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Add QoS Magic Number note #4157

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Add QoS Magic Number note #4157

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DLu
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@DLu DLu commented Feb 2, 2024

This number needs to be documented.

@DLu DLu mentioned this pull request Feb 2, 2024
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audrow commented Feb 15, 2024

Hey @DLu, can you double check if these values are specific to different DDS implementations?

@audrow audrow added the more-information-needed Further information is required label Feb 15, 2024
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DLu commented Feb 15, 2024

Hey @DLu, can you double check if these values are specific to different DDS implementations?

Honestly, if someone wants to do that they can, but otherwise it just seems like a roadblock to getting better documentation.

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INFINITE is rmw dependent definition as below. and ROS 2 just handles that as INFINITE but exact digits.

  • rmw_fastrtps to Fast-DDS

https://github.com/ros2/rmw_fastrtps/blob/117c64855f3d49544c04feacdb67e8f39ae9a82a/rmw_fastrtps_shared_cpp/src/time_utils.cpp#L23-L33

  • Fast-DDS to rmw_fastrtps

https://github.com/ros2/rmw_fastrtps/blob/117c64855f3d49544c04feacdb67e8f39ae9a82a/rmw_fastrtps_shared_cpp/src/qos.cpp#L42-L49

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@fujitatomoya fujitatomoya fujitatomoya left review comments

@clalancette clalancette Awaiting requested review from clalancette clalancette is a code owner

@audrow audrow Awaiting requested review from audrow audrow is a code owner

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@DLu @audrow @fujitatomoya