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   //  TODO in surf model disk???
  50   //  action->io.surf_io = surf_workstation_model->extension.disk.read(host->host, name),
  51   action->io.surf_io = surf_workstation_model->extension.workstation.sleep(host->host, 1.0);
  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.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 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   //  TODO in surf model disk???
  92   //  action->io.surf_io = surf_workstation_model->extension.disk.write(host->host, name),
  93   action->io.surf_io = surf_workstation_model->extension.workstation.sleep(host->host, 2.0);
  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 void SIMIX_post_io(smx_action_t action)
 102 {
 103   switch (surf_workstation_model->action_state_get(action->io.surf_io)) {
 104
 105     case SURF_ACTION_FAILED:
 106       action->state = SIMIX_FAILED;
 107       break;
 108
 109     case SURF_ACTION_DONE:
 110       action->state = SIMIX_DONE;
 111       break;
 112
 113     default:
 114       THROW_IMPOSSIBLE;
 115       break;
 116   }
 117
 118   SIMIX_io_finish(action);
 119 }
 120
 121 void SIMIX_io_destroy(smx_action_t action)
 122 {
 123   XBT_DEBUG("Destroy action %p", action);
 124   if (action->io.surf_io)
 125     action->io.surf_io->model_type->action_unref(action->io.surf_io);
 126   xbt_mallocator_release(simix_global->action_mallocator, action);
 127 }
 128
 129 void SIMIX_io_finish(smx_action_t action)
 130 {
 131   volatile xbt_fifo_item_t item;
 132   smx_simcall_t simcall;
 133
 134   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 135
 136     switch (action->state) {
 137
 138       case SIMIX_DONE:
 139         /* do nothing, action done */
 140         break;
 141
 142       case SIMIX_FAILED:
 143         TRY {
 144           THROWF(io_error, 0, "IO failed");
 145         }
 146         CATCH(simcall->issuer->running_ctx->exception) {
 147           simcall->issuer->doexception = 1;
 148         }
 149       break;
 150
 151       case SIMIX_CANCELED:
 152         TRY {
 153           THROWF(cancel_error, 0, "Canceled");
 154         }
 155         CATCH(simcall->issuer->running_ctx->exception) {
 156           simcall->issuer->doexception = 1;
 157         }
 158         break;
 159
 160       default:
 161         xbt_die("Internal error in SIMIX_io_finish: unexpected action state %d",
 162             action->state);
 163     }
 164     simcall->issuer->waiting_action = NULL;
 165     SIMIX_simcall_answer(simcall);
 166   }
 167
 168   /* We no longer need it */
 169   SIMIX_io_destroy(action);
 170 }