mirror of
https://github.com/FirebirdSQL/firebird.git
synced 2025-01-31 15:23:03 +01:00
149 lines
3.2 KiB
C++
149 lines
3.2 KiB
C++
/*
|
|
* The contents of this file are subject to the Initial
|
|
* Developer's Public License Version 1.0 (the "License");
|
|
* you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
|
|
*
|
|
* Software distributed under the License is distributed AS IS,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing rights
|
|
* and limitations under the License.
|
|
*
|
|
* The Original Code was created by Dmitry Yemanov
|
|
* for the Firebird Open Source RDBMS project.
|
|
*
|
|
* Copyright (c) 2009 Dmitry Yemanov <dimitr@firebirdsql.org>
|
|
* and all contributors signed below.
|
|
*
|
|
* All Rights Reserved.
|
|
* Contributor(s): ______________________________________.
|
|
*/
|
|
|
|
#include "firebird.h"
|
|
#include "../jrd/common.h"
|
|
#include "../jrd/jrd.h"
|
|
#include "../jrd/req.h"
|
|
#include "../jrd/cmp_proto.h"
|
|
|
|
#include "RecordSource.h"
|
|
|
|
using namespace Firebird;
|
|
using namespace Jrd;
|
|
|
|
// ------------------------------------
|
|
// Data access: stream locked for write
|
|
// ------------------------------------
|
|
|
|
LockedStream::LockedStream(CompilerScratch* csb, RecordSource* next)
|
|
: m_next(next)
|
|
{
|
|
fb_assert(m_next);
|
|
|
|
m_impure = CMP_impure(csb, sizeof(Impure));
|
|
}
|
|
|
|
void LockedStream::open(thread_db* tdbb) const
|
|
{
|
|
jrd_req* const request = tdbb->getRequest();
|
|
Impure* const impure = request->getImpure<Impure>(m_impure);
|
|
|
|
impure->irsb_flags = irsb_open;
|
|
|
|
m_next->open(tdbb);
|
|
}
|
|
|
|
void LockedStream::close(thread_db* tdbb) const
|
|
{
|
|
jrd_req* const request = tdbb->getRequest();
|
|
|
|
invalidateRecords(request);
|
|
|
|
Impure* const impure = request->getImpure<Impure>(m_impure);
|
|
|
|
if (impure->irsb_flags & irsb_open)
|
|
{
|
|
impure->irsb_flags &= ~irsb_open;
|
|
|
|
m_next->close(tdbb);
|
|
}
|
|
}
|
|
|
|
bool LockedStream::getRecord(thread_db* tdbb) const
|
|
{
|
|
jrd_req* const request = tdbb->getRequest();
|
|
Impure* const impure = request->getImpure<Impure>(m_impure);
|
|
|
|
if (!(impure->irsb_flags & irsb_open))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
while (m_next->getRecord(tdbb))
|
|
{
|
|
// Refetch the record and ensure it still fulfils the search condition
|
|
while (m_next->refetchRecord(tdbb))
|
|
{
|
|
// Attempt to lock the record
|
|
if (m_next->lockRecord(tdbb))
|
|
{
|
|
return true; // locked
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool LockedStream::refetchRecord(thread_db* tdbb) const
|
|
{
|
|
return m_next->refetchRecord(tdbb);
|
|
}
|
|
|
|
bool LockedStream::lockRecord(thread_db* tdbb) const
|
|
{
|
|
return m_next->lockRecord(tdbb);
|
|
}
|
|
|
|
void LockedStream::dump(thread_db* tdbb, UCharBuffer& buffer) const
|
|
{
|
|
buffer.add(isc_info_rsb_begin);
|
|
|
|
buffer.add(isc_info_rsb_type);
|
|
buffer.add(isc_info_rsb_writelock);
|
|
|
|
m_next->dump(tdbb, buffer);
|
|
|
|
buffer.add(isc_info_rsb_end);
|
|
}
|
|
|
|
void LockedStream::markRecursive()
|
|
{
|
|
m_next->markRecursive();
|
|
}
|
|
|
|
void LockedStream::findUsedStreams(StreamsArray& streams) const
|
|
{
|
|
m_next->findUsedStreams(streams);
|
|
}
|
|
|
|
void LockedStream::invalidateRecords(jrd_req* request) const
|
|
{
|
|
m_next->invalidateRecords(request);
|
|
}
|
|
|
|
void LockedStream::nullRecords(thread_db* tdbb) const
|
|
{
|
|
m_next->nullRecords(tdbb);
|
|
}
|
|
|
|
void LockedStream::saveRecords(thread_db* tdbb) const
|
|
{
|
|
m_next->saveRecords(tdbb);
|
|
}
|
|
|
|
void LockedStream::restoreRecords(thread_db* tdbb) const
|
|
{
|
|
m_next->restoreRecords(tdbb);
|
|
}
|