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->common_public->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->common_public->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->common_public->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_private_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   static int first_run = 1;
  65
  66   xbt_heap_float_t min = -1.0;
  67   xbt_heap_float_t next_event_date = -1.0;
  68   xbt_heap_float_t resource_next_action_end = -1.0;
  69   xbt_maxmin_float_t value = -1.0;
  70   surf_resource_object_t resource_obj = NULL;
  71   surf_resource_t resource = NULL;
  72   tmgr_trace_event_t event = NULL;
  73   int i;
  74
  75   if(first_run) {
  76     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
  77       if(next_event_date > NOW) break;
  78       while ((event = tmgr_history_get_next_event_leq(history, next_event_date,
  79                                                       &value, (void **) &resource_obj))) {
  80         resource_obj->resource->common_private->update_resource_state(resource_obj,
  81                                                                       event, value);
  82       }
  83     }
  84     xbt_dynar_foreach (resource_list,i,resource) {
  85       resource->common_private->update_actions_state(NOW, 0.0);
  86     }
  87     first_run = 0;
  88     return 0.0;
  89   }
  90
  91   min = -1.0;
  92
  93   xbt_dynar_foreach (resource_list,i,resource) {
  94     resource_next_action_end = resource->common_private->share_resources(NOW);
  95     if((min<0) || (resource_next_action_end<min))
  96       min = resource_next_action_end;
  97   }
  98
  99   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 100     if(next_event_date > NOW+min) break;
 101     while ((event=tmgr_history_get_next_event_leq(history, next_event_date,
 102                                                   &value, (void **) &resource_obj))) {
 103       if(resource_obj->resource->common_public->resource_used(resource_obj)) {
 104         min = next_event_date-NOW;
 105       }
 106       /* update state of resource_obj according to new value. Does not touch lmm.
 107          It will be modified if needed when updating actions */
 108       resource_obj->resource->common_private->update_resource_state(resource_obj,
 109                                                                     event, value);
 110     }
 111   }
 112
 113   xbt_dynar_foreach (resource_list,i,resource) {
 114     resource->common_private->update_actions_state(NOW, min);
 115   }
 116
 117   NOW=NOW+min;
 118
 119   return min;
 120 }
 121
 122 xbt_heap_float_t surf_get_clock(void)
 123 {
 124   return NOW;
 125 }