Make thread suspension really work.
[dragonfly.git] / lib / libthread_xu / thread / thr_private.h
CommitLineData
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1/*
2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by John Birrell.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * Private thread definitions for the uthread kernel.
33 *
34 * $FreeBSD: src/lib/libpthread/thread/thr_private.h,v 1.120 2004/11/01 10:49:34 davidxu Exp $
fd4288bd 35 * $DragonFly: src/lib/libthread_xu/thread/thr_private.h,v 1.9 2006/03/19 13:07:12 davidxu Exp $
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36 */
37
38#ifndef _THR_PRIVATE_H
39#define _THR_PRIVATE_H
40
41/*
42 * Include files.
43 */
44#include <sys/types.h>
45#include <sys/time.h>
46#include <sys/cdefs.h>
47#include <sys/queue.h>
48#include <machine/atomic.h>
49#include <errno.h>
50#include <limits.h>
51#include <signal.h>
52#include <stdio.h>
53#include <sched.h>
54#include <unistd.h>
55#include <pthread.h>
56#include <pthread_np.h>
57
58#include "pthread_md.h"
59#include "thr_umtx.h"
3cd47da3 60#include "thread_db.h"
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61
62/*
63 * Evaluate the storage class specifier.
64 */
65#ifdef GLOBAL_PTHREAD_PRIVATE
66#define SCLASS
67#define SCLASS_PRESET(x...) = x
68#else
69#define SCLASS extern
70#define SCLASS_PRESET(x...)
71#endif
72
73/* Signal to do cancellation */
74#define SIGCANCEL 32
75
76/*
77 * Kernel fatal error handler macro.
78 */
79#define PANIC(string) _thread_exit(__FILE__,__LINE__,string)
80
81/* Output debug messages like this: */
82#define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
83#define stderr_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
84
85#ifdef __DragonFly__
86#define __predict_true(exp) (exp)
87#define __predict_false(exp) (exp)
88#endif
89
90#ifdef _PTHREADS_INVARIANTS
91#define THR_ASSERT(cond, msg) do { \
92 if (__predict_false(!(cond))) \
93 PANIC(msg); \
94} while (0)
95#else
96#define THR_ASSERT(cond, msg)
97#endif
98
99#define TIMESPEC_ADD(dst, src, val) \
100 do { \
101 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \
102 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
9d8e0254 103 if ((dst)->tv_nsec >= 1000000000) { \
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104 (dst)->tv_sec++; \
105 (dst)->tv_nsec -= 1000000000; \
106 } \
107 } while (0)
108
109#define TIMESPEC_SUB(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 < 0) { \
114 (dst)->tv_sec--; \
115 (dst)->tv_nsec += 1000000000; \
116 } \
117 } while (0)
118
119struct pthread_mutex {
120 /*
121 * Lock for accesses to this structure.
122 */
123 volatile umtx_t m_lock;
124 enum pthread_mutextype m_type;
125 int m_protocol;
126 TAILQ_HEAD(mutex_head, pthread) m_queue;
127 struct pthread *m_owner;
128 long m_flags;
129 int m_count;
130 int m_refcount;
131
132 /*
133 * Used for priority inheritence and protection.
134 *
135 * m_prio - For priority inheritence, the highest active
136 * priority (threads locking the mutex inherit
137 * this priority). For priority protection, the
138 * ceiling priority of this mutex.
139 * m_saved_prio - mutex owners inherited priority before
140 * taking the mutex, restored when the owner
141 * unlocks the mutex.
142 */
143 int m_prio;
144 int m_saved_prio;
145
146 /*
147 * Link for list of all mutexes a thread currently owns.
148 */
149 TAILQ_ENTRY(pthread_mutex) m_qe;
150};
151
152#define TAILQ_INITIALIZER { NULL, NULL }
153
154#define PTHREAD_MUTEX_STATIC_INITIALIZER \
155 {0, PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, TAILQ_INITIALIZER, \
156 NULL, { NULL }, MUTEX_FLAGS_PRIVATE, 0, 0, 0, TAILQ_INITIALIZER }
157/*
158 * Flags for mutexes.
159 */
160#define MUTEX_FLAGS_PRIVATE 0x01
161#define MUTEX_FLAGS_INITED 0x02
162#define MUTEX_FLAGS_BUSY 0x04
163
164struct pthread_mutex_attr {
165 enum pthread_mutextype m_type;
166 int m_protocol;
167 int m_ceiling;
168 long m_flags;
169};
170
171#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
172 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
173
174struct pthread_cond {
175 /*
176 * Lock for accesses to this structure.
177 */
178 volatile umtx_t c_lock;
179 volatile umtx_t c_seqno;
180 volatile int c_waiters;
181 volatile int c_wakeups;
182 int c_pshared;
183 int c_clockid;
184};
185
186struct pthread_cond_attr {
187 int c_pshared;
188 int c_clockid;
189};
190
191struct pthread_barrier {
192 volatile umtx_t b_lock;
193 volatile umtx_t b_cycle;
194 volatile int b_count;
195 volatile int b_waiters;
196};
197
198struct pthread_barrierattr {
199 int pshared;
200};
201
202struct pthread_spinlock {
203 volatile umtx_t s_lock;
204};
205
206/*
207 * Flags for condition variables.
208 */
209#define COND_FLAGS_PRIVATE 0x01
210#define COND_FLAGS_INITED 0x02
211#define COND_FLAGS_BUSY 0x04
212
213/*
214 * Cleanup definitions.
215 */
216struct pthread_cleanup {
217 struct pthread_cleanup *next;
218 void (*routine)();
219 void *routine_arg;
220 int onstack;
221};
222
223#define THR_CLEANUP_PUSH(td, func, arg) { \
224 struct pthread_cleanup __cup; \
225 \
226 __cup.routine = func; \
227 __cup.routine_arg = arg; \
228 __cup.onstack = 1; \
229 __cup.next = (td)->cleanup; \
230 (td)->cleanup = &__cup;
231
232#define THR_CLEANUP_POP(td, exec) \
233 (td)->cleanup = __cup.next; \
234 if ((exec) != 0) \
235 __cup.routine(__cup.routine_arg); \
236}
237
238struct pthread_atfork {
239 TAILQ_ENTRY(pthread_atfork) qe;
240 void (*prepare)(void);
241 void (*parent)(void);
242 void (*child)(void);
243};
244
245struct pthread_attr {
246 int sched_policy;
247 int sched_inherit;
248 int sched_interval;
249 int prio;
250 int suspend;
251#define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */
252 int flags;
253 void *arg_attr;
254 void (*cleanup_attr)();
255 void *stackaddr_attr;
256 size_t stacksize_attr;
257 size_t guardsize_attr;
258};
259
260/*
261 * Thread creation state attributes.
262 */
263#define THR_CREATE_RUNNING 0
264#define THR_CREATE_SUSPENDED 1
265
266/*
267 * Miscellaneous definitions.
268 */
eddabc99 269#define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024)
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270
271/*
272 * Maximum size of initial thread's stack. This perhaps deserves to be larger
273 * than the stacks of other threads, since many applications are likely to run
274 * almost entirely on this stack.
275 */
eddabc99 276#define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2)
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277
278/*
279 * Define the different priority ranges. All applications have thread
280 * priorities constrained within 0-31. The threads library raises the
281 * priority when delivering signals in order to ensure that signal
282 * delivery happens (from the POSIX spec) "as soon as possible".
283 * In the future, the threads library will also be able to map specific
284 * threads into real-time (cooperating) processes or kernel threads.
285 * The RT and SIGNAL priorities will be used internally and added to
286 * thread base priorities so that the scheduling queue can handle both
287 * normal and RT priority threads with and without signal handling.
288 *
289 * The approach taken is that, within each class, signal delivery
290 * always has priority over thread execution.
291 */
292#define THR_DEFAULT_PRIORITY 15
293#define THR_MIN_PRIORITY 0
294#define THR_MAX_PRIORITY 31 /* 0x1F */
295#define THR_SIGNAL_PRIORITY 32 /* 0x20 */
296#define THR_RT_PRIORITY 64 /* 0x40 */
297#define THR_FIRST_PRIORITY THR_MIN_PRIORITY
298#define THR_LAST_PRIORITY \
299 (THR_MAX_PRIORITY + THR_SIGNAL_PRIORITY + THR_RT_PRIORITY)
300#define THR_BASE_PRIORITY(prio) ((prio) & THR_MAX_PRIORITY)
301
302/*
303 * Time slice period in microseconds.
304 */
305#define TIMESLICE_USEC 20000
306
307struct pthread_rwlockattr {
308 int pshared;
309};
310
311struct pthread_rwlock {
312 pthread_mutex_t lock; /* monitor lock */
313 pthread_cond_t read_signal;
314 pthread_cond_t write_signal;
315 int state; /* 0 = idle >0 = # of readers -1 = writer */
316 int blocked_writers;
317};
318
319/*
320 * Thread states.
321 */
322enum pthread_state {
323 PS_RUNNING,
324 PS_DEAD
325};
326
327union pthread_wait_data {
328 pthread_mutex_t mutex;
329};
330
331struct pthread_specific_elem {
332 const void *data;
333 int seqno;
334};
335
336struct pthread_key {
337 volatile int allocated;
338 volatile int count;
339 int seqno;
340 void (*destructor)(void *);
341};
342
343/*
344 * Thread structure.
345 */
346struct pthread {
347 /*
348 * Magic value to help recognize a valid thread structure
349 * from an invalid one:
350 */
351#define THR_MAGIC ((u_int32_t) 0xd09ba115)
352 u_int32_t magic;
353 char *name;
354 u_int64_t uniqueid; /* for gdb */
355
356 /*
357 * Lock for accesses to this thread structure.
358 */
359 umtx_t lock;
360
361 /* Thread is terminated in kernel, written by kernel. */
362 long terminated;
363
364 /* Kernel thread id. */
365 long tid;
366
367 /* Internal condition variable cycle number. */
368 umtx_t cycle;
369
370 /* How many low level locks the thread held. */
371 int locklevel;
372
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373 /*
374 * Set to non-zero when this thread has entered a critical
375 * region. We allow for recursive entries into critical regions.
376 */
377 int critical_count;
378
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379 /* Signal blocked counter. */
380 int sigblock;
381
382 /* Queue entry for list of all threads. */
383 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */
384
385 /* Queue entry for GC lists. */
386 TAILQ_ENTRY(pthread) gcle;
387
388 /* Hash queue entry. */
389 LIST_ENTRY(pthread) hle;
390
391 /* Threads reference count. */
392 int refcount;
393
394 /*
395 * Thread start routine, argument, stack pointer and thread
396 * attributes.
397 */
398 void *(*start_routine)(void *);
399 void *arg;
400 struct pthread_attr attr;
401
402 /*
403 * Cancelability flags
404 */
405#define THR_CANCEL_DISABLE 0x0001
406#define THR_CANCEL_EXITING 0x0002
407#define THR_CANCEL_AT_POINT 0x0004
408#define THR_CANCEL_NEEDED 0x0008
409#define SHOULD_CANCEL(val) \
410 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \
411 THR_CANCEL_NEEDED)) == THR_CANCEL_NEEDED)
412
413#define SHOULD_ASYNC_CANCEL(val) \
414 (((val) & (THR_CANCEL_DISABLE | THR_CANCEL_EXITING | \
415 THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT)) == \
416 (THR_CANCEL_NEEDED | THR_CANCEL_AT_POINT))
417 int cancelflags;
418
419 /* Thread temporary signal mask. */
420 sigset_t sigmask;
421
422 /* Thread state: */
423 umtx_t state;
424
425 /*
67837f3a 426 * Error variable used instead of errno, used for internal.
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427 */
428 int error;
429
430 /*
431 * The joiner is the thread that is joining to this thread. The
432 * join status keeps track of a join operation to another thread.
433 */
434 struct pthread *joiner;
435
436 /*
437 * The current thread can belong to a priority mutex queue.
438 * This is the synchronization queue link.
439 */
440 TAILQ_ENTRY(pthread) sqe;
441
442 /* Wait data. */
443 union pthread_wait_data data;
444
445 int sflags;
446#define THR_FLAGS_IN_SYNCQ 0x0001
447
448 /* Miscellaneous flags; only set with scheduling lock held. */
449 int flags;
450#define THR_FLAGS_PRIVATE 0x0001
451#define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */
452#define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */
453
454 /* Thread list flags; only set with thread list lock held. */
455 int tlflags;
456#define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */
457#define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */
458#define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */
459#define TLFLAGS_DETACHED 0x0008 /* thread is detached */
460
461 /*
462 * Base priority is the user setable and retrievable priority
463 * of the thread. It is only affected by explicit calls to
464 * set thread priority and upon thread creation via a thread
465 * attribute or default priority.
466 */
467 char base_priority;
468
469 /*
470 * Inherited priority is the priority a thread inherits by
471 * taking a priority inheritence or protection mutex. It
472 * is not affected by base priority changes. Inherited
473 * priority defaults to and remains 0 until a mutex is taken
474 * that is being waited on by any other thread whose priority
475 * is non-zero.
476 */
477 char inherited_priority;
478
479 /*
480 * Active priority is always the maximum of the threads base
481 * priority and inherited priority. When there is a change
482 * in either the base or inherited priority, the active
483 * priority must be recalculated.
484 */
485 char active_priority;
486
487 /* Number of priority ceiling or protection mutexes owned. */
488 int priority_mutex_count;
489
490 /* Queue of currently owned simple type mutexes. */
491 TAILQ_HEAD(, pthread_mutex) mutexq;
492
493 /* Queue of currently owned priority type mutexs. */
494 TAILQ_HEAD(, pthread_mutex) pri_mutexq;
495
496 void *ret;
497 struct pthread_specific_elem *specific;
498 int specific_data_count;
499
500 /* Number rwlocks rdlocks held. */
501 int rdlock_count;
502
503 /*
504 * Current locks bitmap for rtld. */
505 int rtld_bits;
506
507 /* Thread control block */
9e2ee207 508 struct tls_tcb *tcb;
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509
510 /* Cleanup handlers Link List */
511 struct pthread_cleanup *cleanup;
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512
513 /* Enable event reporting */
514 int report_events;
515
516 /* Event mask */
517 td_thr_events_t event_mask;
518
519 /* Event */
520 td_event_msg_t event_buf;
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521};
522
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523#define THR_IN_CRITICAL(thrd) \
524 (((thrd)->locklevel > 0) || \
525 ((thrd)->critical_count > 0))
526
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527#define THR_UMTX_TRYLOCK(thrd, lck) \
528 _thr_umtx_trylock((lck), (thrd)->tid)
529
530#define THR_UMTX_LOCK(thrd, lck) \
531 _thr_umtx_lock((lck), (thrd)->tid)
532
533#define THR_UMTX_TIMEDLOCK(thrd, lck, timo) \
534 _thr_umtx_timedlock((lck), (thrd)->tid, (timo))
535
536#define THR_UMTX_UNLOCK(thrd, lck) \
537 _thr_umtx_unlock((lck), (thrd)->tid)
538
539#define THR_LOCK_ACQUIRE(thrd, lck) \
540do { \
541 (thrd)->locklevel++; \
542 _thr_umtx_lock(lck, (thrd)->tid); \
543} while (0)
544
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545#ifdef _PTHREADS_INVARIANTS
546#define THR_ASSERT_LOCKLEVEL(thrd) \
71b3fa15 547do { \
fd4288bd 548 if (__predict_false((thrd)->locklevel <= 0)) \
71b3fa15 549 _thr_assert_lock_level(); \
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550} while (0)
551#else
552#define THR_ASSERT_LOCKLEVEL(thrd)
553#endif
554
555#define THR_LOCK_RELEASE(thrd, lck) \
556do { \
557 THR_ASSERT_LOCKLEVEL(thrd); \
558 _thr_umtx_unlock((lck), (thrd)->tid); \
559 (thrd)->locklevel--; \
560 _thr_ast(thrd); \
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561} while (0)
562
563#define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
564#define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
565#define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
566#define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
567
568#define THREAD_LIST_LOCK(curthrd) \
569do { \
570 THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \
571} while (0)
572
573#define THREAD_LIST_UNLOCK(curthrd) \
574do { \
575 THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \
576} while (0)
577
578/*
579 * Macros to insert/remove threads to the all thread list and
580 * the gc list.
581 */
582#define THR_LIST_ADD(thrd) do { \
583 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \
584 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
585 _thr_hash_add(thrd); \
586 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \
587 } \
588} while (0)
589#define THR_LIST_REMOVE(thrd) do { \
590 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \
591 TAILQ_REMOVE(&_thread_list, thrd, tle); \
592 _thr_hash_remove(thrd); \
593 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \
594 } \
595} while (0)
596#define THR_GCLIST_ADD(thrd) do { \
597 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \
598 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
599 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \
600 _gc_count++; \
601 } \
602} while (0)
603#define THR_GCLIST_REMOVE(thrd) do { \
604 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \
605 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \
606 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \
607 _gc_count--; \
608 } \
609} while (0)
610
611#define GC_NEEDED() (_gc_count >= 5)
612
613#define THR_IN_SYNCQ(thrd) (((thrd)->sflags & THR_FLAGS_IN_SYNCQ) != 0)
614
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615#define SHOULD_REPORT_EVENT(curthr, e) \
616 (curthr->report_events && \
617 (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
618
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619extern int __isthreaded;
620
621/*
622 * Global variables for the pthread kernel.
623 */
624
625SCLASS void *_usrstack SCLASS_PRESET(NULL);
626SCLASS struct pthread *_thr_initial SCLASS_PRESET(NULL);
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627SCLASS int _thread_scope_system SCLASS_PRESET(0);
628
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629/* For debugger */
630SCLASS int _libthread_xu_debug SCLASS_PRESET(0);
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631SCLASS int _thread_event_mask SCLASS_PRESET(0);
632SCLASS struct pthread *_thread_last_event;
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633
634/* List of all threads: */
635SCLASS TAILQ_HEAD(, pthread) _thread_list
636 SCLASS_PRESET(TAILQ_HEAD_INITIALIZER(_thread_list));
637
638/* List of threads needing GC: */
639SCLASS TAILQ_HEAD(, pthread) _thread_gc_list
640 SCLASS_PRESET(TAILQ_HEAD_INITIALIZER(_thread_gc_list));
641
642SCLASS int _thread_active_threads SCLASS_PRESET(1);
643
644SCLASS TAILQ_HEAD(atfork_head, pthread_atfork) _thr_atfork_list;
645SCLASS umtx_t _thr_atfork_lock;
646
647/* Default thread attributes: */
648SCLASS struct pthread_attr _pthread_attr_default
649 SCLASS_PRESET({
650 .sched_policy = SCHED_RR,
651 .sched_inherit = 0,
652 .sched_interval = TIMESLICE_USEC,
653 .prio = THR_DEFAULT_PRIORITY,
654 .suspend = THR_CREATE_RUNNING,
655 .flags = 0,
656 .arg_attr = NULL,
657 .cleanup_attr = NULL,
658 .stackaddr_attr = NULL,
659 .stacksize_attr = THR_STACK_DEFAULT,
660 .guardsize_attr = 0
661 });
662
663/* Default mutex attributes: */
664SCLASS struct pthread_mutex_attr _pthread_mutexattr_default
665 SCLASS_PRESET({
666 .m_type = PTHREAD_MUTEX_DEFAULT,
667 .m_protocol = PTHREAD_PRIO_NONE,
668 .m_ceiling = 0,
669 .m_flags = 0
670 });
671
672/* Default condition variable attributes: */
673SCLASS struct pthread_cond_attr _pthread_condattr_default
674 SCLASS_PRESET({
675 .c_pshared = PTHREAD_PROCESS_PRIVATE,
676 .c_clockid = CLOCK_REALTIME
677 });
678
679SCLASS pid_t _thr_pid SCLASS_PRESET(0);
680SCLASS int _thr_guard_default;
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681SCLASS int _thr_stack_default SCLASS_PRESET(THR_STACK_DEFAULT);
682SCLASS int _thr_stack_initial SCLASS_PRESET(THR_STACK_INITIAL);
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683SCLASS int _thr_page_size;
684/* Garbage thread count. */
685SCLASS int _gc_count SCLASS_PRESET(0);
686
687SCLASS umtx_t _mutex_static_lock;
688SCLASS umtx_t _cond_static_lock;
689SCLASS umtx_t _rwlock_static_lock;
690SCLASS umtx_t _keytable_lock;
691SCLASS umtx_t _thr_list_lock;
3cd47da3 692SCLASS umtx_t _thr_event_lock;
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693
694/* Undefine the storage class and preset specifiers: */
695#undef SCLASS
696#undef SCLASS_PRESET
697
698/*
699 * Function prototype definitions.
700 */
701__BEGIN_DECLS
702int _thr_setthreaded(int);
703int _mutex_cv_lock(pthread_mutex_t *);
704int _mutex_cv_unlock(pthread_mutex_t *);
705void _mutex_notify_priochange(struct pthread *, struct pthread *, int);
706int _mutex_reinit(pthread_mutex_t *);
707void _mutex_fork(struct pthread *curthread);
708void _mutex_unlock_private(struct pthread *);
709void _libpthread_init(struct pthread *);
710void *_pthread_getspecific(pthread_key_t);
711int _pthread_cond_init(pthread_cond_t *, const pthread_condattr_t *);
712int _pthread_cond_destroy(pthread_cond_t *);
713int _pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *);
714int _pthread_cond_timedwait(pthread_cond_t *, pthread_mutex_t *,
715 const struct timespec *);
716int _pthread_cond_signal(pthread_cond_t *);
717int _pthread_cond_broadcast(pthread_cond_t *);
718int _pthread_key_create(pthread_key_t *, void (*) (void *));
719int _pthread_key_delete(pthread_key_t);
720int _pthread_mutex_destroy(pthread_mutex_t *);
721int _pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *);
722int _pthread_mutex_lock(pthread_mutex_t *);
723int _pthread_mutex_trylock(pthread_mutex_t *);
724int _pthread_mutex_unlock(pthread_mutex_t *);
725int _pthread_mutexattr_init(pthread_mutexattr_t *);
726int _pthread_mutexattr_destroy(pthread_mutexattr_t *);
727int _pthread_mutexattr_settype(pthread_mutexattr_t *, int);
728int _pthread_once(pthread_once_t *, void (*) (void));
729int _pthread_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *);
730int _pthread_rwlock_destroy (pthread_rwlock_t *);
731struct pthread *_pthread_self(void);
732int _pthread_setspecific(pthread_key_t, const void *);
733void _pthread_testcancel(void);
734void _pthread_yield(void);
735void _pthread_cleanup_push(void (*routine) (void *), void *routine_arg);
736void _pthread_cleanup_pop(int execute);
737struct pthread *_thr_alloc(struct pthread *);
738void _thread_exit(char *, int, char *) __dead2;
739void _thr_exit_cleanup(void);
740int _thr_ref_add(struct pthread *, struct pthread *, int);
741void _thr_ref_delete(struct pthread *, struct pthread *);
c9ad2203 742void _thr_ref_delete_unlocked(struct pthread *, struct pthread *);
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743int _thr_find_thread(struct pthread *, struct pthread *, int);
744void _thr_rtld_init(void);
745void _thr_rtld_fini(void);
746int _thr_stack_alloc(struct pthread_attr *);
747void _thr_stack_free(struct pthread_attr *);
748void _thr_free(struct pthread *, struct pthread *);
749void _thr_gc(struct pthread *);
750void _thread_cleanupspecific(void);
751void _thread_dump_info(void);
752void _thread_printf(int, const char *, ...);
753void _thr_spinlock_init(void);
754int _thr_cancel_enter(struct pthread *);
755void _thr_cancel_leave(struct pthread *, int);
756void _thr_signal_block(struct pthread *);
757void _thr_signal_unblock(struct pthread *);
758void _thr_signal_init(void);
759void _thr_signal_deinit(void);
760int _thr_send_sig(struct pthread *, int sig);
761void _thr_list_init();
762void _thr_hash_add(struct pthread *);
763void _thr_hash_remove(struct pthread *);
764struct pthread *_thr_hash_find(struct pthread *);
765void _thr_link(struct pthread *curthread, struct pthread *thread);
766void _thr_unlink(struct pthread *curthread, struct pthread *thread);
767void _thr_suspend_check(struct pthread *curthread);
768void _thr_assert_lock_level() __dead2;
fd4288bd 769void _thr_ast(struct pthread *);
71b3fa15 770int _thr_get_tid(void);
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771void _thr_report_creation(struct pthread *curthread,
772 struct pthread *newthread);
773void _thr_report_death(struct pthread *curthread);
774void _thread_bp_create(void);
775void _thread_bp_death(void);
71b3fa15 776
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777/* #include <sys/aio.h> */
778#ifdef _SYS_AIO_H_
779int __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *);
780#endif
781
782/* #include <fcntl.h> */
783#ifdef _SYS_FCNTL_H_
784int __sys_fcntl(int, int, ...);
785int __sys_open(const char *, int, ...);
786#endif
787
788/* #include <sys/ioctl.h> */
789#ifdef _SYS_IOCTL_H_
790int __sys_ioctl(int, unsigned long, ...);
791#endif
792
793/* #inclde <sched.h> */
794#ifdef _SCHED_H_
795int __sys_sched_yield(void);
796#endif
797
798/* #include <signal.h> */
799#ifdef _SIGNAL_H_
800int __sys_kill(pid_t, int);
801int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
802int __sys_sigpending(sigset_t *);
803int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
804int __sys_sigsuspend(const sigset_t *);
805int __sys_sigreturn(ucontext_t *);
806int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
807#endif
808
809/* #include <sys/socket.h> */
810#ifdef _SYS_SOCKET_H_
811int __sys_accept(int, struct sockaddr *, socklen_t *);
812int __sys_connect(int, const struct sockaddr *, socklen_t);
813ssize_t __sys_recv(int, void *, size_t, int);
814ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
815ssize_t __sys_recvmsg(int, struct msghdr *, int);
816int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *,
817 off_t *, int);
818ssize_t __sys_sendmsg(int, const struct msghdr *, int);
819ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t);
820#endif
821
822/* #include <sys/uio.h> */
823#ifdef _SYS_UIO_H_
824ssize_t __sys_readv(int, const struct iovec *, int);
825ssize_t __sys_writev(int, const struct iovec *, int);
826#endif
827
828/* #include <time.h> */
829#ifdef _TIME_H_
830int __sys_nanosleep(const struct timespec *, struct timespec *);
831#endif
832
833/* #include <unistd.h> */
834#ifdef _UNISTD_H_
835int __sys_close(int);
836int __sys_execve(const char *, char * const *, char * const *);
837int __sys_fork(void);
838int __sys_fsync(int);
839pid_t __sys_getpid(void);
840int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
841ssize_t __sys_read(int, void *, size_t);
842ssize_t __sys_write(int, const void *, size_t);
843void __sys_exit(int);
844int __sys_sigwait(const sigset_t *, int *);
845int __sys_sigtimedwait(const sigset_t *, siginfo_t *,
846 const struct timespec *);
847int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
848#endif
849
850/* #include <poll.h> */
851#ifdef _SYS_POLL_H_
852int __sys_poll(struct pollfd *, unsigned, int);
853#endif
854
855/* #include <sys/mman.h> */
856#ifdef _SYS_MMAN_H_
857int __sys_msync(void *, size_t, int);
858#endif
859
860static inline int
861_thr_isthreaded(void)
862{
863 return (__isthreaded != 0);
864}
865
866static inline int
867_thr_is_inited(void)
868{
869 return (_thr_initial != 0);
870}
871
872static inline void
873_thr_check_init(void)
874{
875 if (_thr_initial == 0)
876 _libpthread_init(0);
877}
878
879__END_DECLS
880
881#endif /* !_THR_PRIVATE_H */