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[simgrid.git] / src / surf / surf.c
1 /*      $Id$     */
2
3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
4
5 /* This program is free software; you can redistribute it and/or modify it
6  * under the terms of the license (GNU LGPL) which comes with this package. */
7
8 #include "surf_private.h"
9 #include "xbt/module.h"
10
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
12                                 "Logging specific to SURF (kernel)");
13
14
15 /* Additional declarations for Windows potability. */
16
17 #ifndef MAX_DRIVE
18 #define MAX_DRIVE 26
19 #endif 
20
21 #ifdef _WIN32
22 static const char* disk_drives_letter_table[MAX_DRIVE] =
23 {
24         "A:\\",
25         "B:\\",
26         "C:\\",
27         "D:\\",
28         "E:\\",
29         "F:\\",
30         "G:\\",
31         "H:\\",
32         "I:\\",
33         "J:\\",
34         "K:\\",
35         "L:\\",
36         "M:\\",
37         "N:\\",
38         "O:\\",
39         "P:\\",
40         "Q:\\",
41         "R:\\",
42         "S:\\",
43         "T:\\",
44         "U:\\",
45         "V:\\",
46         "W:\\",
47         "X:\\",
48         "Y:\\",
49         "Z:\\"
50 };
51 #endif /* #ifdef _WIN32 */
52
53 /*
54  * Returns the initial path. On Windows the initial path is
55  * the current directory for the current process in the other
56  * case the function returns "./" that represents the current
57  * directory on Unix/Linux platforms.
58  */
59                         
60 const char* __surf_get_initial_path(void)
61 {
62
63         #ifdef _WIN32
64         unsigned i;
65         char current_directory[MAX_PATH + 1] = {0};
66         unsigned int len = GetCurrentDirectory(MAX_PATH + 1,current_directory);
67         char root[4] = {0};
68
69         if(!len)
70                 return NULL;
71
72         strncpy(root,current_directory,3);
73
74         for(i = 0; i<MAX_DRIVE;i++)
75         {
76                 if(root[0] == disk_drives_letter_table[i][0])
77                         return disk_drives_letter_table[i];
78         }
79
80         return NULL;
81         #else
82         return "./";
83         #endif
84 }
85
86 /* The __surf_is_absolute_file_path() returns 1 if
87  * file_path is a absolute file path, in the other
88  * case the function returns 0.
89  */
90 int __surf_is_absolute_file_path(const char* file_path)
91 {
92         #ifdef _WIN32
93         WIN32_FIND_DATA wfd ={0};
94         HANDLE hFile = FindFirstFile(file_path,&wfd);
95
96         if(INVALID_HANDLE_VALUE == hFile)
97                 return 0;
98
99         FindClose(hFile);
100         return 1;
101         #else
102         return (file_path[0] == '/');
103         #endif
104 }
105
106 typedef struct surf_resource_object {
107   surf_resource_t resource;
108 } s_surf_resource_object_t, *surf_resource_object_t;
109
110 static double NOW = 0;
111
112 xbt_dynar_t resource_list = NULL;
113 tmgr_history_t history = NULL;
114 lmm_system_t maxmin_system = NULL;
115 xbt_dynar_t surf_path = NULL;
116 const char *surf_action_state_names[6] = {
117   "SURF_ACTION_READY", 
118   "SURF_ACTION_RUNNING", 
119   "SURF_ACTION_FAILED", 
120   "SURF_ACTION_DONE", 
121   "SURF_ACTION_TO_FREE", 
122   "SURF_ACTION_NOT_IN_THE_SYSTEM"
123 };
124
125 double generic_maxmin_share_resources(xbt_swag_t running_actions,
126                                        size_t offset)
127 {
128   return  generic_maxmin_share_resources2(running_actions, offset,
129                                           maxmin_system);
130 }
131
132 double generic_maxmin_share_resources2(xbt_swag_t running_actions,
133                                        size_t offset,
134                                        lmm_system_t sys)
135 {
136   surf_action_t action = NULL;
137   double min = -1;
138   double value = -1;
139 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
140
141   lmm_solve(sys);
142
143   xbt_swag_foreach(action, running_actions) {
144     value = lmm_variable_getvalue(VARIABLE(action));
145     if ((value > 0) || (action->max_duration >= 0))
146       break;
147   }
148
149   if (!action)
150     return -1.0;
151
152   if (value > 0) {
153     min = action->remains / value;
154     if ((action->max_duration >= 0) && (action->max_duration < min))
155       min = action->max_duration;
156   } else
157     min = action->max_duration;
158
159
160   for (action = xbt_swag_getNext(action, running_actions->offset);
161        action;
162        action = xbt_swag_getNext(action, running_actions->offset)) {
163     value = lmm_variable_getvalue(VARIABLE(action));
164     if (value > 0) {
165       value = action->remains / value;
166       if (value < min)
167         min = value;
168     }
169     if ((action->max_duration >= 0) && (action->max_duration < min))
170       min = action->max_duration;
171   }
172 #undef VARIABLE
173   return min;
174 }
175
176 e_surf_action_state_t surf_action_get_state(surf_action_t action)
177 {
178   surf_action_state_t action_state =
179       &(action->resource_type->common_public->states);
180
181   if (action->state_set == action_state->ready_action_set)
182     return SURF_ACTION_READY;
183   if (action->state_set == action_state->running_action_set)
184     return SURF_ACTION_RUNNING;
185   if (action->state_set == action_state->failed_action_set)
186     return SURF_ACTION_FAILED;
187   if (action->state_set == action_state->done_action_set)
188     return SURF_ACTION_DONE;
189   return SURF_ACTION_NOT_IN_THE_SYSTEM;
190 }
191
192 double surf_action_get_start_time(surf_action_t action) {
193   return action->start;
194 }
195
196 double surf_action_get_finish_time(surf_action_t action) {
197   return action->finish;
198 }
199
200 void surf_action_free(surf_action_t * action)
201 {
202   (*action)->resource_type->common_public->action_cancel(*action);
203   free(*action);
204   *action = NULL;
205 }
206
207 void surf_action_change_state(surf_action_t action,
208                               e_surf_action_state_t state)
209 {
210   surf_action_state_t action_state =
211       &(action->resource_type->common_public->states);
212   XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
213   xbt_swag_remove(action, action->state_set);
214
215   if (state == SURF_ACTION_READY)
216     action->state_set = action_state->ready_action_set;
217   else if (state == SURF_ACTION_RUNNING)
218     action->state_set = action_state->running_action_set;
219   else if (state == SURF_ACTION_FAILED)
220     action->state_set = action_state->failed_action_set;
221   else if (state == SURF_ACTION_DONE)
222     action->state_set = action_state->done_action_set;
223   else
224     action->state_set = NULL;
225
226   if (action->state_set)
227     xbt_swag_insert(action, action->state_set);
228   XBT_OUT;
229 }
230
231 void surf_action_set_data(surf_action_t action,
232                           void *data)
233 {
234   action->data=data;
235 }
236
237 void surf_init(int *argc, char **argv)
238 {
239   int i,j;
240   char *opt;
241   
242   const char* initial_path;
243
244   xbt_init(argc, argv);
245   if (!surf_path) {
246     
247     /* retrieves the current directory of the current process*/
248     initial_path = __surf_get_initial_path();
249                 
250         xbt_assert0((initial_path), "__surf_get_initial_path() failed! Can't resolves current Windows directory");
251     
252     surf_path = xbt_dynar_new(sizeof(char*), NULL);
253     xbt_dynar_push(surf_path,&initial_path);
254
255     for (i=1; i<*argc; i++) {
256       if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
257         opt=strchr(argv[i],'=');
258         opt++;
259         xbt_dynar_push(surf_path,&opt);
260         /*remove this from argv*/
261         for (j=i+1; j<*argc; j++) {
262           argv[j-1] = argv[j];
263         } 
264         argv[j-1] = NULL;
265         (*argc)--;
266         i--; /* compensate effect of next loop incrementation */
267       }
268     }
269   }
270   if (!resource_list)
271     resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
272   if (!history)
273     history = tmgr_history_new();
274   if (!maxmin_system)
275     maxmin_system = lmm_system_new();
276 }
277
278 static char* path_name = NULL;
279 FILE *surf_fopen(const char *name, const char *mode)
280 {
281   int i; 
282   char* path = NULL;
283   FILE *file = NULL;
284   int path_name_len = 0; /* don't count '\0' */
285
286   xbt_assert0(name, "Need a non-NULL file name");
287
288   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
289    
290   if (__surf_is_absolute_file_path(name)) { /* don't mess with absolute file names */
291     return fopen(name,mode);
292      
293   } else { /* search relative files in the path */
294    
295     if(!path_name) {
296        path_name_len = strlen(name);
297        path_name=xbt_new0(char,path_name_len+1);
298     }
299
300     xbt_dynar_foreach(surf_path,i,path) {
301       if(path_name_len < strlen(path)+strlen(name)+1) {
302          path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
303          path_name=xbt_realloc(path_name,path_name_len+1);
304       }
305       sprintf(path_name,"%s/%s",path, name);
306       file = fopen(path_name,mode);
307       if (file) return file;
308     }
309   }
310   return file;
311 }
312
313 void surf_exit(void)
314 {
315   int i;
316   surf_resource_t resource = NULL;
317
318   xbt_dynar_foreach(resource_list, i, resource) {
319     resource->common_private->finalize();
320   }
321
322   if (maxmin_system) {
323     lmm_system_free(maxmin_system);
324     maxmin_system = NULL;
325   }
326   if (history) {
327     tmgr_history_free(history);
328     history = NULL;
329   }
330   if (resource_list)
331     xbt_dynar_free(&resource_list);
332
333   if(surf_path) 
334     xbt_dynar_free(&surf_path);
335
336   tmgr_finalize();
337   surf_parse_lex_destroy();
338   if(path_name) {
339     free(path_name);
340     path_name = NULL;
341   }
342   xbt_exit();
343 }
344
345 double surf_solve(void)
346 {
347   static int first_run = 1;
348
349   double min = -1.0;
350   double next_event_date = -1.0;
351   double resource_next_action_end = -1.0;
352   double value = -1.0;
353   surf_resource_object_t resource_obj = NULL;
354   surf_resource_t resource = NULL;
355   tmgr_trace_event_t event = NULL;
356   int i;
357
358   if (first_run) {
359     DEBUG0("First Run! Let's \"purge\" events and put resources in the right state");
360     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
361       if (next_event_date > NOW)
362         break;
363       while ((event =
364               tmgr_history_get_next_event_leq(history, next_event_date,
365                                               &value,
366                                               (void **) &resource_obj))) {
367         resource_obj->resource->common_private->
368             update_resource_state(resource_obj, event, value);
369       }
370     }
371     xbt_dynar_foreach(resource_list, i, resource) {
372       resource->common_private->update_actions_state(NOW, 0.0);
373     }
374     first_run = 0;
375     return 0.0;
376   }
377
378   min = -1.0;
379
380   DEBUG0("Looking for next action end");
381   xbt_dynar_foreach(resource_list, i, resource) {
382     resource_next_action_end =
383         resource->common_private->share_resources(NOW);
384     DEBUG2("Resource [%s] : next action end = %f",resource->common_public->name,
385            resource_next_action_end);
386     if (((min < 0.0) || (resource_next_action_end < min))
387         && (resource_next_action_end >= 0.0))
388       min = resource_next_action_end;
389   }
390   DEBUG1("Next action end : %f", min);
391
392   if (min < 0.0)
393     return -1.0;
394
395   DEBUG0("Looking for next event");
396   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
397     DEBUG1("Next event : %f",next_event_date);
398     if (next_event_date > NOW + min)
399       break;
400     DEBUG0("Updating resources");
401     while ((event =
402             tmgr_history_get_next_event_leq(history, next_event_date,
403                                             &value,
404                                             (void **) &resource_obj))) {
405       if (resource_obj->resource->common_private->
406           resource_used(resource_obj)) {
407         min = next_event_date - NOW;
408         DEBUG1("This event will modify resource state. Next event set to %f", min);
409       }
410       /* update state of resource_obj according to new value. Does not touch lmm.
411          It will be modified if needed when updating actions */
412       resource_obj->resource->common_private->
413           update_resource_state(resource_obj, event, value);
414     }
415   }
416
417   DEBUG1("Duration set to %f", min);
418
419   NOW = NOW + min;
420
421   xbt_dynar_foreach(resource_list, i, resource) {
422     resource->common_private->update_actions_state(NOW, min);
423   }
424
425   return min;
426 }
427
428 double surf_get_clock(void)
429 {
430   return NOW;
431 }