Rafael Ávila de Espíndola 4551691b5d return a const reference from return_type ...

We define data_type as

using data_type = shared_ptr<const abstract_type>;

Since it is a shared_ptr, it cannot be copied into another thread
since that would create a race condition incrementing the reference
counter.

In particular, before this patch it is not legal to call
return_type from another thread.

With this patch read only access from another thread is possible.

Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>

2019-04-08 11:07:45 -07:00

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