Help with porting allegro timer

[Jotz]

I'm trying to copy the method of using a timer for Allegro that is in C++. The problem is I don't know how to convert some things from C++ to FB:

Code:

volatile long speed_counter = 0; //what would I use for volatiles?

void increment_speed_counter() //a function
{
  speed_counter++;  //easy: speed_counter = speed_counter + 1
}
END_OF_FUNCTION(increment_speed_counter);  //that is a macro,
                                                                         //how would I use?

//more macros...

LOCK_VARIABLE(speed_counter);
LOCK_FUNCTION(increment_speed_counter);

I don't know how to do the volatile variables and the macros. How would I make those?