yggdrasil/test.c

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

_Thread_local int x = 123;

static void *function(void *arg) {
    printf("This is thread %u\n", pthread_self());
    printf("argument: %s\n", (const char *) arg);
    printf("[child] x = %d\n", x);
    x += 1;
    printf("[child] x = %d\n", x);
    return NULL;
}

int main(int argc, const char **argv) {
    pthread_t thread;
    printf("[main] &x = %p\n", &x);
    printf("[main] x = %d\n", x);
    x = 321;
    printf("[main] x = %d\n", x);

    assert(pthread_create(&thread, NULL, function, (void *) "thread1") == 0);

    pthread_join(thread, NULL);

    return 0;
}