113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
/*
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Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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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; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef REFCONVERT_H
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#define REFCONVERT_H
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#include <assert.h>
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#include "kernel_types.h"
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#include "ndb_limits.h"
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#define JAM_FILE_ID 217
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/*
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* In multithreaded kernel, BlockNumber includes the main block
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* number in lower 9 bits and the instance in upper 7 bits.
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*/
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inline
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BlockNumber blockToMain(Uint32 block){
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assert(block < (1 << 16));
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return (BlockNumber)(block & ((1 << NDBMT_BLOCK_BITS) - 1));
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}
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inline
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BlockInstance blockToInstance(Uint32 block){
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assert(block < (1 << 16));
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return (BlockNumber)(block >> NDBMT_BLOCK_BITS);
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}
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inline
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BlockNumber numberToBlock(Uint32 main, Uint32 instance)
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{
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assert(main < (1 << NDBMT_BLOCK_BITS) &&
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instance < (1 << NDBMT_BLOCK_INSTANCE_BITS));
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return (BlockNumber)(main | (instance << NDBMT_BLOCK_BITS));
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}
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/**
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* Convert BlockReference to NodeId
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*/
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inline
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NodeId refToNode(Uint32 ref){
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return (NodeId)(ref & ((1 << 16) - 1));
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}
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/**
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* Convert BlockReference to full 16-bit BlockNumber.
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*/
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inline
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BlockNumber refToBlock(Uint32 ref){
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return (BlockNumber)(ref >> 16);
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}
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/**
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* Convert BlockReference to main BlockNumber.
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* Used in tests such as: refToMain(senderRef) == DBTC.
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*/
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inline
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BlockNumber refToMain(Uint32 ref){
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return (BlockNumber)((ref >> 16) & ((1 << NDBMT_BLOCK_BITS) - 1));
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}
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/**
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* Convert BlockReference to BlockInstance.
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*/
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inline
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BlockInstance refToInstance(Uint32 ref){
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return (BlockInstance)(ref >> (16 + NDBMT_BLOCK_BITS));
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}
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/**
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* Convert NodeId and BlockNumber to BlockReference
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*/
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inline
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BlockReference numberToRef(Uint32 block, Uint32 node){
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assert(node < (1 << 16) && block < (1 << 16));
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return (BlockReference)(node | (block << 16));
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}
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/**
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* Convert NodeId and block main and instance to BlockReference
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*/
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inline
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BlockReference numberToRef(Uint32 main, Uint32 instance, Uint32 node){
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assert(node < (1 << 16) &&
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main < (1 << NDBMT_BLOCK_BITS) &&
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instance < (1 << NDBMT_BLOCK_INSTANCE_BITS));
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return (BlockReference)(node |
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(main << 16) |
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(instance << (16 + NDBMT_BLOCK_BITS)));
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}
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#undef JAM_FILE_ID
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#endif
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