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/*
* 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()
* Upon successful return, the mutex shall have been locked and shall be owned
* by the calling thread.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.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 LTP_ATTRIBUTE_UNUSED)
{
printf("Error: failed to wakeup thread\n");
pthread_cancel(thread1);
exit(PTS_UNRESOLVED);
}
void *t1_func(void *arg LTP_ATTRIBUTE_UNUSED)
{
int rc;
if (pthread_mutex_lock(&td.mutex) != 0) {
fprintf(stderr, "Thread1 failed to acquire the 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");
exit(PTS_UNRESOLVED);
}
if (pthread_mutex_trylock(&td.mutex) == 0) {
fprintf(stderr,
"Thread1 should not be able to lock the mutex again\n");
printf("Test FAILED\n");
exit(PTS_FAIL);
}
fprintf(stderr, "Thread1 failed to trylock the mutex (as expected)\n");
if (pthread_mutex_unlock(&td.mutex) != 0) {
fprintf(stderr, "Thread1 failed to release the mutex\n");
printf("Test FAILED\n");
exit(PTS_FAIL);
}
fprintf(stderr, "Thread1 released the mutex\n");
return NULL;
}
int main(void)
{
struct timespec completion_wait_ts = {0, 100000};
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 */
nanosleep(&completion_wait_ts, NULL);
/* acquire the mutex released by pthread_cond_wait() within thread 1 */
if (pthread_mutex_lock(&td.mutex) != 0) {
fprintf(stderr, "Main failed to acquire mutex\n");
return PTS_UNRESOLVED;
}
if (pthread_mutex_unlock(&td.mutex) != 0) {
fprintf(stderr, "Main failed to release mutex\n");
return PTS_UNRESOLVED;
}
sleep(1);
/* 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 failed to signal the condition\n");
return PTS_UNRESOLVED;
}
pthread_join(thread1, NULL);
printf("Test PASSED\n");
return PTS_PASS;
}
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