Export dds_writecdr_impl

[ymski]

Background

Hi, I am one of the development members of CARET.
Thanks for exporting dds_write_impl that were hooked in CARET in Issue 1308.
After having the symbol exported, CARET is able to perform the performance analysis as before.

We are currently developing the capability to analyze communications using GenericPublsiher.
To implement this feature, we need to hook dds_writecdr_impl, but as you know, this symbol is currently hidden.

Changes

Export dds_writecdr_impl symbol.
dds_writecdr_impl is a convenient trace point for instrumenting the code for performance measurements.

Related Links

• Questions about symbol removal #1833
• Export dds_write_impl #1846

[ymski]

@eboasson
May I request a review or reviewer assignment for this pull request?
Please contact me if it is incomplete.

[nabetetsu]

@eboasson
It is not something that requires an urgent response, but we would appreciate it if you could take the time in your busy shecule to review this PR.

[eboasson]

@nabetetsu thanks for bumping this! @ymski, my apologies for not failing to really catch up after the holidays ...

I'd hoped to avoid having to export this one, but ... clearly this is an exported internal function and I won't promise not to break CARET in the future by changing this, but I am happy to promise that Cyclone will retain practical entry points for this type of instrumentation.

[nabetetsu]

@eboasson We greatly appreciate your kind consideration!