Pavel Emelyanov 9216a5bc08 allocation_strategy, code: Conceptualize dynamic objects ...

Usually lsa allocation is performed with the construct() helper that
allocates a sizeof(T) slot and constructs it in place. Some rare
objects have dynamic size, so they are created by alloc()ating a
slot of some specific size and (!) must provide the correct overload
of size_for_allocation_strategy that reports back the relevant
storage size.

This "must provide" is not enforced, if missed a default sizer would
be instantiated, but won't work properly. This patch makes all users
of alloc() conform to DynamicObject concept which requires the
presense of .storage_size() method to tell that size.

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>

2021-05-19 09:23:49 +03:00

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