yggdrasil/test.c

#include <pthread.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>

static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

static void *thread(void *arg) {
    const char *name = (const char *) arg;
    printf("[%s] wait\n", name);
    pthread_mutex_lock(&mutex);
    pthread_cond_wait(&cond, &mutex);
    pthread_mutex_unlock(&mutex);
    printf("[%s] done\n", name);
    return NULL;
}

int main(int argc, const char **argv) {
    pthread_t handle0, handle1;
    pthread_create(&handle0, NULL, thread, "thread0");
    pthread_create(&handle1, NULL, thread, "thread1");

    sleep(3);

    pthread_mutex_lock(&mutex);
    pthread_cond_broadcast(&cond);
    pthread_mutex_unlock(&mutex);

    pthread_join(handle0, NULL);
    pthread_join(handle1, NULL);
    printf("[main] finished\n");

    return 0;
}