Actual source code: ex41.c
2: static char help[] = "Reads a PETSc matrix and vector from a socket connection, solves a linear system and sends the result back.\n";
4: /*
5: Include "petscksp.h" so that we can use KSP solvers. Note that this file
6: automatically includes:
7: petscsys.h - base PETSc routines petscvec.h - vectors
8: petscmat.h - matrices
9: petscis.h - index sets petscksp.h - Krylov subspace methods
10: petscviewer.h - viewers petscpc.h - preconditioners
11: */
12: #include <petscksp.h>
14: int main(int argc,char **args)
15: {
16: KSP ksp; /* linear solver context */
17: Mat A; /* matrix */
18: Vec x,b; /* approx solution, RHS, exact solution */
19: PetscViewer fd; /* viewer */
21: PetscInitialize(&argc,&args,(char*)0,help);
22: fd = PETSC_VIEWER_SOCKET_WORLD;
24: VecCreate(PETSC_COMM_WORLD,&b);
25: VecLoad(b,fd);
26: MatCreate(PETSC_COMM_WORLD,&A);
27: MatLoad(A,fd);
28: VecDuplicate(b,&x);
30: KSPCreate(PETSC_COMM_WORLD,&ksp);
31: KSPSetOperators(ksp,A,A);
32: KSPSetFromOptions(ksp);
33: KSPSetUp(ksp);
34: KSPSolve(ksp,b,x);
35: VecView(x,fd);
36: MatDestroy(&A);
37: VecDestroy(&b);
38: VecDestroy(&x);
39: KSPDestroy(&ksp);
41: PetscFinalize();
42: return 0;
43: }
45: /*TEST
47: build:
48: requires: defined(PETSC_USE_SOCKET_VIEWER)
50: test:
51: TODO: Need to figure out how to test examples that use sockets
53: TEST*/