[jira] [Created] (PROTON-2558) Provide an API to create pn_class_t instances

["Andrew Stitcher (Jira)" <ji...@apache.org>]

Andrew Stitcher created PROTON-2558:
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             Summary: Provide an API to create pn_class_t instances
                 Key: PROTON-2558
                 URL: https://issues.apache.org/jira/browse/PROTON-2558
             Project: Qpid Proton
          Issue Type: Sub-task
            Reporter: Andrew Stitcher
            Assignee: Andrew Stitcher


The Proton bindings (for at least Python, C++ and ruby) need to create {{pn_class_t}} instances for various reasons. Currently the only way to do that is to use some macros in {{proton/object.h}} which create static const {{pn_class_t}} instances however this requires knowledge of the internals of the struct itself which means that it cannot be changed without breaking ABI.

So shifting this to a dynamic API is necessary to hide the internals of {{{}pn_class_t{}}}. This is very slightly less efficient but only in the startup path so it really doesn't matter all that much!



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