Possible to define a function-like macro with a variable body?

Question

I\'ve been looking at the GCC docs for defining macros and it looks like what I want isn\'t possible, but I figure if it is, someone here would know.

What I want to

Answer 1

This was the best I came up with:

#define synchronized(x, things) \
      do { \
           pthread_mutex_t * _lp = &(x); \
           pthread_mutex_lock(_lp);      \
           (things);                     \
           pthread_mutex_unlock(_lp);    \
      } while (0)

...

        synchronized(x,(
                          printf("hey buddy\n"),
                          a += b,
                          printf("bye buddy\n")
                        ));

Note that you have to use the rarely used comma operator and there are restrictions to what code can live within the (not quite java-like) synchronization code list.