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/* Copyright (c) 2003, 2005, 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#ifndef FS_READWRITEREQ_H
#define FS_READWRITEREQ_H
#include "SignalData.hpp"
/**
* FsReadWriteReq - Common signal class for FSWRITEREQ and FSREADREQ
*
*/
/**
*
* SENDER:
* RECIVER: Ndbfs
*/
class FsReadWriteReq {
/**
* Reciver(s)
*/
friend class Ndbfs;
friend class VoidFs;
friend class AsyncFile;
/**
* Sender(s)
*/
friend class Dbdict;
friend class Lgman;
friend class Tsman;
friend class Pgman;
friend class Restore;
/**
* For printing
*/
friend bool printFSREADWRITEREQ(FILE * output, const Uint32 * theData, Uint32 len, Uint16 receiverBlockNo);
public:
/**
* Enum type for errorCode
*/
enum NdbfsFormatType {
fsFormatListOfPairs=0,
fsFormatArrayOfPages=1,
fsFormatListOfMemPages=2,
fsFormatGlobalPage=3,
fsFormatSharedPage=4,
fsFormatMax
};
/**
* Length of signal
*/
STATIC_CONST( FixedLength = 6 );
private:
/**
* DATA VARIABLES
*/
UintR filePointer; // DATA 0
UintR userReference; // DATA 1
UintR userPointer; // DATA 2
UintR operationFlag; // DATA 3
UintR varIndex; // DATA 4
UintR numberOfPages; // DATA 5
//-------------------------------------------------------------
// Variable sized part. Those will contain
// info about memory/file pages to read/write
//-------------------------------------------------------------
union {
UintR pageData[16]; // DATA 6 - 21
struct {
Uint32 varIndex; // In unit cluster size
Uint32 fileOffset; // In unit page size
} listOfPair[8];
struct {
Uint32 varIndex;
Uint32 fileOffset;
} arrayOfPages;
struct {
Uint32 varIndex[1]; // Size = numberOfPages
Uint32 fileOffset;
} listOfMemPages;
} data;
static Uint8 getSyncFlag(const UintR & opFlag);
static void setSyncFlag(UintR & opFlag, Uint8 flag);
static NdbfsFormatType getFormatFlag(const UintR & opFlag);
static void setFormatFlag(UintR & opFlag, Uint8 flag);
static Uint32 getPartialReadFlag(UintR opFlag);
static void setPartialReadFlag(UintR & opFlag, Uint32 flag);
};
/**
* Operation flag
*
f = Format of pageData - 4 Bits -> max 15
s = sync after write flag - 1 Bit
1111111111222222222233
01234567890123456789012345678901
ffffs
*/
#define SYNC_SHIFT (4)
#define SYNC_MASK (0x01)
#define FORMAT_MASK (0x0F)
#define PARTIAL_READ_SHIFT (5)
inline
Uint8
FsReadWriteReq::getSyncFlag(const UintR & opFlag){
return (Uint8)((opFlag >> SYNC_SHIFT) & SYNC_MASK);
}
inline
FsReadWriteReq::NdbfsFormatType
FsReadWriteReq::getFormatFlag(const UintR & opFlag){
return (NdbfsFormatType)(opFlag & FORMAT_MASK);
}
inline
void
FsReadWriteReq::setSyncFlag(UintR & opFlag, Uint8 flag){
ASSERT_BOOL(flag, "FsReadWriteReq::setSyncFlag");
opFlag |= (flag << SYNC_SHIFT);
}
inline
void
FsReadWriteReq::setFormatFlag(UintR & opFlag, Uint8 flag){
ASSERT_MAX(flag, fsFormatMax, "FsReadWriteReq::setSyncFlag");
opFlag |= flag;
}
inline
void
FsReadWriteReq::setPartialReadFlag(UintR & opFlag, Uint32 flag){
ASSERT_BOOL(flag, "FsReadWriteReq::setSyncFlag");
opFlag |= (flag << PARTIAL_READ_SHIFT);
}
inline
Uint32
FsReadWriteReq::getPartialReadFlag(UintR opFlag){
return (opFlag >> PARTIAL_READ_SHIFT) & 1;
}
#endif
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