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Self-assignment optimization

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[SVN r22233]
This commit is contained in:
Peter Dimov
2004-02-10 23:17:12 +00:00
parent 7fb399b3bb
commit 53cc52127b
1 changed files with 7 additions and 3 deletions
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10
include/boost/detail/shared_count.hpp
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@ -395,9 +395,13 @@ public:
shared_count & operator= (shared_count const & r) // nothrow
{
sp_counted_base * tmp = r.pi_;
if(tmp != 0) tmp->add_ref_copy();
if(pi_ != 0) pi_->release();
pi_ = tmp;
if(tmp != pi_)
{
if(tmp != 0) tmp->add_ref_copy();
if(pi_ != 0) pi_->release();
pi_ = tmp;
}
return *this;
}