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Diffstat (limited to 'nptl/tst-barrier2.c')
| -rw-r--r-- | nptl/tst-barrier2.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/nptl/tst-barrier2.c b/nptl/tst-barrier2.c new file mode 100644 index 0000000000..5b620b7407 --- /dev/null +++ b/nptl/tst-barrier2.c @@ -0,0 +1,182 @@ +/* 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); +} |