Merge two internal classes of QSharedPointer and de-virtualise them

The two classes are QtSharedPointer::ExternalRefCountData and
ExternalRefCountWithDestroyFn. The split existed because of what Qt
4.5 did before custom deleters existed: the ExternalRefCountData class
was a virtual class that contained a destroy() virtual, which was in
charge of deleting the data or returning false if it didn't.

Turns out that virtual classes was a mistake. This commit
de-virtualises them -- we couldn't do it in Qt 4 because of binary
compatibility. This saves us one pointer-size in the size of the
private, plus the fact that fewer symbols are required (there is no
virtual table to be initialised).

Additionaly, since a deleter is always stored with the reference
count, we don't need the split between the two classes anymore.

Change-Id: I1cd9400561dcee089a406a57bd856b1730f18afc
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

0 files changed, 0 insertions, 0 deletions