| /* |
| * 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_cond_wait() |
| * shall block on a condition variable. It shall be called with mutex locked |
| * by the calling thread or undefined behavior results. |
| */ |
| |
| |
| #include <pthread.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <signal.h> |
| #include "posixtest.h" |
| |
| struct testdata { |
| pthread_mutex_t mutex; |
| pthread_cond_t cond; |
| } td; |
| |
| pthread_t thread1; |
| |
| int t1_start = 0; |
| int signaled = 0; |
| |
| /* Alarm handler */ |
| void alarm_handler(int signo) |
| { |
| printf("Error: failed to wakeup thread\n"); |
| pthread_cancel(thread1); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| void *t1_func(void *arg) |
| { |
| int rc; |
| |
| if (pthread_mutex_lock(&td.mutex) != 0) { |
| fprintf(stderr, "Thread1 failed to acquire mutex\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| fprintf(stderr, "Thread1 started\n"); |
| t1_start = 1; /* let main thread continue */ |
| |
| fprintf(stderr, "Thread1 is waiting for the cond\n"); |
| rc = pthread_cond_wait(&td.cond, &td.mutex); |
| if (rc != 0) { |
| fprintf(stderr, "pthread_cond_wait return %d\n", rc); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| fprintf(stderr, "Thread1 wakened\n"); |
| if (signaled == 0) { |
| fprintf(stderr, "Thread1 did not block on the cond at all\n"); |
| printf("Test FAILED\n"); |
| exit(PTS_FAIL); |
| } |
| pthread_mutex_unlock(&td.mutex); |
| return NULL; |
| } |
| |
| int main(void) |
| { |
| struct sigaction act; |
| |
| if (pthread_mutex_init(&td.mutex, NULL) != 0) { |
| fprintf(stderr, "Fail to initialize mutex\n"); |
| return PTS_UNRESOLVED; |
| } |
| if (pthread_cond_init(&td.cond, NULL) != 0) { |
| fprintf(stderr, "Fail to initialize cond\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (pthread_create(&thread1, NULL, t1_func, NULL) != 0) { |
| fprintf(stderr, "Fail to create thread 1\n"); |
| return PTS_UNRESOLVED; |
| } |
| while (!t1_start) /* wait for thread1 started */ |
| usleep(100); |
| |
| /* acquire the mutex released by pthread_cond_wait() within thread 1 */ |
| if (pthread_mutex_lock(&td.mutex) != 0) { |
| fprintf(stderr, "Main: Fail to acquire mutex\n"); |
| return PTS_UNRESOLVED; |
| } |
| if (pthread_mutex_unlock(&td.mutex) != 0) { |
| fprintf(stderr, "Main: Fail to release mutex\n"); |
| return PTS_UNRESOLVED; |
| } |
| sleep(2); |
| |
| /* Setup alarm handler */ |
| act.sa_handler = alarm_handler; |
| act.sa_flags = 0; |
| sigemptyset(&act.sa_mask); |
| sigaction(SIGALRM, &act, 0); |
| alarm(5); |
| |
| fprintf(stderr, "Time to wake up thread1 by signaling a condition\n"); |
| signaled = 1; |
| if (pthread_cond_signal(&td.cond) != 0) { |
| fprintf(stderr, "Main: Fail to signal cond\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| pthread_join(thread1, NULL); |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |