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 "xbt/misc.h"
  12
  13 #define MAXMIN_PRECISION 0.00001
  14 static XBT_INLINE void double_update(double *variable, double value)
  15 {
  16   *variable -= value;
  17   if(*variable< MAXMIN_PRECISION) *variable = 0.0;
  18 }
  19
  20 static XBT_INLINE int double_positive(double value)
  21 {
  22   return (value>MAXMIN_PRECISION);
  23 }
  24
  25 typedef struct lmm_variable *lmm_variable_t;
  26 typedef struct lmm_constraint *lmm_constraint_t;
  27 typedef struct lmm_system *lmm_system_t;
  28
  29 XBT_PUBLIC(lmm_system_t) lmm_system_new(void);
  30 XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
  31 void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);
  32
  33 XBT_PUBLIC(lmm_constraint_t) lmm_constraint_new(lmm_system_t sys, void *id,
  34                                     double bound_value);
  35 void lmm_constraint_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, int number_of_constraints);
  42 void lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
  43 XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
  44
  45 XBT_PUBLIC(void) lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
  46                 lmm_variable_t var, double value);
  47 void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
  48                     lmm_variable_t var, double value);
  49 void lmm_elem_set_value(lmm_system_t sys, lmm_constraint_t cnst,
  50                         lmm_variable_t var, double value);
  51
  52 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
  53                                        lmm_variable_t var, int num);
  54 int lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var);
  55 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
  56                                      lmm_constraint_t cnst,
  57                                      lmm_variable_t * var);
  58
  59 lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys);
  60 lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys, lmm_constraint_t cnst);
  61
  62 void *lmm_constraint_id(lmm_constraint_t cnst);
  63 void *lmm_variable_id(lmm_variable_t var);
  64
  65 void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
  66                 lmm_variable_t var, double value);
  67 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
  68                                double bound);
  69
  70
  71 XBT_PUBLIC(void) lmm_update_variable_latency(lmm_system_t sys, lmm_variable_t var,
  72                                  double delta);
  73
  74
  75
  76 XBT_PUBLIC(void) lmm_update_variable_weight(lmm_system_t sys, 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, lmm_constraint_t cnst,
  81                                  double bound);
  82
  83 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst);
  84
  85
  86 XBT_PUBLIC(void) lmm_solve(lmm_system_t sys);
  87
  88 #ifdef HAVE_SDP
  89 XBT_PUBLIC(void) sdp_solve(lmm_system_t sys);
  90 #endif /* HAVE_SDP */
  91
  92 XBT_PUBLIC(void) lagrange_solve(lmm_system_t sys);
  93 XBT_PUBLIC(void) bottleneck_solve(lmm_system_t sys);
  94
  95 /**
  96  * Default functions associated to the chosen protocol. When
  97  * using the lagrangian approach.
  98  */
  99
 100 XBT_PUBLIC(void) lmm_set_default_protocol_function(double (* func_f)  (lmm_variable_t var, double x),
 101                                        double (* func_fp) (lmm_variable_t var, double x),
 102                                        double (* func_fpi)(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_vegas_f)  (lmm_variable_t var, double x);
 109 XBT_PUBLIC(double func_vegas_fp) (lmm_variable_t var, double x);
 110 XBT_PUBLIC(double func_vegas_fpi)(lmm_variable_t var, double x);
 111
 112
 113 #endif                          /* _SURF_MAXMIN_H */