mirror of
https://github.com/FirebirdSQL/firebird.git
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144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
/*
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* PROGRAM: JRD access method
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* MODULE: Database.cpp
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* DESCRIPTION: Common descriptions
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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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* Sean Leyne
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* Claudio Valderrama C.
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*/
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#include "firebird.h"
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// Definition of block types for data allocation in JRD
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#include "../include/fb_blk.h"
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#include "../jrd/ibase.h"
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#include "../jrd/common.h"
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#include "../jrd/ods.h"
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#include "../jrd/lck.h"
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#include "../jrd/Database.h"
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#include "../jrd/tra.h"
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#include "../jrd/lck_proto.h"
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#include "../jrd/os/pio_proto.h"
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// Thread data block
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#include "../jrd/ThreadData.h"
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// recursive mutexes
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#include "../common/thd.h"
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namespace Jrd
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{
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bool Database::onRawDevice() const
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{
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#ifdef SUPPORT_RAW_DEVICES
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return PIO_on_raw_device(dbb_filename);
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#else
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return false;
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#endif
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}
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Database::~Database()
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{
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delete dbb_sys_trans;
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destroyIntlObjects();
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fb_assert(dbb_pools[0] == dbb_permanent);
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for (size_t i = 1; i < dbb_pools.getCount(); ++i)
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{
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MemoryPool::deletePool(dbb_pools[i]);
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}
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dbb_flags |= DBB_destroying;
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Checkout dcoHolder(this);
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dbb_lock_mgr->release();
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}
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void Database::deletePool(MemoryPool* pool)
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{
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if (pool)
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{
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size_t pos;
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if (dbb_pools.find(pool, pos))
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{
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dbb_pools.remove(pos);
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}
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MemoryPool::deletePool(pool);
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}
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}
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SLONG Database::genSharedUniqueNumber(thread_db* tdbb)
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{
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const int SHARED_COUNTER_CACHE_SIZE = 16;
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if (!dbb_sh_counter_lock)
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{
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Lock* lock = FB_NEW_RPT(*dbb_permanent, sizeof(SLONG)) Lock();
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dbb_sh_counter_lock = lock;
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lock->lck_type = LCK_shared_counter;
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lock->lck_owner_handle = LCK_get_owner_handle(tdbb, lock->lck_type);
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lock->lck_parent = dbb_lock;
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lock->lck_length = sizeof(SLONG);
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lock->lck_key.lck_long = 0;
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lock->lck_dbb = this;
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lock->lck_ast = blockingAstSharedCounter;
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lock->lck_object = this;
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LCK_lock(tdbb, lock, LCK_PW, LCK_WAIT);
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dbb_sh_counter_curr = 1;
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dbb_sh_counter_max = 0;
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}
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if (dbb_sh_counter_curr > dbb_sh_counter_max)
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{
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LCK_convert(tdbb, dbb_sh_counter_lock, LCK_PW, LCK_WAIT);
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dbb_sh_counter_curr = LCK_read_data(tdbb, dbb_sh_counter_lock);
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dbb_sh_counter_max = dbb_sh_counter_curr + SHARED_COUNTER_CACHE_SIZE - 1;
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LCK_write_data(tdbb, dbb_sh_counter_lock, dbb_sh_counter_max + 1);
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}
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return dbb_sh_counter_curr++;
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}
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int Database::blockingAstSharedCounter(void* ast_object)
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{
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Database* dbb = static_cast<Database*>(ast_object);
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try
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{
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Database::SyncGuard dsGuard(dbb, true);
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ThreadContextHolder tdbb;
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tdbb->setDatabase(dbb);
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// tdbb->setAttachment(dbb->dbb_sh_counter_lock->lck_attachment);
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Jrd::ContextPoolHolder context(tdbb, dbb->dbb_permanent);
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LCK_downgrade(tdbb, dbb->dbb_sh_counter_lock);
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}
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catch (const Firebird::Exception&)
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{} // no-op
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return 0;
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}
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} // namespace
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