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 */
22: PetscInitialize(&argc, &args, (char *)0, help);
23: fd = PETSC_VIEWER_SOCKET_WORLD;
25: VecCreate(PETSC_COMM_WORLD, &b);
26: VecLoad(b, fd);
27: MatCreate(PETSC_COMM_WORLD, &A);
28: MatLoad(A, fd);
29: VecDuplicate(b, &x);
31: KSPCreate(PETSC_COMM_WORLD, &ksp);
32: KSPSetOperators(ksp, A, A);
33: KSPSetFromOptions(ksp);
34: KSPSetUp(ksp);
35: KSPSolve(ksp, b, x);
36: VecView(x, fd);
37: MatDestroy(&A);
38: VecDestroy(&b);
39: VecDestroy(&x);
40: KSPDestroy(&ksp);
42: PetscFinalize();
43: return 0;
44: }
46: /*TEST
48: build:
49: requires: defined(PETSC_USE_SOCKET_VIEWER)
51: test:
52: TODO: Need to figure out how to test examples that use sockets
54: TEST*/