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103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
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* PROGRAM: JRD Access method
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* MODULE: tpc_proto.h
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* DESCRIPTION: Prototype Header file for tpc.cpp
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#ifndef JRD_TPC_PROTO_H
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#define JRD_TPC_PROTO_H
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#include "../common/classes/array.h"
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#include "../common/classes/SyncObject.h"
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namespace Ods {
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struct tx_inv_page;
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};
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namespace Jrd {
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class Database;
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class thread_db;
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class TipCache
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{
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public:
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TipCache(Database* dbb);
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~TipCache();
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int cacheState(thread_db*, SLONG number);
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void initializeTpc(thread_db*, SLONG number);
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void setState(thread_db*, SLONG number, SSHORT state);
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int snapshotState(thread_db*, SLONG number);
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void updateCache(thread_db*, const Ods::tx_inv_page* tip_page, SLONG sequence);
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private:
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class TxPage : public pool_alloc_rpt<SCHAR, type_tpc>
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{
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public:
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SLONG tpc_base; // id of first transaction in this block
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UCHAR tpc_transactions[1]; // two bits per transaction
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static const SLONG generate(const void*, const TxPage* item)
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{
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return item->tpc_base;
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}
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};
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TxPage* allocTxPage(thread_db* tdbb, SLONG base);
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SLONG cacheTransactions(thread_db* tdbb, SLONG oldest);
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int extendCache(thread_db* tdbb, SLONG number);
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void clearCache();
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Database* m_dbb;
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Firebird::SyncObject m_sync;
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Firebird::SortedArray<TxPage*, Firebird::EmptyStorage<TxPage*>, SLONG, TxPage> m_cache;
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};
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inline int TPC_cache_state(thread_db* tdbb, SLONG number)
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{
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return tdbb->getDatabase()->dbb_tip_cache->cacheState(tdbb, number);
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}
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inline void TPC_initialize_tpc(thread_db* tdbb, SLONG number)
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{
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tdbb->getDatabase()->dbb_tip_cache->initializeTpc(tdbb, number);
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}
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inline void TPC_set_state(thread_db* tdbb, SLONG number, SSHORT state)
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{
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tdbb->getDatabase()->dbb_tip_cache->setState(tdbb, number, state);
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}
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inline int TPC_snapshot_state(thread_db* tdbb, SLONG number)
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{
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return tdbb->getDatabase()->dbb_tip_cache->snapshotState(tdbb, number);
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}
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inline void TPC_update_cache(thread_db* tdbb, const Ods::tx_inv_page* tip_page, SLONG sequence)
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{
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tdbb->getDatabase()->dbb_tip_cache->updateCache(tdbb, tip_page, sequence);
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}
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} // namespace Jrd
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#endif // JRD_TPC_PROTO_H
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