-/* Authors: Arnaud Legrand */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
+ * 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. */
#ifndef _SURF_MAXMIN_H
#define _SURF_MAXMIN_H
-typedef long double xbt_maxmin_float_t;
-#define XBT_MAXMIN_FLOAT_T "%Lg" /* for printing purposes */
+#include <math.h>
+#include "portable.h"
+#include "xbt/misc.h"
+#include "surf/datatypes.h"
-typedef struct lmm_variable *lmm_variable_t;
-typedef struct lmm_constraint *lmm_constraint_t;
-typedef struct lmm_system *lmm_system_t;
+extern double sg_maxmin_precision;
+#define MAXMIN_PRECISION sg_maxmin_precision
+static XBT_INLINE void double_update(double *variable, double value)
+{
+ *variable -= value;
+ if (*variable < MAXMIN_PRECISION)
+ *variable = 0.0;
+}
-lmm_system_t lmm_system_new(void);
-void lmm_system_free(lmm_system_t sys);
+static XBT_INLINE int double_positive(double value)
+{
+ return (value > MAXMIN_PRECISION);
+}
+
+static XBT_INLINE int double_equals(double value1, double value2)
+{
+ return (fabs(value1 - value2) < MAXMIN_PRECISION);
+}
+
+XBT_PUBLIC(lmm_system_t) lmm_system_new(int selective_update);
+XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
+void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);
+
+XBT_PUBLIC(lmm_constraint_t) lmm_constraint_new(lmm_system_t sys, void *id,
+ double bound_value);
+void lmm_constraint_shared(lmm_constraint_t cnst);
+int lmm_constraint_is_shared(lmm_constraint_t cnst);
-lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
- xbt_maxmin_float_t bound_value);
void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst);
-lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
- xbt_maxmin_float_t weight_value,
- xbt_maxmin_float_t bound,
- int number_of_constraints);
+XBT_PUBLIC(lmm_variable_t) lmm_variable_new(lmm_system_t sys, void *id,
+ double weight_value,
+ double bound,
+ int number_of_constraints);
void lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
-xbt_maxmin_float_t lmm_variable_getvalue(lmm_variable_t var);
+XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
+XBT_PUBLIC(double) lmm_variable_getbound(lmm_variable_t var);
+
+XBT_PUBLIC(void) lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
+ lmm_variable_t var, double value);
+void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
+ lmm_variable_t var, double value);
+void lmm_elem_set_value(lmm_system_t sys, lmm_constraint_t cnst,
+ lmm_variable_t var, double value);
+
+lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
+ lmm_variable_t var, int num);
+int lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var);
+lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
+ lmm_constraint_t cnst,
+ lmm_element_t * elem);
+lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys);
+lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys,
+ lmm_constraint_t cnst);
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+XBT_PUBLIC(int) lmm_is_variable_limited_by_latency(lmm_variable_t var);
+#endif
-void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, xbt_maxmin_float_t value);
+void *lmm_constraint_id(lmm_constraint_t cnst);
+void *lmm_variable_id(lmm_variable_t var);
void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, xbt_maxmin_float_t value);
-void lmm_update_variable_bound(lmm_variable_t var,
- xbt_maxmin_float_t bound);
-void lmm_update_variable_weight(lmm_variable_t var,
- xbt_maxmin_float_t weight);
-void lmm_update_constraint_bound(lmm_constraint_t cnst,
- xbt_maxmin_float_t bound);
-
-void lmm_solve(lmm_system_t sys);
-#endif /* _SURF_MAXMIN_H */
+ lmm_variable_t var, double value);
+void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
+ double bound);
+
+
+XBT_PUBLIC(void) lmm_update_variable_weight(lmm_system_t sys,
+ lmm_variable_t var,
+ double weight);
+double lmm_get_variable_weight(lmm_variable_t var);
+
+XBT_PUBLIC(void) lmm_update_constraint_bound(lmm_system_t sys,
+ lmm_constraint_t cnst,
+ double bound);
+
+int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst);
+
+
+XBT_PUBLIC(void) lmm_solve(lmm_system_t sys);
+
+XBT_PUBLIC(void) lagrange_solve(lmm_system_t sys);
+XBT_PUBLIC(void) bottleneck_solve(lmm_system_t sys);
+
+/**
+ * Default functions associated to the chosen protocol. When
+ * using the lagrangian approach.
+ */
+
+XBT_PUBLIC(void) lmm_set_default_protocol_function(double (*func_f)
+ (lmm_variable_t var,
+ double x),
+ double (*func_fp)
+ (lmm_variable_t var,
+ double x),
+ double (*func_fpi)
+ (lmm_variable_t var,
+ double x));
+
+XBT_PUBLIC(double func_reno_f) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_reno_fp) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_reno_fpi) (lmm_variable_t var, double x);
+
+XBT_PUBLIC(double func_reno2_f) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_reno2_fp) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_reno2_fpi) (lmm_variable_t var, double x);
+
+XBT_PUBLIC(double func_vegas_f) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_vegas_fp) (lmm_variable_t var, double x);
+XBT_PUBLIC(double func_vegas_fpi) (lmm_variable_t var, double x);
+
+
+#endif /* _SURF_MAXMIN_H */
