12c28215423293e443469a07ae7011135d058b671Garrett Cooper/* 20dc076565f772bb1953209fb69ea150b494aaa40robbiew * Copyright (c) 2002, Intel Corporation. All rights reserved. 30dc076565f772bb1953209fb69ea150b494aaa40robbiew * This file is licensed under the GPL license. For the full content 42c28215423293e443469a07ae7011135d058b671Garrett Cooper * of this license, see the COPYING file at the top level of this 50dc076565f772bb1953209fb69ea150b494aaa40robbiew * source tree. 60dc076565f772bb1953209fb69ea150b494aaa40robbiew * Test pthread_rwlock_timedrdlock(pthread_rwlock_t * rwlock) 72c28215423293e443469a07ae7011135d058b671Garrett Cooper * 82c28215423293e443469a07ae7011135d058b671Garrett Cooper * If a signal that causes a signal handler to be executed is delivered to 9e9410dfd93b8e415ecbe3f7e09a085462b27836eGarrett Cooper * a thread blocked on a read-write lock via a call to pthread_rwlock_timedrdlock(), 102c28215423293e443469a07ae7011135d058b671Garrett Cooper * upon return from the signal handler the thread shall resume waiting for the lock 110dc076565f772bb1953209fb69ea150b494aaa40robbiew * as if it was not interrupted. 120dc076565f772bb1953209fb69ea150b494aaa40robbiew * 130dc076565f772bb1953209fb69ea150b494aaa40robbiew * Steps: 140dc076565f772bb1953209fb69ea150b494aaa40robbiew * 1. main thread create read-write lock 'rwlock', and lock it for writing 150dc076565f772bb1953209fb69ea150b494aaa40robbiew * 2. main thread create a thread sig_thread, the thread is set to handle SIGUSR1 160dc076565f772bb1953209fb69ea150b494aaa40robbiew * 3. sig_thread timed lock 'rwlock' for reading, but blocked 172c28215423293e443469a07ae7011135d058b671Garrett Cooper * 4. While the sig_thread is waiting(not expried yet), main thread send SIGUSR1 180dc076565f772bb1953209fb69ea150b494aaa40robbiew * to sig_thread via pthread_kill 190dc076565f772bb1953209fb69ea150b494aaa40robbiew * 5. test that thread handler is called, inside the handler, make the thread sleep 202c28215423293e443469a07ae7011135d058b671Garrett Cooper * for a period that the specified 'timeout' for pthread_rwlock_timedrdlock() 212c28215423293e443469a07ae7011135d058b671Garrett Cooper * should have expired (timeout * 2) 222c28215423293e443469a07ae7011135d058b671Garrett Cooper * 6. While sig_thread sleeping in signal handler, main thread unlock 'rwlock' 232c28215423293e443469a07ae7011135d058b671Garrett Cooper * 7. check that when thread handler returns, sig_thread get the read lock without 240dc076565f772bb1953209fb69ea150b494aaa40robbiew * getting ETIMEDOUT. 250dc076565f772bb1953209fb69ea150b494aaa40robbiew */ 260dc076565f772bb1953209fb69ea150b494aaa40robbiew 270dc076565f772bb1953209fb69ea150b494aaa40robbiew#define _XOPEN_SOURCE 600 280dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <pthread.h> 290dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <stdio.h> 300dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <stdlib.h> 310dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <signal.h> 320dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <errno.h> 330dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <unistd.h> 340dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <time.h> 350dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <sys/time.h> 360dc076565f772bb1953209fb69ea150b494aaa40robbiew#include "posixtest.h" 370dc076565f772bb1953209fb69ea150b494aaa40robbiew 382c28215423293e443469a07ae7011135d058b671Garrett Cooper/* thread_state indicates child thread state: 392c28215423293e443469a07ae7011135d058b671Garrett Cooper 1: not in child thread yet; 400dc076565f772bb1953209fb69ea150b494aaa40robbiew 2: just enter child thread ; 410dc076565f772bb1953209fb69ea150b494aaa40robbiew 3: just before child thread exit; 420dc076565f772bb1953209fb69ea150b494aaa40robbiew*/ 430dc076565f772bb1953209fb69ea150b494aaa40robbiew 440dc076565f772bb1953209fb69ea150b494aaa40robbiew#define NOT_CREATED_THREAD 1 450dc076565f772bb1953209fb69ea150b494aaa40robbiew#define ENTERED_THREAD 2 460dc076565f772bb1953209fb69ea150b494aaa40robbiew#define EXITING_THREAD 3 470dc076565f772bb1953209fb69ea150b494aaa40robbiew 480dc076565f772bb1953209fb69ea150b494aaa40robbiew#define TIMEOUT 2 490dc076565f772bb1953209fb69ea150b494aaa40robbiew 500dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic pthread_t sig_thread; 510dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic pthread_rwlock_t rwlock; 520dc076565f772bb1953209fb69ea150b494aaa40robbiew 530dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int thread_state; 540dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int handler_state; 550dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int expired; 560dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic struct timeval before_wait, after_wait; 570dc076565f772bb1953209fb69ea150b494aaa40robbiew 58354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gaostatic void sig_handler() 59354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao{ 600dc076565f772bb1953209fb69ea150b494aaa40robbiew 610dc076565f772bb1953209fb69ea150b494aaa40robbiew struct timespec sleep_time_req; 622c28215423293e443469a07ae7011135d058b671Garrett Cooper 63354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao sleep_time_req.tv_sec = TIMEOUT * 2; 640dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep_time_req.tv_nsec = 0; 652c28215423293e443469a07ae7011135d058b671Garrett Cooper 66354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_equal(pthread_self(), sig_thread)) { 670dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("sig_handler: signal is handled by thread\n"); 680dc076565f772bb1953209fb69ea150b494aaa40robbiew /* sig_handler will not sleep 2 times more than the timeout for the 690dc076565f772bb1953209fb69ea150b494aaa40robbiew * pthread_rwlock_timerdlock is waiting for */ 70354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao printf("sig_handler: sleeping for %d seconds\n", 71354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao (int)sleep_time_req.tv_sec); 720dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 2; 730dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep((int)sleep_time_req.tv_sec); 74354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } else { 750dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("sig_handler: signal is not handled by thread\n"); 760dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 770dc076565f772bb1953209fb69ea150b494aaa40robbiew } 780dc076565f772bb1953209fb69ea150b494aaa40robbiew 790dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 3; 800dc076565f772bb1953209fb69ea150b494aaa40robbiew} 810dc076565f772bb1953209fb69ea150b494aaa40robbiew 82354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gaostatic void *th_fn(void *arg) 830dc076565f772bb1953209fb69ea150b494aaa40robbiew{ 840dc076565f772bb1953209fb69ea150b494aaa40robbiew struct sigaction act; 850dc076565f772bb1953209fb69ea150b494aaa40robbiew struct timespec abs_timeout; 860dc076565f772bb1953209fb69ea150b494aaa40robbiew int rc; 870dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 2; 880dc076565f772bb1953209fb69ea150b494aaa40robbiew expired = 0; 890dc076565f772bb1953209fb69ea150b494aaa40robbiew 900dc076565f772bb1953209fb69ea150b494aaa40robbiew /* Set up handler for SIGUSR1 */ 912c28215423293e443469a07ae7011135d058b671Garrett Cooper 920dc076565f772bb1953209fb69ea150b494aaa40robbiew act.sa_flags = 0; 930dc076565f772bb1953209fb69ea150b494aaa40robbiew act.sa_handler = sig_handler; 940dc076565f772bb1953209fb69ea150b494aaa40robbiew /* block all the signal when hanlding SIGUSR1 */ 950dc076565f772bb1953209fb69ea150b494aaa40robbiew sigfillset(&act.sa_mask); 960dc076565f772bb1953209fb69ea150b494aaa40robbiew sigaction(SIGUSR1, &act, 0); 972c28215423293e443469a07ae7011135d058b671Garrett Cooper 980dc076565f772bb1953209fb69ea150b494aaa40robbiew gettimeofday(&before_wait, NULL); 990dc076565f772bb1953209fb69ea150b494aaa40robbiew abs_timeout.tv_sec = before_wait.tv_sec + TIMEOUT; 1000dc076565f772bb1953209fb69ea150b494aaa40robbiew abs_timeout.tv_nsec = before_wait.tv_usec * 1000; 1012c28215423293e443469a07ae7011135d058b671Garrett Cooper 1020dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = ENTERED_THREAD; 1032c28215423293e443469a07ae7011135d058b671Garrett Cooper 1040dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: attempt timed read lock, %d seconds\n", TIMEOUT); 1050dc076565f772bb1953209fb69ea150b494aaa40robbiew rc = pthread_rwlock_timedrdlock(&rwlock, &abs_timeout); 106354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (rc == 0) { 1070dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: correctly acquired read lock\n"); 1082c28215423293e443469a07ae7011135d058b671Garrett Cooper expired = 0; 109354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } else if (rc == ETIMEDOUT) { 1100dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: timer expired, did not acquire read lock"); 1110dc076565f772bb1953209fb69ea150b494aaa40robbiew expired = 1; 112354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } else { 1130dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_timedrdlock()"); 1140dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1150dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1160dc076565f772bb1953209fb69ea150b494aaa40robbiew 1170dc076565f772bb1953209fb69ea150b494aaa40robbiew gettimeofday(&after_wait, NULL); 1180dc076565f772bb1953209fb69ea150b494aaa40robbiew 1190dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = EXITING_THREAD; 1200dc076565f772bb1953209fb69ea150b494aaa40robbiew pthread_exit(0); 1210dc076565f772bb1953209fb69ea150b494aaa40robbiew return NULL; 1220dc076565f772bb1953209fb69ea150b494aaa40robbiew} 1230dc076565f772bb1953209fb69ea150b494aaa40robbiew 1244ca2bbdcd3003f3c8df4e6129e9c7b2bd1514f87Cyril Hrubisint main(void) 1250dc076565f772bb1953209fb69ea150b494aaa40robbiew{ 1260dc076565f772bb1953209fb69ea150b494aaa40robbiew int cnt; 1270dc076565f772bb1953209fb69ea150b494aaa40robbiew 128354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_rwlock_init(&rwlock, NULL) != 0) { 1290dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_init()\n"); 1300dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1310dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1322c28215423293e443469a07ae7011135d058b671Garrett Cooper 1330dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: attempt write lock\n"); 134354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_rwlock_wrlock(&rwlock) != 0) { 1350dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("pthread_rwlock_wrlock()\n"); 1360dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1370dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1380dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: acquired write lock\n"); 1390dc076565f772bb1953209fb69ea150b494aaa40robbiew 1400dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = NOT_CREATED_THREAD; 141354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_create(&sig_thread, NULL, th_fn, NULL) != 0) { 1420dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_create()\n"); 1430dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1440dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1450dc076565f772bb1953209fb69ea150b494aaa40robbiew 1462c28215423293e443469a07ae7011135d058b671Garrett Cooper /* wait for the thread to get ready for handling signal */ 1470dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 148354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao do { 1490dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(1); 150354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } while (thread_state != ENTERED_THREAD && cnt++ < TIMEOUT); 1512c28215423293e443469a07ae7011135d058b671Garrett Cooper 152354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (thread_state != ENTERED_THREAD) { 1530dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: thread did not block when getting read lock\n"); 1540dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1550dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1560dc076565f772bb1953209fb69ea150b494aaa40robbiew 1570dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: fire SIGUSR1 to thread\n"); 158354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_kill(sig_thread, SIGUSR1) != 0) { 1590dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error in pthread_kill()"); 1600dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1610dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1622c28215423293e443469a07ae7011135d058b671Garrett Cooper 1630dc076565f772bb1953209fb69ea150b494aaa40robbiew /* Wait for signal handler to sleep so that main can unlock the rwlock while 1640dc076565f772bb1953209fb69ea150b494aaa40robbiew * it is sleeping. (this way, the rwlock will be unlocked when the signal handler 1650dc076565f772bb1953209fb69ea150b494aaa40robbiew * returns, and control is given back to the thread) */ 1660dc076565f772bb1953209fb69ea150b494aaa40robbiew 1670dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 168354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao do { 1690dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(TIMEOUT); 170354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } while (handler_state != 2 && cnt++ < 2); 1710dc076565f772bb1953209fb69ea150b494aaa40robbiew 172354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (handler_state == 1) { 1730dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: signal handler did not get called\n"); 1740dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 175354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } else if (handler_state == 3) { 1760dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: signal handler incorrectly exited\n"); 1772c28215423293e443469a07ae7011135d058b671Garrett Cooper exit(PTS_UNRESOLVED); 1780dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1790dc076565f772bb1953209fb69ea150b494aaa40robbiew 180354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (expired == 1) { 1810dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: thread timeout in sig_handler\n"); 1820dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1830dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1840dc076565f772bb1953209fb69ea150b494aaa40robbiew 1850dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: unlock write lock\n"); 186354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_rwlock_unlock(&rwlock) != 0) { 1870dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_unlock()\n"); 1880dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1890dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1902c28215423293e443469a07ae7011135d058b671Garrett Cooper 1910dc076565f772bb1953209fb69ea150b494aaa40robbiew /* wait at most 4*TIMEOUT seconds for thread to exit */ 1920dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 193354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao do { 1940dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(1); 195354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao } while (thread_state != EXITING_THREAD && cnt++ < 4 * TIMEOUT); 1962c28215423293e443469a07ae7011135d058b671Garrett Cooper 197354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (cnt >= 4 * TIMEOUT) { 198354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao /* thread blocked */ 199354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao printf 200354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao ("Test FAILED: thread blocked even afer the abs_timeout expires\n"); 2012c28215423293e443469a07ae7011135d058b671Garrett Cooper exit(PTS_FAIL); 2020dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2032c28215423293e443469a07ae7011135d058b671Garrett Cooper 204354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (expired == 1) { 2050dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test FAILED: thread should get the read lock\n"); 2060dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_FAIL); 2070dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2082c28215423293e443469a07ae7011135d058b671Garrett Cooper 209354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_join(sig_thread, NULL) != 0) { 2100dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_join()"); 2110dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 2120dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2132c28215423293e443469a07ae7011135d058b671Garrett Cooper 214354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao if (pthread_rwlock_destroy(&rwlock) != 0) { 2150dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_destroy()"); 2160dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 2170dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2182c28215423293e443469a07ae7011135d058b671Garrett Cooper 2190dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test PASSED\n"); 2202c28215423293e443469a07ae7011135d058b671Garrett Cooper return PTS_PASS; 221ec6edca7aa42b6affd989ef91b5897f96795e40fChris Dearman} 222