| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * 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_rwlock_timedrdlock(pthread_rwlock_t *rwlock) |
| * |
| * Under no circumstances shall the function fail with a timeout if the lock can be |
| * acquired immediately. The abs_timeout parameter need not be checked if the lock |
| * can be immediately acquired. |
| * |
| * Steps:n |
| * 1. Main thread create a thread. |
| * 2. Child thread lock 'rwlock' for reading with pthread_rwlock_timedrdlock(), |
| * should not fail with timeout |
| * 3. The child thread unlocks the 'rwlock' and exits. |
| * 4. Main thread create another thread. |
| * 4. The child thread lock 'rwlock' for reading, with pthread_rwlock_timedrdlock(), |
| * specifying a 'abs_timeout'. The thread sleeps until 'abs_timeout' expires. |
| * 5. The thread call pthread_rwlock_timedrdlock(). Should _NOT_ get ETIMEDOUT. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include "posixtest.h" |
| |
| #define NOT_CREATED_THREAD 1 |
| #define ENTERED_THREAD 2 |
| #define EXITING_THREAD 3 |
| |
| #define TIMEOUT 1 |
| static int thread_state; |
| static int currsec1; |
| static int expired; |
| |
| static void* fn_rd_1(void *arg) |
| { |
| thread_state = ENTERED_THREAD; |
| struct timespec abs_timeout; |
| int rc; |
| pthread_rwlock_t rwlock; |
| |
| if (pthread_rwlock_init(&rwlock, NULL) != 0) |
| { |
| printf("thread1: Error at pthread_rwlock_init\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| currsec1 = time(NULL); |
| |
| /* Absolute time, not relative. */ |
| abs_timeout.tv_sec = currsec1 + TIMEOUT; |
| abs_timeout.tv_nsec = 0; |
| |
| printf("thread1: attempt timed read-lock\n"); |
| rc = pthread_rwlock_timedrdlock(&rwlock, &abs_timeout); |
| if (rc == ETIMEDOUT) |
| { |
| printf("thread1: timed read-lock expired\n"); |
| expired = 1; |
| } |
| else if (rc == 0) |
| { |
| printf("thread1: acquired read lock\n"); |
| expired = 0; |
| printf("thread1: unlock read lock\n"); |
| if (pthread_rwlock_unlock(&rwlock) != 0) |
| { |
| printf("thread1: failed to release read lock\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| } |
| else |
| { |
| printf("thread1: Error in pthread_rwlock_timedrdlock().\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| if (pthread_rwlock_destroy(&rwlock) != 0) |
| { |
| printf("thread1: Error at pthread_rwlockattr_destroy()"); |
| exit(PTS_UNRESOLVED); |
| } |
| thread_state = EXITING_THREAD; |
| pthread_exit(0); |
| return NULL; |
| } |
| |
| static void* fn_rd_2(void *arg) |
| { |
| thread_state = ENTERED_THREAD; |
| struct timespec abs_timeout; |
| int rc; |
| pthread_rwlock_t rwlock; |
| |
| if (pthread_rwlock_init(&rwlock, NULL) != 0) |
| { |
| printf("thread2: Error at pthread_rwlock_init\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| currsec1 = time(NULL); |
| |
| /* Ensure that the abs_timeout has passed by _subtracting_ the timeout value of 1 |
| * from the current time. */ |
| abs_timeout.tv_sec = currsec1 - TIMEOUT; |
| abs_timeout.tv_nsec = 0; |
| |
| printf("thread2: attempt timed read-lock\n"); |
| rc = pthread_rwlock_timedrdlock(&rwlock, &abs_timeout); |
| if (rc == ETIMEDOUT) |
| { |
| printf("thread2: timed read-lock expired\n"); |
| expired = 1; |
| } |
| else if (rc == 0) |
| { |
| printf("thread2: acquired read lock\n"); |
| expired = 0; |
| printf("thread2: unlock read lock\n"); |
| if (pthread_rwlock_unlock(&rwlock) != 0) |
| { |
| printf("thread2: failed to release read lock\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| } |
| else |
| { |
| printf("thread2: Error in pthread_rwlock_timedrdlock().\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| if (pthread_rwlock_destroy(&rwlock) != 0) |
| { |
| printf("thread2: Error at pthread_rwlockattr_destroy()\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| thread_state = EXITING_THREAD; |
| pthread_exit(0); |
| return NULL; |
| } |
| |
| int main() |
| { |
| int cnt = 0; |
| |
| pthread_t thread1, thread2; |
| |
| thread_state = NOT_CREATED_THREAD; |
| printf("main: create thread1\n"); |
| if (pthread_create(&thread1, NULL, fn_rd_1, NULL) != 0) |
| { |
| printf("Error when creating thread1\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* If the shared data is not altered by child after 5 seconds, |
| we regard it as blocked */ |
| |
| /* we expect thread1 NOT to block, but rather for the timed read-lock to expire */ |
| cnt = 0; |
| do{ |
| sleep(1); |
| }while (thread_state !=EXITING_THREAD && cnt++ < 5); |
| |
| if (thread_state == EXITING_THREAD) |
| { |
| /* the child thread does not block, check the time expired or not */ |
| if (expired == 1) |
| { |
| printf("Test FAILED: thread1 incorrectly received ETIMEDOUT\n"); |
| return PTS_FAIL; |
| } |
| } |
| else if (thread_state == ENTERED_THREAD) |
| { |
| printf("Test FAILED: thread1 incorrectly blocked for reading rwlock\n"); |
| return PTS_FAIL; |
| } |
| else |
| { |
| printf("Unexpected state for thread1 %d\n", thread_state); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (pthread_join(thread1, NULL) != 0) |
| { |
| printf("Error when joining thread1\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("main: create thread2\n"); |
| thread_state = NOT_CREATED_THREAD; |
| if (pthread_create(&thread2, NULL, fn_rd_2, NULL) != 0) |
| { |
| printf("Error when creating thread2\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* If the shared data is not altered by child after 5 seconds, |
| we regard it as blocked */ |
| |
| /* we expect thread2 NOT to block */ |
| cnt = 0; |
| do{ |
| sleep(1); |
| }while (thread_state !=EXITING_THREAD && cnt++ < 5); |
| |
| if (thread_state == EXITING_THREAD) |
| { |
| /* the child thread does not block, check the time expired or not */ |
| if (expired == 1) |
| { |
| printf("Test FAILED: thread2 incorrectly received ETIMEDOUT\n"); |
| return PTS_FAIL; |
| } |
| } |
| else if (thread_state == ENTERED_THREAD) |
| { |
| printf("Test FAILED: thread2 incorrectly blocked for reading rwlock\n"); |
| return PTS_FAIL; |
| } |
| else |
| { |
| printf("Unexpected state for thread2 %d\n", thread_state); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (pthread_join(thread2, NULL) != 0) |
| { |
| printf("Error when join thread2\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |