mirror of
https://github.com/MariaDB/server.git
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152 lines
3.4 KiB
C++
152 lines
3.4 KiB
C++
/* Copyright (C) 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef FS_READWRITEREQ_H
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#define FS_READWRITEREQ_H
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#include "SignalData.hpp"
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/**
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* FsReadWriteReq - Common signal class for FSWRITEREQ and FSREADREQ
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*
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*/
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/**
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*
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* SENDER:
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* RECIVER: Ndbfs
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*/
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class FsReadWriteReq {
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/**
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* Reciver(s)
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*/
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friend class Ndbfs;
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friend class VoidFs;
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/**
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* Sender(s)
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*/
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friend class Dbdict;
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/**
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* For printing
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*/
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friend bool printFSREADWRITEREQ(FILE * output, const Uint32 * theData, Uint32 len, Uint16 receiverBlockNo);
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public:
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/**
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* Enum type for errorCode
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*/
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enum NdbfsFormatType {
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fsFormatListOfPairs=0,
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fsFormatArrayOfPages=1,
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fsFormatListOfMemPages=2,
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fsFormatMax
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};
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/**
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* Length of signal
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*/
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private:
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/**
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* DATA VARIABLES
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*/
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UintR filePointer; // DATA 0
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UintR userReference; // DATA 1
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UintR userPointer; // DATA 2
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UintR operationFlag; // DATA 3
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UintR varIndex; // DATA 4
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UintR numberOfPages; // DATA 5
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//-------------------------------------------------------------
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// Variable sized part. Those will contain
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// info about memory/file pages to read/write
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//-------------------------------------------------------------
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union {
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UintR pageData[16]; // DATA 6 - 21
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struct {
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Uint32 varIndex; // In unit cluster size
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Uint32 fileOffset; // In unit page size
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} listOfPair[8];
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struct {
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Uint32 varIndex;
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Uint32 fileOffset;
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} arrayOfPages;
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struct {
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Uint32 varIndex[1]; // Size = numberOfPages
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Uint32 fileOffset;
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} listOfMemPages;
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} data;
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static Uint8 getSyncFlag(const UintR & opFlag);
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static void setSyncFlag(UintR & opFlag, Uint8 flag);
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static NdbfsFormatType getFormatFlag(const UintR & opFlag);
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static void setFormatFlag(UintR & opFlag, Uint8 flag);
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};
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/**
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* Operation flag
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*
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f = Format of pageData - 4 Bits -> max 15
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s = sync after write flag - 1 Bit
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1111111111222222222233
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01234567890123456789012345678901
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ffffs
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*/
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#define SYNC_SHIFT (4)
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#define SYNC_MASK (0x01)
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#define FORMAT_MASK (0x0F)
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inline
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Uint8
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FsReadWriteReq::getSyncFlag(const UintR & opFlag){
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return (Uint8)((opFlag >> SYNC_SHIFT) & SYNC_MASK);
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}
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inline
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FsReadWriteReq::NdbfsFormatType
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FsReadWriteReq::getFormatFlag(const UintR & opFlag){
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return (NdbfsFormatType)(opFlag & FORMAT_MASK);
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}
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inline
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void
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FsReadWriteReq::setSyncFlag(UintR & opFlag, Uint8 flag){
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ASSERT_BOOL(flag, "FsReadWriteReq::setSyncFlag");
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opFlag |= (flag << SYNC_SHIFT);
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}
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inline
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void
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FsReadWriteReq::setFormatFlag(UintR & opFlag, Uint8 flag){
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ASSERT_MAX(flag, fsFormatMax, "FsReadWriteReq::setSyncFlag");
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opFlag |= flag;
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}
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#endif
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