src/simix/smx_io.c

   1 /* Copyright (c) 2007, 2008, 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 "smx_private.h"
   8 #include "xbt/sysdep.h"
   9 #include "xbt/log.h"
  10 #include "xbt/dict.h"
  11 #include "mc/mc.h"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix,
  14                                 "Logging specific to SIMIX (io)");
  15
  16
  17 //SIMIX FILE READ
  18 void SIMIX_pre_file_read(smx_simcall_t simcall)
  19 {
  20   smx_action_t action = SIMIX_file_read(simcall->issuer,
  21       simcall->file_read.storage,
  22       simcall->file_read.ptr,
  23       simcall->file_read.size,
  24       simcall->file_read.nmemb,
  25       simcall->file_read.stream);
  26   xbt_fifo_push(action->simcalls, simcall);
  27   simcall->issuer->waiting_action = action;
  28 }
  29
  30 smx_action_t SIMIX_file_read(smx_process_t process, const char* storage, void* ptr, size_t size, size_t nmemb, smx_file_t stream)
  31 {
  32   smx_action_t action;
  33   smx_host_t host = process->smx_host;
  34
  35   /* check if the host is active */
  36   if (surf_workstation_model->extension.
  37       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
  38     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
  39            host->name);
  40   }
  41
  42   action = xbt_mallocator_get(simix_global->action_mallocator);
  43   action->type = SIMIX_ACTION_IO;
  44   action->name = NULL;
  45 #ifdef HAVE_TRACING
  46   action->category = NULL;
  47 #endif
  48
  49   action->io.host = host;
  50   action->io.surf_io = surf_workstation_model->extension.workstation.read(host->host, storage, ptr, size, nmemb, stream->surf_file),
  51
  52   surf_workstation_model->action_data_set(action->io.surf_io, action);
  53   XBT_DEBUG("Create io action %p", action);
  54
  55   return action;
  56 }
  57
  58 //SIMIX FILE WRITE
  59 void SIMIX_pre_file_write(smx_simcall_t simcall)
  60 {
  61   smx_action_t action = SIMIX_file_write(simcall->issuer,
  62       simcall->file_write.storage,
  63       simcall->file_write.ptr,
  64       simcall->file_write.size,
  65       simcall->file_write.nmemb,
  66       simcall->file_write.stream);
  67   xbt_fifo_push(action->simcalls, simcall);
  68   simcall->issuer->waiting_action = action;
  69 }
  70
  71 smx_action_t SIMIX_file_write(smx_process_t process, const char* storage, const void* ptr, size_t size, size_t nmemb, smx_file_t stream)
  72 {
  73   smx_action_t action;
  74   smx_host_t host = process->smx_host;
  75
  76   /* check if the host is active */
  77   if (surf_workstation_model->extension.
  78       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
  79     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
  80            host->name);
  81   }
  82
  83   action = xbt_mallocator_get(simix_global->action_mallocator);
  84   action->type = SIMIX_ACTION_IO;
  85   action->name = NULL;
  86 #ifdef HAVE_TRACING
  87   action->category = NULL;
  88 #endif
  89
  90   action->io.host = host;
  91   action->io.surf_io = surf_workstation_model->extension.workstation.write(host->host, storage, ptr, size, nmemb, stream->surf_file);
  92
  93   surf_workstation_model->action_data_set(action->io.surf_io, action);
  94   XBT_DEBUG("Create io action %p", action);
  95
  96   return action;
  97 }
  98
  99 //SIMIX FILE OPEN
 100 void SIMIX_pre_file_open(smx_simcall_t simcall)
 101 {
 102   smx_action_t action = SIMIX_file_open(simcall->issuer,
 103       simcall->file_open.storage,
 104       simcall->file_open.path,
 105       simcall->file_open.mode);
 106   xbt_fifo_push(action->simcalls, simcall);
 107   simcall->issuer->waiting_action = action;
 108 }
 109
 110 smx_action_t SIMIX_file_open(smx_process_t process ,const char* storage, const char* path, const char* mode)
 111 {
 112   smx_action_t action;
 113   smx_host_t host = process->smx_host;
 114
 115   /* check if the host is active */
 116   if (surf_workstation_model->extension.
 117       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
 118     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
 119            host->name);
 120   }
 121
 122   action = xbt_mallocator_get(simix_global->action_mallocator);
 123   action->type = SIMIX_ACTION_IO;
 124   action->name = NULL;
 125 #ifdef HAVE_TRACING
 126   action->category = NULL;
 127 #endif
 128
 129   action->io.host = host;
 130   action->io.surf_io = surf_workstation_model->extension.workstation.open(host->host, storage, path, mode);
 131
 132   surf_workstation_model->action_data_set(action->io.surf_io, action);
 133   XBT_DEBUG("Create io action %p", action);
 134
 135   return action;
 136 }
 137
 138 //SIMIX FILE CLOSE
 139 void SIMIX_pre_file_close(smx_simcall_t simcall)
 140 {
 141   smx_action_t action = SIMIX_file_close(simcall->issuer,
 142       simcall->file_close.storage,
 143       simcall->file_close.fp);
 144   xbt_fifo_push(action->simcalls, simcall);
 145   simcall->issuer->waiting_action = action;
 146 }
 147
 148 smx_action_t SIMIX_file_close(smx_process_t process ,const char* storage, smx_file_t fp)
 149 {
 150   smx_action_t action;
 151   smx_host_t host = process->smx_host;
 152
 153   /* check if the host is active */
 154   if (surf_workstation_model->extension.
 155       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
 156     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
 157            host->name);
 158   }
 159
 160   action = xbt_mallocator_get(simix_global->action_mallocator);
 161   action->type = SIMIX_ACTION_IO;
 162   action->name = NULL;
 163 #ifdef HAVE_TRACING
 164   action->category = NULL;
 165 #endif
 166
 167   action->io.host = host;
 168   action->io.surf_io = surf_workstation_model->extension.workstation.close(host->host, storage, fp->surf_file);
 169
 170   surf_workstation_model->action_data_set(action->io.surf_io, action);
 171   XBT_DEBUG("Create io action %p", action);
 172
 173   return action;
 174 }
 175
 176 //SIMIX FILE STAT
 177 void SIMIX_pre_file_stat(smx_simcall_t simcall)
 178 {
 179   smx_action_t action = SIMIX_file_stat(simcall->issuer,
 180       simcall->file_stat.storage,
 181       simcall->file_stat.fd,
 182       simcall->file_stat.buf);
 183   xbt_fifo_push(action->simcalls, simcall);
 184   simcall->issuer->waiting_action = action;
 185 }
 186
 187 smx_action_t SIMIX_file_stat(smx_process_t process ,const char* storage, smx_file_t fd, s_file_stat_t buf)
 188 {
 189   smx_action_t action;
 190   smx_host_t host = process->smx_host;
 191   /* check if the host is active */
 192   if (surf_workstation_model->extension.
 193       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
 194     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
 195            host->name);
 196   }
 197
 198   action = xbt_mallocator_get(simix_global->action_mallocator);
 199   action->type = SIMIX_ACTION_IO;
 200   action->name = NULL;
 201 #ifdef HAVE_TRACING
 202   action->category = NULL;
 203 #endif
 204
 205   action->io.host = host;
 206   action->io.surf_io = surf_workstation_model->extension.workstation.stat(host->host, storage, fd->surf_file);
 207
 208   surf_workstation_model->action_data_set(action->io.surf_io, action);
 209   XBT_DEBUG("Create io action %p", action);
 210
 211   return action;
 212 }
 213
 214 void SIMIX_post_io(smx_action_t action)
 215 {
 216   xbt_fifo_item_t i;
 217   smx_simcall_t simcall;
 218
 219   xbt_fifo_foreach(action->simcalls,i,simcall,smx_simcall_t) {
 220     switch (simcall->call) {
 221     case SIMCALL_FILE_OPEN:
 222       simcall->file_open.result = xbt_new(s_smx_file_t,1);
 223       simcall->file_open.result->surf_file = (action->io.surf_io)->file;
 224       break;
 225     case SIMCALL_FILE_CLOSE:
 226       simcall->file_read.result = 0;
 227       break;
 228     case SIMCALL_FILE_WRITE:
 229       simcall->file_write.result = (action->io.surf_io)->cost;
 230       break;
 231     case SIMCALL_FILE_READ:
 232       simcall->file_read.result = (action->io.surf_io)->cost;
 233       break;
 234     case SIMCALL_FILE_STAT:
 235       simcall->file_stat.result = 0;
 236       s_file_stat_t *dst = &(simcall->file_stat.buf);
 237       s_file_stat_t *src = &((action->io.surf_io)->stat);
 238       file_stat_copy(src,dst);
 239       break;
 240     default:
 241       break;
 242     }
 243   }
 244
 245   switch (surf_workstation_model->action_state_get(action->io.surf_io)) {
 246
 247     case SURF_ACTION_FAILED:
 248       action->state = SIMIX_FAILED;
 249       break;
 250
 251     case SURF_ACTION_DONE:
 252       action->state = SIMIX_DONE;
 253       break;
 254
 255     default:
 256       THROW_IMPOSSIBLE;
 257       break;
 258   }
 259
 260   SIMIX_io_finish(action);
 261 }
 262
 263 void SIMIX_io_destroy(smx_action_t action)
 264 {
 265   XBT_DEBUG("Destroy action %p", action);
 266   if (action->io.surf_io)
 267     action->io.surf_io->model_type->action_unref(action->io.surf_io);
 268   xbt_mallocator_release(simix_global->action_mallocator, action);
 269 }
 270
 271 void SIMIX_io_finish(smx_action_t action)
 272 {
 273   xbt_fifo_item_t item;
 274   smx_simcall_t simcall;
 275
 276   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 277
 278     switch (action->state) {
 279
 280       case SIMIX_DONE:
 281         /* do nothing, action done */
 282         break;
 283
 284       case SIMIX_FAILED:
 285         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
 286         break;
 287
 288       case SIMIX_CANCELED:
 289         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 290         break;
 291
 292       default:
 293         xbt_die("Internal error in SIMIX_io_finish: unexpected action state %d",
 294             (int)action->state);
 295     }
 296     simcall->issuer->waiting_action = NULL;
 297     SIMIX_simcall_answer(simcall);
 298   }
 299
 300   /* We no longer need it */
 301   SIMIX_io_destroy(action);
 302 }