Contents

# frozen_string_literal: true
GObject.load_class :Closure

module GObject
  # Overrides for GClosure, GObject's base class for closure objects.
  #
  # To create Closure objects wrapping Ruby code, use {RubyClosure}.
  class Closure
    setup_method :new_simple
    setup_instance_method :invoke

    # @override
    #
    # @param [Proc] marshal The marshaller to use for this closure object
    def set_marshal(marshal)
      callback = GObject::ClosureMarshal.from marshal
      Lib.g_closure_set_marshal self, callback
    end

    # @override
    #
    # This override of invoke ensures the return value location can be passed
    # in as the first argument, which is needed to ensure the GValue is
    # initialized with the proper type.
    #
    # @param [GObject::Value] return_value The GValue to store the return
    #   value, or nil if no return value is expected.
    # @param [Array] param_values the closure parameters, or nil if no
    #   parameters are needed.
    # @param invocation_hint
    def invoke(return_value, param_values, invocation_hint = nil)
      rval = GObject::Value.from(return_value)
      n_params = param_values.nil? ? 0 : param_values.length
      params = GirFFI::SizedArray.from(GObject::Value, -1, param_values)
      GObject::Lib.g_closure_invoke self, rval, n_params, params, invocation_hint
      rval.get_value
    end

    def store_pointer(ptr)
      super
      # NOTE: Call C functions directly to avoid extra argument conversion
      Lib.g_closure_ref ptr
      Lib.g_closure_sink ptr
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
gir_ffi-0.10.2	lib/ffi-gobject/closure.rb