/usr/include/casacore/lattices/Lattices/TempLatticeImpl.tcc is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | //# TempLatticeImpl.cc: A Lattice that can be used for temporary storage
//# Copyright (C) 1997,1998,1999,2000,2001,2003
//# 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
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//# $Id: TempLatticeImpl.tcc 20739 2009-09-29 01:15:15Z Malte.Marquarding $
#ifndef LATTICES_TEMPLATTICEIMPL_TCC
#define LATTICES_TEMPLATTICEIMPL_TCC
#include <casacore/lattices/Lattices/TempLatticeImpl.h>
#include <casacore/lattices/Lattices/PagedArray.h>
#include <casacore/lattices/Lattices/ArrayLattice.h>
#include <casacore/tables/Tables/Table.h>
#include <casacore/tables/Tables/SetupNewTab.h>
#include <casacore/tables/Tables/TableDesc.h>
#include <casacore/casa/Arrays/IPosition.h>
#include <casacore/casa/System/AppInfo.h>
#include <casacore/casa/OS/HostInfo.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
template<class T>
TempLatticeImpl<T>::TempLatticeImpl()
: itsTablePtr (0),
itsIsClosed (False)
{
itsLatticePtr = new ArrayLattice<T>;
}
template<class T>
TempLatticeImpl<T>::TempLatticeImpl (const TiledShape& shape, Int maxMemoryInMB)
: itsTablePtr (0),
itsIsClosed (False)
{
init (shape, Double(maxMemoryInMB));
}
template<class T>
TempLatticeImpl<T>::TempLatticeImpl (const TiledShape& shape, Double maxMemoryInMB)
: itsTablePtr (0),
itsIsClosed (False)
{
init(shape, maxMemoryInMB);
}
template<class T>
TempLatticeImpl<T>::~TempLatticeImpl()
{
// Reopen to make sure that temporary table gets deleted.
doReopen();
delete itsTablePtr;
}
template<class T>
void TempLatticeImpl<T>::init (const TiledShape& shape, Double maxMemoryInMB)
{
Double memoryReq = Double(shape.shape().product()*sizeof(T))/(1024.0*1024.0);
Double memoryAvail;
// maxMemoryInMb = 0.0 forces disk.
if (maxMemoryInMB < 0.0) {
memoryAvail = Double(HostInfo::memoryFree()/1024) / 2.0;
} else {
memoryAvail = maxMemoryInMB;
}
if (memoryReq > memoryAvail) {
// Create a table with a unique name in a work directory.
// We can use exclusive locking, since nobody else should use the table.
itsTableName = AppInfo::workFileName (Int(memoryReq), "TempLattice");
SetupNewTable newtab (itsTableName, TableDesc(), Table::Scratch);
itsTablePtr = new Table (newtab, TableLock::PermanentLockingWait);
itsLatticePtr = new PagedArray<T> (shape, *itsTablePtr);
} else {
itsLatticePtr = new ArrayLattice<T> (shape.shape());
}
}
template<class T>
void TempLatticeImpl<T>::tempClose()
{
if (itsTablePtr != 0 && isPaged()) {
// Take care that table does not get deleted, otherwise we cannot reopen.
itsTablePtr->unmarkForDelete();
delete itsTablePtr;
itsTablePtr = 0;
itsLatticePtr = 0; // CountedPtr does delete of pointer
itsIsClosed = True;
}
}
template<class T>
void TempLatticeImpl<T>::tempReopen() const
{
if (itsIsClosed && isPaged()) {
itsTablePtr = new Table (itsTableName,
TableLock(TableLock::PermanentLockingWait),
Table::Update);
itsLatticePtr = new PagedArray<T> (*itsTablePtr);
itsIsClosed = False;
}
if (itsTablePtr != 0) {
itsTablePtr->markForDelete();
}
}
} //# NAMESPACE CASACORE - END
#endif
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