114 lines
3.2 KiB
C
114 lines
3.2 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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#ifndef _TQ_META_STORE_H_
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#define _TQ_META_STORE_H_
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#include "os.h"
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#include "tq.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TQ_BUCKET_SIZE 0xFF
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#define TQ_PAGE_SIZE 4096
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//key + offset + size
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#define TQ_IDX_ENTRY_SIZE 24
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inline static int TqMaxEntryOnePage() { //170
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return TQ_PAGE_SIZE / TQ_IDX_ENTRY_SIZE;
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}
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inline static int TqEmptyTail() { //16
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return TQ_PAGE_SIZE - TqMaxEntryOnePage();
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}
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#define TQ_ACTION_CONST 0
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#define TQ_ACTION_INUSE 1
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#define TQ_ACTION_INUSE_CONT 2
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#define TQ_ACTION_INTXN 3
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#define TQ_SVER 0
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static const int8_t TQ_CONST_DELETE = TQ_ACTION_CONST;
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#define TQ_DELETE_TOKEN (void*)&TQ_CONST_DELETE
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typedef struct TqSerializedHead {
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int16_t ver;
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int16_t action;
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int32_t checksum;
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int64_t ssize;
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char content[];
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} TqSerializedHead;
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typedef struct TqMetaHandle {
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int64_t key;
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int64_t offset;
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int64_t serializedSize;
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void* valueInUse;
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void* valueInTxn;
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} TqMetaHandle;
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typedef struct TqMetaList {
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TqMetaHandle handle;
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struct TqMetaList* next;
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//struct TqMetaList* inTxnPrev;
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//struct TqMetaList* inTxnNext;
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struct TqMetaList* unpersistPrev;
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struct TqMetaList* unpersistNext;
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} TqMetaList;
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typedef struct TqMetaStore {
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TqMetaList* bucket[TQ_BUCKET_SIZE];
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//a table head
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TqMetaList* unpersistHead;
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int fileFd; //TODO:temporaral use, to be replaced by unified tfile
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int idxFd; //TODO:temporaral use, to be replaced by unified tfile
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char* dirPath;
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int (*serializer)(const void* pObj, TqSerializedHead** ppHead);
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const void* (*deserializer)(const TqSerializedHead* pHead, void** ppObj);
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void (*deleter)(void*);
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} TqMetaStore;
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TqMetaStore* tqStoreOpen(const char* path,
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int serializer(const void* pObj, TqSerializedHead** ppHead),
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const void* deserializer(const TqSerializedHead* pHead, void** ppObj),
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void deleter(void* pObj));
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int32_t tqStoreClose(TqMetaStore*);
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//int32_t tqStoreDelete(TqMetaStore*);
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//int32_t TqStoreCommitAll(TqMetaStore*);
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int32_t tqStorePersist(TqMetaStore*);
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void* tqHandleGet(TqMetaStore*, int64_t key);
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int32_t tqHandleMovePut(TqMetaStore*, int64_t key, void* value);
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int32_t tqHandleCopyPut(TqMetaStore*, int64_t key, void* value, size_t vsize);
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//do commit
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int32_t tqHandleCommit(TqMetaStore*, int64_t key);
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//delete uncommitted
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int32_t tqHandleAbort(TqMetaStore*, int64_t key);
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//delete committed kv pair
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//notice that a delete action still needs to be committed
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int32_t tqHandleDel(TqMetaStore*, int64_t key);
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//delete both committed and uncommitted
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int32_t tqHandleClear(TqMetaStore*, int64_t key);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ifndef _TQ_META_STORE_H_ */
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