Blame view
fvn_sparse/UMFPACK/Source/umf_mem_init_memoryspace.c
2.13 KB
422234dc3
git-svn-id: https...
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 |
/* ========================================================================== */
/* === UMF_mem_init_memoryspace ============================================= */
/* ========================================================================== */
/* -------------------------------------------------------------------------- */
/* UMFPACK Copyright (c) Timothy A. Davis, CISE, */
/* Univ. of Florida. All Rights Reserved. See ../Doc/License for License. */
/* web: http://www.cise.ufl.edu/research/sparse/umfpack */
/* -------------------------------------------------------------------------- */
/* The UMF_mem_* routines manage the Numeric->Memory memory space. */
#include "umf_internal.h"
/* initialize the LU and element workspace (Numeric->Memory) */
GLOBAL void UMF_mem_init_memoryspace
(
NumericType *Numeric
)
{
Unit *p ;
ASSERT (Numeric != (NumericType *) NULL) ;
ASSERT (Numeric->Memory != (Unit *) NULL) ;
ASSERT (Numeric->size >= 3) ;
DEBUG0 (("Init memory space, size "ID"
", Numeric->size)) ;
Numeric->ngarbage = 0 ;
Numeric->nrealloc = 0 ;
Numeric->ncostly = 0 ;
Numeric->ibig = EMPTY ;
Numeric->ihead = 0 ;
Numeric->itail = Numeric->size ;
#ifndef NDEBUG
UMF_allocfail = FALSE ;
#endif
/* allocate the 2-unit tail marker block and initialize it */
Numeric->itail -= 2 ;
p = Numeric->Memory + Numeric->itail ;
DEBUG2 (("p "ID" tail "ID"
", (Int) (p-Numeric->Memory), Numeric->itail)) ;
Numeric->tail_usage = 2 ;
p->header.prevsize = 0 ;
p->header.size = 1 ;
/* allocate a 1-unit head marker block at the head of memory */
/* this is done so that an offset of zero is treated as a NULL pointer */
Numeric->ihead++ ;
/* initial usage in Numeric->Memory */
Numeric->max_usage = 3 ;
Numeric->init_usage = Numeric->max_usage ;
/* Note that UMFPACK_*symbolic ensures that Numeric->Memory is of size */
/* at least 3, so this initialization will always succeed. */
#ifndef NDEBUG
DEBUG2 (("init_memoryspace, all free (except one unit at head
")) ;
UMF_dump_memory (Numeric) ;
#endif
}
|