| /* |
| * 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 pthread_rwlock_init(). |
| * |
| * If attr is NULL, the default read-write lock attributes shall be used; |
| * the effect is the same as passing the address of a default read-write |
| * lock attributes object. |
| * |
| * Steps: |
| * 1. Initialize a pthread_rwlock_t object 'rwlock' with pthread_rwlock_init(), |
| * set 'attr' as NULL. |
| * 2. Create a child thread, the thread lock 'rwlock' for reading, shall not block. |
| */ |
| #define _XOPEN_SOURCE 600 |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include "posixtest.h" |
| |
| static pthread_rwlock_t rwlock; |
| static int thread_state; |
| |
| static void* fn_rd(void *arg) |
| { |
| |
| thread_state = 2; |
| int rc; |
| |
| printf("child: lock for reading\n"); |
| rc = pthread_rwlock_rdlock(&rwlock); |
| if (rc == 0) |
| { |
| printf("child: get read lock\n"); |
| printf("child: unlock\n"); |
| if (pthread_rwlock_unlock(&rwlock) != 0) |
| { |
| printf("child: release read lock\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| } |
| else |
| { |
| printf("Error in pthread_rwlock_rdlock().\n"); |
| exit(PTS_FAIL); |
| } |
| |
| thread_state = 3; |
| pthread_exit(0); |
| return NULL; |
| } |
| |
| int main() |
| { |
| int cnt = 0; |
| int rc = 0; |
| |
| pthread_t thread; |
| |
| rc = pthread_rwlock_init(&rwlock, NULL); |
| if (rc != 0) |
| { |
| printf("Test FAILED: Error at pthread_rwlock_init(), returns %d\n", rc); |
| return PTS_FAIL; |
| } |
| |
| thread_state = 1; |
| printf("main: create thread\n"); |
| if (pthread_create(&thread, NULL, fn_rd, NULL) != 0) |
| { |
| printf("main: failed to create thread\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* If the shared data is not altered by child after 3 seconds, |
| we regard it as blocked */ |
| /* We expect the thread not to block*/ |
| cnt = 0; |
| do{ |
| sleep(1); |
| }while (thread_state !=3 && cnt++ < 3); |
| |
| if (thread_state == 2) |
| { |
| printf("Test FAILED: thread blocked on read lock\n"); |
| exit(PTS_FAIL); |
| } |
| else if (thread_state != 3) |
| { |
| printf("main: Unexpected thread state\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| if (pthread_join(thread, NULL) != 0) |
| { |
| printf("main: Error at pthread_join()\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| if (pthread_rwlock_destroy(&rwlock) != 0) |
| { |
| printf("Error at pthread_rwlock_destroy()\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |