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-rw-r--r--nptl/tst-barrier2.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/nptl/tst-barrier2.c b/nptl/tst-barrier2.c
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+/* Copyright (C) 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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. */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+
+int
+main (void)
+{
+ size_t ps = sysconf (_SC_PAGESIZE);
+ char tmpfname[] = "/tmp/tst-barrier2.XXXXXX";
+ char data[ps];
+ void *mem;
+ int fd;
+ pthread_barrier_t *b;
+ pthread_barrierattr_t a;
+ pid_t pid;
+ int serials = 0;
+ int cnt;
+ int status;
+ int p;
+
+ fd = mkstemp (tmpfname);
+ if (fd == -1)
+ {
+ printf ("cannot open temporary file: %m\n");
+ exit (1);
+ }
+
+ /* Make sure it is always removed. */
+ unlink (tmpfname);
+
+ /* Create one page of data. */
+ memset (data, '\0', ps);
+
+ /* Write the data to the file. */
+ if (write (fd, data, ps) != ps)
+ {
+ puts ("short write");
+ exit (1);
+ }
+
+ mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (mem == MAP_FAILED)
+ {
+ printf ("mmap failed: %m\n");
+ exit (1);
+ }
+
+ b = (pthread_barrier_t *) (((uintptr_t) mem + __alignof (pthread_barrier_t))
+ & ~(__alignof (pthread_barrier_t) - 1));
+
+ if (pthread_barrierattr_init (&a) != 0)
+ {
+ puts ("barrierattr_init failed");
+ exit (1);
+ }
+
+ if (pthread_barrierattr_getpshared (&a, &p) != 0)
+ {
+ puts ("1st barrierattr_getpshared failed");
+ exit (1);
+ }
+
+ if (p != PTHREAD_PROCESS_PRIVATE)
+ {
+ puts ("default pshared value wrong");
+ exit (1);
+ }
+
+ if (pthread_barrierattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)
+ {
+ puts ("barrierattr_setpshared failed");
+ exit (1);
+ }
+
+ if (pthread_barrierattr_getpshared (&a, &p) != 0)
+ {
+ puts ("2nd barrierattr_getpshared failed");
+ exit (1);
+ }
+
+ if (p != PTHREAD_PROCESS_SHARED)
+ {
+ puts ("pshared value after setpshared call wrong");
+ exit (1);
+ }
+
+ if (pthread_barrier_init (b, &a, 2) != 0)
+ {
+ puts ("barrier_init failed");
+ exit (1);
+ }
+
+ if (pthread_barrierattr_destroy (&a) != 0)
+ {
+ puts ("barrierattr_destroy failed");
+ exit (1);
+ }
+
+ puts ("going to fork now");
+ pid = fork ();
+ if (pid == -1)
+ {
+ puts ("fork failed");
+ exit (1);
+ }
+
+ /* Just to be sure we don't hang forever. */
+ alarm (4);
+
+#define N 30
+ for (cnt = 0; cnt < N; ++cnt)
+ {
+ int e;
+
+ e = pthread_barrier_wait (b);
+ if (e == PTHREAD_BARRIER_SERIAL_THREAD)
+ ++serials;
+ else if (e != 0)
+ {
+ printf ("%s: barrier_wait returned value %d != 0 and PTHREAD_BARRIER_SERIAL_THREAD\n",
+ pid == 0 ? "child" : "parent", e);
+ exit (1);
+ }
+ }
+
+ alarm (0);
+
+ printf ("%s: was %d times the serial thread\n",
+ pid == 0 ? "child" : "parent", serials);
+
+ if (pid == 0)
+ /* The child. Pass the number of times we had the serializing
+ thread back to the parent. */
+ exit (serials);
+
+ if (waitpid (pid, &status, 0) != pid)
+ {
+ puts ("waitpid failed");
+ return 1;
+ }
+
+ if (!WIFEXITED (status))
+ {
+ puts ("child exited abnormally");
+ return 1;
+ }
+
+ if (WEXITSTATUS (status) + serials != N)
+ {
+ printf ("total number of serials is %d, expected %d\n",
+ WEXITSTATUS (status) + serials, N);
+ return 1;
+ }
+
+ exit (0);
+}