Sets or clears this's check-cancellable flag.
If this is true (the default), then propagate_pointer, etc, and had_error will check the task's Cancellable first, and if it has been cancelled, then they will consider the task to have returned an "Operation was cancelled" error (g_io_error_cancelled), regardless of any other error or return value the task may have had.
If check_cancellable is false, then the
Task will not check the cancellable itself, and it is up to this's owner to do this (eg, via
return_error_if_cancelled).
If you are using set_return_on_cancel as well, then you must leave check-cancellable set true.
| this |
the Task |
| check_cancellable |
whether Task will check the state of its Cancellable for you. |