2 files changed, 36 insertions, 4 deletions

diff --git a/src/cache.h b/src/cache.h
index 9488044..cc13fc8 100644
--- a/src/cache.h
+++ b/src/cache.h
@@ -5,6 +5,7 @@
 #include "bu/hash.h"
 #include "bu/list.h"
 #include "bu/cachestore.h"
+#include "bu/cachecalc.h"
 
 #define BU_TRACE
 #include "bu/trace.h"
@@ -20,6 +21,7 @@ namespace Bu
         private:
                 typedef Bu::CacheStore<obtype, keytype> Store;
                 typedef Bu::List<Store *> StoreList;
+                typedef Bu::CacheCalc<obtype, keytype> Calc;
                 
                 typedef struct CacheEntry
                 {
@@ -30,7 +32,8 @@ namespace Bu
                 typedef Bu::Hash<keytype, CacheEntry> CidHash;
 
         public:
-                Cache()
+                Cache() :
+                        pCalc( NULL )
                 {
                         TRACE();
                 }
@@ -47,6 +50,10 @@ namespace Bu
                                         __tracer_format( i.getKey() );
                                         printf("!\n");
                                 }
+                                if( pCalc ) pCalc->onUnload(
+                                        i.getValue().pData,
+                                        i.getKey()
+                                        );
                                 lStore.first()->unload(
                                         i.getValue().pData,
                                         i.getKey()
@@ -71,6 +78,16 @@ namespace Bu
                         lStore.prepend( pHand );
                 }
 
+                void setCalc( Calc *pCalc )
+                {
+                        TRACE();
+                        if( this->pCalc )
+                        {
+                                delete this->pCalc;
+                        }
+                        this->pCalc = pCalc;
+                }
+
                 Ptr insert( obtype *pData )
                 {
                         TRACE( pData );
@@ -78,10 +95,12 @@ namespace Bu
                         keytype k = lStore.first()->create( pData );
                         hEnt.insert( k, e );
 
+                        if( pCalc ) pCalc->onLoad( pData, k );
+
                         return Ptr( *this, pData, k );
                 }
 
-                Ptr get( keytype cId )
+                Ptr get( const keytype &cId )
                 {
                         TRACE( cId );
                         try {
@@ -94,7 +113,12 @@ namespace Bu
                         }
                 }
 
-                void erase( keytype cId )
+                int getRefCount( const keytype &cId )
+                {
+                        return hEnt.get( cId ).iRefs;
+                }
+
+                void erase( const keytype &cId )
                 {
                         TRACE( cId );
                         try {
@@ -107,6 +131,9 @@ namespace Bu
                         catch( Bu::HashException &e ) {
                                 get( cId );
                         }
+                        
+                        if( pCalc ) pCalc->onUnload( hEnt.get( cId ).pData, cId );
+                        
                         lStore.first()->destroy( hEnt.get( cId ).pData, cId );
                         hEnt.erase( cId );
                 }
@@ -134,6 +161,7 @@ namespace Bu
         private:
                 CidHash hEnt;
                 StoreList lStore;
+                Calc *pCalc;
         };
 };
 
diff --git a/src/cachecalc.h b/src/cachecalc.h
index 9e83b06..289c4ac 100644
--- a/src/cachecalc.h
+++ b/src/cachecalc.h
@@ -3,7 +3,7 @@
 
 namespace Bu
 {
-        template<class type>
+        template<class obtype, class keytype>
         class CacheCalc
         {
         public:
@@ -15,6 +15,10 @@ namespace Bu
                 {
                 }
 
+                virtual void onLoad( obtype *pSrc, const keytype &key )=0;
+                virtual void onUnload( obtype *pSrc, const keytype &key )=0;
+                virtual void onTick() { };
+
         private:
         };
 };