66 lines
1.8 KiB
C
66 lines
1.8 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_KVSTORE_H_
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#define _TD_KVSTORE_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#define KVSTORE_FILE_VERSION ((uint32_t)0)
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typedef int (*iterFunc)(void *, void *cont, int contLen);
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typedef void (*afterFunc)(void *);
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typedef struct {
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int64_t size; // including 512 bytes of header size
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int64_t tombSize;
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int64_t nRecords;
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int64_t nDels;
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uint32_t magic;
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} SStoreInfo;
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typedef struct {
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char * fname;
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int fd;
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char * fsnap;
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int sfd;
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char * fnew;
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int nfd;
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SHashObj * map;
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iterFunc iFunc;
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afterFunc aFunc;
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void * appH;
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SStoreInfo info;
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} SKVStore;
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#define KVSTORE_MAGIC(s) (s)->info.magic
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int tdCreateKVStore(char *fname);
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int tdDestroyKVStore(char *fname);
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SKVStore *tdOpenKVStore(char *fname, iterFunc iFunc, afterFunc aFunc, void *appH);
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void tdCloseKVStore(SKVStore *pStore);
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int tdKVStoreStartCommit(SKVStore *pStore);
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int tdUpdateKVStoreRecord(SKVStore *pStore, uint64_t uid, void *cont, int contLen);
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int tdDropKVStoreRecord(SKVStore *pStore, uint64_t uid);
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int tdKVStoreEndCommit(SKVStore *pStore);
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#ifdef __cplusplus
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}
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#endif
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#endif |