67 lines
1.7 KiB
C
67 lines
1.7 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_WAL_H_
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#define _TD_WAL_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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TAOS_WAL_NOLOG = 0,
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TAOS_WAL_WRITE = 1,
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TAOS_WAL_FSYNC = 2
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} EWalType;
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typedef struct {
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int8_t msgType;
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int8_t reserved[3];
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int32_t len;
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uint64_t version;
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uint32_t signature;
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uint32_t cksum;
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char cont[];
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} SWalHead;
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typedef struct {
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int32_t vgId;
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int32_t fsyncPeriod; // millisecond
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int8_t walLevel; // wal level
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int8_t wals; // number of WAL files;
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int8_t keep; // keep the wal file when closed
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} SWalCfg;
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typedef void* twalh; // WAL HANDLE
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typedef int (*FWalWrite)(void *ahandle, void *pHead, int type);
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int32_t walInit();
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void walCleanUp();
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twalh walOpen(char *path, SWalCfg *pCfg);
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int32_t walAlter(twalh pWal, SWalCfg *pCfg);
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void walClose(twalh);
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int32_t walRenew(twalh);
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int32_t walWrite(twalh, SWalHead *);
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void walFsync(twalh);
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int32_t walRestore(twalh, void *pVnode, FWalWrite writeFp);
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int32_t walGetWalFile(twalh, char *fileName, int64_t *fileId);
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int64_t walGetVersion(twalh);
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#ifdef __cplusplus
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}
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#endif
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#endif // _TD_WAL_H_
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