XrdSfsXioHandle Class Reference

#include <XrdSfsXio.hh>

List of all members.

Public Member Functions

virtual char * Buffer (int **blen=0)=0
virtual void Recycle ()=0
 XrdSfsXioHandle ()
virtual ~XrdSfsXioHandle ()

Detailed Description

XrdSfsXio.hh

This class is used to allow file I/O interfaces to perform exchange buffer I/O in order to minimize data copying. When this feature is enabled, the XrdSfsInterface::setXio() method is called on a newly created XrdSfsFile object. Ideally, all oustanding buffers should be be released when the file is closed. Alternatively, the XrdSfsXioHandle::Recycle() method may be used at any time when it is convenient to do so. For best performance, use XrdSfsXio::Swap() as it provides memory locality and is kind to the cache. Buffer swapping is only supported for file write operations. The XrdSfsXioHandle class describes a handle to a buffer returned by XrdSfsXio::Swap().


Constructor & Destructor Documentation

XrdSfsXioHandle::XrdSfsXioHandle (  )  [inline]
virtual XrdSfsXioHandle::~XrdSfsXioHandle (  )  [inline, virtual]

Member Function Documentation

virtual char* XrdSfsXioHandle::Buffer ( int **  blen = 0  )  [pure virtual]

Obtain te address and, optionally, the length of the associated buffer.

Parameters:
blen When not null will hold the length of the buffer. This is not to be confused with the length of data in the buffer!
Returns:
Pointer to the buffer.
virtual void XrdSfsXioHandle::Recycle (  )  [pure virtual]

Recycle a buffer that was previously given to the caller via XrdSfsXio::Swap(). Use it when future swaps will no longer be requested.


The documentation for this class was generated from the following file:
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Generated on 17 Dec 2019 for xrootd by  doxygen 1.6.1