class FFI::Function

Public Instance Methods

attach (mod, name)

Use a workaround for github.com/libffi/libffi/issues/905

# File lib/ffi/function.rb, line 56
def attach(mod, name)
  this = self
  body = proc do |*args, &block|
    this.call(*args, &block)
  end

  mod.define_method(name, body)
  mod.define_singleton_method(name, body)

  # Store function Proc's for re-definition as Ractor-shareable in Library#freeze
  funcs = mod.instance_variable_get("@ffi_function_procs")
  unless funcs
    funcs = {}
    mod.instance_variable_set("@ffi_function_procs", funcs)
  end
  funcs[name] = self

  self
end
param_types ()

Retrieve Array of parameter types

This method returns an Array of FFI types accepted as function parameters.

@return [Array<FFI::Type>]

# File lib/ffi/function.rb, line 49
def param_types
  type.param_types
end
return_type ()

Retrieve the return type of the function

This method returns FFI type returned by the function.

@return [FFI::Type]

# File lib/ffi/function.rb, line 40
def return_type
  type.return_type
end