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A commit before a design modification. I'm gonna try the weird
[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->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   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
72     if(next_event_date > NOW) break;
73     while (tmgr_history_get_next_event_leq(history, next_event_date,
74                                            &value, (void **) &resource)) {
75       if(surf_cpu_resource->resource.resource_used(resource)) {
76         min = next_event_date-NOW;
77       }
78     }
79   }
80
81   xbt_dynar_foreach (resource_list,i,resource) {
82     resource_next_action_end = resource->share_resources(NOW);
83     if((min<0) || (resource_next_action_end<min)) 
84       min = resource_next_action_end;
85   }
86
87   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
88     if(next_event_date > NOW+min) break;
89     while (tmgr_history_get_next_event_leq(history, next_event_date,
90                                            &value, (void **) &resource)) {
91       if(surf_cpu_resource->resource.resource_used(resource)) {
92         min = next_event_date-NOW;
93       }
94     }
95   }
96
97   xbt_dynar_foreach (resource_list,i,resource) {
98     resource->update_state(NOW, min);
99   }
100
101   NOW=NOW+min;
102
103   return min;
104 }
105
106 xbt_heap_float_t surf_get_clock(void)
107 {
108   return NOW;
109 }