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

using namespace std;


void* ThreadFun(void*)
{
	sleep(5);
}

int main(int argc, char** argv)
{
    if (argc > 1)
    {
        pid_t pid = fork();
        if (pid < 0)
        {
            return 1;
        }
        else if (pid > 0)
        {
            return 0;
        }
    }
    pthread_attr_t t_attr;
    assert(!pthread_attr_init(&t_attr));
    assert(!pthread_attr_setdetachstate(&t_attr, PTHREAD_CREATE_JOINABLE));
    pthread_t thread_handle;
    assert(!pthread_create(&thread_handle, &t_attr, &ThreadFun, 0));	
    assert(!pthread_join(thread_handle, 0));
    return 0;
}