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 }