| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * Created by: bing.wei.liu REMOVE-THIS AT intel DOT com |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| |
| * Test that pthread_mutexattr_setpshared() |
| * |
| * It shall set the process-shared attribute in an initialized attributes object 'attr'. |
| |
| * The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit a mutex to be |
| * operated upon by any thread that has access to the memory where the mutex is allocated, |
| * even if the mutex is allocated in memory that is shared by multiple processes. |
| * |
| * If the process-shared attribute is PTHREAD_PROCESS_PRIVATE, the mutex shall only be |
| * operated upon by threads created within the same process as the thread that initialized |
| * the mutex; if threads of differing processes attempt to operate on such a mutex, |
| * the behavior is undefined. |
| * |
| * Steps: |
| * |
| * Explanation: To share a mutex between 2 processes, you need to map shared memory for |
| * the mutex. So whether the 'type' of the mutexattr is shared or private, it really will |
| * not make a difference since both processes will always have access to the shared memory |
| * as long as they the pointer to it. So all we check here is that you can actually call |
| * the pthread_mutexattr_setpshared() function, passing to it PTHREAD_PROCESS_SHARED and |
| * PTHREAD_PROCESS_PRIVATE. |
| * |
| * 1. Initialize a pthread_mutexattr_t object. |
| * 2. Call pthread_mutexattr_getpshared(), passing to it both PTHREAD_PROCESS_SHARE and |
| * PTHREAD_PROCESS_PRIVATE. |
| * |
| */ |
| |
| #include <pthread.h> |
| #include <stdio.h> |
| #include "posixtest.h" |
| |
| pthread_mutex_t new_mutex; /* The mutex. */ |
| |
| int main() |
| { |
| pthread_mutexattr_t mta; |
| int ret; |
| |
| /* Initialize a mutex attributes object */ |
| if (pthread_mutexattr_init(&mta) != 0) { |
| perror("Error at pthread_mutexattr_init()\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Set the 'pshared' attribute to PTHREAD_PROCESS_PRIVATE */ |
| if ((ret = |
| pthread_mutexattr_setpshared(&mta, |
| PTHREAD_PROCESS_PRIVATE)) != 0) { |
| printf |
| ("Test FAILED: Cannot set pshared attribute to PTHREAD_PROCESS_PRIVATE. Error: %d\n", |
| ret); |
| return PTS_FAIL; |
| } |
| |
| /* Set the 'pshared' attribute to PTHREAD_PROCESS_SHARED */ |
| if ((ret = |
| pthread_mutexattr_setpshared(&mta, PTHREAD_PROCESS_SHARED)) != 0) { |
| printf |
| ("Test FAILED: Cannot set pshared attribute to PTHREAD_PROCESS_SHARED. Error code: %d\n", |
| ret); |
| return PTS_FAIL; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |