131 lines
2.8 KiB
C
131 lines
2.8 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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#include "tdbInt.h"
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struct STDbEnv {
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char * rootDir; // root directory of the environment
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pgsz_t pgSize; // page size
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cachesz_t cacheSize; // total cache size
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STDbList dbList; // TDB List
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SPgFileList pgfList; // SPgFile List
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SPgCache * pPgCache; // page cache
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struct {
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} pgfht; // page file hash table;
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SJournal *pJournal;
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};
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static int tdbEnvDestroy(TENV *pEnv);
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int tdbEnvCreate(TENV **ppEnv, const char *rootDir) {
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TENV * pEnv;
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size_t slen;
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ASSERT(rootDir != NULL);
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*ppEnv = NULL;
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slen = strlen(rootDir);
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pEnv = (TENV *)calloc(1, sizeof(*pEnv) + slen + 1);
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if (pEnv == NULL) {
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return -1;
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}
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pEnv->rootDir = (char *)(&pEnv[1]);
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pEnv->pgSize = TDB_DEFAULT_PGSIZE;
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pEnv->cacheSize = TDB_DEFAULT_CACHE_SIZE;
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memcpy(pEnv->rootDir, rootDir, slen);
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pEnv->rootDir[slen] = '\0';
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TD_DLIST_INIT(&(pEnv->dbList));
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TD_DLIST_INIT(&(pEnv->pgfList));
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/* TODO */
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*ppEnv = pEnv;
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return 0;
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}
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int tdbEnvOpen(TENV *pEnv) {
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SPgCache *pPgCache;
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int ret;
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ASSERT(pEnv != NULL);
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/* TODO: here we do not need to create the root directory, more
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* work should be done here
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*/
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mkdir(pEnv->rootDir, 0755);
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ret = pgCacheOpen(&pPgCache, pEnv);
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if (ret != 0) {
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goto _err;
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}
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pEnv->pPgCache = pPgCache;
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return 0;
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_err:
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return -1;
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}
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int tdbEnvClose(TENV *pEnv) {
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if (pEnv == NULL) return 0;
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pgCacheClose(pEnv->pPgCache);
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tdbEnvDestroy(pEnv);
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return 0;
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}
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int tdbEnvSetCache(TENV *pEnv, pgsz_t pgSize, cachesz_t cacheSize) {
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if (!TDB_IS_PGSIZE_VLD(pgSize) || cacheSize / pgSize < 10) {
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return -1;
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}
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/* TODO */
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pEnv->pgSize = pgSize;
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pEnv->cacheSize = cacheSize;
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return 0;
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}
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pgsz_t tdbEnvGetPageSize(TENV *pEnv) { return pEnv->pgSize; }
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cachesz_t tdbEnvGetCacheSize(TENV *pEnv) { return pEnv->cacheSize; }
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SPgFile *tdbEnvGetPageFile(TENV *pEnv, const uint8_t fileid[]) {
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// TODO
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return NULL;
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}
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SPgCache *tdbEnvGetPgCache(TENV *pEnv) { return pEnv->pPgCache; }
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static int tdbEnvDestroy(TENV *pEnv) {
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// TODO
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return 0;
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}
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int tdbEnvBeginTxn(TENV *pEnv) {
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// TODO
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return 0;
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}
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int tdbEnvCommit(TENV *pEnv) {
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// TODO
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return 0;
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}
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const char *tdbEnvGetRootDir(TENV *pEnv) { return pEnv->rootDir; }
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