/[escript]/trunk/paso/src/SystemMatrixPattern.c
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Contents of /trunk/paso/src/SystemMatrixPattern.c

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Revision 425 - (show annotations)
Tue Jan 10 04:10:39 2006 UTC (14 years, 1 month ago) by gross
File MIME type: text/plain
File size: 4123 byte(s)
The sparse solver can be called by paso now. 

the building has been change to reduce some code redundancy:
now all scons SCscripts are importing scons/esys_options.py which
imports platform specific settings. 



1 /* $Id$ */
2
3 /**************************************************************/
4
5 /* Paso: SystemMatrixPatternPattern */
6
7 /**************************************************************/
8
9 /* Copyrights by ACcESS Australia 2003, 2004,2005 */
10 /* Author: gross@access.edu.au */
11
12 /**************************************************************/
13
14 #include "Paso.h"
15 #include "SystemMatrixPattern.h"
16
17 /**************************************************************/
18
19 /* allocates a SystemMatrixPattern */
20
21 Paso_SystemMatrixPattern* Paso_SystemMatrixPattern_alloc(int type, int n_ptr, index_t* ptr,index_t* index) {
22 Paso_SystemMatrixPattern*out;
23 index_t index_offset=(type & PATTERN_FORMAT_OFFSET1 ? 1:0);
24 index_t loc_min_index,loc_max_index,min_index=index_offset,max_index=index_offset-1;
25 dim_t i;
26 Paso_resetError();
27
28 if (type & PATTERN_FORMAT_SYM) {
29 Paso_setError(TYPE_ERROR,"symmetric matrix pattern is not supported yet");
30 return NULL;
31 }
32 #pragma omp parallel private(loc_min_index,loc_max_index,i)
33 {
34 loc_min_index=index_offset;
35 loc_max_index=index_offset-1;
36 if (type & PATTERN_FORMAT_OFFSET1) {
37 #pragma omp for schedule(static)
38 for (i=0;i<n_ptr;++i) {
39 if (ptr[i]<ptr[i+1]) {
40 qsort(&(index[ptr[i]-1]),(size_t)(ptr[i+1]-ptr[i]),sizeof(index_t),Paso_comparIndex);
41 loc_min_index=MIN(loc_min_index,index[ptr[i]-1]);
42 loc_max_index=MAX(loc_max_index,index[ptr[i+1]-2]);
43 }
44 }
45 } else {
46 #pragma omp for schedule(static)
47 for (i=0;i<n_ptr;++i) {
48 if (ptr[i]<ptr[i+1]) {
49 qsort(&(index[ptr[i]]),(size_t)(ptr[i+1]-ptr[i]),sizeof(index_t),Paso_comparIndex);
50 loc_min_index=MIN(loc_min_index,index[ptr[i]]);
51 loc_max_index=MAX(loc_max_index,index[ptr[i+1]-1]);
52 }
53 }
54 }
55 #pragma omp critical
56 {
57 min_index=MIN(loc_min_index,min_index);
58 max_index=MAX(loc_max_index,max_index);
59 }
60 }
61 if (min_index<index_offset) {
62 Paso_setError(TYPE_ERROR,"Matrix pattern index out of range.");
63 return NULL;
64 }
65
66 out=MEMALLOC(1,Paso_SystemMatrixPattern);
67 if (Paso_checkPtr(out)) return NULL;
68 out->n_ptr=n_ptr;
69 out->n_index=max_index-index_offset+1;
70 out->ptr=ptr;
71 out->index=index;
72 out->len=out->ptr[out->n_ptr]-index_offset;
73 out->reference_counter=1;
74 out->type=type;
75 #ifdef Paso_TRACE
76 printf("Paso_SystemMatrixPattern_dealloc: system matrix pattern as been allocated.\n");
77 #endif
78 return out;
79 }
80
81 /* returns a reference to in */
82
83 Paso_SystemMatrixPattern* Paso_SystemMatrixPattern_reference(Paso_SystemMatrixPattern* in) {
84 if (in!=NULL) {
85 ++(in->reference_counter);
86 }
87 return in;
88 }
89
90 /* deallocates a SystemMatrixPattern: */
91
92 void Paso_SystemMatrixPattern_dealloc(Paso_SystemMatrixPattern* in) {
93 if (in!=NULL) {
94 in->reference_counter--;
95 if (in->reference_counter<=0) {
96 MEMFREE(in->ptr);
97 MEMFREE(in->index);
98 MEMFREE(in);
99 #ifdef Paso_TRACE
100 printf("Paso_SystemMatrixPattern_dealloc: system matrix pattern as been deallocated.\n");
101 #endif
102 }
103 }
104 }
105 /* *************************************************************/
106
107 /* some routines which help to get the matrix pattern from elements: */
108
109 /* this routine is used by qsort called in Paso_SystemMatrixPattern_alloc */
110
111 int Paso_comparIndex(const void *index1,const void *index2){
112 index_t Iindex1,Iindex2;
113 Iindex1=*(index_t*)index1;
114 Iindex2=*(index_t*)index2;
115 if (Iindex1<Iindex2) {
116 return -1;
117 } else {
118 if (Iindex1>Iindex2) {
119 return 1;
120 } else {
121 return 0;
122 }
123 }
124 }
125 /*
126 * $Log$
127 * Revision 1.2 2005/09/15 03:44:38 jgs
128 * Merge of development branch dev-02 back to main trunk on 2005-09-15
129 *
130 * Revision 1.1.2.1 2005/09/05 06:29:47 gross
131 * These files have been extracted from finley to define a stand alone libray for iterative
132 * linear solvers on the ALTIX. main entry through Paso_solve. this version compiles but
133 * has not been tested yet.
134 *
135 *
136 */

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