glibc/linuxthreads/Examples/ex11.c
Roland McGrath cc7375ce02 2002-08-26 Brian Youmans <3diff@gnu.org>
* crypt/crypt.c: Changed copying permission notice to Lesser GPL
        from Library GPL.
        * crypt/crypt_util.c: Likewise.
        * crypt/ufc.c: Likewise.
        * elf/dl-conflict.c: Likewise.
        * elf/dl-iteratephdr.c: Likewise.
        * iconv/iconvconfig.h: Likewise.
        * linuxthreads/Examples/ex10.c: Likewise.
        * linuxthreads/Examples/ex11.c: Likewise.
        * linuxthreads/Examples/ex13.c: Likewise.
        * linuxthreads/Examples/ex8.c: Likewise.
        * linuxthreads/Examples/ex9.c: Likewise.
        * linuxthreads/barrier.c: Likewise.
        * linuxthreads/events.c: Likewise.
        * linuxthreads/lockfile.c: Likewise.
        * linuxthreads/no-tsd.c: Likewise.
        * linuxthreads/pt-machine.c: Likewise.
        * linuxthreads/ptclock_gettime.c: Likewise.
        * linuxthreads/ptclock_settime.c: Likewise.
        * linuxthreads/rwlock.c: Likewise.
        * linuxthreads/sysdeps/alpha/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/alpha/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/arm/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/arm/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/cris/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/cris/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/hppa/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/hppa/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/i386/i686/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/i386/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/i386/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/i386/useldt.h: Likewise.
        * linuxthreads/sysdeps/ia64/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/ia64/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/m68k/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/m68k/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/mips/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/mips/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/powerpc/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/powerpc/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/pthread/bits/initspin.h: Likewise.
        * linuxthreads/sysdeps/pthread/bits/libc-lock.h: Likewise.
        * linuxthreads/sysdeps/pthread/bits/libc-tsd.h: Likewise.
        * linuxthreads/sysdeps/pthread/getcpuclockid.c: Likewise.
        * linuxthreads/sysdeps/pthread/posix-timer.h: Likewise.
        * linuxthreads/sysdeps/pthread/timer_create.c: Likewise.
        * linuxthreads/sysdeps/pthread/timer_delete.c: Likewise.
        * linuxthreads/sysdeps/pthread/timer_getoverr.c: Likewise.
        * linuxthreads/sysdeps/pthread/timer_gettime.c: Likewise.
        * linuxthreads/sysdeps/pthread/timer_routines.c: Likewise.
        * linuxthreads/sysdeps/pthread/timer_settime.c: Likewise.
        * linuxthreads/sysdeps/pthread/tst-timer.c: Likewise.
        * linuxthreads/sysdeps/s390/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/s390/s390-32/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/s390/s390-64/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/sh/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/sh/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/sparc/sparc32/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/sparc/sparc32/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/sparc/sparc64/pspinlock.c: Likewise.
        * linuxthreads/sysdeps/sparc/sparc64/pt-machine.h: Likewise.
        * linuxthreads/sysdeps/unix/sysv/linux/bits/local_lim.h: Likewise.
        * linuxthreads/sysdeps/unix/sysv/linux/bits/posix_opt.h: Likewise.
        * linuxthreads/sysdeps/unix/sysv/linux/bits/sigthread.h: Likewise.
        * linuxthreads/sysdeps/unix/sysv/linux/hppa/bits/initspin.h: Likewise.
        * linuxthreads/sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Likewise.
        * linuxthreads/tststack.c: Likewise.
        * linuxthreads/unload.c: Likewise.
        * linuxthreads/weaks.c: Likewise.
        * linuxthreads/wrapsyscall.c: Likewise.
        * malloc/arena.c: Likewise.
        * malloc/hooks.c: Likewise.
        * malloc/malloc.c: Likewise.
        * posix/glob/Makefile.ami: Likewise.
        * posix/glob/Makefile.in: Likewise.
        * stdlib/gmp-impl.h: Likewise.
        * stdlib/gmp.h: Likewise.
        * sysdeps/generic/dl-iteratephdr-static.c: Likewise.
        * sysdeps/generic/strnlen.c: Likewise.
        * sysdeps/mach/hurd/powerpc/bits/sigcontext.h: Likewise.
        * sysdeps/mach/hurd/recvmsg.c: Likewise.
        * sysdeps/mach/hurd/sendmsg.c: Likewise.
        * sysdeps/mach/hurd/spawni.c: Likewise.
        * sysdeps/mach/powerpc/machine-sp.h: Likewise.
        * sysdeps/mach/powerpc/sysdep.h: Likewise.
        * sysdeps/mach/powerpc/thread_state.h: Likewise.
        * sysdeps/unix/bsd/bsd4.4/bits/socket.h: Likewise.
        * sysdeps/unix/sysv/linux/ia64/dl-iteratephdr-static.c: Likewise.
        * sysdeps/x86_64/gmp-mparam.h: Likewise.
2002-08-26 22:40:48 +00:00

155 lines
3.5 KiB
C

/* Test program for timedout read/write lock functions.
Copyright (C) 2000 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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; 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 <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#define NWRITERS 15
#define WRITETRIES 10
#define NREADERS 15
#define READTRIES 15
#define TIMEOUT 1000000
#define DELAY 1000000
static pthread_rwlock_t lock = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP;
static void *
writer_thread (void *nr)
{
struct timespec ts;
struct timespec delay;
int n;
ts.tv_sec = 0;
ts.tv_nsec = TIMEOUT;
delay.tv_sec = 0;
delay.tv_nsec = DELAY;
for (n = 0; n < WRITETRIES; ++n)
{
do
{
clock_gettime (CLOCK_REALTIME, &ts);
ts.tv_nsec += 2 * TIMEOUT;
printf ("writer thread %ld tries again\n", (long int) nr);
}
//while (pthread_rwlock_wrlock (&lock), 0);
while (pthread_rwlock_timedwrlock (&lock, &ts) == ETIMEDOUT);
printf ("writer thread %ld succeeded\n", (long int) nr);
nanosleep (&delay, NULL);
pthread_rwlock_unlock (&lock);
printf ("writer thread %ld released\n", (long int) nr);
}
return NULL;
}
static void *
reader_thread (void *nr)
{
struct timespec ts;
struct timespec delay;
int n;
delay.tv_sec = 0;
delay.tv_nsec = DELAY;
for (n = 0; n < READTRIES; ++n)
{
do
{
clock_gettime (CLOCK_REALTIME, &ts);
ts.tv_nsec += TIMEOUT;
printf ("reader thread %ld tries again\n", (long int) nr);
}
//while (pthread_rwlock_rdlock (&lock), 0);
while (pthread_rwlock_timedrdlock (&lock, &ts) == ETIMEDOUT);
printf ("reader thread %ld succeeded\n", (long int) nr);
nanosleep (&delay, NULL);
pthread_rwlock_unlock (&lock);
printf ("reader thread %ld released\n", (long int) nr);
}
return NULL;
}
int
main (void)
{
pthread_t thwr[NWRITERS];
pthread_t thrd[NREADERS];
int n;
void *res;
/* Make standard error the same as standard output. */
dup2 (1, 2);
/* Make sure we see all message, even those on stdout. */
setvbuf (stdout, NULL, _IONBF, 0);
for (n = 0; n < NWRITERS; ++n)
{
int err = pthread_create (&thwr[n], NULL, writer_thread,
(void *) (long int) n);
if (err != 0)
error (EXIT_FAILURE, err, "cannot create writer thread");
}
for (n = 0; n < NREADERS; ++n)
{
int err = pthread_create (&thrd[n], NULL, reader_thread,
(void *) (long int) n);
if (err != 0)
error (EXIT_FAILURE, err, "cannot create reader thread");
}
/* Wait for all the threads. */
for (n = 0; n < NWRITERS; ++n)
pthread_join (thwr[n], &res);
for (n = 0; n < NREADERS; ++n)
pthread_join (thrd[n], &res);
return 0;
}