89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_TDB_H_
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#define _TD_TDB_H_
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#include "os.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef int (*tdb_cmpr_fn_t)(const void *pKey1, int kLen1, const void *pKey2, int kLen2);
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// exposed types
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typedef struct STEnv TENV;
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typedef struct STDB TDB;
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typedef struct STDBC TDBC;
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typedef struct STxn TXN;
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// TENV
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int tdbEnvOpen(const char *rootDir, int szPage, int pages, TENV **ppEnv);
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int tdbEnvClose(TENV *pEnv);
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int tdbBegin(TENV *pEnv, TXN *pTxn);
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int tdbCommit(TENV *pEnv, TXN *pTxn);
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// TDB
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int tdbDbOpen(const char *fname, int keyLen, int valLen, tdb_cmpr_fn_t keyCmprFn, TENV *pEnv, TDB **ppDb);
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int tdbDbClose(TDB *pDb);
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int tdbDbDrop(TDB *pDb);
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int tdbDbInsert(TDB *pDb, const void *pKey, int keyLen, const void *pVal, int valLen, TXN *pTxn);
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int tdbDbDelete(TDB *pDb, const void *pKey, int kLen, TXN *pTxn);
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int tdbDbUpsert(TDB *pDb, const void *pKey, int kLen, const void *pVal, int vLen, TXN *pTxn);
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int tdbDbGet(TDB *pDb, const void *pKey, int kLen, void **ppVal, int *vLen);
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int tdbDbPGet(TDB *pDb, const void *pKey, int kLen, void **ppKey, int *pkLen, void **ppVal, int *vLen);
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// TDBC
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int tdbDbcOpen(TDB *pDb, TDBC **ppDbc, TXN *pTxn);
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int tdbDbcClose(TDBC *pDbc);
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int tdbDbcIsValid(TDBC *pDbc);
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int tdbDbcMoveTo(TDBC *pDbc, const void *pKey, int kLen, int *c);
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int tdbDbcMoveToFirst(TDBC *pDbc);
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int tdbDbcMoveToLast(TDBC *pDbc);
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int tdbDbcMoveToNext(TDBC *pDbc);
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int tdbDbcMoveToPrev(TDBC *pDbc);
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int tdbDbcGet(TDBC *pDbc, const void **ppKey, int *pkLen, const void **ppVal, int *pvLen);
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int tdbDbcDelete(TDBC *pDbc);
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int tdbDbcNext(TDBC *pDbc, void **ppKey, int *kLen, void **ppVal, int *vLen);
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int tdbDbcUpsert(TDBC *pDbc, const void *pKey, int nKey, const void *pData, int nData, int insert);
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// TXN
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#define TDB_TXN_WRITE 0x1
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#define TDB_TXN_READ_UNCOMMITTED 0x2
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int tdbTxnOpen(TXN *pTxn, int64_t txnid, void *(*xMalloc)(void *, size_t), void (*xFree)(void *, void *), void *xArg,
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int flags);
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int tdbTxnClose(TXN *pTxn);
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// other
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void tdbFree(void *);
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struct STxn {
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int flags;
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int64_t txnId;
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void *(*xMalloc)(void *, size_t);
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void (*xFree)(void *, void *);
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void *xArg;
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};
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// error code
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enum { TDB_CODE_SUCCESS = 0, TDB_CODE_MAX };
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#ifdef __cplusplus
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}
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#endif
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#endif /*_TD_TDB_H_*/ |