| /* |
| * Copyright (c) 2005, Bull S.A.. All rights reserved. |
| * Created by: Sebastien Decugis |
| |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., 59 |
| * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| |
| * This sample test aims to check the following assertion: |
| * |
| * When the semaphore is referenced by other processes, the function has |
| * no effect on the state of the semaphore. |
| |
| * The steps are: |
| * -> Create a named semaphore |
| * -> create a thread which waits on the semaphore |
| * -> unlink the semaphore |
| * -> check the thread did not return |
| * -> post the semaphore |
| * -> check the thread returned |
| * -> close the semaphore |
| |
| * The test fails if the semaphore state is changed by sem_unlink. |
| |
| */ |
| |
| /******************************************************************************/ |
| /*************************** standard includes ********************************/ |
| /******************************************************************************/ |
| #include <pthread.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <semaphore.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| |
| /******************************************************************************/ |
| /*************************** Test framework *******************************/ |
| /******************************************************************************/ |
| #include "../testfrmw/testfrmw.h" |
| #include "../testfrmw/testfrmw.c" |
| /* This header is responsible for defining the following macros: |
| * UNRESOLVED(ret, descr); |
| * where descr is a description of the error and ret is an int |
| * (error code for example) |
| * FAILED(descr); |
| * where descr is a short text saying why the test has failed. |
| * PASSED(); |
| * No parameter. |
| * |
| * Both three macros shall terminate the calling process. |
| * The testcase shall not terminate in any other maneer. |
| * |
| * The other file defines the functions |
| * void output_init() |
| * void output(char * string, ...) |
| * |
| * Those may be used to output information. |
| */ |
| |
| /******************************************************************************/ |
| /**************************** Configuration ***********************************/ |
| /******************************************************************************/ |
| #ifndef VERBOSE |
| #define VERBOSE 1 |
| #endif |
| |
| #define SEM_NAME "/sem_unlink_9_1" |
| |
| /******************************************************************************/ |
| /*************************** Test case ***********************************/ |
| /******************************************************************************/ |
| int thread_state = 0; |
| |
| void * threaded (void * arg) |
| { |
| int ret; |
| thread_state = 1; |
| |
| do |
| { |
| ret = sem_wait(arg); |
| } |
| while (ret != 0 && errno == EINTR); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(errno, "Failed to wait for the semaphore"); |
| } |
| |
| thread_state = 2; |
| return NULL; |
| } |
| |
| /* The main test function. */ |
| int main(int argc, char * argv[]) |
| { |
| int ret; |
| pthread_t child; |
| sem_t * sem; |
| |
| /* Initialize output */ |
| output_init(); |
| |
| /* Create the semaphore */ |
| sem = sem_open(SEM_NAME, O_CREAT | O_EXCL, 0777, 0); |
| |
| if ((sem == SEM_FAILED) && (errno == EEXIST)) |
| { |
| sem_unlink(SEM_NAME); |
| sem = sem_open(SEM_NAME, O_CREAT | O_EXCL, 0777, 0); |
| } |
| |
| if (sem == SEM_FAILED) |
| { |
| UNRESOLVED(errno, "Failed to create the semaphore"); |
| } |
| |
| /* Create the child */ |
| ret = pthread_create(&child, NULL, threaded, sem); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(ret, "Failed to create the thread"); |
| } |
| |
| /* Wait for the child to be waiting. */ |
| while (thread_state != 1) |
| { |
| sched_yield(); |
| } |
| |
| /* Unlink */ |
| ret = sem_unlink(SEM_NAME); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(errno, "Failed to unlink the semaphore"); |
| } |
| |
| /* Check the semaphore state did not change. */ |
| sleep(1); |
| |
| if (thread_state != 1) |
| { |
| FAILED("sem_unlink made sem_wait thread return"); |
| } |
| |
| /* Post the semaphore */ |
| ret = sem_post(sem); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(errno, "Failed to post the semaphore"); |
| } |
| |
| /* Join the thread */ |
| ret = pthread_join(child, NULL); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(ret, "Failed to join the thread"); |
| } |
| |
| /* Now, we can destroy all */ |
| ret = sem_close(sem); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(errno, "Failed to close the semaphore"); |
| } |
| |
| /* Test passed */ |
| #if VERBOSE > 0 |
| output("Test passed\n"); |
| |
| #endif |
| PASSED; |
| } |