# File lib/ffi/library.rb, line 139 def callback(*args) raise ArgumentError, "wrong number of arguments" if args.length < 2 || args.length > 3 name, params, ret = if args.length == 3 args else [ nil, args[0], args[1] ] end cb = FFI::CallbackInfo.new(find_type(ret), params.map { |e| find_type(e) }) # Add to the symbol -> type map (unless there was no name) unless name.nil? @ffi_callbacks = Hash.new unless defined?(@ffi_callbacks) @ffi_callbacks[name] = cb end cb end