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//# ExternalLockSync.cc: Class to hold table lock data
//# Copyright (C) 1997,1998
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
//# Includes
#include <casacore/tables/Tables/ExternalLockSync.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
ExternalLockSync::ExternalLockSync (const TableLock& lockOptions)
: itsLock (lockOptions, releaseCallBack, this),
itsNrrow (0)
{}
ExternalLockSync::~ExternalLockSync()
{}
void ExternalLockSync::makeLock (const String& tableName,
Bool create, FileLocker::LockType type)
{
itsLock.makeLock (tableName, create, type);
}
Bool ExternalLockSync::acquire (FileLocker::LockType type, uInt nattempts)
{
if (! itsLock.acquire (&(itsSync.memoryIO()), type, nattempts)) {
return False;
}
uInt nrcol;
Bool tableChanged;
Block<Bool> dataManChanged;
itsSync.read (itsNrrow, nrcol, tableChanged, dataManChanged);
return True;
}
MemoryIO* ExternalLockSync::releaseCallBack (void* lockSyncObject, Bool always)
{
return (*(ExternalLockSync*)lockSyncObject).doReleaseCallBack (always);
}
} //# NAMESPACE CASACORE - END
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