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[simgrid.git] / 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   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_object_t resource_obj = NULL;
69   surf_resource_t resource = NULL;
70   tmgr_trace_event_t event = NULL;
71   int i;
72
73   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
74     if(next_event_date > NOW) break;
75     while ((event = tmgr_history_get_next_event_leq(history, next_event_date,
76                                            &value, (void **) &resource_obj))) {
77       resource_obj->resource->common_private->update_resource_state(resource_obj,
78                                                                     event, value);
79     }
80   }
81
82   min = -1.0;
83
84   xbt_dynar_foreach (resource_list,i,resource) {
85     resource_next_action_end = resource->common_private->share_resources(NOW);
86     if((min<0) || (resource_next_action_end<min)) 
87       min = resource_next_action_end;
88   }
89
90   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
91     if(next_event_date > NOW+min) break;
92     while ((event=tmgr_history_get_next_event_leq(history, next_event_date,
93                                                   &value, (void **) &resource_obj))) {
94       if(resource_obj->resource->common_public->resource_used(resource_obj)) {
95         min = next_event_date-NOW;
96 /*      update_state of resource_obj according to new value */
97       }
98       resource_obj->resource->common_private->update_resource_state(resource_obj,
99                                                                     event, value);
100     }
101   }
102
103   xbt_dynar_foreach (resource_list,i,resource) {
104     resource->common_private->update_actions_state(NOW, min);
105   }
106
107   NOW=NOW+min;
108
109   return min;
110 }
111
112 xbt_heap_float_t surf_get_clock(void)
113 {
114   return NOW;
115 }