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Direct context switching: clean the semantics of parmap
[simgrid.git] / src / surf / surf_action.c
1 /* Copyright (c) 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 #include "surf_private.h"
8 #include "network_private.h"
9 #include "xbt/mallocator.h"
10
11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_kernel);
12
13 /*
14  * Generic action
15  */
16
17 const char *surf_action_state_names[6] = {
18   "SURF_ACTION_READY",
19   "SURF_ACTION_RUNNING",
20   "SURF_ACTION_FAILED",
21   "SURF_ACTION_DONE",
22   "SURF_ACTION_TO_FREE",
23   "SURF_ACTION_NOT_IN_THE_SYSTEM"
24 };
25
26 /* Surf actions mallocator */
27 static xbt_mallocator_t action_mallocator = NULL;
28 static int action_mallocator_allocated_size = 0;
29 static void* surf_action_mallocator_new_f(void);
30 static void surf_action_mallocator_free_f(void* action);
31 static void surf_action_mallocator_reset_f(void* action);
32
33 /**
34  * \brief Initializes the action module of Surf.
35  */
36 void surf_action_init(void) {
37
38   /* the action mallocator will always provide actions of the following size,
39    * so this size should be set to the maximum size of the surf action structures
40    */
41   action_mallocator_allocated_size = sizeof(s_surf_action_network_CM02_t);
42   action_mallocator = xbt_mallocator_new(65536, surf_action_mallocator_new_f,
43       surf_action_mallocator_free_f, surf_action_mallocator_reset_f);
44 }
45
46 /**
47  * \brief Uninitializes the action module of Surf.
48  */
49 void surf_action_exit(void) {
50
51   xbt_mallocator_free(action_mallocator);
52 }
53
54 static void* surf_action_mallocator_new_f(void) {
55   return xbt_malloc(action_mallocator_allocated_size);
56 }
57
58 static void surf_action_mallocator_free_f(void* action) {
59   xbt_free(action);
60 }
61
62 static void surf_action_mallocator_reset_f(void* action) {
63   memset(action, 0, action_mallocator_allocated_size);
64 }
65
66 void *surf_action_new(size_t size, double cost, surf_model_t model,
67                       int failed)
68 {
69   xbt_assert(size <= action_mallocator_allocated_size,
70       "Cannot create a surf action of size %zu: the mallocator only provides actions of size %d",
71       size, action_mallocator_allocated_size);
72
73   surf_action_t action = xbt_mallocator_get(action_mallocator);
74   action->refcount = 1;
75   action->cost = cost;
76   action->remains = cost;
77   action->priority = 1.0;
78   action->max_duration = NO_MAX_DURATION;
79   action->start = surf_get_clock();
80   action->finish = -1.0;
81   action->model_type = model;
82 #ifdef HAVE_TRACING
83   action->category = NULL;
84 #endif
85
86   if (failed)
87     action->state_set = model->states.failed_action_set;
88   else
89     action->state_set = model->states.running_action_set;
90
91   xbt_swag_insert(action, action->state_set);
92
93   return action;
94 }
95
96 e_surf_action_state_t surf_action_state_get(surf_action_t action)
97 {
98   surf_action_state_t action_state = &(action->model_type->states);
99
100   if (action->state_set == action_state->ready_action_set)
101     return SURF_ACTION_READY;
102   if (action->state_set == action_state->running_action_set)
103     return SURF_ACTION_RUNNING;
104   if (action->state_set == action_state->failed_action_set)
105     return SURF_ACTION_FAILED;
106   if (action->state_set == action_state->done_action_set)
107     return SURF_ACTION_DONE;
108   return SURF_ACTION_NOT_IN_THE_SYSTEM;
109 }
110
111 double surf_action_get_start_time(surf_action_t action)
112 {
113   return action->start;
114 }
115
116 double surf_action_get_finish_time(surf_action_t action)
117 {
118   /* keep the function behavior, some models (cpu_ti) change the finish time before the action end */
119   return action->remains == 0 ? action->finish : -1;
120 }
121
122 XBT_INLINE void surf_action_free(surf_action_t * action)
123 {
124   xbt_mallocator_release(action_mallocator, *action);
125   *action = NULL;
126 }
127
128 void surf_action_state_set(surf_action_t action,
129                            e_surf_action_state_t state)
130 {
131   surf_action_state_t action_state = &(action->model_type->states);
132   XBT_IN("(%p,%s)", action, surf_action_state_names[state]);
133   xbt_swag_remove(action, action->state_set);
134
135   if (state == SURF_ACTION_READY)
136     action->state_set = action_state->ready_action_set;
137   else if (state == SURF_ACTION_RUNNING)
138     action->state_set = action_state->running_action_set;
139   else if (state == SURF_ACTION_FAILED)
140     action->state_set = action_state->failed_action_set;
141   else if (state == SURF_ACTION_DONE)
142     action->state_set = action_state->done_action_set;
143   else
144     action->state_set = NULL;
145
146   if (action->state_set)
147     xbt_swag_insert(action, action->state_set);
148   XBT_OUT();
149 }
150
151 void surf_action_data_set(surf_action_t action, void *data)
152 {
153   action->data = data;
154 }
155
156 XBT_INLINE void surf_action_ref(surf_action_t action)
157 {
158   action->refcount++;
159 }
160
161 /*
162 void surf_action_suspend(surf_action_t action)
163 {
164   action->suspended = 1;
165 }*/
166
167 /*
168  * Maxmin action
169  */