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/* Copyright (c) 2002-2025. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
/* Simple test code with no bug */
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <unistd.h>
pthread_mutex_t mutex;
pthread_cond_t cond;
pthread_t thread;
static void* thread_doit(void* unused)
{
// Try twice to get signaled
for (int i = 0; i < 2; i++) {
struct timespec time_to_wait = {time(NULL), 0};
time_to_wait.tv_sec += 1;
printf("Thread: Wait for 1s\n");
pthread_mutex_lock(&mutex);
int res = pthread_cond_timedwait(&cond, &mutex, &time_to_wait);
pthread_mutex_unlock(&mutex);
if (res == 0) {
printf("Thread: got signaled!\n");
} else {
printf("Thread: waiting the signal timeouted!\n");
}
}
return NULL;
}
int main(int argc, char* argv[])
{
if (argc > 1) {
fprintf(stderr, "Usage: %s\n", argv[0]);
return EXIT_FAILURE;
}
if (pthread_mutex_init(&mutex, NULL) != 0) {
printf("Failed to initialize mutex\n");
return EXIT_FAILURE;
}
if (pthread_cond_init(&cond, NULL) != 0) {
printf("Failed to initialize cond\n");
return EXIT_FAILURE;
}
if (pthread_create(&thread, NULL, &thread_doit, NULL) != 0) {
printf("Failed to create thread\n");
return EXIT_FAILURE;
}
printf("main: sleep 5ms\n");
usleep(5 * 1000);
pthread_mutex_lock(&mutex);
printf("main: signal the condition\n");
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
if (pthread_join(thread, NULL) != 0) {
printf("Failed to join thread\n");
return EXIT_FAILURE;
}
pthread_mutex_destroy(&mutex);
pthread_cond_destroy(&cond);
return EXIT_SUCCESS;
}
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