pthread - 如何在不调用 join 的情况下开始运行新线程

如何在不调用 join 的情况下开始运行新线程？

c
#include 
#include 
void* thread_function(void* arg)
{
    printf("This is a new thread.\n");
    pthread_exit(NULL);
}
int main()
{
    pthread_t thread_id;
    int ret = pthread_create(&thread_id, NULL, thread_function, NULL);
    if (ret != 0) {
        printf("Failed to create a new thread.\n");
        return 1;
    }
    printf("Main thread continues to execute.\n");
    return 0;
}

bash
Main thread continues to execute.
This is a new thread.