Actual source code: bvec3.c

petsc-3.4.4 2014-03-13
  2: /*
  3:    Implements the sequential vectors.
  4: */

  6: #include <../src/vec/vec/impls/dvecimpl.h>          /*I "petscvec.h" I*/
  7: #include <petscthreadcomm.h>
  8: /*MC
  9:    VECSEQ - VECSEQ = "seq" - The basic sequential vector

 11:    Options Database Keys:
 12: . -vec_type seq - sets the vector type to VECSEQ during a call to VecSetFromOptions()

 14:   Level: beginner

 16: .seealso: VecCreate(), VecSetType(), VecSetFromOptions(), VecCreateSeqWithArray(), VECMPI, VecType, VecCreateMPI(), VecCreateSeq()
 17: M*/

 19: #if defined(PETSC_USE_MIXED_PRECISION)
 20: extern PetscErrorCode VecCreate_Seq_Private(Vec,const float*);
 21: extern PetscErrorCode VecCreate_Seq_Private(Vec,const double*);
 22: #endif

 26: PETSC_EXTERN PetscErrorCode VecCreate_Seq(Vec V)
 27: {
 28:   Vec_Seq        *s;
 29:   PetscScalar    *array;
 31:   PetscInt       n = PetscMax(V->map->n,V->map->N);
 32:   PetscMPIInt    size;

 35:   MPI_Comm_size(PetscObjectComm((PetscObject)V),&size);
 36:   if (size > 1) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"Cannot create VECSEQ on more than one process");
 37: #if !defined(PETSC_USE_MIXED_PRECISION)
 38:   PetscMalloc(n*sizeof(PetscScalar),&array);
 39:   PetscLogObjectMemory(V, n*sizeof(PetscScalar));
 40:   VecCreate_Seq_Private(V,array);

 42:   s                  = (Vec_Seq*)V->data;
 43:   s->array_allocated = array;

 45:   VecSet(V,0.0);
 46: #else
 47:   switch (((PetscObject)V)->precision) {
 48:   case PETSC_PRECISION_SINGLE: {
 49:     float *aarray;

 51:     PetscMalloc(n*sizeof(float),&aarray);
 52:     PetscLogObjectMemory(V, n*sizeof(float));
 53:     PetscMemzero(aarray,n*sizeof(float));
 54:     VecCreate_Seq_Private(V,aarray);

 56:     s                  = (Vec_Seq*)V->data;
 57:     s->array_allocated = (PetscScalar*)aarray;
 58:   } break;
 59:   case PETSC_PRECISION_DOUBLE: {
 60:     double *aarray;

 62:     PetscMalloc(n*sizeof(double),&aarray);
 63:     PetscLogObjectMemory(V, n*sizeof(double));
 64:     PetscMemzero(aarray,n*sizeof(double));
 65:     VecCreate_Seq_Private(V,aarray);

 67:     s                  = (Vec_Seq*)V->data;
 68:     s->array_allocated = (PetscScalar*)aarray;
 69:   } break;
 70:   default: SETERRQ1(PetscObjectComm((PetscObject)V),PETSC_ERR_SUP,"No support for mixed precision %d",(int)(((PetscObject)V)->precision));
 71:   }
 72: #endif
 73:   return(0);
 74: }