lammps/src/memory.cpp

/* ----------------------------------------------------------------------
   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 "lmptype.h"
#include "mpi.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "memory.h"
#include "error.h"

using namespace LAMMPS_NS;

/* ---------------------------------------------------------------------- */

Memory::Memory(LAMMPS *lmp) : Pointers(lmp) {}

/* ----------------------------------------------------------------------
   safe malloc 
------------------------------------------------------------------------- */

void *Memory::smalloc(bigint nbytes, const char *name)
{
  if (nbytes == 0) return NULL;

  void *ptr = malloc(nbytes);
  if (ptr == NULL) {
    char str[128];
    sprintf(str,"Failed to allocate " BIGINT_FORMAT "bytes for array %s",
	    nbytes,name);
    error->one(str);
  }
  return ptr;
}

/* ----------------------------------------------------------------------
   safe realloc 
------------------------------------------------------------------------- */

void *Memory::srealloc(void *ptr, bigint nbytes, const char *name)
{
  if (nbytes == 0) {
    sfree(ptr);
    return NULL;
  }

  ptr = realloc(ptr,nbytes);
  if (ptr == NULL) {
    char str[128];
    sprintf(str,"Failed to reallocate " BIGINT_FORMAT "bytes for array %s",
	    nbytes,name);
    error->one(str);
  }
  return ptr;
}

/* ----------------------------------------------------------------------
   safe free 
------------------------------------------------------------------------- */

void Memory::sfree(void *ptr)
{
  if (ptr == NULL) return;
  free(ptr);
}

/* ----------------------------------------------------------------------
   erroneous usage of templated create/grow functions
------------------------------------------------------------------------- */

void Memory::fail(const char *name)
{
  char str[128];
  sprintf(str,"Cannot create/grow a vector/array of pointers for %s",name);
  error->one(str);
}