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authorUlrich Drepper <drepper@redhat.com>2000-06-26 01:47:56 +0000
committerUlrich Drepper <drepper@redhat.com>2000-06-26 01:47:56 +0000
commitd82e4c7bb231c9e0f835bd46467563ac3b56cebe (patch)
treea408089f079a086df0ed1602c67612d12fc7ac2a /linuxthreads/Examples
parent7475d01602e881e206a29ee30bc8c3e85c235379 (diff)
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Update.
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.
Diffstat (limited to 'linuxthreads/Examples')
-rw-r--r--linuxthreads/Examples/ex10.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/linuxthreads/Examples/ex10.c b/linuxthreads/Examples/ex10.c
new file mode 100644
index 0000000..d89f4f4
--- /dev/null
+++ b/linuxthreads/Examples/ex10.c
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+/* Tests for pthread_mutex_timedlock function.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Kaz Kylheku <kaz@ashi.footprints.net>, 2000.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <time.h>
+
+#define NUM_THREADS 10
+#define NUM_ITERS 50
+#define TIMEOUT_NS 100000000L
+
+static void *thread (void *);
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+int
+main (void)
+{
+ pthread_t th;
+ int i;
+
+ for (i = 0; i < NUM_THREADS; i++)
+ {
+ if (pthread_create (&th, NULL, thread, NULL) != 0)
+ error (EXIT_FAILURE, 0, "cannot create thread");
+ }
+
+ (void) thread (NULL);
+ /* notreached */
+ return 0;
+}
+
+
+static void *
+thread (void *arg)
+{
+ int i;
+ pthread_t self = pthread_self ();
+ static int linecount; /* protected by flockfile(stdout) */
+
+ for (i = 0; i < NUM_ITERS; i++)
+ {
+ struct timespec ts;
+
+ for (;;)
+ {
+
+ clock_gettime (CLOCK_REALTIME, &ts);
+
+ ts.tv_nsec += TIMEOUT_NS;
+
+ if (ts.tv_nsec > 1000000000L) {
+ ts.tv_sec++;
+ ts.tv_nsec -= 1000000000L;
+ }
+
+ switch (pthread_mutex_timedlock (&mutex, &ts))
+ {
+ case 0:
+ flockfile (stdout);
+ printf ("%04d: thread %lu got mutex\n", ++linecount,
+ (unsigned long) self);
+ funlockfile (stdout);
+ break;
+ case ETIMEDOUT:
+ flockfile (stdout);
+ printf ("%04d: thread %lu timed out on mutex\n", ++linecount,
+ (unsigned long) self);
+ funlockfile (stdout);
+ continue;
+ }
+ break;
+ }
+
+ ts.tv_sec = 0;
+ ts.tv_nsec = TIMEOUT_NS;
+ nanosleep (&ts, NULL);
+
+ flockfile (stdout);
+ printf ("%04d: thread %lu releasing mutex\n", ++linecount,
+ (unsigned long) self);
+ funlockfile (stdout);
+ pthread_mutex_unlock (&mutex);
+ }
+
+ pthread_exit (NULL);
+}