xrootd
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Downloads original file into a single file on local disk. Handles read requests as they come along. More...
#include <XrdPfcIOFile.hh>
Public Member Functions | |
IOFile (XrdOucCacheIO *io, Cache &cache) | |
~IOFile () | |
bool | HasFile () const |
Check if File was opened successfully. | |
int | Read (char *buff, long long off, int size) override |
Pass Read request to the corresponding File object. | |
void | Read (XrdOucCacheIOCB &iocb, char *buff, long long off, int size) override |
void | pgRead (XrdOucCacheIOCB &iocb, char *buff, long long off, int size, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) override |
int | ReadV (const XrdOucIOVec *readV, int n) override |
Pass ReadV request to the corresponding File object. | |
void | ReadV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int n) override |
void | Update (XrdOucCacheIO &iocp) override |
bool | ioActive () override |
Abstract virtual method of XrdPfc::IO Called to check if destruction needs to be done in a separate task. | |
void | DetachFinalize () override |
Abstract virtual method of XrdPfc::IO Called to destruct the IO object after it is no longer used. | |
int | Fstat (struct stat &sbuff) override |
long long | FSize () override |
virtual int | pgRead (char *buff, long long offs, int rdlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | pgRead (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rdlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
Public Member Functions inherited from XrdPfc::IO | |
IO (XrdOucCacheIO *io, Cache &cache) | |
virtual XrdOucCacheIO * | Base () |
Original data source. | |
const char * | Path () override |
Original data source URL. | |
int | Sync () override |
int | Trunc (long long Offset) override |
int | Write (char *Buffer, long long Offset, int Length) override |
bool | Detach (XrdOucCacheIOCD &iocdP) final |
const char * | GetLocation () |
XrdSysTrace * | GetTrace () |
XrdOucCacheIO * | GetInput () |
virtual int | Sync ()=0 |
virtual void | Sync (XrdOucCacheIOCB &iocb) |
virtual int | Trunc (long long offs)=0 |
virtual void | Trunc (XrdOucCacheIOCB &iocb, long long offs) |
virtual int | Write (char *buff, long long offs, int wlen)=0 |
virtual void | Write (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen) |
Public Member Functions inherited from XrdOucCacheIO | |
virtual const char * | Location (bool refresh=false) |
virtual int | pgWrite (char *buff, long long offs, int wrlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | pgWrite (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wrlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | Preread (long long offs, int rlen, int opts=0) |
virtual void | Preread (aprParms &Parms) |
virtual int | WriteV (const XrdOucIOVec *writV, int wnum) |
virtual void | WriteV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *writV, int wnum) |
XrdOucCacheIO () | |
Construct and Destructor. | |
Private Member Functions | |
int | ReadBegin (char *buff, long long off, int size, ReadReqRH *rh) |
int | ReadEnd (int retval, ReadReqRH *rh) |
int | ReadVBegin (const XrdOucIOVec *readV, int n, ReadReqRH *rh) |
int | ReadVEnd (int retval, ReadReqRH *rh) |
int | initCachedStat () |
Private Attributes | |
File * | m_file |
struct stat * | m_localStat |
Additional Inherited Members | |
Static Public Attributes inherited from XrdOucCacheIO | |
static const uint64_t | forceCS = 0x0000000000000001ULL |
static const int | SingleUse = 0x0001 |
Mark pages for single use. | |
Protected Member Functions inherited from XrdPfc::IO | |
const char * | GetPath () |
std::string | GetFilename () |
const char * | RefreshLocation () |
unsigned short | ObtainReadSid () |
Protected Member Functions inherited from XrdOucCacheIO | |
virtual | ~XrdOucCacheIO () |
Protected Attributes inherited from XrdPfc::IO | |
Cache & | m_cache |
reference to Cache object | |
const char * | m_traceID |
RAtomic_int | m_active_read_reqs |
number of active read requests | |
Downloads original file into a single file on local disk. Handles read requests as they come along.
XrdPfc::IOFile::IOFile | ( | XrdOucCacheIO * | io, |
Cache & | cache | ||
) |
XrdPfc::IOFile::~IOFile | ( | ) |
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overridevirtual |
Abstract virtual method of XrdPfc::IO Called to destruct the IO object after it is no longer used.
Implements XrdPfc::IO.
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overridevirtual |
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overridevirtual |
Perform an fstat() operation (defaults to passthrough).
sbuff | reference to the stat buffer to be filled in. Only fields st_size, st_blocks, st_mtime (st_atime and st_ctime may be set to st_mtime), st_ino, and st_mode need to be set. All other fields are preset and should not be changed. |
Reimplemented from XrdOucCacheIO.
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inline |
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private |
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overridevirtual |
Abstract virtual method of XrdPfc::IO Called to check if destruction needs to be done in a separate task.
Implements XrdPfc::IO.
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virtual |
Reimplemented from XrdOucCacheIO.
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overridevirtual |
Read file pages and checksums using asynchronous I/O (default sync).
iocb | reference to the callback object that receives the result. All results are returned via this object's Done() method. If the caller holds any locks they must be recursive locks as the callback may occur on the calling thread. |
buff | pointer to buffer where the bytes are to be placed. |
offs | The offset where the read is to start. |
rdlen | The number of bytes to read. |
csvec | A vector which will be filled with the corresponding CRC32C checksum for each page or page segment. |
opts | Processing options: forceCS - always return checksums even when not available. |
csfix | When not nil, returns the number of corrected checksum errs. |
Reimplemented from XrdOucCacheIO.
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inlinevirtual |
Read file pages and checksums using asynchronous I/O (default sync).
iocb | reference to the callback object that receives the result. All results are returned via this object's Done() method. If the caller holds any locks they must be recursive locks as the callback may occur on the calling thread. |
buff | pointer to buffer where the bytes are to be placed. |
offs | The offset where the read is to start. |
rdlen | The number of bytes to read. |
csvec | A vector which will be filled with the corresponding CRC32C checksum for each page or page segment. |
opts | Processing options: forceCS - always return checksums even when not available. |
csfix | When not nil, returns the number of corrected checksum errs. |
Reimplemented from XrdOucCacheIO.
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overridevirtual |
Pass Read request to the corresponding File object.
Implements XrdOucCacheIO.
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overridevirtual |
Perform an asynchronous read (defaults to synchronous).
iocb | reference to the callback object that receives the result. All results are returned via this object's Done() method. If the caller holds any locks they must be recursive locks as the callback may occur on the calling thread. |
buff | pointer to the buffer to receive the results. The buffer must remain valid until the callback is invoked. |
offs | the offset into the file. |
rlen | the number of bytes to read. |
Reimplemented from XrdOucCacheIO.
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private |
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private |
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overridevirtual |
Pass ReadV request to the corresponding File object.
Reimplemented from XrdOucCacheIO.
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overridevirtual |
Perform an asynchronous vector read (defaults to synchronous).
iocb | reference to the callback object that receives the result. All results are returned via this object's Done() method. If the caller holds any locks they must be recursive locks as the callback may occur on the calling thread. |
readV | pointer to a vector of read requests. |
rnum | the number of elements in the vector. |
Reimplemented from XrdOucCacheIO.
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private |
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private |
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overridevirtual |
Update the originally passed XrdOucCacheIO object with the object passed. All future uses underlying XrdOucCacheIO object must now use this object. Update() is called when Prepare() indicated that the file should not be physically opened and a file method was invoked in the XrdOucCacheIO passed to Attach(). When this occurs, the file is actually opened and Update() called to replace the original XrdOucCacheIO object with one that uses the newly opened file.
iocp | reference to the new XrdOucCacheIO object. |
Reimplemented from XrdPfc::IO.
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private |