DDSPSMC — General Exception Safety Considerations

1. The normative implementations shown in the wrapper classes should be at strong exception safe (or at least basic safe). For instance, implementation of DataReader:: create_readcondition as in dds-psm-cxx\src\hpp\dds\sub\DataReader.hpp is a shared_ptr usage anti-pattern.

Proposed Solution:
Create separate shared_ptr<T> objects for every new operation. Pass the shared_ptr<T> to the constructor of ReadCondition.

2. All setters and getters (including overloaded operators) of EntityQos should be strong exception safe.

Proposed Solution: Make copy-assignment operator of every qos type in normative namespaces strong exception safe.

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