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mbptr12
r12ia_node0file.h
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//
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// r12ia_node0file.h
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//
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// Copyright (C) 2002 Edward Valeev
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//
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// Author: Edward Valeev <edward.valeev@chemistry.gatech.edu>
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// Maintainer: EV
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//
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// This file is part of the SC Toolkit.
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//
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// The SC Toolkit is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Library General Public License as published by
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// the Free Software Foundation; either version 2, or (at your option)
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// any later version.
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//
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// The SC Toolkit is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public License
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// along with the SC Toolkit; see the file COPYING.LIB. If not, write to
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// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// The U.S. Government is granted a limited license as per AL 91-7.
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//
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#ifndef _chemistry_qc_mbptr12_r12ia_node0file_h
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#define _chemistry_qc_mbptr12_r12ia_node0file_h
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#ifdef __GNUC__
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#pragma interface
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#endif
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#include <unistd.h>
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#include <util/ref/ref.h>
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#include <util/group/memory.h>
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#include <chemistry/qc/mbptr12/r12ia.h>
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namespace
sc {
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// R12IntsAcc_Node0File handles transformed integrals stored in file
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// on node 0 (file is a usual POSIX binary file)
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//
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// Transfering integrals to the file from nodes is done via MemoryGrp
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// given as an argument to store_memorygrp
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// Remote retrieval is not possible
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//
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// The ordering of integrals in blocks is not specified
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// to avoid having to reorder integrals
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// Each pair block has size of num_te_types*nbasis1*nbasis2
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class
R12IntsAcc_Node0File
:
public
R12IntsAcc
{
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Ref<MemoryGrp>
mem_;
// The MemoryGrp associated with this accumulator
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char
*filename_;
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int
datafile_;
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struct
PairBlkInfo {
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double
* ints_[max_num_te_types_];
// blocks corresponding to each operator type
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int
refcount_[max_num_te_types_];
// number of references
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off_t offset_;
// location in file (in bytes)
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} *pairblk_;
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// Initialization tasks common to all constructors
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void
init(
bool
restart);
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// Check if the file operation went OK
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void
check_filedescr_();
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int
ntasks()
const
{
return
mem_->n(); }
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int
taskid()
const
{
return
mem_->me(); }
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public
:
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R12IntsAcc_Node0File
(
Ref<MemoryGrp>
& mem,
const
char
*filename,
int
num_te_types
,
int
ni
,
int
nj
,
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int
nx
,
int
ny
);
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R12IntsAcc_Node0File
(
StateIn
&);
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~
R12IntsAcc_Node0File
();
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void
save_data_state
(
StateOut
&);
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void
store_memorygrp
(
Ref<MemoryGrp>
& mem,
int
ni,
const
size_t
blksize = 0);
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void
store_pair_block
(
int
i,
int
j,
double
*ints);
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void
commit
();
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void
activate
();
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void
deactivate
();
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double
*
retrieve_pair_block
(
int
i,
int
j,
tbint_type
oper_type);
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void
release_pair_block
(
int
i,
int
j,
tbint_type
oper_type);
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bool
is_local
(
int
i,
int
j)
const
{
return
(mem_->me() == 0);};
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bool
is_avail
(
int
i,
int
j)
const
{
return
(mem_->me() == 0);};
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bool
has_access
(
int
proc)
const
{
return
(proc == 0);};
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bool
can_restart
()
const
{
return
true
; };
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// Utility functions
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int
ij_index(
int
i,
int
j)
const
{
return
i*nj_ + j; };
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int
ij_proc(
int
i,
int
j)
const
{
return
0;};
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};
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}
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#endif
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// Local Variables:
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// mode: c++
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// c-file-style: "CLJ"
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// End:
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