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
|
/* ========================================================================== */
/* === UMF_mem_init_memoryspace ============================================= */
/* ========================================================================== */
/* -------------------------------------------------------------------------- */
/* UMFPACK Version 4.1 (Apr. 30, 2003), Copyright (c) 2003 by Timothy A. */
/* Davis. All Rights Reserved. See ../README for License. */
/* email: davis@cise.ufl.edu CISE Department, Univ. of Florida. */
/* 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"\n", 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"\n", (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\n")) ;
UMF_dump_memory (Numeric) ;
#endif
}
|
