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
 172   for (action = xbt_swag_getNext(action, running_actions->offset);
 173        action;
 174        action = xbt_swag_getNext(action, running_actions->offset)) {
 175     value = lmm_variable_getvalue(VARIABLE(action));
 176     if (value > 0) {
 177       value = action->remains / value;
 178       if (value < min)
 179         min = value;
 180     }
 181     if ((action->max_duration >= 0) && (action->max_duration < min))
 182       min = action->max_duration;
 183   }
 184 #undef VARIABLE
 185   return min;
 186 }
 187
 188 e_surf_action_state_t surf_action_get_state(surf_action_t action)
 189 {
 190   surf_action_state_t action_state =
 191       &(action->resource_type->common_public->states);
 192
 193   if (action->state_set == action_state->ready_action_set)
 194     return SURF_ACTION_READY;
 195   if (action->state_set == action_state->running_action_set)
 196     return SURF_ACTION_RUNNING;
 197   if (action->state_set == action_state->failed_action_set)
 198     return SURF_ACTION_FAILED;
 199   if (action->state_set == action_state->done_action_set)
 200     return SURF_ACTION_DONE;
 201   return SURF_ACTION_NOT_IN_THE_SYSTEM;
 202 }
 203
 204 double surf_action_get_start_time(surf_action_t action) {
 205   return action->start;
 206 }
 207
 208 double surf_action_get_finish_time(surf_action_t action) {
 209   return action->finish;
 210 }
 211
 212 void surf_action_free(surf_action_t * action)
 213 {
 214   (*action)->resource_type->common_public->action_cancel(*action);
 215   free(*action);
 216   *action = NULL;
 217 }
 218
 219 void surf_action_change_state(surf_action_t action,
 220                               e_surf_action_state_t state)
 221 {
 222   surf_action_state_t action_state =
 223       &(action->resource_type->common_public->states);
 224   XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
 225   xbt_swag_remove(action, action->state_set);
 226
 227   if (state == SURF_ACTION_READY)
 228     action->state_set = action_state->ready_action_set;
 229   else if (state == SURF_ACTION_RUNNING)
 230     action->state_set = action_state->running_action_set;
 231   else if (state == SURF_ACTION_FAILED)
 232     action->state_set = action_state->failed_action_set;
 233   else if (state == SURF_ACTION_DONE)
 234     action->state_set = action_state->done_action_set;
 235   else
 236     action->state_set = NULL;
 237
 238   if (action->state_set)
 239     xbt_swag_insert(action, action->state_set);
 240   XBT_OUT;
 241 }
 242
 243 void surf_action_set_data(surf_action_t action,
 244                           void *data)
 245 {
 246   action->data=data;
 247 }
 248
 249 void surf_init(int *argc, char **argv)
 250 {
 251   int i,j;
 252   char *opt;
 253
 254   const char* initial_path;
 255
 256   xbt_init(argc, argv);
 257   if (!surf_path) {
 258
 259     /* retrieves the current directory of the current process*/
 260     initial_path = __surf_get_initial_path();
 261
 262         xbt_assert0((initial_path), "__surf_get_initial_path() failed! Can't resolves current Windows directory");
 263
 264     surf_path = xbt_dynar_new(sizeof(char*), NULL);
 265     xbt_dynar_push(surf_path,&initial_path);
 266
 267     for (i=1; i<*argc; i++) {
 268       if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
 269         opt=strchr(argv[i],'=');
 270         opt++;
 271         xbt_dynar_push(surf_path,&opt);
 272         /*remove this from argv*/
 273         for (j=i+1; j<*argc; j++) {
 274           argv[j-1] = argv[j];
 275         }
 276         argv[j-1] = NULL;
 277         (*argc)--;
 278         i--; /* compensate effect of next loop incrementation */
 279       }
 280     }
 281   }
 282   if (!resource_list)
 283     resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
 284   if (!history)
 285     history = tmgr_history_new();
 286   if (!maxmin_system)
 287     maxmin_system = lmm_system_new();
 288 }
 289
 290 static char* path_name = NULL;
 291 FILE *surf_fopen(const char *name, const char *mode)
 292 {
 293   int i;
 294   char* path = NULL;
 295   FILE *file = NULL;
 296   int path_name_len = 0; /* don't count '\0' */
 297
 298   xbt_assert0(name, "Need a non-NULL file name");
 299
 300   xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
 301
 302   if (__surf_is_absolute_file_path(name)) { /* don't mess with absolute file names */
 303     return fopen(name,mode);
 304
 305   } else { /* search relative files in the path */
 306
 307     if(!path_name) {
 308        path_name_len = strlen(name);
 309        path_name=xbt_new0(char,path_name_len+1);
 310     }
 311
 312     xbt_dynar_foreach(surf_path,i,path) {
 313       if(path_name_len < strlen(path)+strlen(name)+1) {
 314          path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
 315          path_name=xbt_realloc(path_name,path_name_len+1);
 316       }
 317       sprintf(path_name,"%s/%s",path, name);
 318       file = fopen(path_name,mode);
 319       if (file) return file;
 320     }
 321   }
 322   return file;
 323 }
 324
 325 void surf_exit(void)
 326 {
 327   int i;
 328   surf_resource_t resource = NULL;
 329
 330   xbt_dynar_foreach(resource_list, i, resource) {
 331     resource->common_private->finalize();
 332   }
 333
 334   if (maxmin_system) {
 335     lmm_system_free(maxmin_system);
 336     maxmin_system = NULL;
 337   }
 338   if (history) {
 339     tmgr_history_free(history);
 340     history = NULL;
 341   }
 342   if (resource_list)
 343     xbt_dynar_free(&resource_list);
 344
 345   if(surf_path)
 346     xbt_dynar_free(&surf_path);
 347
 348   tmgr_finalize();
 349   surf_parse_lex_destroy();
 350   if(path_name) {
 351     free(path_name);
 352     path_name = NULL;
 353   }
 354   xbt_exit();
 355 }
 356
 357 double surf_solve(void)
 358 {
 359   static int first_run = 1;
 360
 361   double min = -1.0;
 362   double next_event_date = -1.0;
 363   double resource_next_action_end = -1.0;
 364   double value = -1.0;
 365   surf_resource_object_t resource_obj = NULL;
 366   surf_resource_t resource = NULL;
 367   tmgr_trace_event_t event = NULL;
 368   int i;
 369
 370   if (first_run) {
 371     DEBUG0("First Run! Let's \"purge\" events and put resources in the right state");
 372     while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 373       if (next_event_date > NOW)
 374         break;
 375       while ((event =
 376               tmgr_history_get_next_event_leq(history, next_event_date,
 377                                               &value,
 378                                               (void **) &resource_obj))) {
 379         resource_obj->resource->common_private->
 380             update_resource_state(resource_obj, event, value);
 381       }
 382     }
 383     xbt_dynar_foreach(resource_list, i, resource) {
 384       resource->common_private->update_actions_state(NOW, 0.0);
 385     }
 386     first_run = 0;
 387     return 0.0;
 388   }
 389
 390   min = -1.0;
 391
 392   DEBUG0("Looking for next action end");
 393   xbt_dynar_foreach(resource_list, i, resource) {
 394     resource_next_action_end =
 395         resource->common_private->share_resources(NOW);
 396     DEBUG2("Resource [%s] : next action end = %f",resource->common_public->name,
 397            resource_next_action_end);
 398     if (((min < 0.0) || (resource_next_action_end < min))
 399         && (resource_next_action_end >= 0.0))
 400       min = resource_next_action_end;
 401   }
 402   DEBUG1("Next action end : %f", min);
 403
 404   if (min < 0.0)
 405     return -1.0;
 406
 407   DEBUG0("Looking for next event");
 408   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
 409     DEBUG1("Next event : %f",next_event_date);
 410     if (next_event_date > NOW + min)
 411       break;
 412     DEBUG0("Updating resources");
 413     while ((event =
 414             tmgr_history_get_next_event_leq(history, next_event_date,
 415                                             &value,
 416                                             (void **) &resource_obj))) {
 417       if (resource_obj->resource->common_private->
 418           resource_used(resource_obj)) {
 419         min = next_event_date - NOW;
 420         DEBUG1("This event will modify resource state. Next event set to %f", min);
 421       }
 422       /* update state of resource_obj according to new value. Does not touch lmm.
 423          It will be modified if needed when updating actions */
 424       resource_obj->resource->common_private->
 425           update_resource_state(resource_obj, event, value);
 426     }
 427   }
 428
 429   DEBUG1("Duration set to %f", min);
 430
 431   NOW = NOW + min;
 432
 433   xbt_dynar_foreach(resource_list, i, resource) {
 434     resource->common_private->update_actions_state(NOW, min);
 435   }
 436
 437   return min;
 438 }
 439
 440 double surf_get_clock(void)
 441 {
 442   return NOW;
 443 }