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EDIT :: closure.rb

# frozen_string_literal: true module Fiddle class Closure class << self # Create a new closure. If a block is given, the created closure # is automatically freed after the given block is executed. # # The all given arguments are passed to Fiddle::Closure.new. So # using this method without block equals to Fiddle::Closure.new. # # == Example # # Fiddle::Closure.create(TYPE_INT, [TYPE_INT]) do |closure| # # closure is freed automatically when this block is finished. # end def create(*args) if block_given? closure = new(*args) begin yield(closure) ensure closure.free end else new(*args) end end end # the C type of the return of the FFI closure attr_reader :ctype # arguments of the FFI closure attr_reader :args # Extends Fiddle::Closure to allow for building the closure in a block class BlockCaller < Fiddle::Closure # == Description # # Construct a new BlockCaller object. # # * +ctype+ is the C type to be returned # * +args+ are passed the callback # * +abi+ is the abi of the closure # # If there is an error in preparing the +ffi_cif+ or +ffi_prep_closure+, # then a RuntimeError will be raised. # # == Example # # include Fiddle # # cb = Closure::BlockCaller.new(TYPE_INT, [TYPE_INT]) do |one| # one # end # # func = Function.new(cb, [TYPE_INT], TYPE_INT) # def initialize ctype, args, abi = Fiddle::Function::DEFAULT, &block super(ctype, args, abi) @block = block end # Calls the constructed BlockCaller, with +args+ # # For an example see Fiddle::Closure::BlockCaller.new # def call *args @block.call(*args) end end end end

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