diff options
Diffstat (limited to 'linuxthreads/Examples/ex8.c')
-rw-r--r-- | linuxthreads/Examples/ex8.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/linuxthreads/Examples/ex8.c b/linuxthreads/Examples/ex8.c deleted file mode 100644 index bda81b9c61..0000000000 --- a/linuxthreads/Examples/ex8.c +++ /dev/null @@ -1,101 +0,0 @@ -/* Tests for fork in multi-threaded environment. - Copyright (C) 2000 Free Software Foundation, Inc. - Contributed by Ulrich Drepper <drepper@cygnus.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 <stdlib.h> -#include <pthread.h> -#include <unistd.h> -#include <sys/wait.h> - -enum -{ - PREPARE_BIT = 1, - PARENT_BIT = 2, - CHILD_BIT = 4 -}; - -static int var; - -static void -prepare (void) -{ - var |= PREPARE_BIT; -} - -static void -parent (void) -{ - var |= PARENT_BIT; -} - -static void -child (void) -{ - var |= CHILD_BIT; -} - - -static void *thread (void *arg); - - -int -main (void) -{ - pthread_t th; - void *res; - - pthread_atfork (prepare, parent, child); - - if (pthread_create (&th, NULL, thread, NULL) != 0) - error (EXIT_FAILURE, 0, "cannot create thread"); - - pthread_join (th, &res); - - return (int) (long int) res; -} - - -static void * -thread (void *arg) -{ - int status; - pid_t pid; - - pid = fork (); - if (pid == 0) - { - /* We check whether the `prepare' and `child' function ran. */ - exit (var != (PREPARE_BIT | CHILD_BIT)); - } - else if (pid == (pid_t) -1) - error (EXIT_FAILURE, errno, "cannot fork"); - - if (waitpid (pid, &status, 0) != pid) - error (EXIT_FAILURE, errno, "wrong child"); - - if (WTERMSIG (status) != 0) - error (EXIT_FAILURE, 0, "Child terminated incorrectly"); - status = WEXITSTATUS (status); - - if (status == 0) - status = var != (PREPARE_BIT | PARENT_BIT); - - return (void *) (long int) status; -} |