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Update COWPtr.h

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alexey-milovidov 2018-03-28 05:27:25 +03:00 committed by GitHub
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1 changed files with 2 additions and 3 deletions
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dbms/src/Common/COWPtr.h
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@ -68,10 +68,9 @@
* of this shared state.
*
* Caveats:
* - after a call to 'mutate' method, you can still have a reference to immutable ptr somewhere
* and it can still become shared. Also it would be better to make 'mutate' method rvalue-qualified.
* - after a call to 'mutate' method, you can still have a reference to immutable ptr somewhere.
* - as 'mutable_ptr' should be unique, it's refcount is redundant - probably it would be better
* to use std::unique_ptr for it, but see above.
* to use std::unique_ptr for it somehow.
*/
template <typename Derived>
class COWPtr : public boost::intrusive_ref_counter<Derived>