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Add stub dynamic network interface implementation. #99

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Per this ros2/rclcpp#2086 (comment) comment on a related PR, this PR seeks to add a stubbed version of a feature developed for rmw_fastrtps: ros2/rmw_fastrtps#662 so that if this feature is called with an rmw layer that does not implement the feature, it returns an error that can be handled.

Signed-off-by: Sebastian Jakymiw [email protected]

* This function returns `NULL` when either the node handle is `NULL` or when the
* node handle is from a different rmw implementation.
*
* \return rmw_ret_t non `NULL` value if successful, otherwise `NULL`
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this comment seems wrong (the function does not return NULL and it does not take a node handle as argument)

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Ah whoops. That is left over from the actual implementation. I will fix.

Signed-off-by: Sebastian Jakymiw <[email protected]>
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Looks good to me, thank you for the contribution @jakymiws.

The PR can be merged once ros2/rclcpp#2086 and other related PRs are moved forward and approved.

I guess it wouldn't hurt merging it sooner than that either, since it only adds new functions, but I would prefer to wait for the feature to be approved.

@@ -229,3 +229,9 @@ rmw_api_connextdds_node_get_graph_guard_condition(const rmw_node_t * rmw_node)

return node_impl->graph_guard_condition();
}

rmw_ret_t
rmw_notify_participant_dynamic_network_interface(rmw_context_t * context)
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Minor comment, which applies more to the rmw interface that this specific change, but I always prefer to pass const pointers, e.g.:

Suggested change
rmw_notify_participant_dynamic_network_interface(rmw_context_t * context)
rmw_notify_participant_dynamic_network_interface(rmw_context_t * const context)

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3 participants