src/include/surf/maxmin.h

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #ifndef _SURF_MAXMIN_H
   8 #define _SURF_MAXMIN_H
   9
  10 #include <math.h>
  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 static XBT_INLINE int double_equals(double value1, double value2)
  29 {
  30   return (fabs(value1 - value2) < MAXMIN_PRECISION);
  31 }
  32
  33 XBT_PUBLIC(lmm_system_t) lmm_system_new(void);
  34 XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
  35 void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var);
  36
  37 XBT_PUBLIC(lmm_constraint_t) lmm_constraint_new(lmm_system_t sys, void *id,
  38                                                 double bound_value);
  39 void lmm_constraint_shared(lmm_constraint_t cnst);
  40 int lmm_constraint_is_shared(lmm_constraint_t cnst);
  41
  42 void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst);
  43
  44 XBT_PUBLIC(lmm_variable_t) lmm_variable_new(lmm_system_t sys, void *id,
  45                                             double weight_value,
  46                                             double bound,
  47                                             int number_of_constraints);
  48 void lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
  49 XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
  50 XBT_PUBLIC(double) lmm_variable_getbound(lmm_variable_t var);
  51
  52 XBT_PUBLIC(void) lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
  53                             lmm_variable_t var, double value);
  54 void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
  55                     lmm_variable_t var, double value);
  56 void lmm_elem_set_value(lmm_system_t sys, lmm_constraint_t cnst,
  57                         lmm_variable_t var, double value);
  58
  59 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
  60                                        lmm_variable_t var, int num);
  61 int lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var);
  62 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
  63                                      lmm_constraint_t cnst,
  64                                      lmm_element_t * elem);
  65
  66 lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys);
  67 lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys,
  68                                                 lmm_constraint_t cnst);
  69 #ifdef HAVE_LATENCY_BOUND_TRACKING
  70 XBT_PUBLIC(int) lmm_is_variable_limited_by_latency(lmm_variable_t var);
  71 #endif
  72
  73 void *lmm_constraint_id(lmm_constraint_t cnst);
  74 void *lmm_variable_id(lmm_variable_t var);
  75
  76 void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
  77                 lmm_variable_t var, double value);
  78 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
  79                                double bound);
  80
  81
  82 XBT_PUBLIC(void) lmm_update_variable_weight(lmm_system_t sys,
  83                                             lmm_variable_t var,
  84                                             double weight);
  85 double lmm_get_variable_weight(lmm_variable_t var);
  86
  87 XBT_PUBLIC(void) lmm_update_constraint_bound(lmm_system_t sys,
  88                                              lmm_constraint_t cnst,
  89                                              double bound);
  90
  91 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst);
  92
  93
  94 XBT_PUBLIC(void) lmm_solve(lmm_system_t sys);
  95
  96 XBT_PUBLIC(void) lagrange_solve(lmm_system_t sys);
  97 XBT_PUBLIC(void) bottleneck_solve(lmm_system_t sys);
  98
  99 /**
 100  * Default functions associated to the chosen protocol. When
 101  * using the lagrangian approach.
 102  */
 103
 104 XBT_PUBLIC(void) lmm_set_default_protocol_function(double (*func_f)
 105                                                     (lmm_variable_t var,
 106                                                      double x),
 107                                                    double (*func_fp)
 108                                                     (lmm_variable_t var,
 109                                                      double x),
 110                                                    double (*func_fpi)
 111                                                     (lmm_variable_t var,
 112                                                      double x));
 113
 114 XBT_PUBLIC(double func_reno_f) (lmm_variable_t var, double x);
 115 XBT_PUBLIC(double func_reno_fp) (lmm_variable_t var, double x);
 116 XBT_PUBLIC(double func_reno_fpi) (lmm_variable_t var, double x);
 117
 118 XBT_PUBLIC(double func_reno2_f) (lmm_variable_t var, double x);
 119 XBT_PUBLIC(double func_reno2_fp) (lmm_variable_t var, double x);
 120 XBT_PUBLIC(double func_reno2_fpi) (lmm_variable_t var, double x);
 121
 122 XBT_PUBLIC(double func_vegas_f) (lmm_variable_t var, double x);
 123 XBT_PUBLIC(double func_vegas_fp) (lmm_variable_t var, double x);
 124 XBT_PUBLIC(double func_vegas_fpi) (lmm_variable_t var, double x);
 125
 126
 127 #endif                          /* _SURF_MAXMIN_H */