From 4808617ef54d40efcf1a3ed30525898defb74e10 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Thu, 9 Oct 2008 20:20:34 +0000
Subject: More cache development.  I'm going to have to switch from template
 functions to functors.  I like template functions a little more, but functors
 can be at least as fast.  It won't be much of a change.

---
 src/cache.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'src/cache.h')

diff --git a/src/cache.h b/src/cache.h
index 24ef652..344d1c6 100644
--- a/src/cache.h
+++ b/src/cache.h
@@ -1,20 +1,69 @@
 #ifndef BU_CACHE_H
 #define BU_CACHE_H
 
+#include "bu/cptr.h"
+#include "bu/hash.h"
+
+#define BU_TRACE
+#include "bu/trace.h"
+
 namespace Bu
 {
+	template<class obtype> class Cache;
+	template<class obtype> long getCacheId( const obtype *o );
+
 	template<class obtype>
 	class Cache
 	{
+	friend class Bu::CPtr<obtype>;
+	typedef Bu::CPtr<obtype> Ptr;
+	public:
+		typedef long cid;	/**< Cache ID type. Unique cache entry ID. */
+
 	public:
 		Cache()
 		{
+			TRACE();
 		}
 
 		virtual ~Cache()
 		{
+			TRACE();
+		}
+
+		Ptr insert( obtype *pData )
+		{
+			TRACE();
+			CacheEntry e = {pData, 0};
+			hEnt.insert( getCacheId( pData ), e );
+			return Ptr( *this, pData );
 		}
 
+	private:
+		void incRef( obtype *pData )
+		{
+			TRACE();
+			hEnt.get( getCacheId( pData ) ).iRefs++;
+		}
+
+		void decRef( obtype *pData )
+		{
+			TRACE();
+			CacheEntry &e = hEnt.get( getCacheId( pData ) );
+			e.iRefs--;
+		}
+
+	private:
+		typedef struct CacheEntry
+		{
+			obtype *pData;
+			int iRefs;
+		} CacheEntry;
+
+		//typedef Bu::Hash<ptrdiff_t, int> RefHash;
+		typedef Bu::Hash<cid, CacheEntry> CidHash;
+		//RefHash hRefs;
+		CidHash hEnt;
 	};
 };
 
-- 
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