more progress

source/server/vnode/meta/inc/metaInt.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_META_INT_H_
-#define _TD_META_INT_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct {
-  tkv_db_t db;
-} SMeta;
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_META_INT_H_*/
\ No newline at end of file

source/server/vnode/meta/inc/metaUid.h

@@ -22,10 +22,22 @@
 extern "C" {
 #endif
 
-typedef uint64_t tb_uid_t;
-tb_uid_t         metaGenerateUid();
+/* ------------------------ APIS EXPOSED ------------------------ */
+typedef uint64_t                  tb_uid_t;
+typedef struct STableUidGenerator STableUidGenerator;
 
+// tb_uid_t
 #define IVLD_TB_UID 0
+tb_uid_t generateUid(STableUidGenerator *);
+
+// STableUidGenerator
+void tableUidGeneratorInit(STableUidGenerator *, tb_uid_t suid);
+#define tableUidGeneratorClear(ug)
+
+/* ------------------------ FOR TEST AND COMPILE ONLY ------------------------ */
+struct STableUidGenerator {
+  tb_uid_t nextUid;
+};
 
 #ifdef __cplusplus
 }

source/server/vnode/meta/src/meta.c

@@ -13,8 +13,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "tkv.h"
 #include "thash.h"
+#include "tkv.h"
 #include "tlist.h"
 #include "tlockfree.h"
 #include "ttypes.h"
@@ -43,13 +43,14 @@ typedef struct STableObj {
 struct SMeta {
   pthread_rwlock_t rwLock;
 
-  SHashObj *pTableObjHash;  // uid --> STableObj
-  SList *   stbList;        // super table list
-  STkvDb *  tbnameDb;       // tbname --> uid
-  STkvDb *  tagDb;          // uid --> tag
-  STkvDb *  schemaDb;
-  STkvDb *  tagIdx;
-  size_t    totalUsed;
+  STableUidGenerator uidGenerator;
+  SHashObj *         pTableObjHash;  // uid --> STableObj
+  SList *            stbList;        // super table list
+  STkvDb *           tbnameDb;       // tbname --> uid
+  STkvDb *           tagDb;          // uid --> tag
+  STkvDb *           schemaDb;
+  STkvDb *           tagIdx;
+  size_t             totalUsed;
 };
 
 static STable *   metaTableNew(tb_uid_t uid, const char *name, int32_t sver);
@@ -68,6 +69,7 @@ SMeta *metaOpen(SMetaOpts *options) {
 
   pthread_rwlock_init(&(pMeta->rwLock), NULL);
 
+  tableUidGeneratorInit(&(pMeta->uidGenerator), IVLD_TB_UID);
   pMeta->pTableObjHash = taosHashInit(1024, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_NO_LOCK);
 
   pMeta->stbList = tdListNew(sizeof(STableObj *));
@@ -109,9 +111,9 @@ void metaClose(SMeta *pMeta) {
 }
 
 int metaCreateTable(SMeta *pMeta, STableOpts *pTableOpts) {
-  size_t        vallen;
-  STkvReadOpts *ropt;
-  STableObj *   pTableObj = NULL;
+  size_t         vallen;
+  STkvReadOpts * ropt;
+  STableObj *    pTableObj = NULL;
   STkvWriteOpts *wopt;
 
   // Check if table already exists
@@ -133,7 +135,8 @@ int metaCreateTable(SMeta *pMeta, STableOpts *pTableOpts) {
   }
 
   // Create table object
-  pTableObj->pTable = metaTableNew(metaGenerateUid(), pTableOpts->name, schemaVersion(pTableOpts->pSchema));
+  pTableObj->pTable =
+      metaTableNew(generateUid(&(pMeta->uidGenerator)), pTableOpts->name, schemaVersion(pTableOpts->pSchema));
   if (pTableObj->pTable == NULL) {
     // TODO
   }
@@ -147,7 +150,7 @@ int metaCreateTable(SMeta *pMeta, STableOpts *pTableOpts) {
 
   // Add to tbname db
   tkvPut(pMeta->tbnameDb, wopt, pTableOpts->name, strlen(pTableOpts->name), (char *)&pTableObj->pTable->uid,
-              sizeof(tb_uid_t));
+         sizeof(tb_uid_t));
 
   // Add to schema db
   char  id[12];

source/server/vnode/meta/src/metaUid.c

@@ -15,9 +15,12 @@
 
 #include "metaUid.h"
 
-static tb_uid_t nuid = IVLD_TB_UID;
+tb_uid_t generateUid(STableUidGenerator *pGen) {
+  // Generate a new table UID
+  return ++(pGen->nextUid);
+}
 
-tb_uid_t metaGenerateUid() {
-  // TODO: need a more complex UID generator
-  return ++nuid;
+void tableUidGeneratorInit(STableUidGenerator *pGen, tb_uid_t suid) {
+  // Init a generator
+  pGen->nextUid = suid;
 }
\ No newline at end of file