/* Copyright (C) 2002, 2003, 2004 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, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/mman.h> #include <sys/wait.h> int *condition; static int do_test (void) { size_t ps = sysconf (_SC_PAGESIZE); char tmpfname[] = "/tmp/tst-cond4.XXXXXX"; char data[ps]; void *mem; int fd; pthread_mutexattr_t ma; pthread_mutex_t *mut1; pthread_mutex_t *mut2; pthread_condattr_t ca; pthread_cond_t *cond; pid_t pid; int result = 0; int p; fd = mkstemp (tmpfname); if (fd == -1) { printf ("cannot open temporary file: %m\n"); return 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) != (ssize_t) ps) { puts ("short write"); return 1; } mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (mem == MAP_FAILED) { printf ("mmap failed: %m\n"); return 1; } mut1 = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t)) & ~(__alignof (pthread_mutex_t) - 1)); mut2 = mut1 + 1; cond = (pthread_cond_t *) (((uintptr_t) (mut2 + 1) + __alignof (pthread_cond_t)) & ~(__alignof (pthread_cond_t) - 1)); condition = (int *) (((uintptr_t) (cond + 1) + __alignof (int)) & ~(__alignof (int) - 1)); if (pthread_mutexattr_init (&ma) != 0) { puts ("mutexattr_init failed"); return 1; } if (pthread_mutexattr_getpshared (&ma, &p) != 0) { puts ("1st mutexattr_getpshared failed"); return 1; } if (p != PTHREAD_PROCESS_PRIVATE) { puts ("default pshared value wrong"); return 1; } if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0) { puts ("mutexattr_setpshared failed"); return 1; } if (pthread_mutexattr_getpshared (&ma, &p) != 0) { puts ("2nd mutexattr_getpshared failed"); return 1; } if (p != PTHREAD_PROCESS_SHARED) { puts ("pshared value after setpshared call wrong"); return 1; } if (pthread_mutex_init (mut1, &ma) != 0) { puts ("1st mutex_init failed"); return 1; } if (pthread_mutex_init (mut2, &ma) != 0) { puts ("2nd mutex_init failed"); return 1; } if (pthread_condattr_init (&ca) != 0) { puts ("condattr_init failed"); return 1; } if (pthread_condattr_getpshared (&ca, &p) != 0) { puts ("1st condattr_getpshared failed"); return 1; } if (p != PTHREAD_PROCESS_PRIVATE) { puts ("default value for pshared in condattr wrong"); return 1; } if (pthread_condattr_setpshared (&ca, PTHREAD_PROCESS_SHARED) != 0) { puts ("condattr_setpshared failed"); return 1; } if (pthread_condattr_getpshared (&ca, &p) != 0) { puts ("2nd condattr_getpshared failed"); return 1; } if (p != PTHREAD_PROCESS_SHARED) { puts ("pshared condattr still not set"); return 1; } if (pthread_cond_init (cond, &ca) != 0) { puts ("cond_init failed"); return 1; } if (pthread_mutex_lock (mut1) != 0) { puts ("parent: 1st mutex_lock failed"); return 1; } puts ("going to fork now"); pid = fork (); if (pid == -1) { puts ("fork failed"); return 1; } else if (pid == 0) { if (pthread_mutex_lock (mut2) != 0) { puts ("child: mutex_lock failed"); return 1; } if (pthread_mutex_unlock (mut1) != 0) { puts ("child: 1st mutex_unlock failed"); return 1; } do if (pthread_cond_wait (cond, mut2) != 0) { puts ("child: cond_wait failed"); return 1; } while (*condition == 0); if (pthread_mutex_unlock (mut2) != 0) { puts ("child: 2nd mutex_unlock failed"); return 1; } puts ("child done"); } else { int status; if (pthread_mutex_lock (mut1) != 0) { puts ("parent: 2nd mutex_lock failed"); return 1; } if (pthread_mutex_lock (mut2) != 0) { puts ("parent: 3rd mutex_lock failed"); return 1; } if (pthread_cond_signal (cond) != 0) { puts ("parent: cond_signal failed"); return 1; } *condition = 1; if (pthread_mutex_unlock (mut2) != 0) { puts ("parent: mutex_unlock failed"); return 1; } puts ("waiting for child"); waitpid (pid, &status, 0); result |= status; puts ("parent done"); } return result; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"