Asynchronously attempts to determine whether or not the host pointed to by connectable can be reached, without actually
trying to connect to it.
For more details, see can_reach.
When the operation is finished, callback will be called. You can then call can_reach_async.end
to get the result of the operation.
| this | |
| connectable | |
| cancellable |
a Cancellable, or null |
| callback |
a AsyncReadyCallback to call when the request is satisfied |
| user_data |
the data to pass to callback function |