lib/ngt/ffi.rb in ngt-0.4.1 vs lib/ngt/ffi.rb in ngt-0.4.2

@@ -74,7 +74,16 @@
     attach_function :ngt_create_optimizer, %i[bool pointer], :pointer
     attach_function :ngt_optimizer_adjust_search_coefficients, %i[pointer string pointer], :bool
     attach_function :ngt_optimizer_execute, %i[pointer string string pointer], :bool
     attach_function :ngt_optimizer_set, %i[pointer int int int float float float float double double pointer], :bool
     attach_function :ngt_destroy_optimizer, %i[pointer], :void
+
+    def self.add_finalizer(pointer, method)
+      ObjectSpace.define_finalizer(pointer, finalize(pointer.to_i, method))
+    end
+
+    def self.finalize(addr, method)
+      # must use proc instead of stabby lambda
+      proc { FFI.send(method, ::FFI::Pointer.new(:pointer, addr)) }
+    end
   end
 end