ACE/ace/Hashable.cpp

   1 #include "ace/Hashable.h"
   2
   3 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
   4
   5 unsigned long
   6 ACE_Hashable::hash () const
   7 {
   8   // In doing the check below, we take chance of paying a performance
   9   // price when the hash value is zero.  But, that will (hopefully)
  10   // happen far less often than a non-zero value, so this caching
  11   // strategy should pay off, esp. if hash computation is expensive
  12   // relative to the simple comparison.
  13
  14   if (this->hash_value_ == 0)
  15     this->hash_value_ = this->hash_i ();
  16
  17   return this->hash_value_;
  18 }
  19
  20 ACE_END_VERSIONED_NAMESPACE_DECL