1 /* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
27 pthread_cond_t cv
= PTHREAD_COND_INITIALIZER
;
28 pthread_mutex_t lock
= PTHREAD_MUTEX_INITIALIZER
;
31 enum { count
= 8 }; /* Number of worker threads. */
36 pthread_mutex_lock (&lock
);
42 if ((spins
++ % 1000) == 0)
44 pthread_mutex_unlock (&lock
);
46 pthread_mutex_lock (&lock
);
47 int njobs
= rand () % (count
+ 1);
49 if ((rand () % 30) == 0)
50 pthread_cond_broadcast (&cv
);
53 pthread_cond_signal (&cv
);
56 pthread_cond_broadcast (&cv
);
62 while (!nn
&& !exiting
)
63 pthread_cond_wait (&cv
, &lock
);
65 pthread_mutex_unlock (&lock
);
67 pthread_mutex_lock (&lock
);
71 pthread_mutex_unlock (&lock
);
78 fd
= open ("/dev/null", O_WRONLY
);
81 printf ("couldn't open /dev/null, %m\n");
85 pthread_t th
[count
+ 1];
88 pthread_attr_init (&attr
);
89 sz
= sysconf (_SC_PAGESIZE
);
90 #ifdef PTHREAD_STACK_MIN
91 if (sz
< PTHREAD_STACK_MIN
)
92 sz
= PTHREAD_STACK_MIN
;
94 pthread_attr_setstacksize (&attr
, sz
);
96 for (i
= 0; i
<= count
; ++i
)
97 if ((ret
= pthread_create (&th
[i
], &attr
, tf
, (void *) (long) i
)) != 0)
100 printf ("pthread_create %d failed: %m\n", i
);
104 struct timespec ts
= { .tv_sec
= 20, .tv_nsec
= 0 };
105 while (nanosleep (&ts
, &ts
) != 0);
107 pthread_mutex_lock (&lock
);
109 pthread_mutex_unlock (&lock
);
111 for (i
= 0; i
< count
; ++i
)
112 pthread_join (th
[i
], NULL
);
118 #define TEST_FUNCTION do_test ()
120 #include "../test-skeleton.c"