src/surf/surf.c

   1 /* Authors: Arnaud Legrand                                                  */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4    under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "surf_private.h"
   7
   8 static xbt_heap_float_t NOW=0;
   9
  10 xbt_dynar_t resource_list = NULL;
  11 tmgr_history_t history = NULL;
  12 lmm_system_t maxmin_system = NULL;
  13
  14 e_surf_action_state_t surf_action_get_state(surf_action_t action)
  15 {
  16   surf_action_state_t action_state = &(action->resource_type->states);
  17
  18   if(action->state_set == action_state->ready_action_set)
  19     return SURF_ACTION_READY;
  20   if(action->state_set == action_state->running_action_set)
  21     return SURF_ACTION_RUNNING;
  22   if(action->state_set == action_state->failed_action_set)
  23     return SURF_ACTION_FAILED;
  24   if(action->state_set == action_state->done_action_set)
  25     return SURF_ACTION_DONE;
  26   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  27 }
  28
  29 void surf_action_free(surf_action_t * action)
  30 {
  31   (*action)->resource_type->action_cancel(*action);
  32   xbt_free(*action);
  33   *action=NULL;
  34 }
  35
  36 void surf_action_change_state(surf_action_t action, e_surf_action_state_t state)
  37 {
  38   surf_action_state_t action_state = &(action->resource_type->states);
  39
  40   xbt_swag_remove(action, action->state_set);
  41
  42   if(state == SURF_ACTION_READY)
  43     action->state_set = action_state->ready_action_set;
  44   else if(state == SURF_ACTION_RUNNING)
  45     action->state_set = action_state->running_action_set;
  46   else if(state == SURF_ACTION_FAILED)
  47     action->state_set = action_state->failed_action_set;
  48   else if(state == SURF_ACTION_DONE)
  49     action->state_set = action_state->done_action_set;
  50   else action->state_set = NULL;
  51
  52   if(action->state_set) xbt_swag_insert(action, action->state_set);
  53 }
  54
  55 void surf_init(void)
  56 {
  57   if(!resource_list) resource_list = xbt_dynar_new(sizeof(surf_resource_t), NULL);
  58   if(!history) history = tmgr_history_new();
  59   if(!maxmin_system) maxmin_system = lmm_system_new();
  60 }
  61
  62 xbt_heap_float_t surf_solve(void)
  63 {
  64   xbt_heap_float_t min = -1.0;
  65   xbt_heap_float_t next_event_date = -1.0;
  66   xbt_heap_float_t resource_next_action_end = -1.0;
  67   xbt_maxmin_float_t value = -1.0;
  68   surf_resource_t resource = NULL;
  69   int i;
  70
  71   xbt_dynar_foreach (resource_list,i,resource) {
  72     resource_next_action_end = resource->share_resources(NOW);
  73     if((min<0) || (resource_next_action_end<min))
  74       min = resource_next_action_end;
  75   }
  76
  77   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
  78     if(next_event_date > NOW+min) break;
  79     while (tmgr_history_get_next_event_leq(history, next_event_date,
  80                                            &value, (void **) &resource)) {
  81       if(surf_cpu_resource->resource.resource_used(resource)) {
  82         min = next_event_date-NOW;
  83       }
  84     }
  85   }
  86
  87   xbt_dynar_foreach (resource_list,i,resource) {
  88     resource->update_state(NOW, min);
  89   }
  90
  91   NOW=NOW+min;
  92
  93   return min;
  94 }
  95
  96 xbt_heap_float_t surf_get_clock(void)
  97 {
  98   return NOW;
  99 }