#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;
+
+
lmm_system_t lmm_system_new(void)
{
lmm_system_t l = NULL;
xbt_swag_init(&(l->constraint_set),
xbt_swag_offset(cnst, constraint_set_hookup));
+ xbt_swag_init(&(l->active_constraint_set),
+ xbt_swag_offset(cnst, active_constraint_set_hookup));
+
+ xbt_swag_init(&(l->saturated_variable_set),
+ xbt_swag_offset(var, saturated_variable_set_hookup));
+ xbt_swag_init(&(l->saturated_constraint_set),
+ xbt_swag_offset(cnst, saturated_constraint_set_hookup));
+
return l;
}
lmm_constraint_t cnst = NULL;
while ((var = extract_variable(sys)))
- lmm_var_free(var);
+ lmm_var_free(sys, var);
while ((cnst = extract_constraint(sys)))
- lmm_cnst_free(cnst);
+ lmm_cnst_free(sys, cnst);
xbt_free(sys);
}
-static void lmm_var_free(lmm_variable_t var)
+static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
{
int i;
lmm_element_t elem = NULL;
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)))
+ make_constraint_inactive(sys, elem->constraint);
}
xbt_free(var->cnsts);
xbt_free(var);
}
-static void lmm_cnst_free(lmm_constraint_t cnst)
+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!"); */
+ remove_active_constraint(sys, cnst);
xbt_free(cnst);
}
-lmm_constraint_t lmm_constraint_new(lmm_system_t sys, /* void *id, */
+lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
FLOAT bound_value)
{
lmm_constraint_t cnst = NULL;
/* cnst->id = id; */
xbt_swag_init(&(cnst->element_set),
xbt_swag_offset(elem, element_set_hookup));
+ xbt_swag_init(&(cnst->active_element_set),
+ xbt_swag_offset(elem, active_element_set_hookup));
cnst->bound = bound_value;
- cnst->usage = UNUSED_CONSTRAINT;
+ cnst->usage = 0;
insert_constraint(sys, cnst);
+ cnst->id = id;
+
return cnst;
}
void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst)
{
remove_constraint(sys, cnst);
- lmm_cnst_free(cnst);
+ lmm_cnst_free(sys, cnst);
}
-lmm_variable_t lmm_variable_new(lmm_system_t sys, /* void *id, */
- FLOAT weight_value, FLOAT bound,
+lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
+ FLOAT weight, FLOAT bound,
int number_of_constraints)
{
lmm_variable_t var = NULL;
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_value = weight_value;
+ var->weight = weight;
var->bound = bound;
var->value = -1;
insert_variable(sys, var);
+ var->id=id;
+
return var;
}
void lmm_variable_free(lmm_system_t sys, lmm_variable_t var)
{
remove_variable(sys, var);
- lmm_var_free(var);
+ lmm_var_free(sys, var);
}
-void lmm_add_constraint(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, FLOAT value)
+FLOAT lmm_variable_getvalue(lmm_variable_t var)
+{
+ return(var->value);
+}
+
+void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
+ lmm_variable_t var, FLOAT value)
{
lmm_element_t elem = NULL;
-/* xbt_assert0(var->cnsts_number<var->cnsts_size,"Too much constraint"); */
+ if (var->cnsts_number >= var->cnsts_size)
+ abort();
elem = &(var->cnsts[var->cnsts_number++]);
elem->value = value;
elem->constraint = cnst;
+ elem->variable = var;
insert_elem_in_constraint(elem);
+ make_constraint_active(sys, cnst);
+}
+
+static void saturated_constraints_update(lmm_system_t sys,
+ lmm_constraint_t cnst,
+ FLOAT * min_usage)
+{
+ lmm_constraint_t useless_cnst=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);
+
+ *min_usage = cnst->remaining / cnst->usage;
+
+ while (xbt_swag_extract
+ (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)
+{
+ lmm_constraint_t cnst = NULL;
+ xbt_swag_t cnst_list = NULL;
+ lmm_element_t elem = 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) { */
+ elem_list = &(cnst->active_element_set);
+ xbt_swag_foreach(elem, elem_list)
+ xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
+ xbt_swag_extract(cnst,cnst_list);
+ }
+
}
void lmm_solve(lmm_system_t sys)
{
- void **id_table = NULL;
+ lmm_variable_t var = NULL;
+ lmm_constraint_t cnst = NULL;
+ lmm_element_t elem = NULL;
+ xbt_swag_t cnst_list = NULL;
+ xbt_swag_t var_list = NULL;
+ xbt_swag_t elem_list = NULL;
+ FLOAT min_usage = -1;
+
+ /* Init */
+ var_list=&(sys->variable_set);
+ xbt_swag_foreach(var, var_list) {
+ var->value = -1;
+ }
+
/* Compute Usage and store the variables that reach the maximum */
+ cnst_list = &(sys->active_constraint_set);
+ xbt_swag_foreach(cnst, cnst_list) {
+ /* INIT */
+ elem_list = &(cnst->element_set);
+ 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);
+ }
+
+ /* Saturated constraints update */
+ saturated_constraints_update(sys, cnst, &min_usage);
+ }
+
+ saturated_variables_update(sys);
+
+ /* Saturated variables update */
+
do {
/* Fix the variables that have to be */
+ 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)) {
+ min_usage = var->bound / var->weight;
+ }
+ }
+
+
+ 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++) {
+ elem = &var->cnsts[i];
+ cnst = elem->constraint;
+ cnst->remaining -= elem->value * var->value;
+ cnst->usage -= elem->value / var->weight;
+ remove_active_elem_in_constraint(elem);
+ }
+ xbt_swag_extract(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_variables_update(sys);
+
+ } while (xbt_swag_size(&(sys->saturated_variable_set)));
+}
- /* Update Usage and store the variables that reach the maximum */
+/* Not a O(1) function */
- } while (1);
+void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
+ lmm_variable_t var, FLOAT value)
+{
+ int i;
+ lmm_element_t elem = NULL;
+ for (i = 0; i < var->cnsts_number; i++)
+ if(var->cnsts[i].constraint==cnst) {
+ elem->value =value;
+ return;
+ }
}
+
+void lmm_update_variable_bound(lmm_variable_t var, FLOAT bound)
+{
+ var->bound=bound;
+}
+
+void lmm_update_variable_weight(lmm_variable_t var, FLOAT weight)
+{
+ var->weight=weight;
+}
+
+void lmm_update_constraint_bound(lmm_constraint_t cnst,
+ FLOAT bound)
+{
+ cnst->bound=bound;
+}
+
+
+
+/* void lmm_print(lmm_system_t sys) */
+/* { */
+/* lmm_variable_t var = NULL; */
+/* lmm_constraint_t cnst = NULL; */
+/* lmm_element_t elem = NULL; */
+/* xbt_swag_t cnst_list = NULL; */
+/* xbt_swag_t var_list = NULL; */
+/* xbt_swag_t elem_list = NULL; */
+
+/* var_list = &(sys->variable_set); */
+/* xbt_swag_foreach(var, var_list) { */
+/* printf("%s : {\n",var->id); */
+/* printf("\t %s : {\n",var->id); */
+/* } */
+/* } */
#include "xbt/swag.h"
typedef struct lmm_element {
+ /* hookup to constraint */
s_xbt_swag_hookup_t element_set_hookup;
+ s_xbt_swag_hookup_t active_element_set_hookup;
+
lmm_constraint_t constraint;
- FLOAT value;
+ lmm_variable_t variable;
+ FLOAT value;
} s_lmm_element_t, *lmm_element_t;
#define insert_elem_in_constraint(elem) xbt_swag_insert(elem,&(elem->constraint->element_set))
+#define insert_active_elem_in_constraint(elem) xbt_swag_insert(elem,&(elem->constraint->active_element_set))
+#define remove_active_elem_in_constraint(elem) xbt_swag_extract(elem,&(elem->constraint->active_element_set))
typedef struct lmm_constraint {
+ /* hookup to system */
s_xbt_swag_hookup_t constraint_set_hookup;
- /* void *id; */
+ s_xbt_swag_hookup_t active_constraint_set_hookup;
+ s_xbt_swag_hookup_t saturated_constraint_set_hookup;
+
s_xbt_swag_t element_set; /* a list of lmm_mat_element_t */
+ s_xbt_swag_t active_element_set; /* a list of lmm_mat_element_t */
FLOAT bound;
+ FLOAT remaining;
FLOAT usage;
+ char *id;
} s_lmm_constraint_t;
typedef struct lmm_variable {
+ /* hookup to system */
s_xbt_swag_hookup_t variable_set_hookup;
- /* void *id; */
+ s_xbt_swag_hookup_t saturated_variable_set_hookup;
+
s_lmm_element_t *cnsts;
int cnsts_size;
int cnsts_number;
- FLOAT weight_value;
+ FLOAT weight;
FLOAT bound;
FLOAT value;
+ char *id;
} s_lmm_variable_t;
typedef struct lmm_system {
s_xbt_swag_t constraint_set; /* a list of lmm_constraint_t */
s_xbt_swag_t active_constraint_set; /* a list of lmm_constraint_t */
+
+ s_xbt_swag_t saturated_variable_set; /* a list of lmm_variable_t */
+ s_xbt_swag_t saturated_constraint_set;/* a list of lmm_constraint_t_t */
} s_lmm_system_t;
#define extract_variable(sys) xbt_swag_extract(xbt_swag_getFirst(&(sys->variable_set)),&(sys->variable_set))
#define extract_constraint(sys) xbt_swag_extract(xbt_swag_getFirst(&(sys->constraint_set)),&(sys->constraint_set))
#define insert_variable(sys,var) xbt_swag_insert(var,&(sys->variable_set))
#define insert_constraint(sys,cnst) xbt_swag_insert(cnst,&(sys->constraint_set))
-#define remove_variable(sys,var) xbt_swag_extract(var,&(sys->variable_set))
-#define remove_constraint(sys,cnst) xbt_swag_extract(cnst,&(sys->constraint_set))
+#define remove_variable(sys,var) do {xbt_swag_extract(var,&(sys->variable_set));\
+ xbt_swag_extract(var,&(sys->saturated_variable_set));} while(0)
+#define remove_constraint(sys,cnst) do {xbt_swag_extract(cnst,&(sys->constraint_set));\
+ xbt_swag_extract(cnst,&(sys->saturated_constraint_set));} while(0)
+#define remove_active_constraint(sys,cnst) xbt_swag_extract(cnst,&(sys->active_constraint_set))
+#define make_constraint_active(sys,cnst) xbt_swag_insert(cnst,&(sys->active_constraint_set))
+#define make_constraint_inactive(sys,cnst) remove_active_constraint(sys,cnst)
-static void lmm_var_free(lmm_variable_t e);
-static void lmm_cnst_free(lmm_constraint_t cnst);
+static void lmm_var_free(lmm_system_t sys, lmm_variable_t var);
+static void lmm_cnst_free(lmm_system_t sys, lmm_constraint_t cnst);
/* #define UNDEFINED_VALUE -1.0 */
#define UNUSED_CONSTRAINT -2.0
/* */
/* ______ */
-/* ==l1== l2 ==l3== */
+/* ==l1== L2 ==L3== */
/* ------ */
/* */
+ lmm_system_t Sys = NULL ;
+ lmm_constraint_t L1 = NULL;
+ lmm_constraint_t L2 = NULL;
+ lmm_constraint_t L3 = NULL;
+
+ lmm_variable_t R_1_2_3 = NULL;
+ lmm_variable_t R_1 = NULL;
+ lmm_variable_t R_2 = NULL;
+ lmm_variable_t R_3 = NULL;
+
void test(void);
void test(void)
{
- lmm_system_t sys = NULL ;
- lmm_constraint_t l1 = NULL;
- lmm_constraint_t l2 = NULL;
- lmm_constraint_t l3 = NULL;
- lmm_variable_t r_1_2_3 = NULL;
- lmm_variable_t r_1 = NULL;
- lmm_variable_t r_2 = NULL;
- lmm_variable_t r_3 = NULL;
+ Sys = lmm_system_new();
+ L1 = lmm_constraint_new(Sys, (void *) "L1", 1.0);
+ L2 = lmm_constraint_new(Sys, (void *) "L2", 10.0);
+ L3 = lmm_constraint_new(Sys, (void *) "L3", 1.0);
+
+ R_1_2_3 = lmm_variable_new(Sys, (void *) "R 1->2->3", 1.0 , -1.0 , 3);
+ R_1 = lmm_variable_new(Sys, (void *) "R 1", 1.0 , -1.0 , 1);
+ R_2 = lmm_variable_new(Sys, (void *) "R 2", 1.0 , -1.0 , 1);
+ R_3 = lmm_variable_new(Sys, (void *) "R 3", 1.0 , -1.0 , 1);
+
+ lmm_expand(Sys, L1, R_1_2_3, 1.0);
+ lmm_expand(Sys, L2, R_1_2_3, 1.0);
+ lmm_expand(Sys, L3, R_1_2_3, 1.0);
+
+ lmm_expand(Sys, L1, R_1, 1.0);
+ lmm_expand(Sys, L2, R_2, 1.0);
+ lmm_expand(Sys, L3, R_3, 1.0);
- sys = lmm_system_new();
- l1 = lmm_constraint_new(sys, /* (void *) "L1", */ 1.0);
- l2 = lmm_constraint_new(sys, /* (void *) "L2", */ 10.0);
- l3 = lmm_constraint_new(sys, /* (void *) "L3", */ 1.0);
+#define AFFICHE(var) printf(#var " = %Lg\n",lmm_variable_getvalue(var));
+ AFFICHE(R_1_2_3);
+ AFFICHE(R_1);
+ AFFICHE(R_2);
+ AFFICHE(R_3);
- r_1_2_3 = lmm_variable_new(sys, /* (void *) "R 1->2->3", */ 1.0 , 1.0 , 3);
- r_1 = lmm_variable_new(sys, /* (void *) "R 1", */ 1.0 , 1.0 , 1);
- r_2 = lmm_variable_new(sys, /* (void *) "R 2", */ 1.0 , 1.0 , 1);
- r_3 = lmm_variable_new(sys, /* (void *) "R 3", */ 1.0 , 1.0 , 1);
+ printf("\n");
+ lmm_solve(Sys);
- lmm_add_constraint(sys, l1, r_1_2_3, 1.0);
- lmm_add_constraint(sys, l2, r_1_2_3, 1.0);
- lmm_add_constraint(sys, l3, r_1_2_3, 1.0);
+ AFFICHE(R_1_2_3);
+ AFFICHE(R_1);
+ AFFICHE(R_2);
+ AFFICHE(R_3);
+ printf("\n");
- lmm_add_constraint(sys, l1, r_1, 1.0);
- lmm_add_constraint(sys, l2, r_2, 1.0);
+ lmm_update_variable_weight(R_1_2_3,.5);
+ lmm_solve(Sys);
- lmm_add_constraint(sys, l3, r_3, 1.0);
+ AFFICHE(R_1_2_3);
+ AFFICHE(R_1);
+ AFFICHE(R_2);
+ AFFICHE(R_3);
+#undef AFFICHE
- lmm_system_free(sys);
+ lmm_system_free(Sys);
}
