src_other/tuplebase/ZTS_DB.h

00001 /*  @(#) $Id: ZTS_DB.h,v 1.2 2007/01/30 19:55:28 agreen Exp $ */
00002 
00003 /* ------------------------------------------------------------
00004 Copyright (c) 2007 Andrew Green and Learning in Motion, Inc.
00005 http://www.zoolib.org
00006 
00007 Permission is hereby granted, free of charge, to any person obtaining a copy
00008 of this software and associated documentation files (the "Software"), to deal
00009 in the Software without restriction, including without limitation the rights
00010 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00011 copies of the Software, and to permit persons to whom the Software is
00012 furnished to do so, subject to the following conditions:
00013 
00014 The above copyright notice and this permission notice shall be included in
00015 all copies or substantial portions of the Software.
00016 
00017 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00018 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00019 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00020 COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
00021 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
00022 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00023 ------------------------------------------------------------ */
00024 
00025 #ifndef __ZTS_DB__
00026 #define __ZTS_DB__
00027 #include "zconfig.h"
00028 
00029 #include "ZFile.h"
00030 #include "ZTS.h"
00031 #include "ZTupleIndex.h"
00032 
00033 #include <string>
00034 #include <vector>
00035 
00036 #include <db.h>
00037 
00038 // =================================================================================================
00039 #pragma mark -
00040 #pragma mark * ZTS_DB
00041 
00042 class ZTS_DB : public ZTS
00043         {
00044 public:
00045         ZTS_DB(const ZFileSpec& iFileSpec);
00046         ZTS_DB(const ZFileSpec& iFileSpec, const std::vector<std::vector<std::string> >& iIndexSpecs);
00047         virtual ~ZTS_DB();
00048 
00049 // From ZTS
00050         virtual void AllocateIDs(size_t iCount, uint64& oBaseID, size_t& oCount);
00051         virtual void SetTuples(size_t iCount, const uint64* iIDs, const ZTuple* iTuples);
00052         virtual void GetTuples(size_t iCount, const uint64* iIDs, ZTuple* oTuples);
00053         virtual void Search(
00054                 const ZTBSpec& iSpec, const std::set<uint64>& iSkipIDs, std::set<uint64>& ioIDs);
00055         virtual ZMutexBase& GetReadLock();
00056         virtual ZMutexBase& GetWriteLock();
00057 
00058 // Our protocol
00059         void Flush();
00060 
00061 // Uggh
00062         void SetNextUnusedID(uint64 iID) { fNextUnusedID = iID; }
00063 
00064 private:
00065         class Index;
00066         friend class Index;
00067 
00068         bool pGetTuple(uint64 iID, ZTuple& oTuple);
00069         void pFlush();
00070 
00071         static int sBTree_Compare(const DBT* iLeft, const DBT* iRight);
00072         static size_t sBTree_Prefix(const DBT* iLeft, const DBT* iRight);
00073 
00074         ZMutex fMutex;
00075         ZMutex fMutex_ID;
00076         uint64 fNextUnusedID;
00077         ZFileSpec fFileSpec;
00078         bool fChanged;
00079         DB* fDB;
00080         vector<ZTupleIndex*> fIndices;
00081         };
00082 
00083 #endif // __ZTS_DB__

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