Module: Fzeet::Windows::COM::Callback

Defined in:

lib/fzeet/windows/com/Common.rb

Class Method Summary

• .[](iface) ⇒ Object

Class Method Details

.[](iface) ⇒ Object

# File 'lib/fzeet/windows/com/Common.rb', line 212

def self.[](iface)
	Class.new(iface) {
		send(:include, Helpers)

		def initialize(opts = {})
			@vtbl, @refc = self.class::VTBL.new, 1

			@vtbl.members.each { |name|
				@vtbl[name] = instance_variable_set("@fn#{name}",
					FFI::Function.new(*@vtbl.class::SPEC[name].reverse, convention: :stdcall) { |*args|
						send(name, *args[1..-1])
					}
				)
			}

			self[:lpVtbl] = @vtbl

			begin
				yield self
			ensure
				Release()
			end if block_given?
		end

		attr_reader :vtbl, :refc

		def QueryInterface(riid, ppv)
			if [IUnknown::IID, self.class::IID].any? { |iid| Windows.memcmp(riid, iid, iid.size) == 0 }
				ppv.write_pointer(self)
			else
				ppv.write_pointer(0); return E_NOINTERFACE
			end

			AddRef(); S_OK
		end

		def AddRef
			@refc += 1
		end

		def Release
			@refc -= 1
		end

		(self::VTBL.members - IUnknown::VTBL.members).each { |name|
			define_method(name) { |*args|
				E_NOTIMPL
			}
		}
	}
end