XrdSfsXio Class Reference
#include <XrdSfsXio.hh>
List of all members.
Constructor & Destructor Documentation
Constructor and destructor
- Parameters:
-
| xioimpl | Reference to static method implementations. |
virtual XrdSfsXio::~XrdSfsXio |
( |
|
) |
[inline, virtual] |
Constructor and destructor.
Member Function Documentation
static char* XrdSfsXio::Buffer |
( |
XrdSfsXioHandle |
theHand, |
|
|
int * |
buffsz = 0 | |
|
) |
| | [static] |
Get the address and size of the buffer associated with a handle.
- Parameters:
-
| theHand | - The handle associated with the buffer. |
| buffsz | - If not nil, the size of the buffer is returned. The size will always be >= to the original data length. |
- Returns:
- A pointer to the buffer.
Reimplemented in XrdXrootdProtocol.
virtual XrdSfsXioHandle XrdSfsXio::Claim |
( |
const char * |
curBuff, |
|
|
int |
datasz, |
|
|
int |
minasz | |
|
) |
| | [pure virtual] |
Claim ownership of the current buffer if it is memory effecient to do so.
- Parameters:
-
| curBuff | - The address of the current buffer. It must match the the buffer that was most recently passed to the caller. |
| datasz | - Number of useful bytes in the buffer (i.e. write size). |
| minasz | - Minimum buffer size that would be allocated to copy data. |
- Returns:
- !0 The buffer handle of the current buffer is returned along with ownership rights.
-
=0 Too much memory would be wasted by transferring ownership (errno == 0) or an error ocurred (errno != 0). When an error see Swap() below for possible types of errors.
Implemented in XrdXrootdProtocol.
Return a buffer previously gotten from a Claim() or Swap() call.
- Parameters:
-
| theHand | - The handle associated with the buffer. |
Reimplemented in XrdXrootdProtocol.
Swap the current I/O buffer
- Parameters:
-
| curBuff | - The address of the current buffer. It must match the the buffer that was most recently passed to the caller. |
| oldHand | - The handle associated with a buffer returned by a previous call to Swap(). A value of zero indicates that the caller is taking control of the buffer but has no replacement buffer. |
- Returns:
- !0 The buffer handle of the current buffer is returned along with ownership rights. If oldHand was not nil, the caller's ownership of the associated buffer is reclaimed.
-
=0 An error occurred and nothing has changed; errno holds the reason for the error. Typically, EINVAL - curBuff doe not match current buffer. ENOBUFS - not enough memory to give up buffer. ENOTSUP - unsupported context for call.
Implemented in XrdXrootdProtocol.
The documentation for this class was generated from the following file: