flags affecting the operation
a GMountOperation, or NULL to avoid user interaction. [allow-none]
optional GCancellable object, NULL to ignore. [allow-none]
a GAsyncReadyCallback to call when the request is satisfied, or NULL. [allow-none]
the data to pass to callback function
Starts a file of type G_FILE_TYPE_MOUNTABLE. Using start_operation, you can request callbacks when, for instance, passwords are needed during authentication. If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. When the operation is finished, callback will be called. You can then call g_file_mount_mountable_finish() to get the result of the operation. Since 2.22