src/include/surf/maxmin.h

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #ifndef _SURF_MAXMIN_H
   9 #define _SURF_MAXMIN_H
  10
  11 #include "portable.h"
  12 #include "xbt/misc.h"
  13 #include "surf/datatypes.h"
  14
  15 #define MAXMIN_PRECISION 0.00001
  16 static XBT_INLINE void double_update(double *variable, double value)
  17 {
  18   *variable -= value;
  19   if (*variable < MAXMIN_PRECISION)
  20     *variable = 0.0;
  21 }
  22
  23 static XBT_INLINE int double_positive(double value)
  24 {
  25   return (value > MAXMIN_PRECISION);
  26 }
  27
  28 XBT_PUBLIC(lmm_system_t) lmm_system_new(void);
  29 XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
  30      void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);
  31
  32 XBT_PUBLIC(lmm_constraint_t) lmm_constraint_new(lmm_system_t sys, void *id,
  33                                                 double bound_value);
  34      void lmm_constraint_shared(lmm_constraint_t cnst);
  35      int lmm_constraint_is_shared(lmm_constraint_t cnst);
  36
  37      void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst);
  38
  39 XBT_PUBLIC(lmm_variable_t) lmm_variable_new(lmm_system_t sys, void *id,
  40                                             double weight_value,
  41                                             double bound,
  42                                             int number_of_constraints);
  43      void lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
  44 XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
  45 XBT_PUBLIC(double) lmm_variable_getbound(lmm_variable_t var);
  46
  47 XBT_PUBLIC(void) lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
  48                             lmm_variable_t var, double value);
  49      void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
  50                          lmm_variable_t var, double value);
  51      void lmm_elem_set_value(lmm_system_t sys, lmm_constraint_t cnst,
  52                              lmm_variable_t var, double value);
  53
  54      lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
  55                                             lmm_variable_t var, int num);
  56      int lmm_get_number_of_cnst_from_var(lmm_system_t sys,
  57                                          lmm_variable_t var);
  58      lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
  59                                           lmm_constraint_t cnst,
  60                                           lmm_element_t * elem);
  61
  62      lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys);
  63      lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys,
  64                                                      lmm_constraint_t cnst);
  65
  66      void *lmm_constraint_id(lmm_constraint_t cnst);
  67      void *lmm_variable_id(lmm_variable_t var);
  68
  69      void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
  70                      lmm_variable_t var, double value);
  71      void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
  72                                     double bound);
  73
  74
  75 XBT_PUBLIC(void) lmm_update_variable_weight(lmm_system_t sys,
  76                                             lmm_variable_t var,
  77                                             double weight);
  78      double lmm_get_variable_weight(lmm_variable_t var);
  79
  80 XBT_PUBLIC(void) lmm_update_constraint_bound(lmm_system_t sys,
  81                                              lmm_constraint_t cnst,
  82                                              double bound);
  83
  84      int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst);
  85
  86
  87 XBT_PUBLIC(void) lmm_solve(lmm_system_t sys);
  88
  89 XBT_PUBLIC(void) lagrange_solve(lmm_system_t sys);
  90 XBT_PUBLIC(void) bottleneck_solve(lmm_system_t sys);
  91
  92 /**
  93  * Default functions associated to the chosen protocol. When
  94  * using the lagrangian approach.
  95  */
  96
  97 XBT_PUBLIC(void) lmm_set_default_protocol_function(double (*func_f)
  98                                                    (lmm_variable_t var, double x),
  99                                                    double (*func_fp)
 100                                                    (lmm_variable_t var, double x),
 101                                                    double (*func_fpi)
 102                                                    (lmm_variable_t var, double x));
 103
 104 XBT_PUBLIC(double func_reno_f) (lmm_variable_t var, double x);
 105 XBT_PUBLIC(double func_reno_fp) (lmm_variable_t var, double x);
 106 XBT_PUBLIC(double func_reno_fpi) (lmm_variable_t var, double x);
 107
 108 XBT_PUBLIC(double func_reno2_f) (lmm_variable_t var, double x);
 109 XBT_PUBLIC(double func_reno2_fp) (lmm_variable_t var, double x);
 110 XBT_PUBLIC(double func_reno2_fpi) (lmm_variable_t var, double x);
 111
 112 XBT_PUBLIC(double func_vegas_f) (lmm_variable_t var, double x);
 113 XBT_PUBLIC(double func_vegas_fp) (lmm_variable_t var, double x);
 114 XBT_PUBLIC(double func_vegas_fpi) (lmm_variable_t var, double x);
 115
 116
 117 #endif /* _SURF_MAXMIN_H */