-/* Authors: Arnaud Legrand */
+/* $Id$ */
+
+/* Copyright (c) 2004 Arnaud Legrand. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
- under the terms of the license (GNU LGPL) which comes with this package. */
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include "xbt/sysdep.h"
#include "xbt/error.h"
#include "maxmin_private.h"
#include <stdlib.h>
-
-extern lmm_system_t Sys;
-extern lmm_constraint_t L1;
-extern lmm_constraint_t L2;
-extern lmm_constraint_t L3;
-
-extern lmm_variable_t R_1_2_3;
-extern lmm_variable_t R_1;
-extern lmm_variable_t R_2;
-extern lmm_variable_t R_3;
-
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(maxmin, surf,
+ "Logging specific to the SURF maxmin module");
lmm_system_t lmm_system_new(void)
{
l = xbt_new0(s_lmm_system_t, 1);
+ l->modified = 0;
xbt_swag_init(&(l->variable_set),
xbt_swag_offset(var, variable_set_hookup));
xbt_swag_init(&(l->constraint_set),
xbt_free(sys);
}
-static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
+void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var)
{
int i;
lmm_element_t elem = NULL;
+ sys->modified = 1;
+
for (i = 0; i < var->cnsts_number; i++) {
elem = &var->cnsts[i];
- xbt_swag_extract(elem, &(elem->constraint->element_set));
- if (xbt_swag_size(&(elem->constraint->element_set)))
+ xbt_swag_remove(elem, &(elem->constraint->element_set));
+ if (!xbt_swag_size(&(elem->constraint->element_set)))
make_constraint_inactive(sys, elem->constraint);
}
+ var->cnsts_number = 0;
+}
+
+static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
+{
+
+ lmm_variable_disable(sys, var);
+
xbt_free(var->cnsts);
xbt_free(var);
}
static void lmm_cnst_free(lmm_system_t sys, lmm_constraint_t cnst)
{
-/* xbt_assert0(xbt_fifo_size(&(cnst->row)), */
-/* "This list should be empty!"); */
+/* xbt_assert0(xbt_swag_size(&(cnst->element_set)), */
+/* "This list should be empty!"); */
remove_active_constraint(sys, cnst);
xbt_free(cnst);
}
lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
- FLOAT bound_value)
+ double bound_value)
{
lmm_constraint_t cnst = NULL;
s_lmm_element_t elem;
cnst = xbt_new0(s_lmm_constraint_t, 1);
-/* cnst->id = id; */
+ cnst->id = id;
xbt_swag_init(&(cnst->element_set),
xbt_swag_offset(elem, element_set_hookup));
xbt_swag_init(&(cnst->active_element_set),
cnst->usage = 0;
insert_constraint(sys, cnst);
- cnst->id = id;
-
return cnst;
}
}
lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
- FLOAT weight, FLOAT bound,
- int number_of_constraints)
+ double weight,
+ double bound, int number_of_constraints)
{
lmm_variable_t var = NULL;
var = xbt_new0(s_lmm_variable_t, 1);
-/* var->id = id; */
+ var->id = id;
var->cnsts = xbt_new0(s_lmm_element_t, number_of_constraints);
var->cnsts_size = number_of_constraints;
/* var->cnsts_number = 0; *//* Useless because of the calloc */
var->weight = weight;
var->bound = bound;
- var->value = -1;
- insert_variable(sys, var);
-
- var->id=id;
+ var->value = 0.0;
+ if(weight) xbt_swag_insert_at_head(var,&(sys->variable_set));
+ else xbt_swag_insert_at_tail(var,&(sys->variable_set));
return var;
}
lmm_var_free(sys, var);
}
-FLOAT lmm_variable_getvalue(lmm_variable_t var)
+double lmm_variable_getvalue(lmm_variable_t var)
{
- return(var->value);
+ return (var->value);
}
void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, FLOAT value)
+ lmm_variable_t var, double value)
{
lmm_element_t elem = NULL;
- if (var->cnsts_number >= var->cnsts_size)
- abort();
+ sys->modified = 1;
+
+ xbt_assert0(var->cnsts_number < var->cnsts_size,
+ "Too much constraints");
elem = &(var->cnsts[var->cnsts_number++]);
elem->constraint = cnst;
elem->variable = var;
- insert_elem_in_constraint(elem);
+ if(var->weight) xbt_swag_insert_at_head(elem,&(elem->constraint->element_set));
+ else xbt_swag_insert_at_tail(elem,&(elem->constraint->element_set));
make_constraint_active(sys, cnst);
}
-static void saturated_constraints_update(lmm_system_t sys,
- lmm_constraint_t cnst,
- FLOAT * min_usage)
+lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
+ lmm_variable_t var, int num)
{
- lmm_constraint_t useless_cnst=NULL;
+ if (num < var->cnsts_number)
+ return (var->cnsts[num].constraint);
+ else
+ return NULL;
+}
- if(cnst->remaining<=0) return;
- if ((*min_usage < 0) || (*min_usage > cnst->remaining / cnst->usage)) {
- xbt_swag_t active_elem_list = &(cnst->active_element_set);
+int lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var)
+{
+ return (var->cnsts_number);
+}
+
+lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
+ lmm_constraint_t cnst,
+ lmm_variable_t * var)
+{
+ if (!(*var))
+ xbt_swag_getFirst(&(cnst->element_set));
+ else
+ *var = xbt_swag_getNext(*var, cnst->element_set.offset);
+ return *var;
+}
+
+void *lmm_constraint_id(lmm_constraint_t cnst)
+{
+ return cnst->id;
+}
+
+void *lmm_variable_id(lmm_variable_t var)
+{
+ return var->id;
+}
+
+static void saturated_constraint_set_update(lmm_system_t sys,
+ lmm_constraint_t cnst,
+ double *min_usage)
+{
+ lmm_constraint_t useless_cnst = NULL;
+ if (cnst->usage <= 0)
+ return;
+ if (cnst->remaining <= 0)
+ return;
+ if ((*min_usage < 0) || (*min_usage > cnst->remaining / cnst->usage)) {
*min_usage = cnst->remaining / cnst->usage;
- while (xbt_swag_extract
- (useless_cnst, &(sys->saturated_constraint_set))) {
- }
+ while ((useless_cnst =
+ xbt_swag_getFirst(&(sys->saturated_constraint_set))))
+ xbt_swag_remove(useless_cnst, &(sys->saturated_constraint_set));
+
xbt_swag_insert(cnst, &(sys->saturated_constraint_set));
} else if (*min_usage == cnst->remaining / cnst->usage) {
xbt_swag_insert(cnst, &(sys->saturated_constraint_set));
}
}
-static void saturated_variables_update(lmm_system_t sys)
+static void saturated_variable_set_update(lmm_system_t sys)
{
lmm_constraint_t cnst = NULL;
xbt_swag_t cnst_list = NULL;
xbt_swag_t elem_list = NULL;
cnst_list = &(sys->saturated_constraint_set);
- while((cnst=xbt_swag_getFirst(cnst_list))) {
-/* xbt_swag_foreach(cnst, cnst_list) { */
+ while ((cnst = xbt_swag_getFirst(cnst_list))) {
elem_list = &(cnst->active_element_set);
- xbt_swag_foreach(elem, elem_list)
+ xbt_swag_foreach(elem, elem_list) {
+ if(elem->variable->weight<=0) break;
+ if ((elem->value > 0))
xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
- xbt_swag_extract(cnst,cnst_list);
+ }
+ xbt_swag_remove(cnst, cnst_list);
}
}
xbt_swag_t cnst_list = NULL;
xbt_swag_t var_list = NULL;
xbt_swag_t elem_list = NULL;
- FLOAT min_usage = -1;
+ double min_usage = -1;
+
+ if (!(sys->modified))
+ return;
/* Init */
- var_list=&(sys->variable_set);
+ var_list = &(sys->variable_set);
xbt_swag_foreach(var, var_list) {
- var->value = -1;
+ var->value = 0.0;
}
cnst->remaining = cnst->bound;
cnst->usage = 0;
xbt_swag_foreach(elem, elem_list) {
- cnst->usage += elem->value / elem->variable->weight;
- insert_active_elem_in_constraint(elem);
+ if(elem->variable->weight <=0) break;
+ if ((elem->value > 0)) {
+ cnst->usage += elem->value / elem->variable->weight;
+ insert_active_elem_in_constraint(elem);
+ }
}
/* Saturated constraints update */
- saturated_constraints_update(sys, cnst, &min_usage);
+ saturated_constraint_set_update(sys, cnst, &min_usage);
}
- saturated_variables_update(sys);
+ saturated_variable_set_update(sys);
/* Saturated variables update */
do {
/* Fix the variables that have to be */
- var_list=&(sys->saturated_variable_set);
+ var_list = &(sys->saturated_variable_set);
xbt_swag_foreach(var, var_list) {
/* First check if some of these variables have reach their upper
- bound and update min_usage accordingly. */
- if((var->bound>0) && (var->bound / var->weight < min_usage)) {
+ bound and update min_usage accordingly. */
+ if ((var->bound > 0) && (var->bound / var->weight < min_usage)) {
min_usage = var->bound / var->weight;
}
}
- while((var=xbt_swag_getFirst(var_list))) {
- int i ;
+ while ((var = xbt_swag_getFirst(var_list))) {
+ int i;
var->value = min_usage / var->weight;
-
+
/* Update usage */
for (i = 0; i < var->cnsts_number; i++) {
cnst->usage -= elem->value / var->weight;
remove_active_elem_in_constraint(elem);
}
- xbt_swag_extract(var,var_list);
+ xbt_swag_remove(var, var_list);
}
-
+
/* Find out which variables reach the maximum */
cnst_list = &(sys->active_constraint_set);
min_usage = -1;
xbt_swag_foreach(cnst, cnst_list) {
- saturated_constraints_update(sys, cnst, &min_usage);
+ saturated_constraint_set_update(sys, cnst, &min_usage);
}
- saturated_variables_update(sys);
+ saturated_variable_set_update(sys);
} while (xbt_swag_size(&(sys->saturated_variable_set)));
+
+ sys->modified = 0;
}
/* Not a O(1) function */
void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, FLOAT value)
+ lmm_variable_t var, double value)
{
int i;
- lmm_element_t elem = NULL;
+ sys->modified = 1;
for (i = 0; i < var->cnsts_number; i++)
- if(var->cnsts[i].constraint==cnst) {
- elem->value =value;
+ if (var->cnsts[i].constraint == cnst) {
+ var->cnsts[i].value = value;
return;
}
}
-void lmm_update_variable_bound(lmm_variable_t var, FLOAT bound)
+void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
+ double bound)
{
- var->bound=bound;
+ sys->modified = 1;
+ var->bound = bound;
+}
+
+void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var,
+ double weight)
+{
+ sys->modified = 1;
+ var->weight = weight;
+ xbt_swag_remove(var,&(sys->variable_set));
+ if(weight) xbt_swag_insert_at_head(var,&(sys->variable_set));
+ else xbt_swag_insert_at_tail(var,&(sys->variable_set));
+}
+
+
+double lmm_get_variable_weight(lmm_variable_t var)
+
+{
+ return var->weight;
}
-void lmm_update_variable_weight(lmm_variable_t var, FLOAT weight)
+void lmm_update_constraint_bound(lmm_system_t sys, lmm_constraint_t cnst,
+ double bound)
{
- var->weight=weight;
+ sys->modified = 1;
+ cnst->bound = bound;
}
-void lmm_update_constraint_bound(lmm_constraint_t cnst,
- FLOAT bound)
+int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
{
- cnst->bound=bound;
+ return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
}
+lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys)
+{
+ return xbt_swag_getFirst(&(sys->active_constraint_set));
+}
+
+lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys, lmm_constraint_t cnst)
+{
+ return xbt_swag_getNext(cnst,(sys->active_constraint_set).offset);
+}
/* void lmm_print(lmm_system_t sys) */
