int main(int argc,char **argv)
{
PetscErrorCode ierr;
PetscMPIInt rank;
char buffer[256],*output,user[256];
PetscBool userhappy = PETSC_FALSE;
PetscInitialize(&argc,&argv,(char*)0,help);
ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
ierr = PetscMatlabEngineGetOutput(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),&output);CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),"MPI_Comm_rank");CHKERRQ(ierr);
ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]Processor rank is %s",rank,output);CHKERRQ(ierr);
ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD,">>");CHKERRQ(ierr);
ierr = PetscSynchronizedFGets(PETSC_COMM_WORLD,stdin,256,user);CHKERRQ(ierr);
ierr = PetscStrncmp(user,"exit",4,&userhappy);CHKERRQ(ierr);
while (!userhappy) {
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),user);CHKERRQ(ierr);
ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]The result is %s",rank,output);CHKERRQ(ierr);
ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD,">>");CHKERRQ(ierr);
ierr = PetscSynchronizedFGets(PETSC_COMM_WORLD,stdin,256,user);CHKERRQ(ierr);
ierr = PetscStrncmp(user,"exit",4,&userhappy);CHKERRQ(ierr);
}
ierr = PetscFinalize();
return 0;
}
PetscErrorCode MatSolve_Matlab(Mat A,Vec b,Vec x)
{
PetscErrorCode ierr;
const char *_A,*_b,*_x;
PetscFunctionBegin;
/* make sure objects have names; use default if not */
ierr = PetscObjectName((PetscObject)b);
CHKERRQ(ierr);
ierr = PetscObjectName((PetscObject)x);
CHKERRQ(ierr);
ierr = PetscObjectGetName((PetscObject)A,&_A);
CHKERRQ(ierr);
ierr = PetscObjectGetName((PetscObject)b,&_b);
CHKERRQ(ierr);
ierr = PetscObjectGetName((PetscObject)x,&_x);
CHKERRQ(ierr);
ierr = PetscMatlabEnginePut(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),(PetscObject)b);
CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"%s = u%s\\(l%s\\(p%s*%s));",_x,_A,_A,_A,_b);
CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"%s = 0;",_b);
CHKERRQ(ierr);
/* ierr = PetscMatlabEnginePrintOutput(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),stdout);CHKERRQ(ierr); */
ierr = PetscMatlabEngineGet(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),(PetscObject)x);
CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode FormFunctionMatlab(SNES snes,Vec X,Vec F,void *ptr)
{
AppCtx *user = (AppCtx*)ptr;
PetscErrorCode ierr;
PetscInt Mx,My;
PetscReal lambda,hx,hy;
Vec localX,localF;
MPI_Comm comm;
DM da;
PetscFunctionBeginUser;
ierr = SNESGetDM(snes,&da);CHKERRQ(ierr);
ierr = DMGetLocalVector(da,&localX);CHKERRQ(ierr);
ierr = DMGetLocalVector(da,&localF);CHKERRQ(ierr);
ierr = PetscObjectSetName((PetscObject)localX,"localX");CHKERRQ(ierr);
ierr = PetscObjectSetName((PetscObject)localF,"localF");CHKERRQ(ierr);
ierr = DMDAGetInfo(da,PETSC_IGNORE,&Mx,&My,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE);CHKERRQ(ierr);
lambda = user->param;
hx = 1.0/(PetscReal)(Mx-1);
hy = 1.0/(PetscReal)(My-1);
ierr = PetscObjectGetComm((PetscObject)snes,&comm);CHKERRQ(ierr);
/*
Scatter ghost points to local vector,using the 2-step process
DMGlobalToLocalBegin(),DMGlobalToLocalEnd().
By placing code between these two statements, computations can be
done while messages are in transition.
*/
ierr = DMGlobalToLocalBegin(da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
ierr = DMGlobalToLocalEnd(da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
ierr = PetscMatlabEnginePut(PETSC_MATLAB_ENGINE_(comm),(PetscObject)localX);CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(comm),"localF=ex5m(localX,%18.16e,%18.16e,%18.16e)",hx,hy,lambda);CHKERRQ(ierr);
ierr = PetscMatlabEngineGet(PETSC_MATLAB_ENGINE_(comm),(PetscObject)localF);CHKERRQ(ierr);
/*
Insert values into global vector
*/
ierr = DMLocalToGlobalBegin(da,localF,INSERT_VALUES,F);CHKERRQ(ierr);
ierr = DMLocalToGlobalEnd(da,localF,INSERT_VALUES,F);CHKERRQ(ierr);
ierr = DMRestoreLocalVector(da,&localX);CHKERRQ(ierr);
ierr = DMRestoreLocalVector(da,&localF);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode MatDestroy_matlab(Mat A)
{
PetscErrorCode ierr;
const char *_A;
PetscFunctionBegin;
ierr = PetscObjectGetName((PetscObject)A,&_A);CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"delete %s l_%s u_%s;",_A,_A,_A);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode MatLUFactorNumeric_Matlab(Mat F,Mat A,const MatFactorInfo *info)
{
PetscErrorCode ierr;
size_t len;
char *_A,*name;
PetscReal dtcol = info->dtcol;
PetscFunctionBegin;
if (F->factortype == MAT_FACTOR_ILU || info->dt > 0) {
/* the ILU form is not currently registered */
if (info->dtcol == PETSC_DEFAULT) dtcol = .01;
F->ops->solve = MatSolve_Matlab;
F->factortype = MAT_FACTOR_LU;
ierr = PetscMatlabEnginePut(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),(PetscObject)A);
CHKERRQ(ierr);
_A = ((PetscObject)A)->name;
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"info_%s = struct('droptol',%g,'thresh',%g);",_A,info->dt,dtcol);
CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"[l_%s,u_%s,p_%s] = luinc(%s',info_%s);",_A,_A,_A,_A,_A);
CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"%s = 0;",_A);
CHKERRQ(ierr);
ierr = PetscStrlen(_A,&len);
CHKERRQ(ierr);
ierr = PetscMalloc1(len+2,&name);
CHKERRQ(ierr);
sprintf(name,"_%s",_A);
ierr = PetscObjectSetName((PetscObject)F,name);
CHKERRQ(ierr);
ierr = PetscFree(name);
CHKERRQ(ierr);
} else {
ierr = PetscMatlabEnginePut(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),(PetscObject)A);
CHKERRQ(ierr);
_A = ((PetscObject)A)->name;
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"[l_%s,u_%s,p_%s] = lu(%s',%g);",_A,_A,_A,_A,dtcol);
CHKERRQ(ierr);
ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PetscObjectComm((PetscObject)A)),"%s = 0;",_A);
CHKERRQ(ierr);
ierr = PetscStrlen(_A,&len);
CHKERRQ(ierr);
ierr = PetscMalloc1(len+2,&name);
CHKERRQ(ierr);
sprintf(name,"_%s",_A);
ierr = PetscObjectSetName((PetscObject)F,name);
CHKERRQ(ierr);
ierr = PetscFree(name);
CHKERRQ(ierr);
F->ops->solve = MatSolve_Matlab;
}
PetscFunctionReturn(0);
}