Function FIX2LONG 

pub unsafe fn FIX2LONG(obj: VALUE) -> c_long

Convert Fixnum to long (akin to FIX2LONG).

Extracts the integer value from a Fixnum VALUE by performing an arithmetic right shift.

Safety

• obj must be a valid Fixnum VALUE (checked with FIXNUM_P)
• Behavior is undefined if called on non-Fixnum values