xxq250
/
homework-jianmu
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

more TDB

This commit is contained in:
Hongze Cheng 2022-03-09 03:18:31 +00:00
parent dcdc577b12
commit 546bf6acdb
4 changed files with 37 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
source/libs/tdb/src/db/tdbBtree.c
View File

@ -450,12 +450,14 @@ static int tdbBtreeBalanceDeeper(SBTree *pBt, SPage *pRoot, SPage **ppChild) {
return 0;
}
static int tdbBtreeBalanceNonRoot(SBTree *pBt, SPage *pParent, bool isRoot) {
#if 0
int i;
static int tdbBtreeBalanceNonRoot(SBTree *pBt, SPage *pParent, int idx, bool isRoot) {
int nOldPages;
SPage *pOldPages[3];
int nNewPages;
SPage *pNewPages[5];
// Find three or less sibling pages
i = pParent->pPageHdr->nCells + pParent->nOverFlow;
#endif
/* TODO */
return 0;
}
@ -500,7 +502,7 @@ static int tdbBtreeBalance(SBtCursor *pCur) {
// Generalized balance step
pParent = pCur->pgStack[pCur->iPage - 1];
ret = tdbBtreeBalanceNonRoot(pCur->pBt, pParent, (iPage == 1));
ret = tdbBtreeBalanceNonRoot(pCur->pBt, pParent, pCur->idxStack[pCur->iPage - 1], (iPage == 1));
if (ret < 0) {
return -1;
}

2
source/libs/tdb/src/db/tdbPCache.c
View File

@ -188,7 +188,7 @@ static void tdbPCacheUnpinPage(SPage *pPage) {
tdbPCacheLock(pCache);
nRef = TDB_PAGE_REF(pPage);
nRef = TDB_GET_PAGE_REF(pPage);
ASSERT(nRef >= 0);
if (nRef == 0) {
// Add the page to LRU list

16
source/libs/tdb/src/db/tdbPage.c Normal file
View File

@ -0,0 +1,16 @@
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "tdbInt.h"

7
source/libs/tdb/src/inc/tdbPage.h
View File

@ -52,6 +52,7 @@ struct SPage {
int vLen;
int maxLocal;
int minLocal;
int nOverflow;
};
// For page lock
@ -76,16 +77,16 @@ struct SPage {
ret; \
})
// For page ref (TODO: Need atomic operation)
// For page ref
#define TDB_INIT_PAGE_REF(pPage) ((pPage)->nRef = 0)
#if 0
#define TDB_REF_PAGE(pPage) (++(pPage)->nRef)
#define TDB_UNREF_PAGE(pPage) (--(pPage)->nRef)
#define TDB_PAGE_REF(pPage) ((pPage)->nRef)
#define TDB_GET_PAGE_REF(pPage) ((pPage)->nRef)
#else
#define TDB_REF_PAGE(pPage) atomic_add_fetch_32(&((pPage)->nRef), 1)
#define TDB_UNREF_PAGE(pPage) atomic_sub_fetch_32(&((pPage)->nRef), 1)
#define TDB_PAGE_REF(pPage) atomic_load_32(&((pPage)->nRef))
#define TDB_GET_PAGE_REF(pPage) atomic_load_32(&((pPage)->nRef))
#endif
#ifdef __cplusplus