/*
 * 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 int (*iterFunc)(void *, void *cont, int contLen);
typedef void (*afterFunc)(void *);

typedef struct {
  int       fd;        // File descriptor
  int       nDel;      // number of deletions
  int       tombSize;  // deleted size
  int64_t   size;      // Total file size
  void *    map;       // Map from uid ==> position
  iterFunc  iFunc;
  afterFunc aFunc;
  void *    appH;
} SMetaFile;

SMetaFile *tsdbInitMetaFile(char *rootDir, int32_t maxTables, iterFunc iFunc, afterFunc aFunc, void *appH);
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_