funptr

    (defun insert-key-sequence (key-repr)
      "Reads a literal key sequence from the user
    and inserts a representation of it at point,
    suitable for `global-set-key' or `local-set-key'."
      (interactive "KKey sequence? ")
      (prin1 key-repr (current-buffer))
      (insert " "))
    
    (add-hook 'emacs-lisp-mode-hook 
              #'(lambda () 
                  (local-set-key "\C-ck" #'insert-key-sequence)))
    
    (run-hooks 'emacs-lisp-mode-hook)

  #define for_duration(seconds, body)                     \
    {                                                     \
      pthread_t tid_task, tid_watcher;                    \
                                                          \
      void* task(void* arg) {                             \
        body ;                                            \
        pthread_cancel(tid_watcher);                      \
        return NULL;                                      \
      }                                                   \
                                                          \
      void* watcher(void* arg) {                          \
        sleep((seconds));                                 \
        pthread_cancel(tid_task);                         \
        return NULL;                                      \
      }                                                   \
                                                          \
      pthread_create(&tid_task, NULL, &task, NULL);       \
      pthread_create(&tid_watcher, NULL, &watcher, NULL); \
      pthread_join(tid_task, NULL);                       \
    }                             

  for_duration(10, {
      while (true) {
        printf("Infinite loop! where is your Godel now?\n");
      }
    });
  

  for_duration(10, while (true) printf("something\n") );
  

  int i = 0;
  for_duration(10, {
      while (true) {
        printf("%d\n", i++);
      }
    });

  void with_timeout(unsigned int seconds, void (*func)(void));

  #define for_duration(seconds, body) {			\
    void func() { body ; }				\
    with_timeout((seconds), &func);			\
  }