/*
 *  Copyright (C) NAKAMURA Minoru <nminoru@nminoru.jp>
 */
#include <stdio.h>
#include <sched.h>
#include <pthread.h>

enum {
    THREADS = 2
};

static pthread_t threads[THREADS];
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;


static void* routine(void* p)
{
    int id = (int)p;

    for (;;) {

        pthread_mutex_lock(&mutex);
        printf("Thread-ID: %d\n", id);
        sched_yield();
        pthread_mutex_unlock(&mutex);
    }
}



int main(int argc, char** argv)
{
    int i;

    for (i=0 ; i<THREADS ; i++) {
        if (pthread_create(&threads[i], NULL, routine, (void*)i)) {
            perror("pthread_create"), exit(1);
        }
    }

    for (i=0 ; i<THREADS ; i++) {
        if (pthread_join(threads[i], NULL)) {
            perror("pthread_join"), exit(1);
        }
    }

    return 0;
}