From: d.frey_at_[hidden]
Date: 2008-04-22 02:31:33
Author: daniel_frey
Date: 2008-04-22 02:31:32 EDT (Tue, 22 Apr 2008)
New Revision: 44711
URL: http://svn.boost.org/trac/boost/changeset/44711
Log:
Avoid unneccessary increment/decrement of reference count
Text files modified:
trunk/boost/detail/shared_count.hpp | 20 ++++++++++++++------
1 files changed, 14 insertions(+), 6 deletions(-)
Modified: trunk/boost/detail/shared_count.hpp
==============================================================================
--- trunk/boost/detail/shared_count.hpp (original)
+++ trunk/boost/detail/shared_count.hpp 2008-04-22 02:31:32 EDT (Tue, 22 Apr 2008)
@@ -324,9 +324,13 @@
weak_count & operator= (shared_count const & r) // nothrow
{
sp_counted_base * tmp = r.pi_;
- if(tmp != 0) tmp->weak_add_ref();
- if(pi_ != 0) pi_->weak_release();
- pi_ = tmp;
+
+ if( tmp != pi_ )
+ {
+ if(tmp != 0) tmp->weak_add_ref();
+ if(pi_ != 0) pi_->weak_release();
+ pi_ = tmp;
+ }
return *this;
}
@@ -334,9 +338,13 @@
weak_count & operator= (weak_count const & r) // nothrow
{
sp_counted_base * tmp = r.pi_;
- if(tmp != 0) tmp->weak_add_ref();
- if(pi_ != 0) pi_->weak_release();
- pi_ = tmp;
+
+ if( tmp != pi_ )
+ {
+ if(tmp != 0) tmp->weak_add_ref();
+ if(pi_ != 0) pi_->weak_release();
+ pi_ = tmp;
+ }
return *this;
}