diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/o3tl/cow_wrapper.hxx | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/include/o3tl/cow_wrapper.hxx b/include/o3tl/cow_wrapper.hxx index b7659c3a286f..3f117a2b395b 100644 --- a/include/o3tl/cow_wrapper.hxx +++ b/include/o3tl/cow_wrapper.hxx @@ -121,7 +121,7 @@ public: int queryUnmodified() const; private: - otl::cow_wrapper< cow_wrapper_client_impl > maImpl; + o3tl::cow_wrapper< cow_wrapper_client_impl > maImpl; }; </pre> and the implementation file would look like this: @@ -187,8 +187,8 @@ int cow_wrapper_client::queryUnmodified() const void release() { - if( !MTPolicy::decrementCount(m_pimpl->m_ref_count) ) - boost::checked_delete(m_pimpl), m_pimpl=0; + if( m_pimpl && !MTPolicy::decrementCount(m_pimpl->m_ref_count) ) + boost::checked_delete(m_pimpl), m_pimpl = nullptr; } public: @@ -219,6 +219,14 @@ int cow_wrapper_client::queryUnmodified() const MTPolicy::incrementCount( m_pimpl->m_ref_count ); } + /** Move-construct and steal rSrc shared resource + */ + explicit cow_wrapper( cow_wrapper&& rSrc ) : + m_pimpl( rSrc.m_pimpl ) + { + rSrc.m_pimpl = nullptr; + } + ~cow_wrapper() // nothrow, if ~T does not throw { release(); @@ -236,6 +244,18 @@ int cow_wrapper_client::queryUnmodified() const return *this; } + /// stealing rSrc's resource + cow_wrapper& operator=( cow_wrapper&& rSrc ) + { + // self-movement guts ourself, see also 17.6.4.9 + release(); + m_pimpl = rSrc.m_pimpl; + + rSrc.m_pimpl = nullptr; + + return *this; + } + /// unshare with any other cow_wrapper instance value_type& make_unique() { |