al_boundary.c File Reference

Check if the local beginnings or endings of an array correspond to the global beginnings or endings. More...

#include "al_hidden.h"

Include dependency graph for al_boundary.c:

Go to the source code of this file.

Functions
int	AL_Is_boundary (int sz_ptr, int *is_gbeg, int *is_gend)

Variables
SZ *	sz_stack [AL_MAX_ARRAYS]
int	stack_ptr [AL_MAX_ARRAYS]

Detailed Description

Check if the local beginnings or endings of an array correspond to the global beginnings or endings.

Check if the local beginnings or endings of an array correspond to the global beginnings or endings.

Author

A. Malagoli (University of Chicago)

Date

Jul 17, 1999

Definition in file al_boundary.c.

Function Documentation

int AL_Is_boundary	(	int	sz_ptr,
		int *	is_gbeg,
		int *	is_gend
	)

This routine is useful when implementing the physical boundary conditions on a problem. It returns two arrays that are set to AL_TRUE or AL_FALSE depending on wether or not the local beginning (ending) address for the array in each direction is actually a global one.

Parameters

[in]	sz_ptr	pointer to a distributed array descriptor (integer)
[out]	is_gbeg	int array set to AL_TRUE or AL_FALSE for global beginning
[out]	is_gend	int array set to AL_TRUE or AL_FALSE for global ending

Definition at line 28 of file al_boundary.c.

{
  register int i;
  int myrank, nproc,ndims;
  MPI_Comm comm;
  SZ *s;

  /* DIAGNOSTICS
    Check that sz_ptr points to an allocated SZ
  */
  if( stack_ptr[sz_ptr] == AL_STACK_FREE){
    printf("AL_Is_boundary: wrong SZ pointer\n");
  }

  s = sz_stack[sz_ptr];

  myrank = s->rank;
  nproc  = s->size;
  comm   = s->comm;
  ndims  = s->ndim;

  for(i=0;i<ndims;i++){
    if( s->beg[i]  == s->bg[i] ){
      is_gbeg[i] = AL_TRUE;
    } else {
      is_gbeg[i] = AL_FALSE;
    }
    if( s->end[i] == s->arrdim[i]+s->bg[i]-1 ){
      is_gend[i] = AL_TRUE;
    } else {
      is_gend[i] = AL_FALSE;
    }
  }

  /* DIAGNOSTICS */
#ifdef DEBUG
    printf("AL_Is_boundary: completed\n");
#endif

  return (int) AL_SUCCESS;
}

Here is the caller graph for this function:

Variable Documentation

int stack_ptr[AL_MAX_ARRAYS]

Definition at line 26 of file al_szptr_.c.

SZ* sz_stack[AL_MAX_ARRAYS]

Definition at line 18 of file al_szptr_.c.