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 that pthread_mutex_trylock() 9 * Upon succesful completion, it shall return a 0 10 * 11 */ 12 13 #include <pthread.h> 14 #include <stdio.h> 15 #include <errno.h> 16 #include "posixtest.h" 17 18 int main(void) 19 { 20 pthread_mutex_t mutex; 21 int rc; 22 23 /* Initialize a mutex object with the default mutex attributes */ 24 if ((rc = pthread_mutex_init(&mutex, NULL)) != 0) { 25 fprintf(stderr, "Error at pthread_mutex_init(), rc=%d\n", rc); 26 return PTS_UNRESOLVED; 27 } 28 29 /* Try to lock the mutex using pthread_mutex_trylock() */ 30 if ((rc = pthread_mutex_trylock(&mutex)) == 0) { 31 pthread_mutex_unlock(&mutex); 32 printf("Test PASSED\n"); 33 return PTS_PASS; 34 } 35 36 /* Check if returned values are tolerable */ 37 /* PATCH: since we are using the mutex properly, */ 38 /* errors are NOT tolerable here */ 39 else if (rc == EBUSY) { 40 fprintf(stderr, "The mutex was already locked\n"); 41 } else if (rc == EINVAL) { 42 fprintf(stderr, "Invalid mutex object\n"); 43 } else if (rc == EAGAIN) { 44 fprintf(stderr, 45 "The maximum number of recursive locks has been exceeded\n"); 46 } 47 48 /* Any other returned value means the test failed */ 49 printf("Test FAILED\n"); 50 return PTS_FAIL; 51 } 52
