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Merge branch 'feature/tdb' into feature/tdb-merge

This commit is contained in:
Hongze Cheng 2022-03-26 09:50:50 +00:00
parent 6cd165bea7 dbec5f1fa4
commit b646052fb6
22 changed files with 1591 additions and 868 deletions
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1
source/libs/tdb/CMakeLists.txt
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@ -8,7 +8,6 @@ target_sources(tdb
"src/db/tdbBtree.c"
"src/db/tdbDb.c"
"src/db/tdbEnv.c"
# "src/db/tdbPage.c"
"src/page/tdbPage.c"
"src/page/tdbPageL.c"
)

14
source/libs/tdb/src/btree/tdbBtreeBalance.c Normal file
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@ -0,0 +1,14 @@
/*
* 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/>.
*/

14
source/libs/tdb/src/btree/tdbBtreeCommon.c Normal file
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@ -0,0 +1,14 @@
/*
* 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/>.
*/

14
source/libs/tdb/src/btree/tdbBtreeDelete.c Normal file
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@ -0,0 +1,14 @@
/*
* 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/>.
*/

14
source/libs/tdb/src/btree/tdbBtreeInsert.c Normal file
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@ -0,0 +1,14 @@
/*
* 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/>.
*/

27
source/libs/tdb/src/btree/tdbBtreeInt.h Normal file
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@ -0,0 +1,27 @@
/*
* 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/>.
*/
#ifndef _TDB_BTREE_INT_H_
#define _TDB_BTREE_INT_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
#endif /*_TDB_BTREE_INT_H_*/

14
source/libs/tdb/src/btree/tdbBtreeOpen.c Normal file
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@ -0,0 +1,14 @@
/*
* 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/>.
*/

1071
source/libs/tdb/src/db/tdbBtree.c
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File diff suppressed because it is too large Load Diff

66
source/libs/tdb/src/db/tdbDb.c
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@ -15,13 +15,17 @@
#include "tdbInt.h"
struct STDb {
struct STDB {
STEnv *pEnv;
SBTree *pBt;
};
int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDb **ppDb) {
STDb *pDb;
struct STDBC {
SBTC btc;
};
int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDB **ppDb) {
STDB *pDb;
SPager *pPager;
int ret;
char fFullName[TDB_FILENAME_LEN];
@ -30,7 +34,7 @@ int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprF
*ppDb = NULL;
pDb = (STDb *)calloc(1, sizeof(*pDb));
pDb = (STDB *)calloc(1, sizeof(*pDb));
if (pDb == NULL) {
return -1;
}
@ -59,23 +63,23 @@ int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprF
return 0;
}
int tdbDbClose(STDb *pDb) {
int tdbDbClose(STDB *pDb) {
// TODO
return 0;
}
int tdbDbDrop(STDb *pDb) {
int tdbDbDrop(STDB *pDb) {
// TODO
return 0;
}
int tdbDbInsert(STDb *pDb, const void *pKey, int keyLen, const void *pVal, int valLen) {
SBtCursor btc;
SBtCursor *pCur;
int ret;
int tdbDbInsert(STDB *pDb, const void *pKey, int keyLen, const void *pVal, int valLen) {
SBTC btc;
SBTC *pCur;
int ret;
pCur = &btc;
ret = tdbBtreeCursor(pCur, pDb->pBt);
ret = tdbBtcOpen(pCur, pDb->pBt);
if (ret < 0) {
return -1;
}
@ -85,5 +89,45 @@ int tdbDbInsert(STDb *pDb, const void *pKey, int keyLen, const void *pVal, int v
return -1;
}
return 0;
}
int tdbDbGet(STDB *pDb, const void *pKey, int kLen, void **ppVal, int *vLen) {
return tdbBtreeGet(pDb->pBt, pKey, kLen, ppVal, vLen);
}
int tdbDbcOpen(STDB *pDb, STDBC **ppDbc) {
int ret;
STDBC *pDbc = NULL;
*ppDbc = NULL;
pDbc = malloc(sizeof(*pDbc));
if (pDbc == NULL) {
return -1;
}
tdbBtcOpen(&pDbc->btc, pDb->pBt);
// TODO: move to first now, we can move to any key-value
// and in any direction, design new APIs.
ret = tdbBtcMoveToFirst(&pDbc->btc);
if (ret < 0) {
ASSERT(0);
return -1;
}
*ppDbc = pDbc;
return 0;
}
int tdbDbNext(STDBC *pDbc, void **ppKey, int *kLen, void **ppVal, int *vLen) {
return tdbBtreeNext(&pDbc->btc, ppKey, kLen, ppVal, vLen);
}
int tdbDbcClose(STDBC *pDbc) {
if (pDbc) {
free(pDbc);
}
return 0;
}

61
source/libs/tdb/src/db/tdbPCache.c
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@ -53,12 +53,10 @@ static void tdbPCacheLock(SPCache *pCache);
static void tdbPCacheUnlock(SPCache *pCache);
static bool tdbPCacheLocked(SPCache *pCache);
static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, bool alcNewPage);
static void tdbPCachePinPage(SPage *pPage);
static void tdbPCacheRemovePageFromHash(SPage *pPage);
static void tdbPCacheAddPageToHash(SPage *pPage);
static void tdbPCacheUnpinPage(SPage *pPage);
static void *tdbOsMalloc(void *arg, size_t size);
static void tdbOsFree(void *arg, void *ptr);
static void tdbPCachePinPage(SPCache *pCache, SPage *pPage);
static void tdbPCacheRemovePageFromHash(SPCache *pCache, SPage *pPage);
static void tdbPCacheAddPageToHash(SPCache *pCache, SPage *pPage);
static void tdbPCacheUnpinPage(SPCache *pCache, SPage *pPage);
int tdbPCacheOpen(int pageSize, int cacheSize, SPCache **ppCache) {
SPCache *pCache;
@ -102,7 +100,7 @@ SPage *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, bool alcNewPage) {
return pPage;
}
void tdbPCacheRelease(SPage *pPage) {
void tdbPCacheRelease(SPCache *pCache, SPage *pPage) {
i32 nRef;
nRef = TDB_UNREF_PAGE(pPage);
@ -110,7 +108,7 @@ void tdbPCacheRelease(SPage *pPage) {
if (nRef == 0) {
if (1 /*TODO: page still clean*/) {
tdbPCacheUnpinPage(pPage);
tdbPCacheUnpinPage(pCache, pPage);
} else {
// TODO
ASSERT(0);
@ -144,7 +142,7 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, bool alcNe
if (pPage || !alcNewPage) {
if (pPage) {
tdbPCachePinPage(pPage);
tdbPCachePinPage(pCache, pPage);
}
return pPage;
}
@ -160,8 +158,8 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, bool alcNe
// 3. Try to Recycle a page
if (!pPage && !pCache->lru.pLruPrev->isAnchor) {
pPage = pCache->lru.pLruPrev;
tdbPCacheRemovePageFromHash(pPage);
tdbPCachePinPage(pPage);
tdbPCacheRemovePageFromHash(pCache, pPage);
tdbPCachePinPage(pCache, pPage);
}
// 4. Try a stress allocation (TODO)
@ -173,16 +171,13 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, bool alcNe
memcpy(&(pPage->pgid), pPgid, sizeof(*pPgid));
pPage->pLruNext = NULL;
pPage->pPager = NULL;
tdbPCacheAddPageToHash(pPage);
tdbPCacheAddPageToHash(pCache, pPage);
}
return pPage;
}
static void tdbPCachePinPage(SPage *pPage) {
SPCache *pCache;
pCache = pPage->pCache;
static void tdbPCachePinPage(SPCache *pCache, SPage *pPage) {
if (!PAGE_IS_PINNED(pPage)) {
pPage->pLruPrev->pLruNext = pPage->pLruNext;
pPage->pLruNext->pLruPrev = pPage->pLruPrev;
@ -192,11 +187,8 @@ static void tdbPCachePinPage(SPage *pPage) {
}
}
static void tdbPCacheUnpinPage(SPage *pPage) {
SPCache *pCache;
i32 nRef;
pCache = pPage->pCache;
static void tdbPCacheUnpinPage(SPCache *pCache, SPage *pPage) {
i32 nRef;
tdbPCacheLock(pCache);
@ -217,12 +209,10 @@ static void tdbPCacheUnpinPage(SPage *pPage) {
tdbPCacheUnlock(pCache);
}
static void tdbPCacheRemovePageFromHash(SPage *pPage) {
SPCache *pCache;
SPage **ppPage;
int h;
static void tdbPCacheRemovePageFromHash(SPCache *pCache, SPage *pPage) {
SPage **ppPage;
int h;
pCache = pPage->pCache;
h = PCACHE_PAGE_HASH(&(pPage->pgid));
for (ppPage = &(pCache->pgHash[h % pCache->nHash]); *ppPage != pPage; ppPage = &((*ppPage)->pHashNext))
;
@ -232,11 +222,9 @@ static void tdbPCacheRemovePageFromHash(SPage *pPage) {
pCache->nPage--;
}
static void tdbPCacheAddPageToHash(SPage *pPage) {
SPCache *pCache;
int h;
static void tdbPCacheAddPageToHash(SPCache *pCache, SPage *pPage) {
int h;
pCache = pPage->pCache;
h = PCACHE_PAGE_HASH(&(pPage->pgid)) % pCache->nHash;
pPage->pHashNext = pCache->pgHash[h];
@ -257,7 +245,7 @@ static int tdbPCacheOpenImpl(SPCache *pCache) {
pCache->nFree = 0;
pCache->pFree = NULL;
for (int i = 0; i < pCache->cacheSize; i++) {
ret = tdbPageCreate(pCache->pageSize, &pPage, tdbOsMalloc, NULL);
ret = tdbPageCreate(pCache->pageSize, &pPage, NULL, NULL);
if (ret < 0) {
// TODO: handle error
return -1;
@ -266,7 +254,6 @@ static int tdbPCacheOpenImpl(SPCache *pCache) {
// pPage->pgid = 0;
pPage->isAnchor = 0;
pPage->isLocalPage = 1;
pPage->pCache = pCache;
TDB_INIT_PAGE_REF(pPage);
pPage->pHashNext = NULL;
pPage->pLruNext = NULL;
@ -297,13 +284,3 @@ static int tdbPCacheOpenImpl(SPCache *pCache) {
}
int tdbPCacheGetPageSize(SPCache *pCache) { return pCache->pageSize; }
static void *tdbOsMalloc(void *arg, size_t size) {
void *ptr;
ptr = malloc(size);
return ptr;
}
static void tdbOsFree(void *arg, void *ptr) { free(ptr); }

253
source/libs/tdb/src/db/tdbPage.c
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@ -1,253 +0,0 @@
/*
* 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"
typedef struct __attribute__((__packed__)) {
u8 szCell[2];
u8 nxOffset[2];
} SFreeCell;
typedef struct __attribute__((__packed__)) {
u8 szCell[3];
u8 nxOffset[3];
} SFreeCellL;
/* For small page */
#define TDB_SPAGE_FREE_CELL_SIZE_PTR(PCELL) (((SFreeCell *)(PCELL))->szCell)
#define TDB_SPAGE_FREE_CELL_NXOFFSET_PTR(PCELL) (((SFreeCell *)(PCELL))->nxOffset)
#define TDB_SPAGE_FREE_CELL_SIZE(PCELL) ((u16 *)TDB_SPAGE_FREE_CELL_SIZE_PTR(PCELL))[0]
#define TDB_SPAGE_FREE_CELL_NXOFFSET(PCELL) ((u16 *)TDB_SPAGE_FREE_CELL_NXOFFSET_PTR(PCELL))[0]
#define TDB_SPAGE_FREE_CELL_SIZE_SET(PCELL, SIZE) (TDB_SPAGE_FREE_CELL_SIZE(PCELL) = (SIZE))
#define TDB_SPAGE_FREE_CELL_NXOFFSET_SET(PCELL, OFFSET) (TDB_SPAGE_FREE_CELL_NXOFFSET(PCELL) = (OFFSET))
/* For large page */
#define TDB_LPAGE_FREE_CELL_SIZE_PTR(PCELL) (((SFreeCellL *)(PCELL))->szCell)
#define TDB_LPAGE_FREE_CELL_NXOFFSET_PTR(PCELL) (((SFreeCellL *)(PCELL))->nxOffset)
#define TDB_LPAGE_FREE_CELL_SIZE(PCELL) TDB_GET_U24(TDB_LPAGE_FREE_CELL_SIZE_PTR(PCELL))
#define TDB_LPAGE_FREE_CELL_NXOFFSET(PCELL) TDB_GET_U24(TDB_LPAGE_FREE_CELL_NXOFFSET_PTR(PCELL))
#define TDB_LPAGE_FREE_CELL_SIZE_SET(PCELL, SIZE) TDB_PUT_U24(TDB_LPAGE_FREE_CELL_SIZE_PTR(PCELL), SIZE)
#define TDB_LPAGE_FREE_CELL_NXOFFSET_SET(PCELL, OFFSET) TDB_PUT_U24(TDB_LPAGE_FREE_CELL_NXOFFSET_PTR(PCELL), OFFSET)
/* For page */
#define TDB_PAGE_FREE_CELL_SIZE_PTR(PPAGE, PCELL) \
(TDB_IS_LARGE_PAGE(pPage) ? TDB_LPAGE_FREE_CELL_SIZE_PTR(PCELL) : TDB_SPAGE_FREE_CELL_SIZE_PTR(PCELL))
#define TDB_PAGE_FREE_CELL_NXOFFSET_PTR(PPAGE, PCELL) \
(TDB_IS_LARGE_PAGE(pPage) ? TDB_LPAGE_FREE_CELL_NXOFFSET_PTR(PCELL) : TDB_SPAGE_FREE_CELL_NXOFFSET_PTR(PCELL))
#define TDB_PAGE_FREE_CELL_SIZE(PPAGE, PCELL) \
(TDB_IS_LARGE_PAGE(pPage) ? TDB_LPAGE_FREE_CELL_SIZE(PCELL) : TDB_SPAGE_FREE_CELL_SIZE(PCELL))
#define TDB_PAGE_FREE_CELL_NXOFFSET(PPAGE, PCELL) \
(TDB_IS_LARGE_PAGE(pPage) ? TDB_LPAGE_FREE_CELL_NXOFFSET(PCELL) : TDB_SPAGE_FREE_CELL_NXOFFSET(PCELL))
#define TDB_PAGE_FREE_CELL_SIZE_SET(PPAGE, PCELL, SIZE) \
do { \
if (TDB_IS_LARGE_PAGE(PPAGE)) { \
TDB_LPAGE_FREE_CELL_SIZE_SET(PCELL, SIZE); \
} else { \
TDB_SPAGE_FREE_CELL_SIZE_SET(PCELL, SIZE); \
} \
} while (0)
#define TDB_PAGE_FREE_CELL_NXOFFSET_SET(PPAGE, PCELL, OFFSET) \
do { \
if (TDB_IS_LARGE_PAGE(PPAGE)) { \
TDB_LPAGE_FREE_CELL_NXOFFSET_SET(PCELL, OFFSET); \
} else { \
TDB_SPAGE_FREE_CELL_NXOFFSET_SET(PCELL, OFFSET); \
} \
} while (0)
static int tdbPageAllocate(SPage *pPage, int size, SCell **ppCell);
static int tdbPageDefragment(SPage *pPage);
int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t), void *arg) {
SPage *pPage;
u8 *ptr;
int size;
ASSERT(TDB_IS_PGSIZE_VLD(pageSize));
*ppPage = NULL;
size = pageSize + sizeof(*pPage);
ptr = (u8 *)((*xMalloc)(arg, size));
if (pPage == NULL) {
return -1;
}
memset(ptr, 0, size);
pPage = (SPage *)(ptr + pageSize);
pPage->pData = ptr;
pPage->pageSize = pageSize;
if (pageSize < 65536) {
pPage->szOffset = 2;
pPage->szPageHdr = sizeof(SPageHdr);
pPage->szFreeCell = sizeof(SFreeCell);
} else {
pPage->szOffset = 3;
pPage->szPageHdr = sizeof(SPageHdrL);
pPage->szFreeCell = sizeof(SFreeCellL);
}
TDB_INIT_PAGE_LOCK(pPage);
/* TODO */
*ppPage = pPage;
return 0;
}
int tdbPageDestroy(SPage *pPage, void (*xFree)(void *arg, void *ptr), void *arg) {
u8 *ptr;
ptr = pPage->pData;
(*xFree)(arg, ptr);
return 0;
}
int tdbPageInsertCell(SPage *pPage, int idx, SCell *pCell, int szCell) {
int ret;
SCell *pTarget;
u8 *pTmp;
int j;
if (pPage->nOverflow || szCell + pPage->szOffset > pPage->nFree) {
// TODO: need to figure out if pCell may be used by outside of this function
j = pPage->nOverflow++;
pPage->apOvfl[j] = pCell;
pPage->aiOvfl[j] = idx;
} else {
ret = tdbPageAllocate(pPage, szCell, &pTarget);
if (ret < 0) {
return -1;
}
memcpy(pTarget, pCell, szCell);
pTmp = pPage->pCellIdx + idx * pPage->szOffset;
memmove(pTmp + pPage->szOffset, pTmp, pPage->pFreeStart - pTmp - pPage->szOffset);
TDB_PAGE_CELL_OFFSET_AT_SET(pPage, idx, pTarget - pPage->pData);
TDB_PAGE_NCELLS_SET(pPage, TDB_PAGE_NCELLS(pPage) + 1);
}
return 0;
}
int tdbPageDropCell(SPage *pPage, int idx) {
// TODO
return 0;
}
static int tdbPageAllocate(SPage *pPage, int size, SCell **ppCell) {
SCell *pCell;
SFreeCell *pFreeCell;
u8 *pOffset;
int ret;
ASSERT(pPage->nFree > size + pPage->szOffset);
pCell = NULL;
*ppCell = NULL;
// 1. Try to allocate from the free space area
if (pPage->pFreeEnd - pPage->pFreeStart > size + pPage->szOffset) {
pPage->pFreeEnd -= size;
pPage->pFreeStart += pPage->szOffset;
pCell = pPage->pFreeEnd;
}
// 2. Try to allocate from the page free list
if ((pCell == NULL) && (pPage->pFreeEnd - pPage->pFreeStart >= pPage->szOffset) && TDB_PAGE_FCELL(pPage)) {
int szCell;
int nxOffset;
pCell = pPage->pData + TDB_PAGE_FCELL(pPage);
pOffset = TDB_IS_LARGE_PAGE(pPage) ? ((SPageHdrL *)(pPage->pPageHdr))[0].fCell
: (u8 *)&(((SPageHdr *)(pPage->pPageHdr))[0].fCell);
szCell = TDB_PAGE_FREE_CELL_SIZE(pPage, pCell);
nxOffset = TDB_PAGE_FREE_CELL_NXOFFSET(pPage, pCell);
for (;;) {
// Find a cell
if (szCell >= size) {
if (szCell - size >= pPage->szFreeCell) {
SCell *pTmpCell = pCell + size;
TDB_PAGE_FREE_CELL_SIZE_SET(pPage, pTmpCell, szCell - size);
TDB_PAGE_FREE_CELL_NXOFFSET_SET(pPage, pTmpCell, nxOffset);
// TODO: *pOffset = pTmpCell - pPage->pData;
} else {
TDB_PAGE_NFREE_SET(pPage, TDB_PAGE_NFREE(pPage) + szCell - size);
// TODO: *pOffset = nxOffset;
}
break;
}
// Not find a cell yet
if (nxOffset > 0) {
pCell = pPage->pData + nxOffset;
pOffset = TDB_PAGE_FREE_CELL_NXOFFSET_PTR(pPage, pCell);
szCell = TDB_PAGE_FREE_CELL_SIZE(pPage, pCell);
nxOffset = TDB_PAGE_FREE_CELL_NXOFFSET(pPage, pCell);
continue;
} else {
pCell = NULL;
break;
}
}
if (pCell) {
pPage->pFreeStart = pPage->pFreeStart + pPage->szOffset;
}
}
// 3. Try to dfragment and allocate again
if (pCell == NULL) {
ret = tdbPageDefragment(pPage);
if (ret < 0) {
return -1;
}
ASSERT(pPage->pFreeEnd - pPage->pFreeStart > size + pPage->szOffset);
ASSERT(pPage->nFree == pPage->pFreeEnd - pPage->pFreeStart);
// Allocate from the free space area again
pPage->pFreeEnd -= size;
pPage->pFreeStart += pPage->szOffset;
pCell = pPage->pFreeEnd;
}
ASSERT(pCell != NULL);
pPage->nFree = pPage->nFree - size - pPage->szOffset;
*ppCell = pCell;
return 0;
}
static int tdbPageFree(SPage *pPage, int idx, SCell *pCell, int size) {
// TODO
return 0;
}
static int tdbPageDefragment(SPage *pPage) {
// TODO
ASSERT(0);
return 0;
}

4
source/libs/tdb/src/db/tdbPager.c
View File

@ -255,6 +255,10 @@ int tdbPagerNewPage(SPager *pPager, SPgno *ppgno, SPage **ppPage, int (*initPage
return 0;
}
void tdbPagerReturnPage(SPager *pPager, SPage *pPage) {
tdbPCacheRelease(pPager->pCache, pPage);
}
static int tdbPagerAllocFreePage(SPager *pPager, SPgno *ppgno) {
// TODO: Allocate a page from the free list
return 0;

24
source/libs/tdb/src/inc/tdbBtree.h
View File

@ -20,10 +20,15 @@
extern "C" {
#endif
typedef struct SBTree SBTree;
typedef struct SBtCursor SBtCursor;
typedef struct SBTree SBTree;
typedef struct SBTC SBTC;
typedef struct SBtInfo {
SPgno root;
int nLevel;
int nData;
} SBtInfo;
struct SBtCursor {
struct SBTC {
SBTree *pBt;
i8 iPage;
SPage *pPage;
@ -33,10 +38,19 @@ struct SBtCursor {
void *pBuf;
};
// SBTree
int tdbBtreeOpen(int keyLen, int valLen, SPager *pFile, FKeyComparator kcmpr, SBTree **ppBt);
int tdbBtreeClose(SBTree *pBt);
int tdbBtreeCursor(SBtCursor *pCur, SBTree *pBt);
int tdbBtCursorInsert(SBtCursor *pCur, const void *pKey, int kLen, const void *pVal, int vLen);
int tdbBtCursorInsert(SBTC *pCur, const void *pKey, int kLen, const void *pVal, int vLen);
int tdbBtreeGet(SBTree *pBt, const void *pKey, int kLen, void **ppVal, int *vLen);
// SBTC
int tdbBtcOpen(SBTC *pCur, SBTree *pBt);
int tdbBtcMoveToFirst(SBTC *pBtc);
int tdbBtcMoveToLast(SBTC *pBtc);
int tdbBtcMoveTo(SBTC *pBtc, const void *pKey, int kLen);
int tdbBtreeNext(SBTC *pBtc, void **ppKey, int *kLen, void **ppVal, int *vLen);
int tdbBtcClose(SBTC *pBtc);
#ifdef __cplusplus
}

18
source/libs/tdb/src/inc/tdbDb.h
View File

@ -20,12 +20,20 @@
extern "C" {
#endif
typedef struct STDb STDb;
typedef struct STDB STDB;
typedef struct STDBC STDBC;
int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDb **ppDb);
int tdbDbClose(STDb *pDb);
int tdbDbDrop(STDb *pDb);
int tdbDbInsert(STDb *pDb, const void *pKey, int keyLen, const void *pVal, int valLen);
// STDB
int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDB **ppDb);
int tdbDbClose(STDB *pDb);
int tdbDbDrop(STDB *pDb);
int tdbDbInsert(STDB *pDb, const void *pKey, int keyLen, const void *pVal, int valLen);
int tdbDbGet(STDB *pDb, const void *pKey, int kLen, void **ppVal, int *vLen);
// STDBC
int tdbDbcOpen(STDB *pDb, STDBC **ppDbc);
int tdbDbNext(STDBC *pDbc, void **ppKey, int *kLen, void **ppVal, int *vLen);
int tdbDbcClose(STDBC *pDbc);
#ifdef __cplusplus
}

6
source/libs/tdb/src/inc/tdbInt.h
View File

@ -95,7 +95,7 @@ static FORCE_INLINE int tdbCmprPgId(const void *p1, const void *p2) {
// tdb_log
#define tdbError(var)
typedef TD_DLIST(STDb) STDbList;
typedef TD_DLIST(STDB) STDbList;
typedef TD_DLIST(SPgFile) SPgFileList;
typedef TD_DLIST_NODE(SPgFile) SPgFileListNode;
@ -141,8 +141,8 @@ typedef int (*FKeyComparator)(const void *pKey1, int kLen1, const void *pKey2, i
#define TDB_FLAG_IS(flags, flag) ((flags) == (flag))
#define TDB_FLAG_HAS(flags, flag) (((flags) & (flag)) != 0)
#define TDB_FLAG_NO(flags, flag) ((flags) & (flag) == 0)
#define TDB_FLAG_ADD(flags, flag) ((flags) |= (flag))
#define TDB_FLAG_REMOVE(flags, flag) ((flags) &= (~(flag)))
#define TDB_FLAG_ADD(flags, flag) ((flags) | (flag))
#define TDB_FLAG_REMOVE(flags, flag) ((flags) & (~(flag)))
typedef struct SPager SPager;
typedef struct SPCache SPCache;

25
source/libs/tdb/src/inc/tdbPCache.h
View File

@ -21,23 +21,22 @@ extern "C" {
#endif
#define TDB_PCACHE_PAGE \
u8 isAnchor; \
u8 isLocalPage; \
u8 isDirty; \
i32 nRef; \
SPCache *pCache; \
SPage *pFreeNext; \
SPage *pHashNext; \
SPage *pLruNext; \
SPage *pLruPrev; \
SPage *pDirtyNext; \
SPager *pPager; \
SPgid pgid;
u8 isAnchor; \
u8 isLocalPage; \
u8 isDirty; \
i32 nRef; \
SPage *pFreeNext; \
SPage *pHashNext; \
SPage *pLruNext; \
SPage *pLruPrev; \
SPage *pDirtyNext; \
SPager *pPager; \
SPgid pgid;
int tdbPCacheOpen(int pageSize, int cacheSize, SPCache **ppCache);
int tdbPCacheClose(SPCache *pCache);
SPage *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, bool alcNewPage);
void tdbPCacheRelease(SPage *pPage);
void tdbPCacheRelease(SPCache *pCache, SPage *pPage);
int tdbPCacheGetPageSize(SPCache *pCache);
#ifdef __cplusplus

80
source/libs/tdb/src/inc/tdbPage.h
View File

@ -27,9 +27,6 @@ typedef struct {
int szOffset;
int szPageHdr;
int szFreeCell;
// flags
u16 (*getFlags)(SPage *);
void (*setFlags)(SPage *, u16);
// cell number
int (*getCellNum)(SPage *);
void (*setCellNum)(SPage *, int);
@ -45,6 +42,9 @@ typedef struct {
// cell offset at idx
int (*getCellOffset)(SPage *, int);
void (*setCellOffset)(SPage *, int, int);
// free cell info
void (*getFreeCellInfo)(SCell *pCell, int *szCell, int *nxOffset);
void (*setFreeCellInfo)(SCell *pCell, int szCell, int nxOffset);
} SPageMethods;
// Page footer
@ -54,48 +54,27 @@ typedef struct __attribute__((__packed__)) {
struct SPage {
pthread_spinlock_t lock;
u8 *pData;
int pageSize;
u8 *pData;
SPageMethods *pPageMethods;
// Fields below used by pager and am
u8 szAmHdr;
u8 *pPageHdr;
u8 *pAmHdr;
u8 *pCellIdx;
u8 *pFreeStart;
u8 *pFreeEnd;
SPageFtr *pPageFtr;
int kLen; // key length of the page, -1 for unknown
int vLen; // value length of the page, -1 for unknown
int nFree;
int maxLocal;
int minLocal;
int nOverflow;
SCell *apOvfl[4];
int aiOvfl[4];
int kLen; // key length of the page, -1 for unknown
int vLen; // value length of the page, -1 for unknown
int maxLocal;
int minLocal;
int (*xCellSize)(const SPage *, SCell *);
// Fields used by SPCache
TDB_PCACHE_PAGE
};
/* For page */
#define TDB_PAGE_FLAGS(pPage) (*(pPage)->pPageMethods->getFlags)(pPage)
#define TDB_PAGE_NCELLS(pPage) (*(pPage)->pPageMethods->getCellNum)(pPage)
#define TDB_PAGE_CCELLS(pPage) (*(pPage)->pPageMethods->getCellBody)(pPage)
#define TDB_PAGE_FCELL(pPage) (*(pPage)->pPageMethods->getCellFree)(pPage)
#define TDB_PAGE_NFREE(pPage) (*(pPage)->pPageMethods->getFreeBytes)(pPage)
#define TDB_PAGE_CELL_OFFSET_AT(pPage, idx) (*(pPage)->pPageMethods->getCellOffset)(pPage, idx)
#define TDB_PAGE_FLAGS_SET(pPage, FLAGS) (*(pPage)->pPageMethods->setFlags)(pPage, FLAGS)
#define TDB_PAGE_NCELLS_SET(pPage, NCELLS) (*(pPage)->pPageMethods->setCellNum)(pPage, NCELLS)
#define TDB_PAGE_CCELLS_SET(pPage, CCELLS) (*(pPage)->pPageMethods->setCellBody)(pPage, CCELLS)
#define TDB_PAGE_FCELL_SET(pPage, FCELL) (*(pPage)->pPageMethods->setCellFree)(pPage, FCELL)
#define TDB_PAGE_NFREE_SET(pPage, NFREE) (*(pPage)->pPageMethods->setFreeBytes)(pPage, NFREE)
#define TDB_PAGE_CELL_OFFSET_AT_SET(pPage, idx, OFFSET) (*(pPage)->pPageMethods->setCellOffset)(pPage, idx, OFFSET)
#define TDB_PAGE_OFFSET_SIZE(pPage) ((pPage)->pPageMethods->szOffset)
#define TDB_PAGE_CELL_AT(pPage, idx) ((pPage)->pData + TDB_PAGE_CELL_OFFSET_AT(pPage, idx))
// For page lock
#define P_LOCK_SUCC 0
#define P_LOCK_BUSY 1
@ -119,10 +98,43 @@ struct SPage {
})
// APIs
int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t), void *arg);
int tdbPageDestroy(SPage *pPage, void (*xFree)(void *arg, void *ptr), void *arg);
int tdbPageInsertCell(SPage *pPage, int idx, SCell *pCell, int szCell);
int tdbPageDropCell(SPage *pPage, int idx);
#define TDB_PAGE_TOTAL_CELLS(pPage) ((pPage)->nOverflow + (pPage)->pPageMethods->getCellNum(pPage))
#define TDB_PAGE_USABLE_SIZE(pPage) ((u8 *)(pPage)->pPageFtr - (pPage)->pCellIdx)
#define TDB_PAGE_PGNO(pPage) ((pPage)->pgid.pgno)
#define TDB_BYTES_CELL_TAKEN(pPage, pCell) ((*(pPage)->xCellSize)(pPage, pCell) + (pPage)->pPageMethods->szOffset)
#define TDB_PAGE_OFFSET_SIZE(pPage) ((pPage)->pPageMethods->szOffset)
int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t), void *arg);
int tdbPageDestroy(SPage *pPage, void (*xFree)(void *arg, void *ptr), void *arg);
void tdbPageZero(SPage *pPage, u8 szAmHdr, int (*xCellSize)(const SPage *, SCell *));
void tdbPageInit(SPage *pPage, u8 szAmHdr, int (*xCellSize)(const SPage *, SCell *));
int tdbPageInsertCell(SPage *pPage, int idx, SCell *pCell, int szCell, u8 asOvfl);
int tdbPageDropCell(SPage *pPage, int idx);
void tdbPageCopy(SPage *pFromPage, SPage *pToPage);
static inline SCell *tdbPageGetCell(SPage *pPage, int idx) {
SCell *pCell;
int iOvfl;
int lidx;
ASSERT(idx >= 0 && idx < TDB_PAGE_TOTAL_CELLS(pPage));
iOvfl = 0;
for (; iOvfl < pPage->nOverflow; iOvfl++) {
if (pPage->aiOvfl[iOvfl] == idx) {
pCell = pPage->apOvfl[iOvfl];
return pCell;
} else if (pPage->aiOvfl[iOvfl] > idx) {
break;
}
}
lidx = idx - iOvfl;
ASSERT(lidx >= 0 && lidx < pPage->pPageMethods->getCellNum(pPage));
pCell = pPage->pData + pPage->pPageMethods->getCellOffset(pPage, lidx);
return pCell;
}
#ifdef __cplusplus
}

19
source/libs/tdb/src/inc/tdbPager.h
View File

@ -20,15 +20,16 @@
extern "C" {
#endif
int tdbPagerOpen(SPCache *pCache, const char *fileName, SPager **ppPager);
int tdbPagerClose(SPager *pPager);
int tdbPagerOpenDB(SPager *pPager, SPgno *ppgno, bool toCreate);
int tdbPagerWrite(SPager *pPager, SPage *pPage);
int tdbPagerBegin(SPager *pPager);
int tdbPagerCommit(SPager *pPager);
int tdbPagerGetPageSize(SPager *pPager);
int tdbPagerFetchPage(SPager *pPager, SPgno pgno, SPage **ppPage, int (*initPage)(SPage *, void *), void *arg);
int tdbPagerNewPage(SPager *pPager, SPgno *ppgno, SPage **ppPage, int (*initPage)(SPage *, void *), void *arg);
int tdbPagerOpen(SPCache *pCache, const char *fileName, SPager **ppPager);
int tdbPagerClose(SPager *pPager);
int tdbPagerOpenDB(SPager *pPager, SPgno *ppgno, bool toCreate);
int tdbPagerWrite(SPager *pPager, SPage *pPage);
int tdbPagerBegin(SPager *pPager);
int tdbPagerCommit(SPager *pPager);
int tdbPagerGetPageSize(SPager *pPager);
int tdbPagerFetchPage(SPager *pPager, SPgno pgno, SPage **ppPage, int (*initPage)(SPage *, void *), void *arg);
int tdbPagerNewPage(SPager *pPager, SPgno *ppgno, SPage **ppPage, int (*initPage)(SPage *, void *), void *arg);
void tdbPagerReturnPage(SPager *pPager, SPage *pPage);
#ifdef __cplusplus
}

32
source/libs/tdb/src/inc/tdbUtil.h
View File

@ -39,6 +39,38 @@ int tdbGetFileSize(const char *fname, int pgSize, SPgno *pSize);
int tdbPRead(int fd, void *pData, int count, i64 offset);
#define TDB_REALLOC(PTR, SIZE) \
({ \
void *nPtr; \
if ((PTR) == NULL || ((int *)(PTR))[-1] < (SIZE)) { \
nPtr = realloc((PTR) ? (char *)(PTR) - sizeof(int) : NULL, (SIZE) + sizeof(int)); \
if (nPtr) { \
((int *)nPtr)[0] = (SIZE); \
nPtr = (char *)nPtr + sizeof(int); \
} \
} else { \
nPtr = (PTR); \
} \
nPtr; \
})
#define TDB_FREE(PTR) \
do { \
if (PTR) { \
free((char *)(PTR) - sizeof(int)); \
} \
} while (0)
static inline void *tdbOsMalloc(void *arg, size_t size) {
void *ptr;
ptr = malloc(size);
return ptr;
}
static inline void tdbOsFree(void *arg, void *ptr) { free(ptr); }
static inline int tdbPutVarInt(u8 *p, int v) {
int n = 0;

464
source/libs/tdb/src/page/tdbPage.c
View File

@ -18,13 +18,25 @@
extern SPageMethods pageMethods;
extern SPageMethods pageLargeMethods;
typedef struct __attribute__((__packed__)) {
u16 szCell;
u16 nxOffset;
} SFreeCell;
#define TDB_PAGE_HDR_SIZE(pPage) ((pPage)->pPageMethods->szPageHdr)
#define TDB_PAGE_FREE_CELL_SIZE(pPage) ((pPage)->pPageMethods->szFreeCell)
#define TDB_PAGE_NCELLS(pPage) (*(pPage)->pPageMethods->getCellNum)(pPage)
#define TDB_PAGE_CCELLS(pPage) (*(pPage)->pPageMethods->getCellBody)(pPage)
#define TDB_PAGE_FCELL(pPage) (*(pPage)->pPageMethods->getCellFree)(pPage)
#define TDB_PAGE_NFREE(pPage) (*(pPage)->pPageMethods->getFreeBytes)(pPage)
#define TDB_PAGE_CELL_OFFSET_AT(pPage, idx) (*(pPage)->pPageMethods->getCellOffset)(pPage, idx)
#define TDB_PAGE_NCELLS_SET(pPage, NCELLS) (*(pPage)->pPageMethods->setCellNum)(pPage, NCELLS)
#define TDB_PAGE_CCELLS_SET(pPage, CCELLS) (*(pPage)->pPageMethods->setCellBody)(pPage, CCELLS)
#define TDB_PAGE_FCELL_SET(pPage, FCELL) (*(pPage)->pPageMethods->setCellFree)(pPage, FCELL)
#define TDB_PAGE_NFREE_SET(pPage, NFREE) (*(pPage)->pPageMethods->setFreeBytes)(pPage, NFREE)
#define TDB_PAGE_CELL_OFFSET_AT_SET(pPage, idx, OFFSET) (*(pPage)->pPageMethods->setCellOffset)(pPage, idx, OFFSET)
#define TDB_PAGE_CELL_AT(pPage, idx) ((pPage)->pData + TDB_PAGE_CELL_OFFSET_AT(pPage, idx))
#define TDB_PAGE_MAX_FREE_BLOCK(pPage, szAmHdr) \
((pPage)->pageSize - (szAmHdr)-TDB_PAGE_HDR_SIZE(pPage) - sizeof(SPageFtr))
static int tdbPageAllocate(SPage *pPage, int size, SCell **ppCell);
static int tdbPageDefragment(SPage *pPage);
static int tdbPageFree(SPage *pPage, int idx, SCell *pCell, int szCell);
int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t), void *arg) {
SPage *pPage;
@ -35,25 +47,26 @@ int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t)
*ppPage = NULL;
size = pageSize + sizeof(*pPage);
if (xMalloc == NULL) {
xMalloc = tdbOsMalloc;
}
ptr = (u8 *)((*xMalloc)(arg, size));
if (pPage == NULL) {
if (ptr == NULL) {
return -1;
}
memset(ptr, 0, size);
pPage = (SPage *)(ptr + pageSize);
pPage->pData = ptr;
TDB_INIT_PAGE_LOCK(pPage);
pPage->pageSize = pageSize;
pPage->pData = ptr;
if (pageSize < 65536) {
pPage->pPageMethods = &pageMethods;
} else {
pPage->pPageMethods = &pageLargeMethods;
}
TDB_INIT_PAGE_LOCK(pPage);
/* TODO */
*ppPage = pPage;
return 0;
@ -62,157 +75,365 @@ int tdbPageCreate(int pageSize, SPage **ppPage, void *(*xMalloc)(void *, size_t)
int tdbPageDestroy(SPage *pPage, void (*xFree)(void *arg, void *ptr), void *arg) {
u8 *ptr;
if (!xFree) {
xFree = tdbOsFree;
}
ptr = pPage->pData;
(*xFree)(arg, ptr);
return 0;
}
int tdbPageInsertCell(SPage *pPage, int idx, SCell *pCell, int szCell) {
int ret;
SCell *pTarget;
u8 *pTmp;
int j;
void tdbPageZero(SPage *pPage, u8 szAmHdr, int (*xCellSize)(const SPage *, SCell *)) {
pPage->pPageHdr = pPage->pData + szAmHdr;
TDB_PAGE_NCELLS_SET(pPage, 0);
TDB_PAGE_CCELLS_SET(pPage, pPage->pageSize - sizeof(SPageFtr));
TDB_PAGE_FCELL_SET(pPage, 0);
TDB_PAGE_NFREE_SET(pPage, TDB_PAGE_MAX_FREE_BLOCK(pPage, szAmHdr));
pPage->pCellIdx = pPage->pPageHdr + TDB_PAGE_HDR_SIZE(pPage);
pPage->pFreeStart = pPage->pCellIdx;
pPage->pFreeEnd = pPage->pData + TDB_PAGE_CCELLS(pPage);
pPage->pPageFtr = (SPageFtr *)(pPage->pData + pPage->pageSize - sizeof(SPageFtr));
pPage->nOverflow = 0;
pPage->xCellSize = xCellSize;
if (pPage->nOverflow || szCell + TDB_PAGE_OFFSET_SIZE(pPage) > pPage->nFree) {
// TODO: need to figure out if pCell may be used by outside of this function
j = pPage->nOverflow++;
ASSERT((u8 *)pPage->pPageFtr == pPage->pFreeEnd);
}
pPage->apOvfl[j] = pCell;
pPage->aiOvfl[j] = idx;
} else {
ret = tdbPageAllocate(pPage, szCell, &pTarget);
if (ret < 0) {
return -1;
void tdbPageInit(SPage *pPage, u8 szAmHdr, int (*xCellSize)(const SPage *, SCell *)) {
pPage->pPageHdr = pPage->pData + szAmHdr;
pPage->pCellIdx = pPage->pPageHdr + TDB_PAGE_HDR_SIZE(pPage);
pPage->pFreeStart = pPage->pCellIdx + TDB_PAGE_OFFSET_SIZE(pPage) * TDB_PAGE_NCELLS(pPage);
pPage->pFreeEnd = pPage->pData + TDB_PAGE_CCELLS(pPage);
pPage->pPageFtr = (SPageFtr *)(pPage->pData + pPage->pageSize - sizeof(SPageFtr));
pPage->nOverflow = 0;
pPage->xCellSize = xCellSize;
ASSERT(pPage->pFreeEnd >= pPage->pFreeStart);
ASSERT(pPage->pFreeEnd - pPage->pFreeStart <= TDB_PAGE_NFREE(pPage));
}
int tdbPageInsertCell(SPage *pPage, int idx, SCell *pCell, int szCell, u8 asOvfl) {
int nFree;
int nCells;
int iOvfl;
int lidx; // local idx
SCell *pNewCell;
ASSERT(szCell <= TDB_PAGE_MAX_FREE_BLOCK(pPage, pPage->pPageHdr - pPage->pData));
nFree = TDB_PAGE_NFREE(pPage);
nCells = TDB_PAGE_NCELLS(pPage);
iOvfl = 0;
for (; iOvfl < pPage->nOverflow; iOvfl++) {
if (pPage->aiOvfl[iOvfl] >= idx) {
break;
}
}
lidx = idx - iOvfl;
if (asOvfl || nFree < szCell + TDB_PAGE_OFFSET_SIZE(pPage)) {
// TODO: make it extensible
// add the cell as an overflow cell
for (int i = pPage->nOverflow; i > iOvfl; i--) {
pPage->apOvfl[i] = pPage->apOvfl[i - 1];
pPage->aiOvfl[i] = pPage->aiOvfl[i - 1];
}
memcpy(pTarget, pCell, szCell);
pTmp = pPage->pCellIdx + idx * TDB_PAGE_OFFSET_SIZE(pPage);
memmove(pTmp + TDB_PAGE_OFFSET_SIZE(pPage), pTmp, pPage->pFreeStart - pTmp - TDB_PAGE_OFFSET_SIZE(pPage));
TDB_PAGE_CELL_OFFSET_AT_SET(pPage, idx, pTarget - pPage->pData);
TDB_PAGE_NCELLS_SET(pPage, TDB_PAGE_NCELLS(pPage) + 1);
// TODO: here has memory leak
pNewCell = (SCell *)malloc(szCell);
memcpy(pNewCell, pCell, szCell);
pPage->apOvfl[iOvfl] = pNewCell;
pPage->aiOvfl[iOvfl] = idx;
pPage->nOverflow++;
iOvfl++;
} else {
// page must has enough space to hold the cell locally
tdbPageAllocate(pPage, szCell, &pNewCell);
memcpy(pNewCell, pCell, szCell);
// no overflow cell exists in this page
u8 *src = pPage->pCellIdx + TDB_PAGE_OFFSET_SIZE(pPage) * lidx;
u8 *dest = src + TDB_PAGE_OFFSET_SIZE(pPage);
memmove(dest, src, pPage->pFreeStart - dest);
TDB_PAGE_CELL_OFFSET_AT_SET(pPage, lidx, pNewCell - pPage->pData);
TDB_PAGE_NCELLS_SET(pPage, nCells + 1);
ASSERT(pPage->pFreeStart == pPage->pCellIdx + TDB_PAGE_OFFSET_SIZE(pPage) * (nCells + 1));
}
for (; iOvfl < pPage->nOverflow; iOvfl++) {
pPage->aiOvfl[iOvfl]++;
}
return 0;
}
int tdbPageDropCell(SPage *pPage, int idx) {
// TODO
int lidx;
SCell *pCell;
int szCell;
int nCells;
int iOvfl;
nCells = TDB_PAGE_NCELLS(pPage);
ASSERT(idx >= 0 && idx < nCells + pPage->nOverflow);
iOvfl = 0;
for (; iOvfl < pPage->nOverflow; iOvfl++) {
if (pPage->aiOvfl[iOvfl] == idx) {
// remove the over flow cell
for (; (++iOvfl) < pPage->nOverflow;) {
pPage->aiOvfl[iOvfl - 1] = pPage->aiOvfl[iOvfl] - 1;
pPage->apOvfl[iOvfl - 1] = pPage->apOvfl[iOvfl];
}
pPage->nOverflow--;
return 0;
} else if (pPage->aiOvfl[iOvfl] > idx) {
break;
}
}
lidx = idx - iOvfl;
pCell = TDB_PAGE_CELL_AT(pPage, lidx);
szCell = (*pPage->xCellSize)(pPage, pCell);
tdbPageFree(pPage, lidx, pCell, szCell);
TDB_PAGE_NCELLS_SET(pPage, nCells - 1);
for (; iOvfl < pPage->nOverflow; iOvfl++) {
pPage->aiOvfl[iOvfl]--;
ASSERT(pPage->aiOvfl[iOvfl] > 0);
}
return 0;
}
static int tdbPageAllocate(SPage *pPage, int size, SCell **ppCell) {
SCell *pCell;
SFreeCell *pFreeCell;
u8 *pOffset;
int ret;
void tdbPageCopy(SPage *pFromPage, SPage *pToPage) {
int delta, nFree;
ASSERT(pPage->nFree > size + TDB_PAGE_OFFSET_SIZE(pPage));
pToPage->pFreeStart = pToPage->pPageHdr + (pFromPage->pFreeStart - pFromPage->pPageHdr);
pToPage->pFreeEnd = (u8 *)(pToPage->pPageFtr) - ((u8 *)pFromPage->pPageFtr - pFromPage->pFreeEnd);
ASSERT(pToPage->pFreeEnd >= pToPage->pFreeStart);
memcpy(pToPage->pPageHdr, pFromPage->pPageHdr, pFromPage->pFreeStart - pFromPage->pPageHdr);
memcpy(pToPage->pFreeEnd, pFromPage->pFreeEnd, (u8 *)pFromPage->pPageFtr - pFromPage->pFreeEnd);
ASSERT(TDB_PAGE_CCELLS(pToPage) == pToPage->pFreeEnd - pToPage->pData);
delta = (pToPage->pPageHdr - pToPage->pData) - (pFromPage->pPageHdr - pFromPage->pData);
if (delta != 0) {
nFree = TDB_PAGE_NFREE(pFromPage);
TDB_PAGE_NFREE_SET(pToPage, nFree - delta);
}
// Copy the overflow cells
for (int iOvfl = 0; iOvfl < pFromPage->nOverflow; iOvfl++) {
pToPage->aiOvfl[iOvfl] = pFromPage->aiOvfl[iOvfl];
pToPage->apOvfl[iOvfl] = pFromPage->apOvfl[iOvfl];
}
pToPage->nOverflow = pFromPage->nOverflow;
}
static int tdbPageAllocate(SPage *pPage, int szCell, SCell **ppCell) {
SCell *pFreeCell;
u8 *pOffset;
int nFree;
int ret;
int cellFree;
SCell *pCell = NULL;
pCell = NULL;
*ppCell = NULL;
nFree = TDB_PAGE_NFREE(pPage);
// 1. Try to allocate from the free space area
if (pPage->pFreeEnd - pPage->pFreeStart > size + TDB_PAGE_OFFSET_SIZE(pPage)) {
pPage->pFreeEnd -= size;
pPage->pFreeStart += TDB_PAGE_OFFSET_SIZE(pPage);
ASSERT(nFree >= szCell + TDB_PAGE_OFFSET_SIZE(pPage));
ASSERT(TDB_PAGE_CCELLS(pPage) == pPage->pFreeEnd - pPage->pData);
// 1. Try to allocate from the free space block area
if (pPage->pFreeEnd - pPage->pFreeStart >= szCell + TDB_PAGE_OFFSET_SIZE(pPage)) {
pPage->pFreeEnd -= szCell;
pCell = pPage->pFreeEnd;
TDB_PAGE_CCELLS_SET(pPage, pPage->pFreeEnd - pPage->pData);
goto _alloc_finish;
}
// 2. Try to allocate from the page free list
if ((pCell == NULL) && (pPage->pFreeEnd - pPage->pFreeStart >= TDB_PAGE_OFFSET_SIZE(pPage)) &&
TDB_PAGE_FCELL(pPage)) {
#if 0
int szCell;
int nxOffset;
pCell = pPage->pData + TDB_PAGE_FCELL(pPage);
pOffset = TDB_IS_LARGE_PAGE(pPage) ? ((SPageHdrL *)(pPage->pPageHdr))[0].fCell
: (u8 *)&(((SPageHdr *)(pPage->pPageHdr))[0].fCell);
szCell = TDB_PAGE_FREE_CELL_SIZE(pPage, pCell);
nxOffset = TDB_PAGE_FREE_CELL_NXOFFSET(pPage, pCell);
cellFree = TDB_PAGE_FCELL(pPage);
ASSERT(cellFree == 0 || cellFree > pPage->pFreeEnd - pPage->pData);
if (cellFree && pPage->pFreeEnd - pPage->pFreeStart >= TDB_PAGE_OFFSET_SIZE(pPage)) {
SCell *pPrevFreeCell = NULL;
int szPrevFreeCell;
int szFreeCell;
int nxFreeCell;
int newSize;
for (;;) {
// Find a cell
if (szCell >= size) {
if (szCell - size >= pPage->szFreeCell) {
SCell *pTmpCell = pCell + size;
if (cellFree == 0) break;
TDB_PAGE_FREE_CELL_SIZE_SET(pPage, pTmpCell, szCell - size);
TDB_PAGE_FREE_CELL_NXOFFSET_SET(pPage, pTmpCell, nxOffset);
// TODO: *pOffset = pTmpCell - pPage->pData;
pFreeCell = pPage->pData + cellFree;
pPage->pPageMethods->getFreeCellInfo(pFreeCell, &szFreeCell, &nxFreeCell);
if (szFreeCell >= szCell) {
pCell = pFreeCell;
newSize = szFreeCell - szCell;
pFreeCell += szCell;
if (newSize >= TDB_PAGE_FREE_CELL_SIZE(pPage)) {
pPage->pPageMethods->setFreeCellInfo(pFreeCell, newSize, nxFreeCell);
if (pPrevFreeCell) {
pPage->pPageMethods->setFreeCellInfo(pPrevFreeCell, szPrevFreeCell, pFreeCell - pPage->pData);
} else {
TDB_PAGE_FCELL_SET(pPage, pFreeCell - pPage->pData);
}
} else {
TDB_PAGE_NFREE_SET(pPage, TDB_PAGE_NFREE(pPage) + szCell - size);
// TODO: *pOffset = nxOffset;
if (pPrevFreeCell) {
pPage->pPageMethods->setFreeCellInfo(pPrevFreeCell, szPrevFreeCell, nxFreeCell);
} else {
TDB_PAGE_FCELL_SET(pPage, nxFreeCell);
}
}
break;
}
// Not find a cell yet
if (nxOffset > 0) {
pCell = pPage->pData + nxOffset;
pOffset = TDB_PAGE_FREE_CELL_NXOFFSET_PTR(pPage, pCell);
szCell = TDB_PAGE_FREE_CELL_SIZE(pPage, pCell);
nxOffset = TDB_PAGE_FREE_CELL_NXOFFSET(pPage, pCell);
continue;
goto _alloc_finish;
} else {
pCell = NULL;
break;
pPrevFreeCell = pFreeCell;
szPrevFreeCell = szFreeCell;
cellFree = nxFreeCell;
}
}
if (pCell) {
pPage->pFreeStart = pPage->pFreeStart + pPage->szOffset;
}
#endif
}
// 3. Try to dfragment and allocate again
if (pCell == NULL) {
ret = tdbPageDefragment(pPage);
if (ret < 0) {
return -1;
}
tdbPageDefragment(pPage);
ASSERT(pPage->pFreeEnd - pPage->pFreeStart == nFree);
ASSERT(nFree == TDB_PAGE_NFREE(pPage));
ASSERT(pPage->pFreeEnd - pPage->pData == TDB_PAGE_CCELLS(pPage));
ASSERT(pPage->pFreeEnd - pPage->pFreeStart > size + TDB_PAGE_OFFSET_SIZE(pPage));
ASSERT(pPage->nFree == pPage->pFreeEnd - pPage->pFreeStart);
pPage->pFreeEnd -= szCell;
pCell = pPage->pFreeEnd;
TDB_PAGE_CCELLS_SET(pPage, pPage->pFreeEnd - pPage->pData);
// Allocate from the free space area again
pPage->pFreeEnd -= size;
pPage->pFreeStart += TDB_PAGE_OFFSET_SIZE(pPage);
pCell = pPage->pFreeEnd;
}
ASSERT(pCell != NULL);
pPage->nFree = pPage->nFree - size - TDB_PAGE_OFFSET_SIZE(pPage);
_alloc_finish:
ASSERT(pCell);
pPage->pFreeStart += TDB_PAGE_OFFSET_SIZE(pPage);
TDB_PAGE_NFREE_SET(pPage, nFree - szCell - TDB_PAGE_OFFSET_SIZE(pPage));
*ppCell = pCell;
return 0;
}
static int tdbPageFree(SPage *pPage, int idx, SCell *pCell, int size) {
// TODO
static int tdbPageFree(SPage *pPage, int idx, SCell *pCell, int szCell) {
int nFree;
int cellFree;
u8 *dest;
u8 *src;
ASSERT(pCell >= pPage->pFreeEnd);
ASSERT(pCell + szCell <= (u8 *)(pPage->pPageFtr));
ASSERT(pCell == TDB_PAGE_CELL_AT(pPage, idx));
nFree = TDB_PAGE_NFREE(pPage);
if (pCell == pPage->pFreeEnd) {
pPage->pFreeEnd += szCell;
TDB_PAGE_CCELLS_SET(pPage, pPage->pFreeEnd - pPage->pData);
} else {
if (szCell >= TDB_PAGE_FREE_CELL_SIZE(pPage)) {
cellFree = TDB_PAGE_FCELL(pPage);
pPage->pPageMethods->setFreeCellInfo(pCell, szCell, cellFree);
TDB_PAGE_FCELL_SET(pPage, pCell - pPage->pData);
} else {
ASSERT(0);
}
}
dest = pPage->pCellIdx + TDB_PAGE_OFFSET_SIZE(pPage) * idx;
src = dest + TDB_PAGE_OFFSET_SIZE(pPage);
memmove(dest, src, pPage->pFreeStart - src);
pPage->pFreeStart -= TDB_PAGE_OFFSET_SIZE(pPage);
nFree = nFree + szCell + TDB_PAGE_OFFSET_SIZE(pPage);
TDB_PAGE_NFREE_SET(pPage, nFree);
return 0;
}
static int tdbPageDefragment(SPage *pPage) {
// TODO
ASSERT(0);
int nFree;
int nCells;
SCell *pCell;
SCell *pNextCell;
SCell *pTCell;
int szCell;
int idx;
int iCell;
ASSERT(pPage->pFreeEnd - pPage->pFreeStart < nFree);
nFree = TDB_PAGE_NFREE(pPage);
nCells = TDB_PAGE_NCELLS(pPage);
// Loop to compact the page content
// Here we use an O(n^2) algorithm to do the job since
// this is a low frequency job.
pNextCell = (u8 *)pPage->pPageFtr;
pCell = NULL;
for (iCell = 0;; iCell++) {
// compact over
if (iCell == nCells) {
pPage->pFreeEnd = pNextCell;
break;
}
for (int i = 0; i < nCells; i++) {
if (TDB_PAGE_CELL_OFFSET_AT(pPage, i) < pNextCell - pPage->pData) {
pTCell = TDB_PAGE_CELL_AT(pPage, i);
if (pCell == NULL || pCell < pTCell) {
pCell = pTCell;
idx = i;
}
} else {
continue;
}
}
ASSERT(pCell != NULL);
szCell = (*pPage->xCellSize)(pPage, pCell);
ASSERT(pCell + szCell <= pNextCell);
if (pCell + szCell < pNextCell) {
memmove(pNextCell - szCell, pCell, szCell);
}
pCell = NULL;
pNextCell = pNextCell - szCell;
TDB_PAGE_CELL_OFFSET_AT_SET(pPage, idx, pNextCell - pPage->pData);
}
ASSERT(pPage->pFreeEnd - pPage->pFreeStart == nFree);
TDB_PAGE_CCELLS_SET(pPage, pPage->pFreeEnd - pPage->pData);
TDB_PAGE_FCELL_SET(pPage, 0);
return 0;
}
/* ---------------------------------------------------------------------------------------------------------- */
typedef struct __attribute__((__packed__)) {
u16 flags;
u16 cellNum;
u16 cellBody;
u16 cellFree;
u16 nFree;
} SPageHdr;
// flags
static inline u16 getPageFlags(SPage *pPage) { return ((SPageHdr *)(pPage->pPageHdr))[0].flags; }
static inline void setPageFlags(SPage *pPage, u16 flags) { ((SPageHdr *)(pPage->pPageHdr))[0].flags = flags; }
typedef struct __attribute__((__packed__)) {
u16 szCell;
u16 nxOffset;
} SFreeCell;
// cellNum
static inline int getPageCellNum(SPage *pPage) { return ((SPageHdr *)(pPage->pPageHdr))[0].cellNum; }
@ -253,20 +474,33 @@ static inline void setPageCellOffset(SPage *pPage, int idx, int offset) {
((u16 *)pPage->pCellIdx)[idx] = (u16)offset;
}
// free cell info
static inline void getPageFreeCellInfo(SCell *pCell, int *szCell, int *nxOffset) {
SFreeCell *pFreeCell = (SFreeCell *)pCell;
*szCell = pFreeCell->szCell;
*nxOffset = pFreeCell->nxOffset;
}
static inline void setPageFreeCellInfo(SCell *pCell, int szCell, int nxOffset) {
SFreeCell *pFreeCell = (SFreeCell *)pCell;
pFreeCell->szCell = szCell;
pFreeCell->nxOffset = nxOffset;
}
SPageMethods pageMethods = {
2, // szOffset
sizeof(SPageHdr), // szPageHdr
sizeof(SFreeCell), // szFreeCell
getPageFlags, // getPageFlags
setPageFlags, // setFlagsp
getPageCellNum, // getCellNum
setPageCellNum, // setCellNum
getPageCellBody, // getCellBody
setPageCellBody, // setCellBody
getPageCellFree, // getCellFree
setPageCellFree, // setCellFree
getPageNFree, // getFreeBytes
setPageNFree, // setFreeBytes
getPageCellOffset, // getCellOffset
setPageCellOffset // setCellOffset
2, // szOffset
sizeof(SPageHdr), // szPageHdr
sizeof(SFreeCell), // szFreeCell
getPageCellNum, // getCellNum
setPageCellNum, // setCellNum
getPageCellBody, // getCellBody
setPageCellBody, // setCellBody
getPageCellFree, // getCellFree
setPageCellFree, // setCellFree
getPageNFree, // getFreeBytes
setPageNFree, // setFreeBytes
getPageCellOffset, // getCellOffset
setPageCellOffset, // setCellOffset
getPageFreeCellInfo, // getFreeCellInfo
setPageFreeCellInfo // setFreeCellInfo
};

56
source/libs/tdb/src/page/tdbPageL.c
View File

@ -16,11 +16,10 @@
#include "tdbInt.h"
typedef struct __attribute__((__packed__)) {
u16 flags;
u8 cellNum[3];
u8 cellBody[3];
u8 cellFree[3];
u8 nFree[3];
u8 cellNum[3];
u8 cellBody[3];
u8 cellFree[3];
u8 nFree[3];
} SPageHdrL;
typedef struct __attribute__((__packed__)) {
@ -28,10 +27,6 @@ typedef struct __attribute__((__packed__)) {
u8 nxOffset[3];
} SFreeCellL;
// flags
static inline u16 getPageFlags(SPage *pPage) { return ((SPageHdrL *)(pPage->pPageHdr))[0].flags; }
static inline void setPageFlags(SPage *pPage, u16 flags) { ((SPageHdrL *)(pPage->pPageHdr))[0].flags = flags; }
// cellNum
static inline int getPageCellNum(SPage *pPage) { return TDB_GET_U24(((SPageHdrL *)(pPage->pPageHdr))[0].cellNum); }
static inline void setPageCellNum(SPage *pPage, int cellNum) {
@ -66,20 +61,33 @@ static inline void setPageCellOffset(SPage *pPage, int idx, int offset) {
TDB_PUT_U24(pPage->pCellIdx + 3 * idx, offset);
}
// free cell info
static inline void getPageFreeCellInfo(SCell *pCell, int *szCell, int *nxOffset) {
SFreeCellL *pFreeCell = (SFreeCellL *)pCell;
*szCell = TDB_GET_U24(pFreeCell->szCell);
*nxOffset = TDB_GET_U24(pFreeCell->nxOffset);
}
static inline void setPageFreeCellInfo(SCell *pCell, int szCell, int nxOffset) {
SFreeCellL *pFreeCell = (SFreeCellL *)pCell;
TDB_PUT_U24(pFreeCell->szCell, szCell);
TDB_PUT_U24(pFreeCell->nxOffset, nxOffset);
}
SPageMethods pageLargeMethods = {
3, // szOffset
sizeof(SPageHdrL), // szPageHdr
sizeof(SFreeCellL), // szFreeCell
getPageFlags, // getPageFlags
setPageFlags, // setFlagsp
getPageCellNum, // getCellNum
setPageCellNum, // setCellNum
getPageCellBody, // getCellBody
setPageCellBody, // setCellBody
getPageCellFree, // getCellFree
setPageCellFree, // setCellFree
getPageNFree, // getFreeBytes
setPageNFree, // setFreeBytes
getPageCellOffset, // getCellOffset
setPageCellOffset // setCellOffset
3, // szOffset
sizeof(SPageHdrL), // szPageHdr
sizeof(SFreeCellL), // szFreeCell
getPageCellNum, // getCellNum
setPageCellNum, // setCellNum
getPageCellBody, // getCellBody
setPageCellBody, // setCellBody
getPageCellFree, // getCellFree
setPageCellFree, // setCellFree
getPageNFree, // getFreeBytes
setPageNFree, // setFreeBytes
getPageCellOffset, // getCellOffset
setPageCellOffset, // setCellOffset
getPageFreeCellInfo, // getFreeCellInfo
setPageFreeCellInfo // setFreeCellInfo
};

182
source/libs/tdb/test/tdbTest.cpp
View File

@ -2,28 +2,190 @@
#include "tdbInt.h"
#include <string>
typedef struct SPoolMem {
int64_t size;
struct SPoolMem *prev;
struct SPoolMem *next;
} SPoolMem;
static SPoolMem *openPool() {
SPoolMem *pPool = (SPoolMem *)malloc(sizeof(*pPool));
pPool->prev = pPool->next = pPool;
pPool->size = 0;
return pPool;
}
static void closePool(SPoolMem *pPool) {
SPoolMem *pMem;
do {
pMem = pPool->next;
if (pMem == pPool) break;
pMem->next->prev = pMem->prev;
pMem->prev->next = pMem->next;
pPool->size -= pMem->size;
free(pMem);
} while (1);
assert(pPool->size == 0);
free(pPool);
}
static void *poolMalloc(void *arg, int size) {
void *ptr = NULL;
SPoolMem *pPool = (SPoolMem *)arg;
SPoolMem *pMem;
pMem = (SPoolMem *)malloc(sizeof(*pMem) + size);
if (pMem == NULL) {
assert(0);
}
pMem->size = sizeof(*pMem) + size;
pMem->next = pPool->next;
pMem->prev = pPool;
pPool->next->prev = pMem;
pPool->next = pMem;
pPool->size += pMem->size;
ptr = (void *)(&pMem[1]);
return ptr;
}
static void poolFree(void *arg, void *ptr) {
SPoolMem *pPool = (SPoolMem *)arg;
SPoolMem *pMem;
pMem = &(((SPoolMem *)ptr)[-1]);
pMem->next->prev = pMem->prev;
pMem->prev->next = pMem->next;
pPool->size -= pMem->size;
free(pMem);
}
static int tKeyCmpr(const void *pKey1, int kLen1, const void *pKey2, int kLen2) {
int k1, k2;
std::string s1((char *)pKey1 + 3, kLen1 - 3);
std::string s2((char *)pKey2 + 3, kLen2 - 3);
k1 = stoi(s1);
k2 = stoi(s2);
if (k1 < k2) {
return -1;
} else if (k1 > k2) {
return 1;
} else {
return 0;
}
}
static int tDefaultKeyCmpr(const void *pKey1, int keyLen1, const void *pKey2, int keyLen2) {
int mlen;
int cret;
ASSERT(keyLen1 > 0 && keyLen2 > 0 && pKey1 != NULL && pKey2 != NULL);
mlen = keyLen1 < keyLen2 ? keyLen1 : keyLen2;
cret = memcmp(pKey1, pKey2, mlen);
if (cret == 0) {
if (keyLen1 < keyLen2) {
cret = -1;
} else if (keyLen1 > keyLen2) {
cret = 1;
} else {
cret = 0;
}
}
return cret;
}
TEST(tdb_test, simple_test) {
int ret;
STEnv *pEnv;
STDb *pDb;
int ret;
STEnv *pEnv;
STDB *pDb;
FKeyComparator compFunc;
int nData = 10000000;
// Open Env
ret = tdbEnvOpen("tdb", 1024, 20, &pEnv);
ret = tdbEnvOpen("tdb", 4096, 256000, &pEnv);
GTEST_ASSERT_EQ(ret, 0);
// Create a database
ret = tdbDbOpen("db.db", TDB_VARIANT_LEN, TDB_VARIANT_LEN, NULL, pEnv, &pDb);
compFunc = tKeyCmpr;
ret = tdbDbOpen("db.db", TDB_VARIANT_LEN, TDB_VARIANT_LEN, compFunc, pEnv, &pDb);
GTEST_ASSERT_EQ(ret, 0);
{ // Insert some data
{
char key[64];
char val[64];
for (int i = 1; i <= 1000; i++) {
sprintf(key, "key%d", i);
sprintf(val, "value%d", i);
ret = tdbDbInsert(pDb, key, strlen(key), val, strlen(val));
{ // Insert some data
for (int i = 1; i <= nData; i++) {
sprintf(key, "key%d", i);
sprintf(val, "value%d", i);
ret = tdbDbInsert(pDb, key, strlen(key), val, strlen(val));
GTEST_ASSERT_EQ(ret, 0);
}
}
{ // Query the data
void *pVal = NULL;
int vLen;
for (int i = 1; i <= nData; i++) {
sprintf(key, "key%d", i);
sprintf(val, "value%d", i);
ret = tdbDbGet(pDb, key, strlen(key), &pVal, &vLen);
GTEST_ASSERT_EQ(ret, 0);
GTEST_ASSERT_EQ(vLen, strlen(val));
GTEST_ASSERT_EQ(memcmp(val, pVal, vLen), 0);
}
TDB_FREE(pVal);
}
{ // Iterate to query the DB data
STDBC *pDBC;
void *pKey = NULL;
void *pVal = NULL;
int vLen, kLen;
int count = 0;
ret = tdbDbcOpen(pDb, &pDBC);
GTEST_ASSERT_EQ(ret, 0);
for (;;) {
ret = tdbDbNext(pDBC, &pKey, &kLen, &pVal, &vLen);
if (ret < 0) break;
// std::cout.write((char *)pKey, kLen) /* << " " << kLen */ << " ";
// std::cout.write((char *)pVal, vLen) /* << " " << vLen */;
// std::cout << std::endl;
count++;
}
GTEST_ASSERT_EQ(count, nData);
tdbDbcClose(pDBC);
TDB_FREE(pKey);
TDB_FREE(pVal);
}
}