From 4bbeb6208ac33f71a09701cc5251f0412977946e Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Mon, 10 Nov 2008 23:10:38 +0000
Subject: Ok, the cache-id officiation is being delegated to the CacheHandlers,
 this is just fine, since they can do it any way they want.  The Congo
 CacheHandlers will all have to be specialized versions of the generic ones,
 but they'll use all the general functionality, just make up IDs differently. 
 It'll rock.

---
 src/cachable.h           |  9 +++++++++
 src/cache.h              | 31 +++++++++++++++++++++++++++++++
 src/cachehandler.cpp     |  8 ++++++++
 src/cachehandler.h       | 16 ++++------------
 src/cachehandlernids.cpp |  0
 src/cachehandlernids.h   |  0
 src/cptr.h               | 10 ++++++++++
 src/tests/cache.cpp      | 30 +++++++++++++++++++++++++++++-
 8 files changed, 91 insertions(+), 13 deletions(-)
 create mode 100644 src/cachehandlernids.cpp
 create mode 100644 src/cachehandlernids.h

diff --git a/src/cachable.h b/src/cachable.h
index 529da6f..a54c55b 100644
--- a/src/cachable.h
+++ b/src/cachable.h
@@ -16,4 +16,13 @@ namespace Bu
 	template<> long getCacheId<Cachable>( const Cachable *o );
 };
 
+#define DECL_CACHABLE( name ) \
+	namespace Bu { template<> long getCacheId<name>( const name *o ); }
+
+#define DEF_CACHABLE( name ) \
+	template<> long Bu::getCacheId<name>( const name *o ) \
+	{	\
+		return getCacheId<Bu::Cachable>( (Bu::Cachable *)o );	\
+	}
+
 #endif
diff --git a/src/cache.h b/src/cache.h
index 344d1c6..8ab0659 100644
--- a/src/cache.h
+++ b/src/cache.h
@@ -3,6 +3,8 @@
 
 #include "bu/cptr.h"
 #include "bu/hash.h"
+#include "bu/list.h"
+#include "bu/cachehandler.h"
 
 #define BU_TRACE
 #include "bu/trace.h"
@@ -29,6 +31,21 @@ namespace Bu
 		virtual ~Cache()
 		{
 			TRACE();
+			for( HandlerList::iterator i = lHandler.begin();
+				 i != lHandler.end(); i++ )
+			{
+				delete *i;
+			}
+		}
+
+		void appendHandler( CacheHandler *pHand )
+		{
+			lHandler.append( pHand );
+		}
+
+		void prependHandler( CacheHandler *pHand )
+		{
+			lHandler.prepend( pHand );
 		}
 
 		Ptr insert( obtype *pData )
@@ -39,6 +56,18 @@ namespace Bu
 			return Ptr( *this, pData );
 		}
 
+		Ptr get( cid cId )
+		{
+			TRACE();
+			return Ptr( *this, hEnt.get( cId ).pData );
+		}
+
+		int getRefCnt( cid cId )
+		{
+			TRACE();
+			return hEnt.get( cId ).iRefs;
+		}
+
 	private:
 		void incRef( obtype *pData )
 		{
@@ -64,6 +93,8 @@ namespace Bu
 		typedef Bu::Hash<cid, CacheEntry> CidHash;
 		//RefHash hRefs;
 		CidHash hEnt;
+		typedef Bu::List<CacheHandler *> HandlerList;
+		HandlerList lHandler;
 	};
 };
 
diff --git a/src/cachehandler.cpp b/src/cachehandler.cpp
index d208e98..efd12e7 100644
--- a/src/cachehandler.cpp
+++ b/src/cachehandler.cpp
@@ -1,2 +1,10 @@
 #include "bu/cachehandler.h"
 
+Bu::CacheHandler::CacheHandler()
+{
+}
+
+Bu::CacheHandler::~CacheHandler()
+{
+}
+
diff --git a/src/cachehandler.h b/src/cachehandler.h
index 72fb2b2..6ce1471 100644
--- a/src/cachehandler.h
+++ b/src/cachehandler.h
@@ -3,21 +3,13 @@
 
 namespace Bu
 {
-	template<class obtype>
 	class CacheHandler
 	{
 	public:
-		CacheHandler()
-		{
-		}
-
-		virtual ~CacheHandler()
-		{
-		}
-
-		void forceLoad()
-		{
-		}
+		CacheHandler();
+		virtual ~CacheHandler();
+		virtual void load()=0;
+		virtual void unload()=0;
 
 	private:
 	};
diff --git a/src/cachehandlernids.cpp b/src/cachehandlernids.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/cachehandlernids.h b/src/cachehandlernids.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/cptr.h b/src/cptr.h
index 138ace8..5aafbd3 100644
--- a/src/cptr.h
+++ b/src/cptr.h
@@ -23,6 +23,16 @@ namespace Bu
 			rCache.decRef( pData );
 		}
 
+		obtype &operator*()
+		{
+			return *pData;
+		}
+
+		obtype *operator->()
+		{
+			return pData;
+		}
+
 	private:
 		Bu::Cache<obtype> &rCache;
 		obtype *pData;
diff --git a/src/tests/cache.cpp b/src/tests/cache.cpp
index e51c31b..f05de57 100644
--- a/src/tests/cache.cpp
+++ b/src/tests/cache.cpp
@@ -8,24 +8,52 @@ class Bob : public Bu::Cachable
 public:
 	Bob()
 	{
+		TRACE();
 	}
 
 	virtual ~Bob()
 	{
+		TRACE();
+	}
+
+	void setInt( int i )
+	{
+		TRACE();
+		iInt = i;
+	}
+
+	int getInt()
+	{
+		return iInt;
 	}
 
 	long getCacheId() const
 	{
+		TRACE();
 		return 0;
 	}
 
 	int iInt;
 };
 
+DECL_CACHABLE( Bob );
+DEF_CACHABLE( Bob );
+
 int main()
 {
 	Bu::Cache<Bob> bobCache;
 
-//	Bu::CPtr<Bob> pB = bobCache.insert( new Bob() );
+	Bu::CPtr<Bob> pB1 = bobCache.insert( new Bob() );
+
+	(*pB1).setInt( 44 );
+	
+	printf("RefCnt = %d\n", bobCache.getRefCnt( 0 ) );
+
+	Bu::CPtr<Bob> pB2 = bobCache.get( 0 );
+	
+	printf("RefCnt = %d\n", bobCache.getRefCnt( 0 ) );
+
+	printf("Int = %d\n", pB2->getInt() );
+
 }
 
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