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2000-06-25 Ulrich Drepper <drepper@redhat.com> * Makefile (tests): Add ex10. Add rules to build it. * Versions [GLIBC_2.2] (libpthread): Add pthread_mutex_timedlock, pthread_rwlock_timedrdlock, and pthread_rwlock_timedwrlock. * condvar.c (pthread_cond_wait): Allow mutex of kind PTHREAD_MUTEX_TIMED_NP. (pthread_cond_timedwait_relative): Likewise. * mutex.c (__pthread_mutex_init): Default is PTHREAD_MUTEX_TIMED_NP. (__pthread_mutex_trylock): Use __pthread_alt_trylock for PTHREAD_MUTEX_ERRORCHECK_NP. Handle PTHREAD_MUTEX_TIMED_NP. (__pthread_mutex_lock): Use __pthread_alt_lock for PTHREAD_MUTEX_ERRORCHECK_NP. Handle PTHREAD_MUTEX_TIMED_NP. (__pthread_mutex_timedlock): New function. (__pthread_mutex_unlock): Use __pthread_alt_unlock for PTHREAD_MUTEX_ERRORCHECK_NP. Handle PTHREAD_MUTEX_TIMED_NP. (__pthread_mutexattr_init): Use PTHREAD_MUTEX_TIMED_NP. (__pthread_mutexattr_settype): Allow PTHREAD_MUTEX_TIMED_NP. * spinlock.c: Implement alternate fastlocks. * spinlock.h: Add prototypes. * Examples/ex10.c: New file. * sysdeps/pthread/pthread.h: Add prototypes for new functions. Patch by Kaz Kylheku <kaz@ashi.footprints.net>. * rwlock.c (__pthread_rwlock_rdlock): Optimize loop a bit. (__pthread_rwlock_timedrdlock): New function. (__pthread_rwlock_timedwrlock): New function. Use laternate fastlock function everywhere.
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/* Tests for pthread_mutex_timedlock function.
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Copyright (C) 2000 Free Software Foundation, Inc.
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Contributed by Kaz Kylheku <kaz@ashi.footprints.net>, 2000.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <error.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <time.h>
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#define NUM_THREADS 10
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#define NUM_ITERS 50
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#define TIMEOUT_NS 100000000L
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static void *thread (void *);
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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int
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main (void)
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{
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pthread_t th;
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int i;
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for (i = 0; i < NUM_THREADS; i++)
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{
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if (pthread_create (&th, NULL, thread, NULL) != 0)
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error (EXIT_FAILURE, 0, "cannot create thread");
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}
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(void) thread (NULL);
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/* notreached */
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return 0;
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}
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static void *
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thread (void *arg)
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{
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int i;
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pthread_t self = pthread_self ();
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static int linecount; /* protected by flockfile(stdout) */
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for (i = 0; i < NUM_ITERS; i++)
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{
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struct timespec ts;
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for (;;)
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{
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clock_gettime (CLOCK_REALTIME, &ts);
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ts.tv_nsec += TIMEOUT_NS;
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if (ts.tv_nsec > 1000000000L) {
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ts.tv_sec++;
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ts.tv_nsec -= 1000000000L;
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}
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switch (pthread_mutex_timedlock (&mutex, &ts))
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{
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case 0:
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flockfile (stdout);
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printf ("%04d: thread %lu got mutex\n", ++linecount,
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(unsigned long) self);
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funlockfile (stdout);
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break;
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case ETIMEDOUT:
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flockfile (stdout);
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printf ("%04d: thread %lu timed out on mutex\n", ++linecount,
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(unsigned long) self);
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funlockfile (stdout);
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continue;
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}
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break;
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}
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ts.tv_sec = 0;
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ts.tv_nsec = TIMEOUT_NS;
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nanosleep (&ts, NULL);
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flockfile (stdout);
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printf ("%04d: thread %lu releasing mutex\n", ++linecount,
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(unsigned long) self);
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funlockfile (stdout);
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pthread_mutex_unlock (&mutex);
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}
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pthread_exit (NULL);
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}
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