGS_SUSPENDED	0x0004	/* thread is suspended */
462#define	THR_FLAGS_DETACHED	0x0008	/* thread is detached */
463
464	/* Thread list flags; only set with thread list lock held. */
465	int			tlflags;
466#define	TLFLAGS_GC_SAFE		0x0001	/* thread safe for cleaning */
467#define	TLFLAGS_IN_TDLIST	0x0002	/* thread in all thread list */
468#define	TLFLAGS_IN_GCLIST	0x0004	/* thread in gc list */
469
470	/* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */
471	struct mutex_queue	mutexq;
472
473	/* Queue of all owned PRIO_PROTECT mutexes. */
474	struct mutex_queue	pp_mutexq;
475
476	void				*ret;
477	struct pthread_specific_elem	*specific;
478	int				specific_data_count;
479
480	/* Number rwlocks rdlocks held. */
481	int			rdlock_count;
482
483	/*
484	 * Current locks bitmap for rtld. */
485	int			rtld_bits;
486
487	/* Thread control block */
488	struct tcb		*tcb;
489
490	/* Cleanup handlers Link List */
491	struct pthread_cleanup	*cleanup;
492
493#ifdef _PTHREAD_FORCED_UNWIND
494	struct _Unwind_Exception	ex;
495	void			*unwind_stackend;
496	int			unwind_disabled;
497#endif
498
499	/*
500	 * Magic value to help recognize a valid thread structure
501	 * from an invalid one:
502	 */
503#define	THR_MAGIC		((u_int32_t) 0xd09ba115)
504	u_int32_t		magic;
505
506	/* Enable event reporting */
507	int			report_events;
508
509	/* Event mask */
510	int			event_mask;
511
512	/* Event */
513	td_event_msg_t		event_buf;
514
515	/* Wait channel */
516	void			*wchan;
517
518	/* Referenced mutex. */
519	struct pthread_mutex	*mutex_obj;
520
521	/* Thread will sleep. */
522	int			will_sleep;
523
524	/* Number of threads deferred. */
525	int			nwaiter_defer;
526
527	/* Deferred threads from pthread_cond_signal. */
528	unsigned int 		*defer_waiters[MAX_DEFER_WAITERS];
529#define _pthread_endzero	wake_addr
530
531	struct wake_addr	*wake_addr;
532#define WAKE_ADDR(td)           ((td)->wake_addr)
533
534	/* Sleep queue */
535	struct	sleepqueue	*sleepqueue;
536
537};
538
539#define THR_SHOULD_GC(thrd) 						\
540	((thrd)->refcount == 0 && (thrd)->state == PS_DEAD &&		\
541	 ((thrd)->flags & THR_FLAGS_DETACHED) != 0)
542
543#define	THR_IN_CRITICAL(thrd)				\
544	(((thrd)->locklevel > 0) ||			\
545	((thrd)->critical_count > 0))
546
547#define	THR_CRITICAL_ENTER(thrd)			\
548	(thrd)->critical_count++
549
550#define	THR_CRITICAL_LEAVE(thrd)			\
551	do {						\
552		(thrd)->critical_count--;		\
553		_thr_ast(thrd);				\
554	} while (0)
555
556#define THR_UMUTEX_TRYLOCK(thrd, lck)			\
557	_thr_umutex_trylock((lck), TID(thrd))
558
559#define	THR_UMUTEX_LOCK(thrd, lck)			\
560	_thr_umutex_lock((lck), TID(thrd))
561
562#define	THR_UMUTEX_TIMEDLOCK(thrd, lck, timo)		\
563	_thr_umutex_timedlock((lck), TID(thrd), (timo))
564
565#define	THR_UMUTEX_UNLOCK(thrd, lck)			\
566	_thr_umutex_unlock((lck), TID(thrd))
567
568#define	THR_LOCK_ACQUIRE(thrd, lck)			\
569do {							\
570	(thrd)->locklevel++;				\
571	_thr_umutex_lock(lck, TID(thrd));		\
572} while (0)
573
574#define	THR_LOCK_ACQUIRE_SPIN(thrd, lck)		\
575do {							\
576	(thrd)->locklevel++;				\
577	_thr_umutex_lock_spin(lck, TID(thrd));		\
578} while (0)
579
580#ifdef	_PTHREADS_INVARIANTS
581#define	THR_ASSERT_LOCKLEVEL(thrd)			\
582do {							\
583	if (__predict_false((thrd)->locklevel <= 0))	\
584		_thr_assert_lock_level();		\
585} while (0)
586#else
587#define THR_ASSERT_LOCKLEVEL(thrd)
588#endif
589
590#define	THR_LOCK_RELEASE(thrd, lck)			\
591do {							\
592	THR_ASSERT_LOCKLEVEL(thrd);			\
593	_thr_umutex_unlock((lck), TID(thrd));		\
594	(thrd)->locklevel--;				\
595	_thr_ast(thrd);					\
596} while (0)
597
598#define	THR_LOCK(curthrd)		THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
599#define	THR_UNLOCK(curthrd)		THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
600#define	THR_THREAD_LOCK(curthrd, thr)	THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
601#define	THR_THREAD_UNLOCK(curthrd, thr)	THR_LOCK_RELEASE(curthrd, &(thr)->lock)
602
603#define	THREAD_LIST_RDLOCK(curthrd)				\
604do {								\
605	(curthrd)->locklevel++;					\
606	_thr_rwl_rdlock(&_thr_list_lock);			\
607} while (0)
608
609#define	THREAD_LIST_WRLOCK(curthrd)				\
610do {								\
611	(curthrd)->locklevel++;					\
612	_thr_rwl_wrlock(&_thr_list_lock);			\
613} while (0)
614
615#define	THREAD_LIST_UNLOCK(curthrd)				\
616do {								\
617	_thr_rwl_unlock(&_thr_list_lock);			\
618	(curthrd)->locklevel--;					\
619	_thr_ast(curthrd);					\
620} while (0)
621
622/*
623 * Macros to insert/remove threads to the all thread list and
624 * the gc list.
625 */
626#define	THR_LIST_ADD(thrd) do {					\
627	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) {	\
628		TAILQ_INSERT_HEAD(&_thread_list, thrd, tle);	\
629		_thr_hash_add(thrd);				\
630		(thrd)->tlflags |= TLFLAGS_IN_TDLIST;		\
631	}							\
632} while (0)
633#define	THR_LIST_REMOVE(thrd) do {				\
634	if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) {	\
635		TAILQ_REMOVE(&_thread_list, thrd, tle);		\
636		_thr_hash_remove(thrd);				\
637		(thrd)->tlflags &= ~TLFLAGS_IN_TDLIST;		\
638	}							\
639} while (0)
640#define	THR_GCLIST_ADD(thrd) do {				\
641	if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) {	\
642		TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
643		(thrd)->tlflags |= TLFLAGS_IN_GCLIST;		\
644		_gc_count++;					\
645	}							\
646} while (0)
647#define	THR_GCLIST_REMOVE(thrd) do {				\
648	if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) {	\
649		TAILQ_REMOVE(&_thread_gc_list, thrd, gcle);	\
650		(thrd)->tlflags &= ~TLFLAGS_IN_GCLIST;		\
651		_gc_count--;					\
652	}							\
653} while (0)
654
655#define THR_REF_ADD(curthread, pthread) {			\
656	THR_CRITICAL_ENTER(curthread);				\
657	pthread->refcount++;					\
658} while (0)
659
660#define THR_REF_DEL(curthread, pthread) {			\
661	pthread->refcount--;					\
662	THR_CRITICAL_LEAVE(curthread);				\
663} while (0)
664
665#define GC_NEEDED()	(_gc_count >= 5)
666
667#define SHOULD_REPORT_EVENT(curthr, e)			\
668	(curthr->report_events && 			\
669	 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
670
671extern int __isthreaded;
672
673/*
674 * Global variables for the pthread kernel.
675 */
676
677extern char		*_usrstack __hidden;
678extern struct pthread	*_thr_initial __hidden;
679
680/* For debugger */
681extern int		_libthr_debug;
682extern int		_thread_event_mask;
683extern struct pthread	*_thread_last_event;
684
685/* List of all threads: */
686extern pthreadlist	_thread_list;
687
688/* List of threads needing GC: */
689extern pthreadlist	_thread_gc_list __hidden;
690
691extern int		_thread_active_threads;
692extern atfork_head	_thr_atfork_list __hidden;
693extern struct urwlock	_thr_atfork_lock __hidden;
694
695/* Default thread attributes: */
696extern struct pthread_attr _pthread_attr_default __hidden;
697
698/* Default mutex attributes: */
699extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
700extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden;
701
702/* Default condition variable attributes: */
703extern struct pthread_cond_attr _pthread_condattr_default __hidden;
704
705extern struct pthread_prio _thr_priorities[] __hidden;
706
707extern int	_thr_is_smp __hidden;
708
709extern size_t	_thr_guard_default __hidden;
710extern size_t	_thr_stack_default __hidden;
711extern size_t	_thr_stack_initial __hidden;
712extern int	_thr_page_size __hidden;
713extern int	_thr_spinloops __hidden;
714extern int	_thr_yieldloops __hidden;
715extern int	_thr_queuefifo __hidden;
716
717/* Garbage thread count. */
718extern int	_gc_count __hidden;
719
720extern struct umutex	_mutex_static_lock __hidden;
721extern struct umutex	_cond_static_lock __hidden;
722extern struct umutex	_rwlock_static_lock __hidden;
723extern struct umutex	_keytable_lock __hidden;
724extern struct urwlock	_thr_list_lock __hidden;
725extern struct umutex	_thr_event_lock __hidden;
726extern struct umutex	_suspend_all_lock __hidden;
727extern int		_suspend_all_waiters __hidden;
728extern int		_suspend_all_cycle __hidden;
729extern struct pthread	*_single_thread __hidden;
730
731/*
732 * Function prototype definitions.
733 */
734__BEGIN_DECLS
735int	_thr_setthreaded(int) __hidden;
736int	_mutex_cv_lock(struct pthread_mutex *, int) __hidden;
737int	_mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden;
738int     _mutex_cv_attach(struct pthread_mutex *, int) __hidden;
739int     _mutex_cv_detach(struct pthread_mutex *, int *) __hidden;
740int     _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden;
741int	_mutex_reinit(pthread_mutex_t *) __hidden;
742void	_mutex_fork(struct pthread *curthread) __hidden;
743void	_libpthread_init(struct pthread *) __hidden;
744struct pthread *_thr_alloc(struct pthread *) __hidden;
745void	_thread_exit(const char *, int, const char *) __hidden __dead2;
746int	_thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
747void	_thr_ref_delete(struct pthread *, struct pthread *) __hidden;
748void	_thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
749int	_thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
750void	_thr_rtld_init(void) __hidden;
751void	_thr_rtld_postfork_child(void) __hidden;
752int	_thr_stack_alloc(struct pthread_attr *) __hidden;
753void	_thr_stack_free(struct pthread_attr *) __hidden;
754void	_thr_free(struct pthread *, struct pthread *) __hidden;
755void	_thr_gc(struct pthread *) __hidden;
756void    _thread_cleanupspecific(void) __hidden;
757void	_thread_printf(int, const char *, ...) __hidden;
758void	_thr_spinlock_init(void) __hidden;
759void	_thr_cancel_enter(struct pthread *) __hidden;
760void	_thr_cancel_enter2(struct pthread *, int) __hidden;
761void	_thr_cancel_leave(struct pthread *, int) __hidden;
762void	_thr_testcancel(struct pthread *) __hidden;
763void	_thr_signal_block(struct pthread *) __hidden;
764void	_thr_signal_unblock(struct pthread *) __hidden;
765void	_thr_signal_init(int) __hidden;
766void	_thr_signal_deinit(void) __hidden;
767int	_thr_send_sig(struct pthread *, int sig) __hidden;
768void	_thr_list_init(void) __hidden;
769void	_thr_hash_add(struct pthread *) __hidden;
770void	_thr_hash_remove(struct pthread *) __hidden;
771struct pthread *_thr_hash_find(struct pthread *) __hidden;
772void	_thr_link(struct pthread *, struct pthread *) __hidden;
773void	_thr_unlink(struct pthread *, struct pthread *) __hidden;
774void	_thr_assert_lock_level(void) __hidden __dead2;
775void	_thr_ast(struct pthread *) __hidden;
776void	_thr_report_creation(struct pthread *curthread,
777	    struct pthread *newthread) __hidden;
778void	_thr_report_death(struct pthread *curthread) __hidden;
779int	_thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
780int	_thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
781void	_thr_signal_prefork(void) __hidden;
782void	_thr_signal_postfork(void) __hidden;
783void	_thr_signal_postfork_child(void) __hidden;
784void	_thr_suspend_all_lock(struct pthread *) __hidden;
785void	_thr_suspend_all_unlock(struct pthread *) __hidden;
786void	_thr_try_gc(struct pthread *, struct pthread *) __hidden;
787int	_rtp_to_schedparam(const struct rtprio *rtp, int *policy,
788		struct sched_param *param) __hidden;
789int	_schedparam_to_rtp(int policy, const struct sched_param *param,
790		struct rtprio *rtp) __hidden;
791void	_thread_bp_create(void);
792void	_thread_bp_death(void);
793int	_sched_yield(void);
794
795void	_pthread_cleanup_push(void (*)(void *), void *);
796void	_pthread_cleanup_pop(int);
797void	_pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden;
798void	_pthread_cancel_enter(int maycancel);
799void 	_pthread_cancel_leave(int maycancel);
800
801/* #include <fcntl.h> */
802#ifdef  _SYS_FCNTL_H_
803int     __sys_fcntl(int, int, ...);
804int     __sys_open(const char *, int, ...);
805int     __sys_openat(int, const char *, int, ...);
806#endif
807
808/* #include <signal.h> */
809#ifdef _SIGNAL_H_
810int	__sys_kill(pid_t, int);
811int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);
812int     __sys_sigpending(sigset_t *);
813int     __sys_sigprocmask(int, const sigset_t *, sigset_t *);
814int     __sys_sigsuspend(const sigset_t *);
815int     __sys_sigreturn(const ucontext_t *);
816int     __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
817int	__sys_sigwait(const sigset_t *, int *);
818int	__sys_sigtimedwait(const sigset_t *, siginfo_t *,
819		const struct timespec *);
820int	__sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
821#endif
822
823/* #include <time.h> */
824#ifdef	_TIME_H_
825int	__sys_nanosleep(const struct timespec *, struct timespec *);
826#endif
827
828/* #include <sys/ucontext.h> */
829#ifdef _SYS_UCONTEXT_H_
830int	__sys_setcontext(const ucontext_t *ucp);
831int	__sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
832#endif
833
834/* #include <unistd.h> */
835#ifdef  _UNISTD_H_
836int     __sys_close(int);
837int	__sys_fork(void);
838pid_t	__sys_getpid(void);
839ssize_t __sys_read(int, void *, size_t);
840void	__sys_exit(int);
841#endif
842
843static inline int
844_thr_isthreaded(void)
845{
846	return (__isthreaded != 0);
847}
848
849static inline int
850_thr_is_inited(void)
851{
852	return (_thr_initial != NULL);
853}
854
855static inline void
856_thr_check_init(void)
857{
858	if (_thr_initial == NULL)
859		_libpthread_init(NULL);
860}
861
862struct wake_addr *_thr_alloc_wake_addr(void);
863void	_thr_release_wake_addr(struct wake_addr *);
864int	_thr_sleep(struct pthread *, int, const struct timespec *);
865
866void _thr_wake_addr_init(void) __hidden;
867
868static inline void
869_thr_clear_wake(struct pthread *td)
870{
871	td->wake_addr->value = 0;
872}
873
874static inline int
875_thr_is_woken(struct pthread *td)
876{
877	return td->wake_addr->value != 0;
878}
879
880static inline void
881_thr_set_wake(unsigned int *waddr)
882{
883	*waddr = 1;
884	_thr_umtx_wake(waddr, INT_MAX, 0);
885}
886
887void _thr_wake_all(unsigned int *waddrs[], int) __hidden;
888
889static inline struct pthread *
890_sleepq_first(struct sleepqueue *sq)
891{
892	return TAILQ_FIRST(&sq->sq_blocked);
893}
894
895void	_sleepq_init(void) __hidden;
896struct sleepqueue *_sleepq_alloc(void) __hidden;
897void	_sleepq_free(struct sleepqueue *) __hidden;
898void	_sleepq_lock(void *) __hidden;
899void	_sleepq_unlock(void *) __hidden;
900struct sleepqueue *_sleepq_lookup(void *) __hidden;
901void	_sleepq_add(void *, struct pthread *) __hidden;
902int	_sleepq_remove(struct sleepqueue *, struct pthread *) __hidden;
903void	_sleepq_drop(struct sleepqueue *,
904		void (*cb)(struct pthread *, void *arg), void *) __hidden;
905
906int	_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
907	    void *(calloc_cb)(size_t, size_t));
908
909struct dl_phdr_info;
910void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
911void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
912void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
913void _thr_stack_fix_protection(struct pthread *thrd);
914
915int *__error_threaded(void) __hidden;
916void __thr_interpose_libc(void) __hidden;
917pid_t __thr_fork(void);
918int __thr_setcontext(const ucontext_t *ucp);
919int __thr_sigaction(int sig, const struct sigaction *act,
920    struct sigaction *oact) __hidden;
921int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset);
922int __thr_sigsuspend(const sigset_t * set);
923int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info,
924    const struct timespec * timeout);
925int __thr_sigwait(const sigset_t *set, int *sig);
926int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info);
927int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
928
929void __thr_map_stacks_exec(void);
930
931struct _spinlock;
932void __thr_spinunlock(struct _spinlock *lck);
933void __thr_spinlock(struct _spinlock *lck);
934
935__END_DECLS
936
937#endif  /* !_THR_PRIVATE_H */
938