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Avoid unneccessary increment/decrement of reference count

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[SVN r44711]
This commit is contained in:
Daniel Frey
2008-04-22 06:31:32 +00:00
parent b541145a60
commit e12ed6864b
1 changed files with 14 additions and 6 deletions
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8
include/boost/detail/shared_count.hpp
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@@ -324,9 +324,13 @@ public:
weak_count & operator= (shared_count const & r) // nothrow weak_count & operator= (shared_count const & r) // nothrow
{ {
sp_counted_base * tmp = r.pi_; sp_counted_base * tmp = r.pi_;
if( tmp != pi_ )
{
if(tmp != 0) tmp->weak_add_ref(); if(tmp != 0) tmp->weak_add_ref();
if(pi_ != 0) pi_->weak_release(); if(pi_ != 0) pi_->weak_release();
pi_ = tmp; pi_ = tmp;
}
return *this; return *this;
} }
@@ -334,9 +338,13 @@ public:
weak_count & operator= (weak_count const & r) // nothrow weak_count & operator= (weak_count const & r) // nothrow
{ {
sp_counted_base * tmp = r.pi_; sp_counted_base * tmp = r.pi_;
if( tmp != pi_ )
{
if(tmp != 0) tmp->weak_add_ref(); if(tmp != 0) tmp->weak_add_ref();
if(pi_ != 0) pi_->weak_release(); if(pi_ != 0) pi_->weak_release();
pi_ = tmp; pi_ = tmp;
}
return *this; return *this;
} }