| /* |
| * 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_mutex_timedlock() |
| * locks the mutex object referenced by 'mutex'. If the mutex is |
| * already locked, the calling thread shall block until the mutex becomes |
| * available. The wait will end when the specified timeout time has expired. |
| |
| * The timeout expires when the absolute time 'abs_timeout' passes, or if 'abs_timeout' |
| * has already been passed the time of the call. |
| |
| * Steps: |
| * |
| * 1. Create a mutex in the main() thread and lock it. |
| * 2. Create a thread, and call pthread_mutex_timedlock inside of it. It should block for |
| * the set time of (3 secs.). |
| * 3. Save the time before and after the thread tried to lock the mutex. |
| * 4. After the thread has ended, main() will compare the times before and after the mutex |
| * tried to lock in the thread. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| |
| #include <time.h> |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <sys/time.h> |
| #include "posixtest.h" |
| |
| #define TIMEOUT 3 /* 3 seconds of timeout time for |
| pthread_mutex_timedlock(). */ |
| void *f1(void *parm); |
| |
| pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; /* The mutex */ |
| struct timeval currsec1, currsec2; /* Variables for saving time before |
| and after locking the mutex using |
| pthread_mutex_timedlock(). */ |
| /**************************** |
| * |
| * MAIN() |
| * |
| * *************************/ |
| int main() |
| { |
| pthread_t new_th; |
| struct timeval time_diff; |
| |
| /* Lock the mutex. */ |
| if (pthread_mutex_lock(&mutex) != 0) { |
| perror("Error in pthread_mutex_lock().\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Create a thread that will call pthread_mutex_timedlock */ |
| if (pthread_create(&new_th, NULL, f1, NULL) != 0) { |
| perror("Error in pthread_create().\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Wait for thread to end. */ |
| if (pthread_join(new_th, NULL) != 0) { |
| perror("Error in pthread_join().\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Cleaning up the mutexes. */ |
| if (pthread_mutex_unlock(&mutex) != 0) { |
| perror("Error in pthread_mutex_unlock().\n"); |
| return PTS_UNRESOLVED; |
| } |
| if (pthread_mutex_destroy(&mutex) != 0) { |
| perror("Error in pthread_mutex_destroy().\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Compare time before the mutex locked and after the mutex lock timed out. */ |
| time_diff.tv_sec = currsec2.tv_sec - currsec1.tv_sec; |
| time_diff.tv_usec = currsec2.tv_usec - currsec1.tv_usec; |
| if (time_diff.tv_usec < 0) { |
| --time_diff.tv_sec; |
| time_diff.tv_usec += 1000000; |
| } |
| if (time_diff.tv_sec < TIMEOUT) { |
| printf |
| ("Test FAILED: Timed lock did not wait long enough. (%d secs.)\n", |
| TIMEOUT); |
| printf |
| ("time before mutex locked: %ld.%06ld, time after mutex timed out: %ld.%06ld.\n", |
| (long)currsec1.tv_sec, (long)currsec1.tv_usec, |
| (long)currsec2.tv_sec, (long)currsec2.tv_usec); |
| return PTS_FAIL; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |
| |
| /**************************** |
| * |
| * Thread's start routine. |
| * f1() |
| * |
| * *************************/ |
| void *f1(void *parm) |
| { |
| struct timespec timeout; |
| |
| /* Get the current time before the mutex locked. */ |
| gettimeofday(&currsec1, NULL); |
| |
| /* Absolute time, not relative. */ |
| timeout.tv_sec = currsec1.tv_sec + TIMEOUT; |
| timeout.tv_nsec = currsec1.tv_usec * 1000; |
| |
| printf |
| ("Timed mutex lock will block for %d seconds starting from: %ld.%06ld\n", |
| TIMEOUT, (long)currsec1.tv_sec, (long)currsec1.tv_usec); |
| if (pthread_mutex_timedlock(&mutex, &timeout) != ETIMEDOUT) { |
| perror("Error in pthread_mutex_timedlock().\n"); |
| pthread_exit((void *)PTS_UNRESOLVED); |
| return (void *)PTS_UNRESOLVED; |
| } |
| |
| /* Get time after the mutex timed out in locking. */ |
| gettimeofday(&currsec2, NULL); |
| |
| pthread_exit(0); |
| return (void *)(0); |
| } |