XrdOucPgrwUtils Class Reference

#include <XrdOucPgrwUtils.hh>

Classes
struct	dataInfo
struct	Layout
	Compute the layout for an iovec that receives network bytes applying. More...

Public Member Functions
	XrdOucPgrwUtils ()
	~XrdOucPgrwUtils ()

Static Public Member Functions
static void	csCalc (const char *data, off_t offs, size_t count, uint32_t *csval)
static void	csCalc (const char *data, off_t offs, size_t count, std::vector< uint32_t > &csvec)
static int	csNum (off_t offs, int count)
	Compute the required size of a checksum vector based on offset & length.
static int	csNum (off_t offs, int count, int &fLen, int &lLen)
	Compute the required size of a checksum vector based on offset & length.
static bool	csVer (dataInfo &dInfo, off_t &bado, int &badc)
static int	recvLayout (Layout &layout, off_t offs, int dlen, int bsz=0)
static int	sendLayout (Layout &layout, off_t offs, int dlen, int bsz=0)

Constructor & Destructor Documentation

XrdOucPgrwUtils()

XrdOucPgrwUtils::XrdOucPgrwUtils ( )

inline

~XrdOucPgrwUtils()

XrdOucPgrwUtils::~XrdOucPgrwUtils ( )

inline

Member Function Documentation

csCalc() [1/2]

static void XrdOucPgrwUtils::csCalc ( const char * data, off_t offs, size_t count, std::vector< uint32_t > & csvec )

static

csCalc() [2/2]

static void XrdOucPgrwUtils::csCalc ( const char * data, off_t offs, size_t count, uint32_t * csval )

static

Compute a CRC32C checksums for a pgRead/pgWrite request.

Parameters

data	Pointer to the data whose checksum it to be computed.
offs	The offset at which the read or write occurs.
count	The number of bytes pointed to by data.
csval	Pointer to a vector to hold individual page checksums. The raw vector must be sized as computed by csNum(). When passed an std::vector, it is done automatically. On return, each element of csval holds the checksum for the associated page.

Referenced by XrdCl::EcHandler::PgWrite().

csNum() [1/2]

static int XrdOucPgrwUtils::csNum ( off_t offs, int count )

static

Compute the required size of a checksum vector based on offset & length.

Parameters

offs	The offset at which the read or write occurs.
count	The number of bytes read or to write.

Returns

The number of checksums that are needed.

Referenced by XrdCl::AsyncPageReader::AsyncPageReader(), and XrdCl::XRootDMsgHandler::XRootDMsgHandler().

csNum() [2/2]

static int XrdOucPgrwUtils::csNum ( off_t offs, int count, int & fLen, int & lLen )

static

Compute the required size of a checksum vector based on offset & length.

and last segments required in the iov vector.

Parameters

offs	The offset at which the read or write occurs.
count	The number of bytes read or to write excluding checksums.
fLen	The number of bytes needed in iov[0].iov_length
lLen	The number of bytes needed in iov[csnum-1].iov_length

Returns

The number of checksums that are needed.

csVer()

static bool XrdOucPgrwUtils::csVer ( dataInfo & dInfo, off_t & bado, int & badc )

static

recvLayout()

static int XrdOucPgrwUtils::recvLayout ( Layout & layout, off_t offs, int dlen, int bsz = 0 )

static

sendLayout()

static int XrdOucPgrwUtils::sendLayout ( Layout & layout, off_t offs, int dlen, int bsz = 0 )

static

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

• XrdOucPgrwUtils.hh