tsdbMetaFile.h

/*
 * 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 _TSDB_META_FILE_
#define _TSDB_META_FILE_

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define TSDB_META_FILE_NAME "META"
#define TSDB_META_HASH_FRACTION 1.1

typedef struct {
  int     fd;       // File descriptor
  int     nDel;     // number of deletions
  int     nRecord;  // Number of records
  int64_t size;     // Total file size
  void *  map;      // Map from uid ==> position
} SMetaFile;

SMetaFile *tsdbInitMetaFile(char *rootDir, int32_t maxTables);
int32_t    tsdbInsertMetaRecord(SMetaFile *mfh, int64_t uid, void *cont, int32_t contLen);
int32_t    tsdbDeleteMetaRecord(SMetaFile *mfh, int64_t uid);
int32_t    tsdbUpdateMetaRecord(SMetaFile *mfh, int64_t uid, void *cont, int32_t contLen);
void       tsdbCloseMetaFile(SMetaFile *mfh);

#ifdef __cplusplus
}
#endif

#endif  // _TSDB_META_FILE_