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/*@@
@file Reduction.c
@date
@author Gabrielle Allen
@desc
This file contains routines to deal with registering and
using functions providing reduction operations.
@enddesc
@@*/
/*#define DEBUG_REDUCTION*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
#include <stdarg.h>
#include "cctk.h"
#include "flesh.h"
#include "FortranString.h"
#include "Groups.h"
#include "StoreHandledData.h"
#include "Reduction.h"
#include "WarnLevel.h"
static char *rcsid = "$Header$";
static cHandledData *ReductionOperators = NULL;
static int num_reductions = 0;
/*@@
@routine CCTK_RegisterReductionOperator
@date April 28 1999
@author Gabrielle Allen
@desc
Registers "function" as a reduction operator called "name"
@enddesc
@var function
@vdesc Routine containing reduction operator
@vtype (void (*))
@vio
@vcomment
@endvar
@var name
@vdesc String containing name of reduction operator
@vtype const char *
@vio in
@vcomment
@endvar
@@*/
int CCTK_RegisterReductionOperator(void (*function)(REGISTER_ARGLIST),
const char *name)
{
int handle;
/* Check that the method hasn't already been registered */
handle = Util_GetHandle(ReductionOperators, name, NULL);
if(handle < 0)
{
/* Get a handle for it. */
handle = Util_NewHandle(&ReductionOperators, name, (void *)function);
/* Remember how many reduction operators there are */
num_reductions++;
}
else
{
/* Reduction operator with this name already exists. */
CCTK_WARN(1,"Reduction operator with this name already exists");
handle = -1;
}
#ifdef DEBUG_REDUCTION
CCTK_PRINTSEPARATOR
printf("In CCTK_RegisterReductionOperator\n");
printf("---------------------------------\n");
printf(" Registering %s with handle %d\n",name,handle);
CCTK_PRINTSEPARATOR
#endif
return handle;
}
/*@@
@routine CCTK_ReductionHandle
@date April 28 1999
@author Gabrielle Allen
@desc
Returns the handle of a given reduction operator
@enddesc
@var reduction
@vdesc String containing name of reduction operator
@vtype const char *
@vio in
@vcomment
@endvar
@@*/
int CCTK_ReductionHandle(const char *reduction)
{
int handle;
void **data=NULL; /* isn't used here */
handle = Util_GetHandle(ReductionOperators, reduction, data);
#ifdef DEBUG_REDUCTION
CCTK_PRINTSEPARATOR
printf("In CCTK_ReductionHandle\n");
printf("-----------------------\n");
printf(" Got handle %d for %s\n",handle,reduction);
CCTK_PRINTSEPARATOR
#endif
if (handle < 0)
CCTK_WARN(1,"No handle found for this reduction operator");
return handle;
}
void FMODIFIER FORTRAN_NAME(CCTK_ReductionHandle)(int *handle, ONE_FORTSTRING_ARG)
{
ONE_FORTSTRING_CREATE(reduction)
*handle = CCTK_ReductionHandle(reduction);
free(reduction);
}
int CCTK_Reduce( cGH *GH,
int proc,
int operation_handle,
int num_out_vals,
int type_out_vals,
void *out_vals,
int num_in_fields,
... )
{
va_list indices;
int i;
int *in_fields = malloc(num_in_fields*sizeof(int));
void (*function)(REGISTER_ARGLIST)=NULL;
/* Get the pointer to the reduction operator */
if (operation_handle < 0)
CCTK_WARN(3,"Invalid handle passed to CCTK_Reduce");
else
{
function = (void (*)(REGISTER_ARGLIST))
Util_GetHandledData(ReductionOperators,operation_handle);
if (function)
{
/* Fill in the array of variable indices from the variable argument list */
va_start(indices, num_in_fields);
for (i=0; i<num_in_fields; i++)
in_fields[i] = va_arg(indices,int);
va_end(indices);
function(GH,proc,num_out_vals,type_out_vals,out_vals,num_in_fields,in_fields);
if (in_fields) free(in_fields);
}
else
CCTK_WARN(3,"Reduction operation is not registered and cannot be called");
}
return 1;
}
void FMODIFIER FORTRAN_NAME(CCTK_Reduce)(cGH *GH,
int *fortranreturn,
int *proc,
int *operation_handle,
int *num_out_vals,
int *type_out_vals,
void *out_vals,
int *num_in_fields,
... )
{
va_list indices;
int i;
int *in_fields = malloc(*num_in_fields*sizeof(int));
void (*function)(REGISTER_ARGLIST)=NULL;
/* Get the pointer to the reduction operator */
if (*operation_handle < 0)
CCTK_WARN(3,"Invalid handle passed to CCTK_Reduce");
else
{
function = (void (*)(REGISTER_ARGLIST))
Util_GetHandledData(ReductionOperators,*operation_handle);
if (function)
{
/* Fill in the array of variable indices from the variable argument list */
va_start(indices, num_in_fields);
for (i=0; i<*num_in_fields; i++)
in_fields[i] = *va_arg(indices,int *);
va_end(indices);
function(GH,*proc,*num_out_vals,*type_out_vals,out_vals,*num_in_fields,in_fields);
if (in_fields) free(in_fields);
}
else
CCTK_WARN(3,"Reduction operation is not registered and cannot be called");
}
*fortranreturn= 1;
}
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