Fiddle::Closure::BlockCaller

Class

Extends Fiddle::Closure to allow for building the closure in a block

Class Methods

new(ctype, args, abi = Fiddle::Function::DEFAULT, &block)

ext/fiddle/lib/fiddle/closure.rb View on GitHub

          
            # File tmp/rubies/ruby-2.6.10/ext/fiddle/lib/fiddle/closure.rb, line 35
def initialize ctype, args, abi = Fiddle::Function::DEFAULT, &block
  super(ctype, args, abi)
  @block = block
end

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)

Instance Methods

call(*args)

ext/fiddle/lib/fiddle/closure.rb View on GitHub

          
            # File tmp/rubies/ruby-2.6.10/ext/fiddle/lib/fiddle/closure.rb, line 44
def call *args
  @block.call(*args)
end

Calls the constructed BlockCaller, with args

For an example see Fiddle::Closure::BlockCaller.new