*** empty log message ***

1 files changed, 16 insertions, 0 deletions

diff --git a/ace/Strategies.i b/ace/Strategies.i
index a0ef94ea2da..2d101275030 100644
--- a/ace/Strategies.i
+++ b/ace/Strategies.i
@@ -38,6 +38,7 @@ ACE_Recyclable::state (ACE_Recyclable::State new_state)
 
 ACE_INLINE 
 ACE_Hashable::ACE_Hashable (void)
+  : hash_value_ (0)
 {
 }
 
@@ -46,6 +47,21 @@ ACE_Hashable::~ACE_Hashable (void)
 {
 }
 
+ACE_INLINE u_long
+ACE_Hashable::hash (void) const
+{
+  // In doing the check below, we take chance of paying a performance
+  // price when the hash value is zero.  But, that will (hopefully)
+  // happen far less often than a non-zero value, so this caching
+  // strategy should pay off, esp. if hash computation is expensive
+  // relative to the simple comparison.
+
+  if (this->hash_value_ == 0)
+    ((ACE_Hashable *) this)->hash_value_ = this->hash_i ();
+
+  return this->hash_value_;
+}
+
 ACE_INLINE 
 ACE_Refcountable::ACE_Refcountable (int refcount)
   : refcount_ (refcount)