61 lines
1.7 KiB
C
61 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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#define TAOS_WAL_NOLOG 0
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#define TAOS_WAL_WRITE 1
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#define TAOS_WAL_FSYNC 2
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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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int8_t walLevel; // wal level
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int32_t fsyncPeriod; // millisecond
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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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twalh walOpen(const char *path, const SWalCfg *pCfg);
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int walAlter(twalh pWal, const SWalCfg *pCfg);
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void walClose(twalh);
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int walRenew(twalh);
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int walWrite(twalh, SWalHead *);
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void walFsync(twalh);
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int walRestore(twalh, void *pVnode, FWalWrite writeFp);
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int walGetWalFile(twalh, char *name, uint32_t *index);
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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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