tdbPFile.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 _TD_PAGE_FILE_H_
#define _TD_PAGE_FILE_H_

#ifdef __cplusplus
extern "C" {
#endif

typedef struct SPFile SPFile;

// typedef struct __attribute__((__packed__)) {
//   char    hdrInfo[16];  // info string
//   pgsz_t  szPage;       // page size of current file
//   int32_t cno;          // commit number counter
//   SPgno  freePgno;     // freelist page number
//   uint8_t resv[100];    // reserved space
// } SPgFileHdr;

// #define TDB_PG_FILE_HDR_SIZE 128

// TDB_STATIC_ASSERT(sizeof(SPgFileHdr) == TDB_PG_FILE_HDR_SIZE, "Page file header size if not 128");

// struct SPgFile {
//   TENV *          pEnv;                     // env containing this page file
//   char *          fname;                    // backend file name
//   uint8_t         fileid[TDB_FILE_ID_LEN];  // file id
//   SPgno          lsize;                    // page file logical size (for count)
//   SPgno          fsize;                    // real file size on disk (for rollback)
//   int             fd;
//   SPgFileListNode envHash;
//   SPgFileListNode envPgfList;
// };

// int pgFileOpen(SPgFile **ppPgFile, const char *fname, TENV *pEnv);
// int pgFileClose(SPgFile *pPgFile);

// SPage *pgFileFetch(SPgFile *pPgFile, SPgno pgno);
// int    pgFileRelease(SPage *pPage);

// int pgFileWrite(SPage *pPage);
// int pgFileAllocatePage(SPgFile *pPgFile, SPgno *pPgno);

#ifdef __cplusplus
}
#endif

#endif /*_TD_PAGE_FILE_H_*/