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