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C++ STORM_PageHandle类代码示例

本文整理汇总了C++中STORM_PageHandle类的典型用法代码示例。如果您正苦于以下问题：C++ STORM_PageHandle类的具体用法？C++ STORM_PageHandle怎么用？C++ STORM_PageHandle使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了STORM_PageHandle类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: CreateLastDataPage

t_rc INXM_IndexHandle::CreateLastDataPage(STORM_PageHandle &pageHandle) {
	t_rc rc;
	int pageID;
	
	rc = this->sfh.ReservePage(pageHandle);
	if (rc != OK) { return rc; }
	
	rc = pageHandle.GetPageID(pageID);
	if (rc != OK) { return rc; }
	
	char *pageData;
	
	rc = pageHandle.GetDataPtr(&pageData);
	if (rc != OK) { return rc; }
	
	/* Write index init page header */
	INXM_InitPageHeader pageHeader = { 1, 0 };
	
	memcpy(pageData, &pageHeader, INXM_INITPAGEHEADER_SIZE);
	
	/* Update file header (new lastDataPage). */
	this->inxmFileHeader.lastDataPage = pageID;
	memcpy(this->pData_FileHeader, &this->inxmFileHeader, INXM_FILEHEADER_SIZE);
	
	rc = this->sfh.FlushPage(this->pageNum_FileHeader);
	if (rc != OK) { return rc; }
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:29，代码来源:INXM_IndexHandle.cpp

示例2: CreateNodePage

t_rc INXM_IndexHandle::CreateNodePage(STORM_PageHandle &pageHandle, int &pageID, int parent, int next, int previous, bool isLeaf) {
	t_rc rc;
	
	rc = this->sfh.ReservePage(pageHandle);
	if (rc != OK) { return rc; }
	
	rc = pageHandle.GetPageID(pageID);
	if (rc != OK) { return rc; }
	
	char *pageData;
	
	rc = pageHandle.GetDataPtr(&pageData);
	if (rc != OK) { return rc; }
	
	/* Write index init page header */
	INXM_InitPageHeader pageHeader = { 0, 0 };
	
	memcpy(pageData, &pageHeader, INXM_INITPAGEHEADER_SIZE);
	
	/* Write index node page header */
	INXM_NodePageHeader nPageHeader = { isLeaf, parent, next, previous };
	
	memcpy(&pageData[INXM_INITPAGEHEADER_SIZE], &nPageHeader, INXM_NODEPAGEHEADER_SIZE);
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:26，代码来源:INXM_IndexHandle.cpp

示例3: ReadRecord

/* We have a const problem with the method. We call GetPage from STORM which is not const!!! */
t_rc REM_RecordFileHandle::ReadRecord(const REM_RecordID &rid, REM_RecordHandle &rh)	{
    /* Check is file is open. */
    if (!this->isOpen) {
        return REM_FHCLOSED;
    }
    t_rc rc;

    /* Get pageID and slot number to find the record. */
    int pageID, slot;

    rc = rid.GetPageID(pageID);
    if (rc != OK) {
        return rc;
    }

    rc = rid.GetSlot(slot);
    if (rc != OK) {
        return rc;
    }

    /* Get the STORM page that contains the record we need. */
    STORM_PageHandle pageHandle;

    rc = this->sfh.GetPage(pageID, pageHandle);
    if (rc != OK) {
        return rc;
    }

    /* Check if REM Record Handler has data. If it doesn't, allocate the needed space. */
    if (rh.pData == NULL) {
        rh.pData = new char[this->remFileHeader.recordSize];
    }
    else {
        delete rh.pData;
        rh.pData = new char[this->remFileHeader.recordSize];
    }

    char *pData;
    REM_PageHeader pageHeader;

    pageHandle.GetDataPtr(&pData);

    /* Check if slot number is not correct. */
    memcpy(&pageHeader, pData, REM_PAGEHEADER_SIZE);
    if (slot > pageHeader.nRecords) {
        return REM_INVALIDRID;
    }

    /* Find the record we want and copy the data to the record handler.  */
    memcpy(rh.pData, &pData[REM_PAGEHEADER_SIZE+((slot-1)*this->remFileHeader.recordSize)], this->remFileHeader.recordSize);

    /* Add the recordID to the record handler. */
    rh.rid = rid;

    /* Make Record Handler valid. */
    rh.isValid = true;

    return (OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:60，代码来源:REM_RecordFileHandle.cpp

示例4: UpdateRecord

t_rc REM_RecordFileHandle::UpdateRecord(const REM_RecordHandle &rh)	{
    /* Check is file is open. */
    if (!this->isOpen) {
        return REM_FHCLOSED;
    }
    t_rc rc;

    /* Exctract RID and get pageID and slot numbers. */
    REM_RecordID rid;
    int pageID, slot;

    rc = rh.GetRecordID(rid);
    if (rc != OK) {
        return rc;
    }

    rc = rid.GetPageID(pageID);
    if (rc != OK) {
        return rc;
    }
    rc = rid.GetSlot(slot);
    if (rc != OK) {
        return rc;
    }

    /* Get the record and a pointer to the data inside. */
    STORM_PageHandle pageHandle;
    char *pData;

    rc = this->sfh.GetPage(pageID, pageHandle);
    if (rc != OK) {
        return rc;
    }

    rc = pageHandle.GetDataPtr(&pData);
    if (rc != OK) {
        return rc;
    }

    /* Copy the new data. */
    memcpy(&pData[REM_PAGEHEADER_SIZE+((slot-1)*this->remFileHeader.recordSize)], rh.pData, this->remFileHeader.recordSize);

    /* Mark the page as dirty because we modified it */
    rc = this->sfh.MarkPageDirty(pageID);
    if (rc != OK) {
        return rc;
    }
    /* Unpin the page */
    rc = this->sfh.UnpinPage(pageID);
    if (rc != OK) {
        return rc;
    }

    return (OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:55，代码来源:REM_RecordFileHandle.cpp

示例5: makeRoot

// Δημιουργία νέου κόμβου/ρίζα
t_rc INXM_IndexHandle::makeRoot(void *pData, const REM_RecordID &rid){
	t_rc rc;
	int pageID;
	STORM_PageHandle myPageHandle;


	// Δέσμευση σελίδας
	rc = this->fh.ReservePage(myPageHandle);
	if (rc != OK) return rc;
	
	rc = this->fh.GetNextPage(this->fileHeaderPageID, myPageHandle);
	if (rc != OK) return rc;

	rc = myPageHandle.GetPageID(pageID);
	if (rc != OK) { return rc; }
	
	char* rData;
	rc = myPageHandle.GetDataPtr(&rData);
	if (rc != OK) { return rc; }

	this->fileHeader.rootPage = pageID;

	// Δημιουργία header για τη σελίδα
	// Κάθε σελίδα είναι και node
	NodeHeader nh;
	nh.numberOfItems = 1;
	for (int i = 0; i < 1200; i++)
		nh.sStatus.set(i,false);
	nh.sStatus.set(0, true);
	nh.left = -1;
	nh.right = -1;
	nh.parent = -1;
	nh.leaf = true;	

	LeafItem item = { pData, rid };
	// Εγγραφή του αντικειμένου
	memcpy(&rData[sizeof(NodeHeader)], this->getLeafItemData(item), this->getLeafItemSize());
	this->fileHeader.numberOfNodes++;
	this->fileHeader.numberOfLeafNodes++;

	// Εγγραφή του nodeheader
	memcpy(&rData[0], &nh, sizeof(NodeHeader));

	rc = this->fh.MarkPageDirty(pageID);
	if (rc != OK) return rc;

	rc = this->fh.FlushPage(pageID);
	if (rc != OK) return rc;

	rc = this->fh.UnpinPage(pageID);
	if (rc != OK) return rc;

	return(OK);
}
开发者ID:evgkanias，项目名称:siren-base，代码行数:55，代码来源:INXM_IndexHandle.cpp

示例6: InsertEntry

t_rc INXM_IndexHandle::InsertEntry(void *pData, const REM_RecordID &rid){
	t_rc rc;
	STORM_PageHandle pageHandle;	
	/* 
	 * Έλεγχος αν υπάρχει δέντρο
	 * Δημιουργία νέου δέντρου/ρίζας
	 */	
	if( this->isOpen && this->fileHeader.numberOfNodes == 0 ){
		makeRoot(pData, rid);
		return(OK);
	}

	/*
	 * Υπάρχει ήδη δέντρο
	 */

	// Αναζήτηση για την εύρεση της ΣΩΣΤΗΣ σελίδας/φύλλου όπου θα μπεί ή νέα εγγραφή
	int rightPageID = searchRightPage( fileHeader.rootPage , pData);
	
	// Διαβάζω τον header αυτής της σελίδας
	
	char* data;

	rc = fh.GetPage(rightPageID, pageHandle);
	if (rc != OK) return rc;

	rc = pageHandle.GetDataPtr(&data);
	if (rc != OK) return rc;

	NodeHeader rightPageHeader;
	memcpy(&rightPageHeader, &data[0], sizeof(NodeHeader));

	// Έλεγχος αν η σελίδα έχει χώρο
	bool freeSpace = checkLeafNodeForSpace(rightPageHeader);

	if(freeSpace){		// περίπτωση που η σελίδα έχει χώρο

		insert(rightPageID, pData, rid);
		return (OK);

	} else {			// περίπτωση που η σελίδα ΔΕΝ έχει χώρο

		rc = splitLeafNode(rightPageID);
		if (rc != OK) return rc;

		int pageAfterSplitID = searchRightPage( fileHeader.rootPage , pData);
		insert(pageAfterSplitID, pData, rid);
		return (OK);

	}
}
开发者ID:evgkanias，项目名称:siren-base，代码行数:51，代码来源:INXM_IndexHandle.cpp

示例7: GetPage

//-----------------------------------------------------------------------------------------------
// GetPage
//
// Updates the page handle with the page with the given pageID
//-----------------------------------------------------------------------------------------------
t_rc STORM_FileHandle::GetPage(int pageID, STORM_PageHandle &pageHandle)
{
	STORM_Frame *pFrame;
	t_rc rc;

	if (!m_isOpened)
		return (STORM_FILENOTOPENED);

	// Check if page is not valid.
	if (pageID < 1)
		return (STORM_INVALIDPAGE);
		
	if (pageID > m_fileSubHeader.numAllocatedPages)
		return (STORM_INVALIDPAGE); 
		
	if (!IsPageReserved(pageID)) 
		return (STORM_INVALIDPAGE);

	rc = m_pBfrMgr->NeedPage(m_fileID, pageID, &pFrame);
	if (rc != OK) return (rc);

	rc = pageHandle.Open(pFrame);
	m_filePos = pageID;

	return (rc);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:31，代码来源:STORM_FileHandle.cpp

示例8: ReservePage

//-----------------------------------------------------------------------------------------------
// ReservePage
//
// Reserves a new page for the file.
//-----------------------------------------------------------------------------------------------
t_rc STORM_FileHandle::ReservePage(STORM_PageHandle &pageHandle)
{
	if (!m_isOpened)
		return (STORM_FILENOTOPENED);

	t_rc rc;
	int newPageID = INVALID_PAGEID; 

	for (int pageCounter=1; pageCounter<=MAX_PAGES_PER_FILE; pageCounter++)
	{
		if (!IsPageReserved(pageCounter))
		{
			newPageID = pageCounter;
			break;
		}
	}

	STORM_Frame *pFrame;

	if (newPageID == INVALID_PAGEID)  // all pages are reserved
	{
		if (m_fileSubHeader.numAllocatedPages == MAX_PAGES_PER_FILE)
			return STORM_FILELIMITREACHED;

		// Reserve frame in buffer.
		rc = m_pBfrMgr->ReserveFrame(m_fileID, newPageID, &pFrame);
		if (rc != OK) return (rc);
		m_fileSubHeader.numAllocatedPages++;
		m_fileSubHeader.numReservedPages++;
		UpdateHeaderFrame();

		rc = m_pBfrMgr->WritePage(pFrame);
		if (rc != OK) return (rc);
	}
	else  // a free page has been found
	{
		// Reserve frame in buffer.
		rc = m_pBfrMgr->ReserveFrame(m_fileID, newPageID, &pFrame);
		if (rc != OK) return (rc);
		m_fileSubHeader.numReservedPages++;
		UpdateHeaderFrame();

		if (newPageID > m_fileSubHeader.numAllocatedPages)
		{
			rc = m_pBfrMgr->WritePage(pFrame);
			if (rc != OK) return (rc);
			m_fileSubHeader.numAllocatedPages++;
			UpdateHeaderFrame();
		}
	}

	SetPageReservationFlag(newPageID, true);  // page is reserved now

	rc = pageHandle.Open(pFrame);
	if (rc != OK) return (rc);

	return (OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:63，代码来源:STORM_FileHandle.cpp

示例9: WriteData

t_rc INXM_IndexHandle::WriteData(STORM_PageHandle pageHandle, const REM_RecordID &rid, int &slot) {
	t_rc rc;
	
	INXM_Data *inxmData = new INXM_Data();
	
	rid.GetPageID(inxmData->pageID);
	rid.GetSlot(inxmData->slot);
	
	char *leafPageData;
	
	rc = pageHandle.GetDataPtr(&leafPageData);
	if (rc != OK) { return rc; }
	
	/* Read leaf header. */
	INXM_InitPageHeader pageHeader;
	
	memcpy(&pageHeader, leafPageData, INXM_INITPAGEHEADER_SIZE);
	
	/* Write data to correct place. */
	memcpy(&leafPageData[INXM_INITPAGEHEADER_SIZE+pageHeader.nItems*INXM_DATA_SIZE], inxmData, INXM_DATA_SIZE);
	
	/* Update page header. */
	slot = pageHeader.nItems;
	pageHeader.nItems++;
	
	memcpy(leafPageData, &pageHeader, INXM_INITPAGEHEADER_SIZE);
	
	int pageID;
	rc = pageHandle.GetPageID(pageID);
	if (rc != OK) { return rc; }
	
	/* Mark the page as dirty because we modified it */
	rc = this->sfh.MarkPageDirty(pageID);
	if (rc != OK) { return rc; }
	
	rc = this->sfh.FlushPage(pageID);
	if (rc != OK) { return rc; }
	
	/* Unpin the page */
	rc = this->sfh.UnpinPage (pageID);
	if (rc != OK) { return rc; }
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:44，代码来源:INXM_IndexHandle.cpp

示例10: WriteNode

t_rc INXM_IndexHandle::WriteNode(STORM_PageHandle pageHandle, int insertPoint, void *key, int left, int slot) {
	t_rc rc;
	INXM_Node *node = new INXM_Node();
	
	node->left = left;
	node->slot = slot;
	
	char *nodePageData;
	
	rc = pageHandle.GetDataPtr(&nodePageData);
	if (rc != OK) { return rc; }
	
	/* Write data to correct place. */
	memcpy(&nodePageData[INXM_INITPAGEHEADER_SIZE+INXM_NODEPAGEHEADER_SIZE+insertPoint*(INXM_NODE_SIZE+this->inxmFileHeader.attrLength)], node, INXM_NODE_SIZE);
	memcpy(&nodePageData[INXM_INITPAGEHEADER_SIZE+INXM_NODEPAGEHEADER_SIZE+insertPoint*(INXM_NODE_SIZE+this->inxmFileHeader.attrLength)+INXM_NODE_SIZE], key, this->inxmFileHeader.attrLength);
	
	/* Update page header. */
	INXM_InitPageHeader pageHeader;
	
	rc = LoadInitHeaders(pageHandle, pageHeader);
	if (rc != OK) { return rc; }
	
	pageHeader.nItems++;
	
	memcpy(nodePageData, &pageHeader, INXM_INITPAGEHEADER_SIZE);
	
	int pageID;
	rc = pageHandle.GetPageID(pageID);
	if (rc != OK) { return rc; }
	
	/* Mark the page as dirty because we modified it */
	rc = this->sfh.MarkPageDirty(pageID);
	if (rc != OK) { return rc; }
	
	rc = this->sfh.FlushPage(pageID);
	if (rc != OK) { return rc; }
	
	/* Unpin the page */
	rc = this->sfh.UnpinPage (pageID);
	if (rc != OK) { return rc; }
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:43，代码来源:INXM_IndexHandle.cpp

示例11: searchRightPage

// Επιστρέφει το id της σελίδας που θα πρέπει να γίνει η
// εισαγωγή του νέου στοιχείου
int INXM_IndexHandle::searchRightPage(int pageID, void* key){

	STORM_PageHandle pageHandle;
	char* data;

	// Διαβάζουμε τον header της σελίδας
	fh.GetPage(pageID, pageHandle);	
	pageHandle.GetDataPtr(&data);

	NodeHeader currentHeader;
	memcpy(&currentHeader, &data[0], sizeof(NodeHeader));

	if( currentHeader.leaf == true ){
		// ο κόμβος που μόλις διάβασα είναι φύλλο, τελειώνει η αναζήτηση
		return pageID;
	} else {
		// ο κόμβος που μόλις διάβασα είναι ενδιάμεσος, ελέγχω τις τιμές
		
		for(int i = 0; i < currentHeader.numberOfItems; i++){	
			InterItem currentItem, nextItem;
			char* currentData = new char[this->getInterItemSize()];

			memcpy(currentData, &data[sizeof(NodeHeader)+i*this->getInterItemSize()], this->getInterItemSize());
			currentItem = this->getInterItemStruct(currentData);

			memcpy(currentData, &data[sizeof(NodeHeader)+(i+1)*this->getInterItemSize()], this->getInterItemSize());
			nextItem = this->getInterItemStruct(currentData);

			if(keyCompare(key, currentItem.key) < 0 ){
				// akoloutha aristero paidi
				searchRightPage(currentItem.leftChild, key);
			} else if ( (keyCompare(key, currentItem.key) > 0) && ((keyCompare(key, nextItem.key) == 0) || (keyCompare(key, nextItem.key) < 0))) {
				// akoloutha aristero paidi
				searchRightPage(nextItem.leftChild, key);
			} else if ((keyCompare(key, currentItem.key) > 0) || (keyCompare(key, currentItem.key) == 0)){
				//akoloutha deksi paidi
				searchRightPage(currentItem.leftChild, key);
			}

		}		
	}
}
开发者ID:evgkanias，项目名称:siren-base，代码行数:44，代码来源:INXM_IndexHandle.cpp

示例12: EditNode

t_rc INXM_IndexHandle::EditNode(STORM_PageHandle pageHandle, int slot, INXM_Node node) {
	t_rc rc;
	
	char *dataPageData;
	
	rc = pageHandle.GetDataPtr(&dataPageData);
	if (rc != OK) { return rc; }
	
	memcpy(&dataPageData[INXM_INITPAGEHEADER_SIZE+INXM_NODEPAGEHEADER_SIZE+(slot*(INXM_NODE_SIZE+this->inxmFileHeader.attrLength))], &node, INXM_NODE_SIZE+this->inxmFileHeader.attrLength);
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:12，代码来源:INXM_IndexHandle.cpp

示例13: EditData

t_rc INXM_IndexHandle::EditData(STORM_PageHandle pageHandle, int slot, INXM_Data data) {
	t_rc rc;
	
	char *dataPageData;
	
	rc = pageHandle.GetDataPtr(&dataPageData);
	if (rc != OK) { return rc; }
	
	memcpy(&dataPageData[INXM_INITPAGEHEADER_SIZE+(slot*INXM_DATA_SIZE)], &data, INXM_DATA_SIZE);
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:12，代码来源:INXM_IndexHandle.cpp

示例14: LoadInitHeaders

t_rc INXM_IndexHandle::LoadInitHeaders(STORM_PageHandle pageHandle, INXM_InitPageHeader &initPageHeader) {
	t_rc rc;
	
	/* Read headers. */
	char *nodePage;
	
	rc = pageHandle.GetDataPtr(&nodePage);
	if (rc != OK) { return rc; }
	
	/* init page header. */	
	memcpy(&initPageHeader, nodePage, INXM_INITPAGEHEADER_SIZE);
	
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:14，代码来源:INXM_IndexHandle.cpp

示例15: ReadData

t_rc INXM_IndexHandle::ReadData(STORM_PageHandle pageHandle, int slot, INXM_Data &data) {
	t_rc rc;
	
	/* Read headers. */
	char *dataPage;
	
	rc = pageHandle.GetDataPtr(&dataPage);
	if (rc != OK) { return rc; }
	
	/* Read data. */
	memcpy(&data, &dataPage[INXM_INITPAGEHEADER_SIZE+slot*INXM_DATA_SIZE], INXM_DATA_SIZE);
		
	return(OK);
}
开发者ID:csdashes，项目名称:DB-Implementation，代码行数:14，代码来源:INXM_IndexHandle.cpp


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