summaryrefslogtreecommitdiff
path: root/nptl/sysdeps/pthread/pthread.h
blob: 4dc0b2272be66f345866b234a7a672270544c2bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
   Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef _PTHREAD_H
#define _PTHREAD_H	1

#include <features.h>
#include <sched.h>
#include <time.h>

#define __need_sigset_t
#include <signal.h>
#include <bits/pthreadtypes.h>
#include <bits/setjmp.h>
#include <bits/wordsize.h>


/* Detach state.  */
enum
{
  PTHREAD_CREATE_JOINABLE,
#define PTHREAD_CREATE_JOINABLE	PTHREAD_CREATE_JOINABLE
  PTHREAD_CREATE_DETACHED
#define PTHREAD_CREATE_DETACHED	PTHREAD_CREATE_DETACHED
};


/* Mutex types.  */
enum
{
  PTHREAD_MUTEX_TIMED_NP,
  PTHREAD_MUTEX_RECURSIVE_NP,
  PTHREAD_MUTEX_ERRORCHECK_NP,
  PTHREAD_MUTEX_ADAPTIVE_NP
#ifdef __USE_UNIX98
  ,
  PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP,
  PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP,
  PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP,
  PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL
#endif
#ifdef __USE_GNU
  /* For compatibility.  */
  , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_TIMED_NP
#endif
};


#ifdef __USE_GNU
/* Robust mutex or not flags.  */
enum
{
  PTHREAD_MUTEX_STALLED_NP,
  PTHREAD_MUTEX_ROBUST_NP
};
#endif


#ifdef __USE_UNIX98
/* Mutex protocols.  */
enum
{
  PTHREAD_PRIO_NONE,
  PTHREAD_PRIO_INHERIT,
  PTHREAD_PRIO_PROTECT
};
#endif


/* Mutex initializers.  */
#if __WORDSIZE == 64
# define PTHREAD_MUTEX_INITIALIZER \
  { { 0, 0, 0, 0, 0, 0, { 0, 0 } } }
# ifdef __USE_GNU
#  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0, 0 } } }
#  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0, 0 } } }
#  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0, 0 } } }
# endif
#else
# define PTHREAD_MUTEX_INITIALIZER \
  { { 0, 0, 0, 0, 0, { 0 } } }
# ifdef __USE_GNU
#  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0 } } }
#  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0 } } }
#  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
  { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0 } } }
# endif
#endif


/* Read-write lock types.  */
#if defined __USE_UNIX98 || defined __USE_XOPEN2K
enum
{
  PTHREAD_RWLOCK_PREFER_READER_NP,
  PTHREAD_RWLOCK_PREFER_WRITER_NP,
  PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
  PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP
};

/* Read-write lock initializers.  */
# if __WORDSIZE == 64
#  define PTHREAD_RWLOCK_INITIALIZER \
  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }
# else
#  define PTHREAD_RWLOCK_INITIALIZER \
  { { 0, 0, 0, 0, 0, 0, 0, 0 } }
# endif
# ifdef __USE_GNU
#  if __WORDSIZE == 64
#   define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \
  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,					      \
      PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } }
#  else
#   define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \
  { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 0 } }
#  endif
# endif
#endif  /* Unix98 or XOpen2K */


/* Scheduler inheritance.  */
enum
{
  PTHREAD_INHERIT_SCHED,
#define PTHREAD_INHERIT_SCHED   PTHREAD_INHERIT_SCHED
  PTHREAD_EXPLICIT_SCHED
#define PTHREAD_EXPLICIT_SCHED  PTHREAD_EXPLICIT_SCHED
};


/* Scope handling.  */
enum
{
  PTHREAD_SCOPE_SYSTEM,
#define PTHREAD_SCOPE_SYSTEM    PTHREAD_SCOPE_SYSTEM
  PTHREAD_SCOPE_PROCESS
#define PTHREAD_SCOPE_PROCESS   PTHREAD_SCOPE_PROCESS
};


/* Process shared or private flag.  */
enum
{
  PTHREAD_PROCESS_PRIVATE,
#define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE
  PTHREAD_PROCESS_SHARED
#define PTHREAD_PROCESS_SHARED  PTHREAD_PROCESS_SHARED
};



/* Conditional variable handling.  */
#define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } }


/* Cleanup buffers */
struct _pthread_cleanup_buffer
{
  void (*__routine) (void *);             /* Function to call.  */
  void *__arg;                            /* Its argument.  */
  int __canceltype;                       /* Saved cancellation type. */
  struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions.  */
};

/* Cancellation */
enum
{
  PTHREAD_CANCEL_ENABLE,
#define PTHREAD_CANCEL_ENABLE   PTHREAD_CANCEL_ENABLE
  PTHREAD_CANCEL_DISABLE
#define PTHREAD_CANCEL_DISABLE  PTHREAD_CANCEL_DISABLE
};
enum
{
  PTHREAD_CANCEL_DEFERRED,
#define PTHREAD_CANCEL_DEFERRED	PTHREAD_CANCEL_DEFERRED
  PTHREAD_CANCEL_ASYNCHRONOUS
#define PTHREAD_CANCEL_ASYNCHRONOUS	PTHREAD_CANCEL_ASYNCHRONOUS
};
#define PTHREAD_CANCELED ((void *) -1)


/* Single execution handling.  */
#define PTHREAD_ONCE_INIT 0


#ifdef __USE_XOPEN2K
/* Value returned by 'pthread_barrier_wait' for one of the threads after
   the required number of threads have called this function.
   -1 is distinct from 0 and all errno constants */
# define PTHREAD_BARRIER_SERIAL_THREAD -1
#endif


__BEGIN_DECLS

/* Create a new thread, starting with execution of START-ROUTINE
   getting passed ARG.  Creation attributed come from ATTR.  The new
   handle is stored in *NEWTHREAD.  */
extern int pthread_create (pthread_t *__restrict __newthread,
			   __const pthread_attr_t *__restrict __attr,
			   void *(*__start_routine) (void *),
			   void *__restrict __arg) __THROW __nonnull ((1, 3));

/* Terminate calling thread.

   The registered cleanup handlers are called via exception handling
   so we cannot mark this function with __THROW.*/
extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__));

/* Make calling thread wait for termination of the thread TH.  The
   exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN
   is not NULL.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int pthread_join (pthread_t __th, void **__thread_return);

#ifdef __USE_GNU
/* Check whether thread TH has terminated.  If yes return the status of
   the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL.  */
extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW;

/* Make calling thread wait for termination of the thread TH, but only
   until TIMEOUT.  The exit status of the thread is stored in
   *THREAD_RETURN, if THREAD_RETURN is not NULL.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return,
				 __const struct timespec *__abstime);
#endif

/* Indicate that the thread TH is never to be joined with PTHREAD_JOIN.
   The resources of TH will therefore be freed immediately when it
   terminates, instead of waiting for another thread to perform PTHREAD_JOIN
   on it.  */
extern int pthread_detach (pthread_t __th) __THROW;


/* Obtain the identifier of the current thread.  */
extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__));

/* Compare two thread identifiers.  */
extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW;


/* Thread attribute handling.  */

/* Initialize thread attribute *ATTR with default attributes
   (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER,
    no user-provided stack).  */
extern int pthread_attr_init (pthread_attr_t *__attr) __THROW __nonnull ((1));

/* Destroy thread attribute *ATTR.  */
extern int pthread_attr_destroy (pthread_attr_t *__attr)
     __THROW __nonnull ((1));

/* Get detach state attribute.  */
extern int pthread_attr_getdetachstate (__const pthread_attr_t *__attr,
					int *__detachstate)
     __THROW __nonnull ((1, 2));

/* Set detach state attribute.  */
extern int pthread_attr_setdetachstate (pthread_attr_t *__attr,
					int __detachstate)
     __THROW __nonnull ((1));


/* Get the size of the guard area created for stack overflow protection.  */
extern int pthread_attr_getguardsize (__const pthread_attr_t *__attr,
				      size_t *__guardsize)
     __THROW __nonnull ((1, 2));

/* Set the size of the guard area created for stack overflow protection.  */
extern int pthread_attr_setguardsize (pthread_attr_t *__attr,
				      size_t __guardsize)
     __THROW __nonnull ((1));


/* Return in *PARAM the scheduling parameters of *ATTR.  */
extern int pthread_attr_getschedparam (__const pthread_attr_t *__restrict
				       __attr,
				       struct sched_param *__restrict __param)
     __THROW __nonnull ((1, 2));

/* Set scheduling parameters (priority, etc) in *ATTR according to PARAM.  */
extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr,
				       __const struct sched_param *__restrict
				       __param) __THROW __nonnull ((1, 2));

/* Return in *POLICY the scheduling policy of *ATTR.  */
extern int pthread_attr_getschedpolicy (__const pthread_attr_t *__restrict
					__attr, int *__restrict __policy)
     __THROW __nonnull ((1, 2));

/* Set scheduling policy in *ATTR according to POLICY.  */
extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy)
     __THROW __nonnull ((1));

/* Return in *INHERIT the scheduling inheritance mode of *ATTR.  */
extern int pthread_attr_getinheritsched (__const pthread_attr_t *__restrict
					 __attr, int *__restrict __inherit)
     __THROW __nonnull ((1, 2));

/* Set scheduling inheritance mode in *ATTR according to INHERIT.  */
extern int pthread_attr_setinheritsched (pthread_attr_t *__attr,
					 int __inherit)
     __THROW __nonnull ((1));


/* Return in *SCOPE the scheduling contention scope of *ATTR.  */
extern int pthread_attr_getscope (__const pthread_attr_t *__restrict __attr,
				  int *__restrict __scope)
     __THROW __nonnull ((1, 2));

/* Set scheduling contention scope in *ATTR according to SCOPE.  */
extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope)
     __THROW __nonnull ((1));

/* Return the previously set address for the stack.  */
extern int pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
				      __attr, void **__restrict __stackaddr)
     __THROW __nonnull ((1, 2)) __attribute_deprecated__;

/* Set the starting address of the stack of the thread to be created.
   Depending on whether the stack grows up or down the value must either
   be higher or lower than all the address in the memory block.  The
   minimal size of the block must be PTHREAD_STACK_MIN.  */
extern int pthread_attr_setstackaddr (pthread_attr_t *__attr,
				      void *__stackaddr)
     __THROW __nonnull ((1)) __attribute_deprecated__;

/* Return the currently used minimal stack size.  */
extern int pthread_attr_getstacksize (__const pthread_attr_t *__restrict
				      __attr, size_t *__restrict __stacksize)
     __THROW __nonnull ((1, 2));

/* Add information about the minimum stack size needed for the thread
   to be started.  This size must never be less than PTHREAD_STACK_MIN
   and must also not exceed the system limits.  */
extern int pthread_attr_setstacksize (pthread_attr_t *__attr,
				      size_t __stacksize)
     __THROW __nonnull ((1));

#ifdef __USE_XOPEN2K
/* Return the previously set address for the stack.  */
extern int pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
				  void **__restrict __stackaddr,
				  size_t *__restrict __stacksize)
     __THROW __nonnull ((1, 2, 3));

/* The following two interfaces are intended to replace the last two.  They
   require setting the address as well as the size since only setting the
   address will make the implementation on some architectures impossible.  */
extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
				  size_t __stacksize) __THROW __nonnull ((1));
#endif

#ifdef __USE_GNU
/* Thread created with attribute ATTR will be limited to run only on
   the processors represented in CPUSET.  */
extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr,
					size_t __cpusetsize,
					__const cpu_set_t *__cpuset)
     __THROW __nonnull ((1, 3));

/* Get bit set in CPUSET representing the processors threads created with
   ATTR can run on.  */
extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr,
					size_t __cpusetsize,
					cpu_set_t *__cpuset)
     __THROW __nonnull ((1, 3));


/* Initialize thread attribute *ATTR with attributes corresponding to the
   already running thread TH.  It shall be called on unitialized ATTR
   and destroyed with pthread_attr_destroy when no longer needed.  */
extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr)
     __THROW __nonnull ((2));
#endif


/* Functions for scheduling control.  */

/* Set the scheduling parameters for TARGET_THREAD according to POLICY
   and *PARAM.  */
extern int pthread_setschedparam (pthread_t __target_thread, int __policy,
				  __const struct sched_param *__param)
     __THROW __nonnull ((3));

/* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */
extern int pthread_getschedparam (pthread_t __target_thread,
				  int *__restrict __policy,
				  struct sched_param *__restrict __param)
     __THROW __nonnull ((2, 3));

/* Set the scheduling priority for TARGET_THREAD.  */
extern int pthread_setschedprio (pthread_t __target_thread, int __prio)
     __THROW;


#ifdef __USE_UNIX98
/* Determine level of concurrency.  */
extern int pthread_getconcurrency (void) __THROW;

/* Set new concurrency level to LEVEL.  */
extern int pthread_setconcurrency (int __level) __THROW;
#endif

#ifdef __USE_GNU
/* Yield the processor to another thread or process.
   This function is similar to the POSIX `sched_yield' function but
   might be differently implemented in the case of a m-on-n thread
   implementation.  */
extern int pthread_yield (void) __THROW;


/* Limit specified thread TH to run only on the processors represented
   in CPUSET.  */
extern int pthread_setaffinity_np (pthread_t __th, size_t __cpusetsize,
				   __const cpu_set_t *__cpuset)
     __THROW __nonnull ((3));

/* Get bit set in CPUSET representing the processors TH can run on.  */
extern int pthread_getaffinity_np (pthread_t __th, size_t __cpusetsize,
				   cpu_set_t *__cpuset)
     __THROW __nonnull ((3));
#endif


/* Functions for handling initialization.  */

/* Guarantee that the initialization function INIT_ROUTINE will be called
   only once, even if pthread_once is executed several times with the
   same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or
   extern variable initialized to PTHREAD_ONCE_INIT.

   The initialization functions might throw exception which is why
   this function is not marked with __THROW.  */
extern int pthread_once (pthread_once_t *__once_control,
			 void (*__init_routine) (void)) __nonnull ((1, 2));


/* Functions for handling cancellation.

   Note that these functions are explicitly not marked to not throw an
   exception in C++ code.  If cancellation is implemented by unwinding
   this is necessary to have the compiler generate the unwind information.  */

/* Set cancelability state of current thread to STATE, returning old
   state in *OLDSTATE if OLDSTATE is not NULL.  */
extern int pthread_setcancelstate (int __state, int *__oldstate);

/* Set cancellation state of current thread to TYPE, returning the old
   type in *OLDTYPE if OLDTYPE is not NULL.  */
extern int pthread_setcanceltype (int __type, int *__oldtype);

/* Cancel THREAD immediately or at the next possibility.  */
extern int pthread_cancel (pthread_t __th);

/* Test for pending cancellation for the current thread and terminate
   the thread as per pthread_exit(PTHREAD_CANCELED) if it has been
   cancelled.  */
extern void pthread_testcancel (void);


/* Cancellation handling with integration into exception handling.  */

typedef struct
{
  struct
  {
    __jmp_buf __cancel_jmp_buf;
    int __mask_was_saved;
  } __cancel_jmp_buf[1];
  void *__pad[4];
} __pthread_unwind_buf_t __attribute__ ((__aligned__));

/* No special attributes by default.  */
#ifndef __cleanup_fct_attribute
# define __cleanup_fct_attribute
#endif


/* Structure to hold the cleanup handler information.  */
struct __pthread_cleanup_frame
{
  void (*__cancel_routine) (void *);
  void *__cancel_arg;
  int __do_it;
  int __cancel_type;
};

#if defined __GNUC__ && defined __EXCEPTIONS
# ifdef __cplusplus
/* Class to handle cancellation handler invocation.  */
class __pthread_cleanup_class
{
  void (*__cancel_routine) (void *);
  void *__cancel_arg;
  int __do_it;
  int __cancel_type;

 public:
  __pthread_cleanup_class (void (*__fct) (void *), void *__arg)
    : __cancel_routine (__fct), __cancel_arg (__arg), __do_it (1) { }
  ~__pthread_cleanup_class () { if (__do_it) __cancel_routine (__cancel_arg); }
  void __setdoit (int __newval) { __do_it = __newval; }
  void __defer () { pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED,
					   &__cancel_type); }
  void __restore () const { pthread_setcanceltype (__cancel_type, 0); }
};

/* Install a cleanup handler: ROUTINE will be called with arguments ARG
   when the thread is canceled or calls pthread_exit.  ROUTINE will also
   be called with arguments ARG when the matching pthread_cleanup_pop
   is executed with non-zero EXECUTE argument.

   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
   be used in matching pairs at the same nesting level of braces.  */
#  define pthread_cleanup_push(routine, arg) \
  do {									      \
    __pthread_cleanup_class __clframe (routine, arg)

/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
   If EXECUTE is non-zero, the handler function is called. */
#  define pthread_cleanup_pop(execute) \
    __clframe.__setdoit (execute);					      \
  } while (0)

#  ifdef __USE_GNU
/* Install a cleanup handler as pthread_cleanup_push does, but also
   saves the current cancellation type and sets it to deferred
   cancellation.  */
#   define pthread_cleanup_push_defer_np(routine, arg) \
  do {									      \
    __pthread_cleanup_class __clframe (routine, arg);			      \
    __clframe.__defer ()

/* Remove a cleanup handler as pthread_cleanup_pop does, but also
   restores the cancellation type that was in effect when the matching
   pthread_cleanup_push_defer was called.  */
#   define pthread_cleanup_pop_restore_np(execute) \
    __clframe.__restore ();						      \
    __clframe.__setdoit (execute);					      \
  } while (0)
#  endif
# else
/* Function called to call the cleanup handler.  As an extern inline
   function the compiler is free to decide inlining the change when
   needed or fall back on the copy which must exist somewhere
   else.  */
__extern_inline void
__pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame)
{
  if (__frame->__do_it)
    __frame->__cancel_routine (__frame->__cancel_arg);
}

/* Install a cleanup handler: ROUTINE will be called with arguments ARG
   when the thread is canceled or calls pthread_exit.  ROUTINE will also
   be called with arguments ARG when the matching pthread_cleanup_pop
   is executed with non-zero EXECUTE argument.

   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
   be used in matching pairs at the same nesting level of braces.  */
#  define pthread_cleanup_push(routine, arg) \
  do {									      \
    struct __pthread_cleanup_frame __clframe				      \
      __attribute__ ((__cleanup__ (__pthread_cleanup_routine)))		      \
      = { .__cancel_routine = (routine), .__cancel_arg = (arg),	 	      \
	  .__do_it = 1 };

/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
   If EXECUTE is non-zero, the handler function is called. */
#  define pthread_cleanup_pop(execute) \
    __clframe.__do_it = (execute);					      \
  } while (0)

#  ifdef __USE_GNU
/* Install a cleanup handler as pthread_cleanup_push does, but also
   saves the current cancellation type and sets it to deferred
   cancellation.  */
#   define pthread_cleanup_push_defer_np(routine, arg) \
  do {									      \
    struct __pthread_cleanup_frame __clframe				      \
      __attribute__ ((__cleanup__ (__pthread_cleanup_routine)))		      \
      = { .__cancel_routine = (routine), .__cancel_arg = (arg),		      \
	  .__do_it = 1 };						      \
    (void) pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED,		      \
				  &__clframe.__cancel_type)

/* Remove a cleanup handler as pthread_cleanup_pop does, but also
   restores the cancellation type that was in effect when the matching
   pthread_cleanup_push_defer was called.  */
#   define pthread_cleanup_pop_restore_np(execute) \
    (void) pthread_setcanceltype (__clframe.__cancel_type, NULL);	      \
    __clframe.__do_it = (execute);					      \
  } while (0)
#  endif
# endif
#else
/* Install a cleanup handler: ROUTINE will be called with arguments ARG
   when the thread is canceled or calls pthread_exit.  ROUTINE will also
   be called with arguments ARG when the matching pthread_cleanup_pop
   is executed with non-zero EXECUTE argument.

   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
   be used in matching pairs at the same nesting level of braces.  */
# define pthread_cleanup_push(routine, arg) \
  do {									      \
    __pthread_unwind_buf_t __cancel_buf;				      \
    void (*__cancel_routine) (void *) = (routine);			      \
    void *__cancel_arg = (arg);						      \
    int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *)		      \
				      __cancel_buf.__cancel_jmp_buf, 0);      \
    if (__builtin_expect (not_first_call, 0))				      \
      {									      \
	__cancel_routine (__cancel_arg);				      \
	__pthread_unwind_next (&__cancel_buf);				      \
	/* NOTREACHED */						      \
      }									      \
									      \
    __pthread_register_cancel (&__cancel_buf);				      \
    do {
extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
     __cleanup_fct_attribute;

/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
   If EXECUTE is non-zero, the handler function is called. */
# define pthread_cleanup_pop(execute) \
    } while (0);							      \
    __pthread_unregister_cancel (&__cancel_buf);			      \
    if (execute)							      \
      __cancel_routine (__cancel_arg);					      \
  } while (0)
extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
  __cleanup_fct_attribute;

# ifdef __USE_GNU
/* Install a cleanup handler as pthread_cleanup_push does, but also
   saves the current cancellation type and sets it to deferred
   cancellation.  */
#  define pthread_cleanup_push_defer_np(routine, arg) \
  do {									      \
    __pthread_unwind_buf_t __cancel_buf;				      \
    void (*__cancel_routine) (void *) = (routine);			      \
    void *__cancel_arg = (arg);						      \
    int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *)		      \
				      __cancel_buf.__cancel_jmp_buf, 0);      \
    if (__builtin_expect (not_first_call, 0))				      \
      {									      \
	__cancel_routine (__cancel_arg);				      \
	__pthread_unwind_next (&__cancel_buf);				      \
	/* NOTREACHED */						      \
      }									      \
									      \
    __pthread_register_cancel_defer (&__cancel_buf);			      \
    do {
extern void __pthread_register_cancel_defer (__pthread_unwind_buf_t *__buf)
     __cleanup_fct_attribute;

/* Remove a cleanup handler as pthread_cleanup_pop does, but also
   restores the cancellation type that was in effect when the matching
   pthread_cleanup_push_defer was called.  */
#  define pthread_cleanup_pop_restore_np(execute) \
    } while (0);							      \
    __pthread_unregister_cancel_restore (&__cancel_buf);		      \
    if (execute)							      \
      __cancel_routine (__cancel_arg);					      \
  } while (0)
extern void __pthread_unregister_cancel_restore (__pthread_unwind_buf_t *__buf)
  __cleanup_fct_attribute;
# endif

/* Internal interface to initiate cleanup.  */
extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
     __cleanup_fct_attribute __attribute__ ((__noreturn__))
# ifndef SHARED
     __attribute__ ((__weak__))
# endif
     ;
#endif

/* Function used in the macros.  */
struct __jmp_buf_tag;
extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROW;


/* Mutex handling.  */

/* Initialize a mutex.  */
extern int pthread_mutex_init (pthread_mutex_t *__mutex,
			       __const pthread_mutexattr_t *__mutexattr)
     __THROW __nonnull ((1));

/* Destroy a mutex.  */
extern int pthread_mutex_destroy (pthread_mutex_t *__mutex)
     __THROW __nonnull ((1));

/* Try locking a mutex.  */
extern int pthread_mutex_trylock (pthread_mutex_t *__mutex)
     __THROW __nonnull ((1));

/* Lock a mutex.  */
extern int pthread_mutex_lock (pthread_mutex_t *__mutex)
     __THROW __nonnull ((1));

#ifdef __USE_XOPEN2K
/* Wait until lock becomes available, or specified time passes. */
extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex,
                                    __const struct timespec *__restrict
                                    __abstime) __THROW __nonnull ((1, 2));
#endif

/* Unlock a mutex.  */
extern int pthread_mutex_unlock (pthread_mutex_t *__mutex)
     __THROW __nonnull ((1));


#ifdef __USE_UNIX98
/* Get the priority ceiling of MUTEX.  */
extern int pthread_mutex_getprioceiling (__const pthread_mutex_t *
					 __restrict __mutex,
					 int *__restrict __prioceiling)
     __THROW __nonnull ((1, 2));

/* Set the priority ceiling of MUTEX to PRIOCEILING, return old
   priority ceiling value in *OLD_CEILING.  */
extern int pthread_mutex_setprioceiling (pthread_mutex_t *__restrict __mutex,
					 int __prioceiling,
					 int *__restrict __old_ceiling)
     __THROW __nonnull ((1, 3));
#endif


#ifdef __USE_GNU
/* Declare the state protected by MUTEX as consistent.  */
extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex)
     __THROW __nonnull ((1));
#endif


/* Functions for handling mutex attributes.  */

/* Initialize mutex attribute object ATTR with default attributes
   (kind is PTHREAD_MUTEX_TIMED_NP).  */
extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr)
     __THROW __nonnull ((1));

/* Destroy mutex attribute object ATTR.  */
extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr)
     __THROW __nonnull ((1));

/* Get the process-shared flag of the mutex attribute ATTR.  */
extern int pthread_mutexattr_getpshared (__const pthread_mutexattr_t *
					 __restrict __attr,
					 int *__restrict __pshared)
     __THROW __nonnull ((1, 2));

/* Set the process-shared flag of the mutex attribute ATTR.  */
extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr,
					 int __pshared)
     __THROW __nonnull ((1));

#ifdef __USE_UNIX98
/* Return in *KIND the mutex kind attribute in *ATTR.  */
extern int pthread_mutexattr_gettype (__const pthread_mutexattr_t *__restrict
				      __attr, int *__restrict __kind)
     __THROW __nonnull ((1, 2));

/* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL,
   PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or
   PTHREAD_MUTEX_DEFAULT).  */
extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind)
     __THROW __nonnull ((1));

/* Return in *PROTOCOL the mutex protocol attribute in *ATTR.  */
extern int pthread_mutexattr_getprotocol (__const pthread_mutexattr_t *
					  __restrict __attr,
					  int *__restrict __protocol)
     __THROW __nonnull ((1, 2));

/* Set the mutex protocol attribute in *ATTR to PROTOCOL (either
   PTHREAD_PRIO_NONE, PTHREAD_PRIO_INHERIT, or PTHREAD_PRIO_PROTECT).  */
extern int pthread_mutexattr_setprotocol (pthread_mutexattr_t *__attr,
					  int __protocol)
     __THROW __nonnull ((1));

/* Return in *PRIOCEILING the mutex prioceiling attribute in *ATTR.  */
extern int pthread_mutexattr_getprioceiling (__const pthread_mutexattr_t *
					     __restrict __attr,
					     int *__restrict __prioceiling)
     __THROW __nonnull ((1, 2));

/* Set the mutex prioceiling attribute in *ATTR to PRIOCEILING.  */
extern int pthread_mutexattr_setprioceiling (pthread_mutexattr_t *__attr,
					     int __prioceiling)
     __THROW __nonnull ((1));
#endif

#ifdef __USE_GNU
/* Get the robustness flag of the mutex attribute ATTR.  */
extern int pthread_mutexattr_getrobust_np (__const pthread_mutexattr_t *__attr,
					   int *__robustness)
     __THROW __nonnull ((1, 2));

/* Set the robustness flag of the mutex attribute ATTR.  */
extern int pthread_mutexattr_setrobust_np (pthread_mutexattr_t *__attr,
					   int __robustness)
     __THROW __nonnull ((1));
#endif


#if defined __USE_UNIX98 || defined __USE_XOPEN2K
/* Functions for handling read-write locks.  */

/* Initialize read-write lock RWLOCK using attributes ATTR, or use
   the default values if later is NULL.  */
extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
				__const pthread_rwlockattr_t *__restrict
				__attr) __THROW __nonnull ((1));

/* Destroy read-write lock RWLOCK.  */
extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock)
     __THROW __nonnull ((1));

/* Acquire read lock for RWLOCK.  */
extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock)
     __THROW __nonnull ((1));

/* Try to acquire read lock for RWLOCK.  */
extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock)
  __THROW __nonnull ((1));

# ifdef __USE_XOPEN2K
/* Try to acquire read lock for RWLOCK or return after specfied time.  */
extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock,
				       __const struct timespec *__restrict
				       __abstime) __THROW __nonnull ((1, 2));
# endif

/* Acquire write lock for RWLOCK.  */
extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock)
     __THROW __nonnull ((1));

/* Try to acquire write lock for RWLOCK.  */
extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock)
     __THROW __nonnull ((1));

# ifdef __USE_XOPEN2K
/* Try to acquire write lock for RWLOCK or return after specfied time.  */
extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock,
				       __const struct timespec *__restrict
				       __abstime) __THROW __nonnull ((1, 2));
# endif

/* Unlock RWLOCK.  */
extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock)
     __THROW __nonnull ((1));


/* Functions for handling read-write lock attributes.  */

/* Initialize attribute object ATTR with default values.  */
extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr)
     __THROW __nonnull ((1));

/* Destroy attribute object ATTR.  */
extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr)
     __THROW __nonnull ((1));

/* Return current setting of process-shared attribute of ATTR in PSHARED.  */
extern int pthread_rwlockattr_getpshared (__const pthread_rwlockattr_t *
					  __restrict __attr,
					  int *__restrict __pshared)
     __THROW __nonnull ((1, 2));

/* Set process-shared attribute of ATTR to PSHARED.  */
extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr,
					  int __pshared)
     __THROW __nonnull ((1));

/* Return current setting of reader/writer preference.  */
extern int pthread_rwlockattr_getkind_np (__const pthread_rwlockattr_t *
					  __restrict __attr,
					  int *__restrict __pref)
     __THROW __nonnull ((1, 2));

/* Set reader/write preference.  */
extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr,
					  int __pref) __THROW __nonnull ((1));
#endif


/* Functions for handling conditional variables.  */

/* Initialize condition variable COND using attributes ATTR, or use
   the default values if later is NULL.  */
extern int pthread_cond_init (pthread_cond_t *__restrict __cond,
			      __const pthread_condattr_t *__restrict
			      __cond_attr) __THROW __nonnull ((1));

/* Destroy condition variable COND.  */
extern int pthread_cond_destroy (pthread_cond_t *__cond)
     __THROW __nonnull ((1));

/* Wake up one thread waiting for condition variable COND.  */
extern int pthread_cond_signal (pthread_cond_t *__cond)
     __THROW __nonnull ((1));

/* Wake up all threads waiting for condition variables COND.  */
extern int pthread_cond_broadcast (pthread_cond_t *__cond)
     __THROW __nonnull ((1));

/* Wait for condition variable COND to be signaled or broadcast.
   MUTEX is assumed to be locked before.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int pthread_cond_wait (pthread_cond_t *__restrict __cond,
			      pthread_mutex_t *__restrict __mutex)
     __nonnull ((1, 2));

/* Wait for condition variable COND to be signaled or broadcast until
   ABSTIME.  MUTEX is assumed to be locked before.  ABSTIME is an
   absolute time specification; zero is the beginning of the epoch
   (00:00:00 GMT, January 1, 1970).

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond,
				   pthread_mutex_t *__restrict __mutex,
				   __const struct timespec *__restrict
				   __abstime) __nonnull ((1, 2, 3));

/* Functions for handling condition variable attributes.  */

/* Initialize condition variable attribute ATTR.  */
extern int pthread_condattr_init (pthread_condattr_t *__attr)
     __THROW __nonnull ((1));

/* Destroy condition variable attribute ATTR.  */
extern int pthread_condattr_destroy (pthread_condattr_t *__attr)
     __THROW __nonnull ((1));

/* Get the process-shared flag of the condition variable attribute ATTR.  */
extern int pthread_condattr_getpshared (__const pthread_condattr_t *
                                        __restrict __attr,
                                        int *__restrict __pshared)
     __THROW __nonnull ((1, 2));

/* Set the process-shared flag of the condition variable attribute ATTR.  */
extern int pthread_condattr_setpshared (pthread_condattr_t *__attr,
                                        int __pshared) __THROW __nonnull ((1));

#ifdef __USE_XOPEN2K
/* Get the clock selected for the conditon variable attribute ATTR.  */
extern int pthread_condattr_getclock (__const pthread_condattr_t *
				      __restrict __attr,
				      __clockid_t *__restrict __clock_id)
     __THROW __nonnull ((1, 2));

/* Set the clock selected for the conditon variable attribute ATTR.  */
extern int pthread_condattr_setclock (pthread_condattr_t *__attr,
				      __clockid_t __clock_id)
     __THROW __nonnull ((1));
#endif


#ifdef __USE_XOPEN2K
/* Functions to handle spinlocks.  */

/* Initialize the spinlock LOCK.  If PSHARED is nonzero the spinlock can
   be shared between different processes.  */
extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared)
     __THROW __nonnull ((1));

/* Destroy the spinlock LOCK.  */
extern int pthread_spin_destroy (pthread_spinlock_t *__lock)
     __THROW __nonnull ((1));

/* Wait until spinlock LOCK is retrieved.  */
extern int pthread_spin_lock (pthread_spinlock_t *__lock)
     __THROW __nonnull ((1));

/* Try to lock spinlock LOCK.  */
extern int pthread_spin_trylock (pthread_spinlock_t *__lock)
     __THROW __nonnull ((1));

/* Release spinlock LOCK.  */
extern int pthread_spin_unlock (pthread_spinlock_t *__lock)
     __THROW __nonnull ((1));


/* Functions to handle barriers.  */

/* Initialize BARRIER with the attributes in ATTR.  The barrier is
   opened when COUNT waiters arrived.  */
extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier,
				 __const pthread_barrierattr_t *__restrict
				 __attr, unsigned int __count)
     __THROW __nonnull ((1));

/* Destroy a previously dynamically initialized barrier BARRIER.  */
extern int pthread_barrier_destroy (pthread_barrier_t *__barrier)
     __THROW __nonnull ((1));

/* Wait on barrier BARRIER.  */
extern int pthread_barrier_wait (pthread_barrier_t *__barrier)
     __THROW __nonnull ((1));


/* Initialize barrier attribute ATTR.  */
extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr)
     __THROW __nonnull ((1));

/* Destroy previously dynamically initialized barrier attribute ATTR.  */
extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr)
     __THROW __nonnull ((1));

/* Get the process-shared flag of the barrier attribute ATTR.  */
extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t *
					   __restrict __attr,
					   int *__restrict __pshared)
     __THROW __nonnull ((1, 2));

/* Set the process-shared flag of the barrier attribute ATTR.  */
extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr,
                                           int __pshared)
     __THROW __nonnull ((1));
#endif


/* Functions for handling thread-specific data.  */

/* Create a key value identifying a location in the thread-specific
   data area.  Each thread maintains a distinct thread-specific data
   area.  DESTR_FUNCTION, if non-NULL, is called with the value
   associated to that key when the key is destroyed.
   DESTR_FUNCTION is not called if the value associated is NULL when
   the key is destroyed.  */
extern int pthread_key_create (pthread_key_t *__key,
			       void (*__destr_function) (void *))
     __THROW __nonnull ((1));

/* Destroy KEY.  */
extern int pthread_key_delete (pthread_key_t __key) __THROW;

/* Return current value of the thread-specific data slot identified by KEY.  */
extern void *pthread_getspecific (pthread_key_t __key) __THROW;

/* Store POINTER in the thread-specific data slot identified by KEY. */
extern int pthread_setspecific (pthread_key_t __key,
				__const void *__pointer) __THROW ;


#ifdef __USE_XOPEN2K
/* Get ID of CPU-time clock for thread THREAD_ID.  */
extern int pthread_getcpuclockid (pthread_t __thread_id,
				  __clockid_t *__clock_id)
     __THROW __nonnull ((2));
#endif


/* Install handlers to be called when a new process is created with FORK.
   The PREPARE handler is called in the parent process just before performing
   FORK. The PARENT handler is called in the parent process just after FORK.
   The CHILD handler is called in the child process.  Each of the three
   handlers can be NULL, meaning that no handler needs to be called at that
   point.
   PTHREAD_ATFORK can be called several times, in which case the PREPARE
   handlers are called in LIFO order (last added with PTHREAD_ATFORK,
   first called before FORK), and the PARENT and CHILD handlers are called
   in FIFO (first added, first called).  */

extern int pthread_atfork (void (*__prepare) (void),
			   void (*__parent) (void),
			   void (*__child) (void)) __THROW;


#ifdef __USE_EXTERN_INLINES
/* Optimizations.  */
__extern_inline int
__NTH (pthread_equal (pthread_t __thread1, pthread_t __thread2))
{
  return __thread1 == __thread2;
}
#endif

__END_DECLS

#endif	/* pthread.h */