File_Namespace::Page Struct Reference

A logical page (Page) belongs to a file on disk. More...

#include <Page.h>

Public Member Functions
	Page (int32_t fileId, size_t pageNum)
	page number More...
	Page ()
bool	isValid ()
bool	operator< (const Page other) const

Public Attributes
int32_t	fileId
size_t	pageNum
	unique identifier of the owning file More...

Detailed Description

A logical page (Page) belongs to a file on disk.

A Page struct stores the file id for the file it belongs to, and it stores its page number and number of used bytes within the page.

Note: the number of used bytes should not be greater than the page size. The page size is determined by the containing file.

Definition at line 46 of file Page.h.

Constructor & Destructor Documentation

File_Namespace::Page::Page ( int32_t  fileId, size_t  pageNum  )

inline

page number

Constructor

Definition at line 51 of file Page.h.

: fileId(fileId), pageNum(pageNum) {}

File_Namespace::Page::Page ( )

inline

Definition at line 52 of file Page.h.

: fileId(-1), pageNum(0) {}

Member Function Documentation

bool File_Namespace::Page::isValid ( )

inline

Definition at line 54 of file Page.h.

References fileId.

{ return fileId >= 0; }

bool File_Namespace::Page::operator< ( const Page  other ) const

inline

Definition at line 56 of file Page.h.

References fileId, and pageNum.

                                         {
    if (fileId != other.fileId) {
      return fileId < other.fileId;
    }
    return pageNum < other.pageNum;
  }

Member Data Documentation

int32_t File_Namespace::Page::fileId

Definition at line 47 of file Page.h.

Referenced by File_Namespace::FileBuffer::append(), File_Namespace::FileBuffer::copyPage(), File_Namespace::FileMgr::copyPage(), File_Namespace::FileMgr::copyPageWithoutHeaderSize(), File_Namespace::FileMgr::copySourcePageForCompaction(), File_Namespace::FileBuffer::freePage(), File_Namespace::FileBuffer::initMetadataAndPageDataSize(), isValid(), operator<(), File_Namespace::FileBuffer::readMetadata(), File_Namespace::FileMgr::sortAndCopyFilePagesForCompaction(), File_Namespace::FileBuffer::write(), File_Namespace::FileBuffer::writeHeader(), and File_Namespace::FileBuffer::writeMetadata().

size_t File_Namespace::Page::pageNum

unique identifier of the owning file

Definition at line 48 of file Page.h.

Referenced by File_Namespace::FileBuffer::append(), File_Namespace::FileBuffer::copyPage(), File_Namespace::FileMgr::copyPage(), File_Namespace::FileMgr::copyPageWithoutHeaderSize(), File_Namespace::FileMgr::copySourcePageForCompaction(), File_Namespace::FileBuffer::freePage(), operator<(), File_Namespace::FileBuffer::readMetadata(), File_Namespace::FileBuffer::write(), File_Namespace::FileBuffer::writeHeader(), and File_Namespace::FileBuffer::writeMetadata().

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The documentation for this struct was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/DataMgr/FileMgr/Page.h