1/* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Created by: bing.wei.liu REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 8 * Test pthread_mutexattr_settype() 9 * 10 * PTHREAD_MUTEX_ERRORCHECK 11 12 * Provides errorchecking. A thread attempting to relock this mutex without unlocking it 13 * first will return with an error. A thread attempting to unlock a mutex which another 14 * thread has locked will return with an error. A thread attempting to unlock an unlocked 15 * mutex will return with an error. 16 * 17 * Steps: 18 * 1. Initialize a pthread_mutexattr_t object with pthread_mutexattr_init() 19 * 2 Set the 'type' of the mutexattr object to PTHREAD_MUTEX_ERRORCHECK. 20 * 3. Create a mutex with that mutexattr object. 21 * 4. Lock the mutex. 22 * 5. Create a thread, and in that thread, attempt to unlock the mutex. It should return an 23 * error. 24 * 25 */ 26 27#define _XOPEN_SOURCE 600 28 29#include <pthread.h> 30#include <stdio.h> 31#include <errno.h> 32#include "posixtest.h" 33 34pthread_t thread1; 35pthread_mutex_t mutex; 36pthread_mutexattr_t mta; 37 38int ret; /* Return value of the thread unlocking the mutex. */ 39 40void *a_thread_func() 41{ 42 /* Try to unlock the mutex that main already locked. */ 43 ret = pthread_mutex_unlock(&mutex); 44 pthread_exit(NULL); 45} 46 47int main(void) 48{ 49 50 /* Initialize a mutex attributes object */ 51 if (pthread_mutexattr_init(&mta) != 0) { 52 perror("Error at pthread_mutexattr_init()\n"); 53 return PTS_UNRESOLVED; 54 } 55 56 /* Set the 'type' attribute to be PTHREAD_MUTEX_ERRORCHECK */ 57 if (pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK) != 0) { 58 printf("Test FAILED: Error setting the attribute 'type'\n"); 59 return PTS_FAIL; 60 } 61 62 /* Initialize the mutex with that attribute obj. */ 63 if (pthread_mutex_init(&mutex, &mta) != 0) { 64 perror("Error intializing the mutex.\n"); 65 return PTS_UNRESOLVED; 66 } 67 68 /* Lock the mutex. */ 69 if (pthread_mutex_lock(&mutex) != 0) { 70 perror("Error locking the mutex first time around.\n"); 71 return PTS_UNRESOLVED; 72 } 73 74 /* Create the thread that will try to unlock the mutex we just locked. */ 75 if (pthread_create(&thread1, NULL, a_thread_func, NULL) != 0) { 76 perror("Error creating a thread.\n"); 77 return PTS_UNRESOLVED; 78 } 79 80 /* Wait for that thread to end execution */ 81 pthread_join(thread1, NULL); 82 83 if (ret == 0) { 84 printf 85 ("Test FAILED: Expected an error when trying to unlock a mutex that was locked by another thread. Returned 0 instead.\n"); 86 return PTS_FAIL; 87 } 88 89 /* cleanup */ 90 pthread_mutex_unlock(&mutex); 91 pthread_mutex_destroy(&mutex); 92 93 if (pthread_mutexattr_destroy(&mta)) { 94 perror("Error at pthread_mutexattr_destory().\n"); 95 return PTS_UNRESOLVED; 96 } 97 98 printf("Test PASSED\n"); 99 return PTS_PASS; 100} 101