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lammps/src/USER-CUDA/fix_npt_cuda.cpp
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fix_npt_cuda.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#include <cstring>
#include "fix_npt_cuda.h"
#include "modify.h"
#include "error.h"
#include "cuda_modify_flags.h"
using namespace LAMMPS_NS;
using namespace FixConst;
using namespace FixConstCuda;
/* ---------------------------------------------------------------------- */
FixNPTCuda::FixNPTCuda(LAMMPS *lmp, int narg, char **arg) :
FixNHCuda(lmp, narg, arg)
{
cuda = lmp->cuda;
if(cuda == NULL)
error->all(FLERR,"You cannot use a /cuda class, without activating 'cuda' acceleration. Provide '-c on' as command-line argument to LAMMPS..");
if (!tstat_flag)
error->all(FLERR,"Temperature control must be used with fix npt");
if (!pstat_flag)
error->all(FLERR,"Pressure control must be used with fix npt");
// create a new compute temp style
// id = fix-ID + temp
// compute group = all since pressure is always global (group all)
// and thus its KE/temperature contribution should use group all
int n = strlen(id) + 6;
id_temp = new char[n];
strcpy(id_temp,id);
strcat(id_temp,"_temp");
char **newarg = new char*[3];
newarg[0] = id_temp;
newarg[1] = (char *) "all";
newarg[2] = (char *) "temp/cuda";
modify->add_compute(3,newarg);
delete [] newarg;
tflag = 1;
// create a new compute pressure style
// id = fix-ID + press, compute group = all
// pass id_temp as 4th arg to pressure constructor
n = strlen(id) + 7;
id_press = new char[n];
strcpy(id_press,id);
strcat(id_press,"_press");
newarg = new char*[4];
newarg[0] = id_press;
newarg[1] = (char *) "all";
newarg[2] = (char *) "pressure/cuda";
newarg[3] = id_temp;
modify->add_compute(4,newarg);
delete [] newarg;
pflag = 1;
}
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