Module: Fzeet::Windows::COM::Helpers

Defined in:
lib/fzeet/windows/com/Common.rb

Instance Method Summary collapse

Instance Method Details

#QueryInstance(klass) ⇒ Object 



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# File 'lib/fzeet/windows/com/Common.rb', line 124

def QueryInstance(klass)
  instance = nil

  FFI::MemoryPointer.new(:pointer) { |ppv|
    QueryInterface(klass::IID, ppv)

    instance = klass.new(ppv.read_pointer)
  }

  begin
    yield instance; return self
  ensure
    instance.Release
  end if block_given?

  instance
end

#UseInstance(klass, name, *args) ⇒ Object 



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# File 'lib/fzeet/windows/com/Common.rb', line 142

def UseInstance(klass, name, *args)
  instance = nil

  FFI::MemoryPointer.new(:pointer) { |ppv|
    send(name, *args, klass::IID, ppv)

    yield instance = klass.new(ppv.read_pointer)
  }

  self
ensure
  instance.Release if instance
end