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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 <ctype.h>
9
10 #include "surf_private.h"
11 #include "xbt/module.h"
12
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
14                                 "Logging specific to SURF (kernel)");
15
16 int use_sdp_solver=0;
17
18 /* Additional declarations for Windows potability. */
19
20 #ifndef MAX_DRIVE
21 #define MAX_DRIVE 26
22 #endif 
23
24 #ifdef _WIN32
25 #include <windows.h>
26 static const char* disk_drives_letter_table[MAX_DRIVE] =
27 {
28         "A:\\",
29         "B:\\",
30         "C:\\",
31         "D:\\",
32         "E:\\",
33         "F:\\",
34         "G:\\",
35         "H:\\",
36         "I:\\",
37         "J:\\",
38         "K:\\",
39         "L:\\",
40         "M:\\",
41         "N:\\",
42         "O:\\",
43         "P:\\",
44         "Q:\\",
45         "R:\\",
46         "S:\\",
47         "T:\\",
48         "U:\\",
49         "V:\\",
50         "W:\\",
51         "X:\\",
52         "Y:\\",
53         "Z:\\"
54 };
55 #endif /* #ifdef _WIN32 */
56
57 /*
58  * Returns the initial path. On Windows the initial path is
59  * the current directory for the current process in the other
60  * case the function returns "./" that represents the current
61  * directory on Unix/Linux platforms.
62  */
63                         
64 const char* __surf_get_initial_path(void)
65 {
66
67         #ifdef _WIN32
68         unsigned i;
69         char current_directory[MAX_PATH + 1] = {0};
70         unsigned int len = GetCurrentDirectory(MAX_PATH + 1,current_directory);
71         char root[4] = {0};
72
73         if(!len)
74                 return NULL;
75
76         strncpy(root,current_directory,3);
77
78         for(i = 0; i<MAX_DRIVE;i++)
79         {
80                 if(toupper(root[0]) == disk_drives_letter_table[i][0])
81                         return disk_drives_letter_table[i];
82         }
83
84         return NULL;
85         #else
86         return "./";
87         #endif
88 }
89
90 /* The __surf_is_absolute_file_path() returns 1 if
91  * file_path is a absolute file path, in the other
92  * case the function returns 0.
93  */
94 int __surf_is_absolute_file_path(const char* file_path)
95 {
96         #ifdef _WIN32
97         WIN32_FIND_DATA wfd ={0};
98         HANDLE hFile = FindFirstFile(file_path,&wfd);
99
100         if(INVALID_HANDLE_VALUE == hFile)
101                 return 0;
102
103         FindClose(hFile);
104         return 1;
105         #else
106         return (file_path[0] == '/');
107         #endif
108 }
109
110 typedef struct surf_resource_object {
111   surf_resource_t resource;
112 } s_surf_resource_object_t, *surf_resource_object_t;
113
114 static double NOW = 0;
115
116 xbt_dynar_t resource_list = NULL;
117 tmgr_history_t history = NULL;
118 lmm_system_t maxmin_system = NULL;
119 xbt_dynar_t surf_path = NULL;
120 const char *surf_action_state_names[6] = {
121   "SURF_ACTION_READY", 
122   "SURF_ACTION_RUNNING", 
123   "SURF_ACTION_FAILED", 
124   "SURF_ACTION_DONE", 
125   "SURF_ACTION_TO_FREE", 
126   "SURF_ACTION_NOT_IN_THE_SYSTEM"
127 };
128
129 double generic_maxmin_share_resources(xbt_swag_t running_actions,
130                                        size_t offset)
131 {
132   return  generic_maxmin_share_resources2(running_actions, offset,
133                                           maxmin_system);
134 }
135
136 double generic_maxmin_share_resources2(xbt_swag_t running_actions,
137                                        size_t offset,
138                                        lmm_system_t sys)
139 {
140   surf_action_t action = NULL;
141   double min = -1;
142   double value = -1;
143 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
144
145   if(!use_sdp_solver)
146     lmm_solve(sys);
147   else {
148 #ifdef HAVE_SDP
149     sdp_solve(sys);
150 #else
151     xbt_assert0(0, "No CSDP found! You cannot use this model!");
152 #endif
153   }
154
155   xbt_swag_foreach(action, running_actions) {
156     value = lmm_variable_getvalue(VARIABLE(action));
157     if ((value > 0) || (action->max_duration >= 0))
158       break;
159   }
160
161   if (!action)
162     return -1.0;
163
164   if (value > 0) {
165     min = action->remains / value;
166     if ((action->max_duration >= 0) && (action->max_duration < min))
167       min = action->max_duration;
168   } else
169     min = action->max_duration;
170
171   DEBUG5("Found an action (%p: duration = %f, remains = %f, value = %f) ! %f",action, action->max_duration, action->remains, value, min); 
172
173   for (action = xbt_swag_getNext(action, running_actions->offset);
174        action;
175        action = xbt_swag_getNext(action, running_actions->offset)) {
176     value = lmm_variable_getvalue(VARIABLE(action));
177     if (value > 0) {
178       value = action->remains / value;
179       if (value < min) {
180         min = value;
181         DEBUG2("Updating min (value) with %p: %f",action, min);
182       }
183     }
184     if ((action->max_duration >= 0) && (action->max_duration < min)) {
185       min = action->max_duration;
186       DEBUG2("Updating min (duration) with %p: %f",action, min);
187     }
188   }
189   DEBUG1("min value : %f",min);
190
191 #undef VARIABLE
192   return min;
193 }
194
195 e_surf_action_state_t surf_action_get_state(surf_action_t action)
196 {
197   surf_action_state_t action_state =
198       &(action->resource_type->common_public->states);
199
200   if (action->state_set == action_state->ready_action_set)
201     return SURF_ACTION_READY;
202   if (action->state_set == action_state->running_action_set)
203     return SURF_ACTION_RUNNING;
204   if (action->state_set == action_state->failed_action_set)
205     return SURF_ACTION_FAILED;
206   if (action->state_set == action_state->done_action_set)
207     return SURF_ACTION_DONE;
208   return SURF_ACTION_NOT_IN_THE_SYSTEM;
209 }
210
211 double surf_action_get_start_time(surf_action_t action) {
212   return action->start;
213 }
214
215 double surf_action_get_finish_time(surf_action_t action) {
216   return action->finish;
217 }
218
219 void surf_action_free(surf_action_t * action)
220 {
221   (*action)->resource_type->common_public->action_cancel(*action);
222   free(*action);
223   *action = NULL;
224 }
225
226 void surf_action_change_state(surf_action_t action,
227                               e_surf_action_state_t state)
228 {
229   surf_action_state_t action_state =
230       &(action->resource_type->common_public->states);
231   XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
232   xbt_swag_remove(action, action->state_set);
233
234   if (state == SURF_ACTION_READY)
235     action->state_set = action_state->ready_action_set;
236   else if (state == SURF_ACTION_RUNNING)
237     action->state_set = action_state->running_action_set;
238   else if (state == SURF_ACTION_FAILED)
239     action->state_set = action_state->failed_action_set;
240   else if (state == SURF_ACTION_DONE)
241     action->state_set = action_state->done_action_set;
242   else
243     action->state_set = NULL;
244
245   if (action->state_set)
246     xbt_swag_insert(action, action->state_set);
247   XBT_OUT;
248 }
249
250 void surf_action_set_data(surf_action_t action,
251                           void *data)
252 {
253   action->data=data;
254 }
255
256 void surf_init(int *argc, char **argv)
257 {
258   int i,j;
259   char *opt;
260   
261   const char* initial_path;
262
263   xbt_init(argc, argv);
264   if (!surf_path) {
265     
266     /* retrieves the current directory of the current process*/
267     initial_path = __surf_get_initial_path();
268                 
269         xbt_assert0((initial_path), "__surf_get_initial_path() failed! Can't resolves current Windows directory");
270     
271     surf_path = xbt_dynar_new(sizeof(char*), NULL);
272     xbt_dynar_push(surf_path,&initial_path);
273
274     for (i=1; i<*argc; i++) {
275       if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
276         opt=strchr(argv[i],'=');
277         opt++;
278         xbt_dynar_push(surf_path,&opt);
279         /*remove this from argv*/
280         for (j=i+1; j<*argc; j++) {
281           argv[j-1] = argv[j];
282         } 
283         argv[j-1] = NULL;
284         (*argc)--;
285         i--; /* compensate effect of next loop incrementation */
286       }
287     }
288   }
289   if (!resource_list)
290     resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
291   if (!history)
292     history = tmgr_history_new();
293   if (!maxmin_system)
294     maxmin_system = lmm_system_new();
295 }
296
297 static char* path_name = NULL;
298 FILE *surf_fopen(const char *name, const char *mode)
299 {
300   int i; 
301   char* path = NULL;
302   FILE *file = NULL;
303   int path_name_len = 0; /* don't count '\0' */
304
305   xbt_assert0(name, "Need a non-NULL file name");
306
307   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
308    
309   if (__surf_is_absolute_file_path(name)) { /* don't mess with absolute file names */
310     return fopen(name,mode);
311      
312   } else { /* search relative files in the path */
313    
314     if(!path_name) {
315        path_name_len = strlen(name);
316        path_name=xbt_new0(char,path_name_len+1);
317     }
318
319     xbt_dynar_foreach(surf_path,i,path) {
320       if(path_name_len < strlen(path)+strlen(name)+1) {
321          path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
322          path_name=xbt_realloc(path_name,path_name_len+1);
323       }
324       sprintf(path_name,"%s/%s",path, name);
325       file = fopen(path_name,mode);
326       if (file) return file;
327     }
328   }
329   return file;
330 }
331
332 void surf_exit(void)
333 {
334   int i;
335   surf_resource_t resource = NULL;
336
337   xbt_dynar_foreach(resource_list, i, resource) {
338     resource->common_private->finalize();
339   }
340
341   if (maxmin_system) {
342     lmm_system_free(maxmin_system);
343     maxmin_system = NULL;
344   }
345   if (history) {
346     tmgr_history_free(history);
347     history = NULL;
348   }
349   if (resource_list)
350     xbt_dynar_free(&resource_list);
351
352   if(surf_path) 
353     xbt_dynar_free(&surf_path);
354
355   tmgr_finalize();
356   surf_parse_lex_destroy();
357   if(path_name) {
358     free(path_name);
359     path_name = NULL;
360   }
361   xbt_exit();
362 }
363
364 double surf_solve(void)
365 {
366   static int first_run = 1;
367
368   double min = -1.0;
369   double next_event_date = -1.0;
370   double resource_next_action_end = -1.0;
371   double value = -1.0;
372   surf_resource_object_t resource_obj = NULL;
373   surf_resource_t resource = NULL;
374   tmgr_trace_event_t event = NULL;
375   int i;
376
377   if (first_run) {
378     DEBUG0("First Run! Let's \"purge\" events and put resources in the right state");
379     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
380       if (next_event_date > NOW)
381         break;
382       while ((event =
383               tmgr_history_get_next_event_leq(history, next_event_date,
384                                               &value,
385                                               (void **) &resource_obj))) {
386         resource_obj->resource->common_private->
387             update_resource_state(resource_obj, event, value);
388       }
389     }
390     xbt_dynar_foreach(resource_list, i, resource) {
391       resource->common_private->update_actions_state(NOW, 0.0);
392     }
393     first_run = 0;
394     return 0.0;
395   }
396
397   min = -1.0;
398
399   DEBUG0("Looking for next action end");
400   xbt_dynar_foreach(resource_list, i, resource) {
401     resource_next_action_end =
402         resource->common_private->share_resources(NOW);
403     DEBUG2("Resource [%s] : next action end = %f",resource->common_public->name,
404            resource_next_action_end);
405     if (((min < 0.0) || (resource_next_action_end < min))
406         && (resource_next_action_end >= 0.0))
407       min = resource_next_action_end;
408   }
409   DEBUG1("Next action end : %f", min);
410
411   if (min < 0.0)
412     return -1.0;
413
414   DEBUG0("Looking for next event");
415   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
416     DEBUG1("Next event : %f",next_event_date);
417     if (next_event_date > NOW + min)
418       break;
419     DEBUG0("Updating resources");
420     while ((event =
421             tmgr_history_get_next_event_leq(history, next_event_date,
422                                             &value,
423                                             (void **) &resource_obj))) {
424       if (resource_obj->resource->common_private->
425           resource_used(resource_obj)) {
426         min = next_event_date - NOW;
427         DEBUG1("This event will modify resource state. Next event set to %f", min);
428       }
429       /* update state of resource_obj according to new value. Does not touch lmm.
430          It will be modified if needed when updating actions */
431       resource_obj->resource->common_private->
432           update_resource_state(resource_obj, event, value);
433     }
434   }
435
436   DEBUG1("Duration set to %f", min);
437
438   NOW = NOW + min;
439
440   xbt_dynar_foreach(resource_list, i, resource) {
441     resource->common_private->update_actions_state(NOW, min);
442   }
443
444   return min;
445 }
446
447 double surf_get_clock(void)
448 {
449   return NOW;
450 }