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author | bala <balanatarajan@users.noreply.github.com> | 2001-12-10 21:48:59 +0000 |
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committer | bala <balanatarajan@users.noreply.github.com> | 2001-12-10 21:48:59 +0000 |
commit | f01d9f24020077a7851ba3b9e379907a0fa32347 (patch) | |
tree | 4f00fe99639595a8bf15b1f637b532caa8bed86a /ace/Hashable.inl | |
parent | e75c6cfa29c521009305159a3148794369d4d975 (diff) | |
download | ATCD-f01d9f24020077a7851ba3b9e379907a0fa32347.tar.gz |
ChangeLogTag: Mon Dec 10 15:39:22 2001 Balachandran Natarajan <bala@cs.wustl.edu>
Diffstat (limited to 'ace/Hashable.inl')
-rw-r--r-- | ace/Hashable.inl | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/ace/Hashable.inl b/ace/Hashable.inl new file mode 100644 index 00000000000..554c55a5d0a --- /dev/null +++ b/ace/Hashable.inl @@ -0,0 +1,27 @@ +/* -*- C++ -*- */ + +ACE_INLINE +ACE_Hashable::ACE_Hashable (void) + : hash_value_ (0) +{ +} + +ACE_INLINE +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_; +} |