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105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/***************************************************************************
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*
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* $Id: blockcacheclient.h 684 2008-08-19 22:22:59Z pleblanc $
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*
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* *
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***************************************************************************/
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#pragma once
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#include "blockrequestprocessor.h"
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#include "brmtypes.h"
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/**
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@author Jason Rodriguez <jrodriguez@calpont.com>
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*/
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/**
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* @brief API for the Disk Block Buffer Cache
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*
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*
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*/
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namespace dbbc
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{
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class blockCacheClient
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{
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public:
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/**
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* @brief ctor requires reference to BlockRequestProcessor object
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**/
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blockCacheClient(BlockRequestProcessor& brp);
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/**
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* @brief dtor
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**/
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virtual ~blockCacheClient();
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/**
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* @brief verify that the Disk Block for the LBID lbid, ver are loaded into the Cache.
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**/
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void check(BRM::LBID_t lbid, BRM::VER_t ver, bool flg, bool& wasBlockInCache);
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/**
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* @brief verify all Disk Blocks for the LBID range are loaded into the Cache
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**/
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void check(const BRM::InlineLBIDRange& range, const BRM::VER_t ver, uint32_t& rCount);
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/**
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* @brief retrieve the Disk Block at lbid, ver from the Disk Block Buffer Cache
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**/
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const int read(const BRM::LBID_t& lbid, const BRM::VER_t& ver, FileBuffer& fb);
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FileBuffer* getBlockPtr(const BRM::LBID_t& lbid, const BRM::VER_t& ver);
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/**
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* @brief retrieve the Disk Block at lbid, ver from the Disk Block Buffer Cache
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**/
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const int read(const BRM::LBID_t& lbid, const BRM::VER_t& ver, void* bufferPtr);
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/**
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* @brief retrieve all disk Blocks in the LBIDRange range and insert them into fbList
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**/
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const int read(const BRM::InlineLBIDRange& range, FileBufferList_t& fbList, const BRM::VER_t ver);
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const int getBlock(const BRM::LBID_t& lbid, const BRM::VER_t& ver, void* bufferPtr, bool flg,
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bool& wasCached);
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bool exists(BRM::LBID_t lbid, BRM::VER_t ver);
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/**
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* @brief flush the cache
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**/
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void flushCache();
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private:
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/**
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* @brief pointer to the BlockRequestProcessor object on which the API will operate
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**/
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BlockRequestProcessor* fBCCBrp;
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// do not implement
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blockCacheClient();
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blockCacheClient(const blockCacheClient& bc);
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const blockCacheClient& operator=(const blockCacheClient& blk);
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};
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} // namespace dbbc
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