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