If pointer1 points to the same address as pointer2 , pointer-eq returns t , otherwise it returns nil .
The function pointer-eq tests whether two pointers point to the same address, and returns t if they do, and nil if they do not.
In the following example a pointer, point1 , is defined, and point2 is set equal to it. Both are then tested to see if they are equal to each other using pointer-eq . Then point2 is defined to point to a different object, and the two pointers are tested for equality again.
(setq point1 (fli:allocate-foreign-object :type :int)) (setq point2 point1) (fli:pointer-eq point1 point2) (setq point2 (fli:allocate-foreign-object :type :int)) (fli:pointer-eq point1 point2)