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Diffstat (limited to 'nptl/tst-cond2.c')
-rw-r--r-- | nptl/tst-cond2.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/nptl/tst-cond2.c b/nptl/tst-cond2.c new file mode 100644 index 0000000..d1f3d0f --- /dev/null +++ b/nptl/tst-cond2.c @@ -0,0 +1,118 @@ +/* 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 <error.h> +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> + + +static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; + + +static void * +tf (void *a) +{ + int i = (long int) a; + int err; + + printf ("child %d: wait\n", i); + + err = pthread_cond_wait (&cond, &mut); + if (err != 0) + error (EXIT_FAILURE, err, "child %d: failed to wait", i); + + printf ("child %d: woken up\n", i); + + err = pthread_mutex_unlock (&mut); + if (err != 0) + error (EXIT_FAILURE, err, "child %d: unlock failed", i); + + printf ("child %d: done\n", i); + + return NULL; +} + + +#define N 10 + + +static int +do_test (void) +{ + pthread_t th[N]; + int i; + int err; + + printf ("&cond = %p\n&mut = %p\n", &cond, &mut); + + puts ("first lock"); + + err = pthread_mutex_lock (&mut); + if (err != 0) + error (EXIT_FAILURE, err, "initial locking failed"); + + for (i = 0; i < N; ++i) + { + printf ("create thread %d\n", i); + + err = pthread_create (&th[i], NULL, tf, (void *) (long int) i); + if (err != 0) + error (EXIT_FAILURE, err, "cannot create thread %d", i); + + printf ("wait for child %d\n", i); + + /* Lock and thereby wait for the child to start up and get the + conditional variable. */ + pthread_mutex_lock (&mut); + } + + puts ("final unlock"); + + /* Unlock in preparation of the broadcast. */ + err = pthread_mutex_unlock (&mut); + if (err != 0) + error (EXIT_FAILURE, err, "parent: unlock failed"); + + puts ("broadcast"); + + /* Wake up all threads. */ + err = pthread_cond_broadcast (&cond); + if (err != 0) + error (EXIT_FAILURE, err, "parent: broadcast failed"); + + /* Join all threads. */ + for (i = 0; i < N; ++i) + { + printf ("join thread %d\n", i); + + err = pthread_join (th[i], NULL); + if (err != 0) + error (EXIT_FAILURE, err, "join of child %d failed", i); + } + + puts ("done"); + + return 0; +} + + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |