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/*@@
@file ReductionCount.c
@date Thu Apr 3 11:54:53 1997
@author Thomas Radke
@desc
Defines the PUGH reduction operator "count" to get the number of
grid points of an arbitrary array.
@enddesc
@version $Id$
@@*/
#include <stdlib.h>
#include <string.h>
#include "pugh_reductions.h"
static const char *rcsid = "$Id$";
CCTK_FILEVERSION(CactusPUGH_PUGHReduce_ReductionCount_c)
/* local function prototypes */
static int ReductionCount (const cGH *GH,
int proc,
int num_dims,
const int from[/* dim */],
const int to[/* dim */],
int iterator[/* dim */],
const int points_per_dim[/* dim */],
int num_points,
int have_local_points,
int num_inarrays,
const int intypes[/* num_inarrays */],
const void *const inarrays[/* num_inarrays */],
int num_outvals,
CCTK_REAL outvals[/*num_inarrays*num_outvals*/]);
/*@@
@routine PUGH_ReductionCountArrays
@author Thomas Radke
@date 19 Aug 1999
@desc
Registered PUGH reduction routine for computing the counts
of a set of arrays.
The arrays are described by their dimensions and variable type.
For the number of output values only 1 is accepted.
Type casting of the result is provided by specifying the
requested output datatype. The intermediate reduction value
is always computed as a CCTK_REAL value internally.
@enddesc
@var GH
@vdesc Pointer to CCTK grid hierarchy
@vtype const cGH *
@vio in
@endvar
@var proc
@vdesc processor that should receive the result of operation
(negative value means all processors receive the result)
@vtype int
@vio in
@endvar
@var nDims
@vdesc number of dimensions of input arrays
@vtype int
@vio in
@endvar
@var dims
@vdesc dimensions of input arrays
@vtype const int *
@vio in
@endvar
@var nArrays
@vdesc number of input arrays
@vtype int
@vio in
@endvar
@var inarrays
@vdesc field of input arrays
@vtype const void *const
@vio in
@endvar
@var inType
@vdesc (common) variable type of input arrays
@vtype int
@vio in
@endvar
@var num_outvals
@vdesc number of values per output array
@vtype int
@vio in
@endvar
@var outvals
@vdesc pointer to buffer holding the output values
@vtype void *
@vio in
@endvar
@var outtype
@vdesc (common) variable type of output arrays
@vtype int
@vio in
@endvar
@@*/
int PUGH_ReductionCountArrays (const cGH *GH,
int proc,
int num_dims,
const int dims[/* num_dims */],
int num_inarrays,
const void *const inarrays[/* num_inarrays */],
int intype,
int num_outvals,
void *outvals /* [num_outvals] */,
int outtype)
{
return (PUGH_ReductionArrays (GH, proc, num_dims, dims,
intype, num_inarrays, inarrays,
outtype, num_outvals, outvals,
ReductionCount));
}
/*@@
@routine PUGH_ReductionCountGVs
@author Thomas Radke
@date 23 Apr 1999
@desc
PUGH reduction routine to be registered for calculating the count.
It just goes through the list of variables and calls the appropriate
grouptype reduction routine.
If the number of requested output values equals the size of the
variable, global reduction is done element-wise.
Otherwise num_outvals must be 1, and global reduction is done on the
results of the local reductions.
@enddesc
@var GH
@vdesc Pointer to CCTK grid hierarchy
@vtype const cGH *
@vio in
@endvar
@var proc
@vdesc processor that should receive the result of operation
(negative value means all processors receive the result)
@vtype int
@vio in
@endvar
@var num_outvals
@vdesc number of requested output elements
@vtype int
@vio in
@endvar
@var outtype
@vdesc type of return value
@vtype int
@vio in
@endvar
@var outvals
@vdesc array for the result values to be stored
@vtype void *
@vio in
@endvar
@var num_invars
@vdesc number of variables in the list
@vtype int
@vio in
@endvar
@var invars
@vdesc list of variables (given as their global indices)
@vtype const int *
@vio in
@endvar
@@*/
int PUGH_ReductionCountGVs (const cGH *GH,
int proc,
int num_outvals,
int outtype,
void *outvals /* [num_outvals] */,
int num_invars,
const int invars[/* num_invars */])
{
return (PUGH_ReductionGVs (GH, proc, num_invars, invars,
outtype, num_outvals, outvals,
ReductionCount));
}
/*****************************************************************************/
/* local functions */
/*****************************************************************************/
/*@@
@routine ReductionCount
@date Aug 19 1999
@author Thomas Radke
@desc
Returns the number of grid points of a distributed array
@enddesc
@@*/
static int ReductionCount (const cGH *GH,
int proc,
int num_dims,
const int from[/* dim */],
const int to[/* dim */],
int iterator[/* dim */],
const int points_per_dim[/* dim */],
int num_points,
int have_local_points,
int num_inarrays,
const int intypes[/* num_inarrays */],
const void *const inarrays[/* num_inarrays */],
int num_outvals,
CCTK_REAL outvals[/*num_inarrays*num_outvals*/])
{
int i;
/* avoid compiler warnings about unused parameters */
(void) (GH + 0);
(void) (proc + 0);
(void) (num_dims + 0);
(void) (from + 0);
(void) (to + 0);
(void) (iterator + 0);
(void) (points_per_dim + 0);
(void) (have_local_points + 0);
(void) (intypes + 0);
(void) (inarrays + 0);
(void) (num_outvals + 0);
/* assign the return value */
if (proc < 0 || proc == CCTK_MyProc (GH))
{
for (i = 0; i < num_inarrays; i++)
{
outvals[i] = num_points;
}
}
return (0);
}
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