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Leonid Fedorov
@ -49,48 +49,51 @@ class Log;
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//------------------------------------------------------------------------------
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class AllocExtEntry
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{
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public:
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// Default constructor
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AllocExtEntry() : fOid(0),
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fColWidth(0),
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fDbRoot(0),
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fPartNum(0),
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fSegNum(0),
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fStartLbid(0),
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fAllocSize(0),
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fHwm(0),
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fStatus(NO_ERROR),
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fStripeKey(0) { }
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public:
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// Default constructor
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AllocExtEntry()
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: fOid(0)
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, fColWidth(0)
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, fDbRoot(0)
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, fPartNum(0)
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, fSegNum(0)
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, fStartLbid(0)
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, fAllocSize(0)
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, fHwm(0)
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, fStatus(NO_ERROR)
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, fStripeKey(0)
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{
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}
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// Used to create entry for an existing extent we are going to add data to.
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AllocExtEntry ( OID& oid, int colWidth,
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uint16_t dbRoot, uint32_t partNum, uint16_t segNum,
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BRM::LBID_t startLbid, int allocSize,
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HWM hwm, int status, const std::string& statusMsg,
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unsigned int stripeKey ) :
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fOid(oid),
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fColWidth(colWidth),
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fDbRoot(dbRoot),
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fPartNum(partNum),
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fSegNum(segNum),
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fStartLbid(startLbid),
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fAllocSize(allocSize),
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fHwm(hwm),
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fStatus(status),
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fStatusMsg(statusMsg),
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fStripeKey(stripeKey) { }
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// Used to create entry for an existing extent we are going to add data to.
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AllocExtEntry(OID& oid, int colWidth, uint16_t dbRoot, uint32_t partNum, uint16_t segNum,
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BRM::LBID_t startLbid, int allocSize, HWM hwm, int status, const std::string& statusMsg,
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unsigned int stripeKey)
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: fOid(oid)
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, fColWidth(colWidth)
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, fDbRoot(dbRoot)
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, fPartNum(partNum)
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, fSegNum(segNum)
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, fStartLbid(startLbid)
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, fAllocSize(allocSize)
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, fHwm(hwm)
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, fStatus(status)
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, fStatusMsg(statusMsg)
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, fStripeKey(stripeKey)
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{
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}
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OID fOid; // column OID
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int fColWidth; // colum width (in bytes)
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uint16_t fDbRoot; // DBRoot of allocated extent
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uint32_t fPartNum; // Partition number of allocated extent
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uint16_t fSegNum; // Segment number of allocated extent
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BRM::LBID_t fStartLbid; // Starting LBID of allocated extent
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int fAllocSize; // Number of allocated LBIDS
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HWM fHwm; // Starting fbo or hwm of allocated extent
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int fStatus; // Status of extent allocation
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std::string fStatusMsg; // Status msg of extent allocation
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unsigned int fStripeKey;// "Stripe" identifier for this extent
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OID fOid; // column OID
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int fColWidth; // colum width (in bytes)
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uint16_t fDbRoot; // DBRoot of allocated extent
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uint32_t fPartNum; // Partition number of allocated extent
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uint16_t fSegNum; // Segment number of allocated extent
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BRM::LBID_t fStartLbid; // Starting LBID of allocated extent
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int fAllocSize; // Number of allocated LBIDS
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HWM fHwm; // Starting fbo or hwm of allocated extent
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int fStatus; // Status of extent allocation
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std::string fStatusMsg; // Status msg of extent allocation
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unsigned int fStripeKey; // "Stripe" identifier for this extent
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};
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//------------------------------------------------------------------------------
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@ -100,10 +103,10 @@ public:
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//------------------------------------------------------------------------------
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struct AllocExtHasher : public std::unary_function<OID, std::size_t>
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{
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std::size_t operator()(OID val) const
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{
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return static_cast<std::size_t>(val);
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}
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std::size_t operator()(OID val) const
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{
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return static_cast<std::size_t>(val);
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}
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};
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//------------------------------------------------------------------------------
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@ -114,69 +117,59 @@ struct AllocExtHasher : public std::unary_function<OID, std::size_t>
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//------------------------------------------------------------------------------
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class ExtentStripeAlloc
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{
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public:
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public:
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/** @brief Constructor
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* @param tableOID OID of table for which extents will be allocated.
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* @param logger Log object used for debug logging.
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*/
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ExtentStripeAlloc(OID tableOID, Log* logger);
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/** @brief Constructor
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* @param tableOID OID of table for which extents will be allocated.
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* @param logger Log object used for debug logging.
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*/
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ExtentStripeAlloc ( OID tableOID,
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Log* logger );
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/** @brief Destructor
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*/
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~ExtentStripeAlloc();
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/** @brief Destructor
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*/
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~ExtentStripeAlloc( );
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/** @brief Add the specified column to our "stripe" of extents to allocate.
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* @param colOID Column OID to be added to extent allocation list.
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* @param colWidth Width of column associated with colOID.
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*/
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void addColumn(OID colOID, int colWidth);
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/** @brief Add the specified column to our "stripe" of extents to allocate.
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* @param colOID Column OID to be added to extent allocation list.
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* @param colWidth Width of column associated with colOID.
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*/
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void addColumn( OID colOID,
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int colWidth );
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/** @brief Request an extent allocation for the specified OID and DBRoot.
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* A "stripe" of extents for the corresponding table will be allocated
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* if no extent exists to satisfy the request; else the previously
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* allocated extent will be returned.
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* @param oid Column OID extent to be allocated
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* @param dbRoot Requested DBRoot for the new extent
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* @param partNum (in/out) Partition number of the allocated extent,
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* Input if empty DBRoot, else only used as output.
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* @param segNum (out) Segment number of the allocated extent
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* @param startLbid (out) Starting LBID of the allocated extent
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* @param allocSize (out) Number of blocks in the allocated extent
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* @param hwm (out) Starting FBO or hwm for the allocated extent
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* @param errMsg (out) Error msg associated with the extent allocation
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* @return NO_ERROR returned upon success
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*/
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int allocateExtent(OID oid, uint16_t dbRoot, uint32_t& partNum, uint16_t& segNum, BRM::LBID_t& startLbid,
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int& allocSize, HWM& hwm, std::string& errMsg);
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/** @brief Request an extent allocation for the specified OID and DBRoot.
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* A "stripe" of extents for the corresponding table will be allocated
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* if no extent exists to satisfy the request; else the previously
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* allocated extent will be returned.
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* @param oid Column OID extent to be allocated
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* @param dbRoot Requested DBRoot for the new extent
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* @param partNum (in/out) Partition number of the allocated extent,
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* Input if empty DBRoot, else only used as output.
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* @param segNum (out) Segment number of the allocated extent
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* @param startLbid (out) Starting LBID of the allocated extent
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* @param allocSize (out) Number of blocks in the allocated extent
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* @param hwm (out) Starting FBO or hwm for the allocated extent
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* @param errMsg (out) Error msg associated with the extent allocation
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* @return NO_ERROR returned upon success
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*/
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int allocateExtent( OID oid,
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uint16_t dbRoot,
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uint32_t& partNum,
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uint16_t& segNum,
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BRM::LBID_t& startLbid,
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int& allocSize,
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HWM& hwm,
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std::string& errMsg );
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/** @brief Debug print function.
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*/
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void print();
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/** @brief Debug print function.
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*/
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void print( );
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private:
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OID fTableOID; // Table extents to be allocated
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Log* fLog; // Log used for debug logging
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unsigned int fStripeCount; // Extent "stripe" counter
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boost::mutex fMapMutex; // protects unordered map access
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std::vector<OID> fColOIDs; // Vector of column OIDs
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std::vector<int> fColWidths; // Widths associated with fColOIDs
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private:
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OID fTableOID; // Table extents to be allocated
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Log* fLog; // Log used for debug logging
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unsigned int fStripeCount; // Extent "stripe" counter
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boost::mutex fMapMutex; // protects unordered map access
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std::vector<OID> fColOIDs; // Vector of column OIDs
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std::vector<int> fColWidths; // Widths associated with fColOIDs
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// unordered map where we collect the allocated extents
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std::tr1::unordered_multimap<OID, AllocExtEntry, AllocExtHasher> fMap;
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// unordered map where we collect the allocated extents
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std::tr1::unordered_multimap<OID, AllocExtEntry, AllocExtHasher> fMap;
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// disable copy constructor and assignment operator
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ExtentStripeAlloc(const ExtentStripeAlloc&);
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ExtentStripeAlloc& operator=(const ExtentStripeAlloc&);
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// disable copy constructor and assignment operator
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ExtentStripeAlloc(const ExtentStripeAlloc&);
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ExtentStripeAlloc& operator=(const ExtentStripeAlloc&);
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};
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} //end of namespace
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} // namespace WriteEngine
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