dds_take vs dds_takecdr

[wjbbupt]

I took a look at the interface of c++ package take, using dds_readcdr_impl, c
The version is dds_read_impl, and the difference between these two interfaces is:

1. The size of max, c++ is 100, and c is the supported input size;
2. The type of buf, c++ is struct ddsi_serdata, c is void**

My question is: is it because c++ uses the dds_takecdr() interface, and c uses dds_take(); this difference affects the performance and causes the performance of c++ to be worse than that of c;
I hope to get an answer from you. I also want to refactor the c++ packaging interface to narrow the difference between c and c++.

[reicheratwork]

I think this issue is kind of duplicated by CycloneDDS-CXX #358, so in my opinion this one can be closed.