src/simix/smx_io.cpp

   1 /* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "simgrid/s4u/Host.hpp"
   7 #include "xbt/ex.hpp"
   8
   9 #include "smx_private.hpp"
  10 #include "src/kernel/activity/IoImpl.hpp"
  11 #include "src/simix/smx_io_private.hpp"
  12 #include "src/surf/StorageImpl.hpp"
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  15
  16 void simcall_HANDLER_storage_read(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  17 {
  18   smx_activity_t synchro = SIMIX_storage_read(st, size);
  19   synchro->simcalls_.push_back(simcall);
  20   simcall->issuer->waiting_synchro = synchro;
  21 }
  22
  23 smx_activity_t SIMIX_storage_read(surf_storage_t st, sg_size_t size)
  24 {
  25   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  26   synchro->surf_action_                      = st->read(size);
  27
  28   synchro->surf_action_->set_data(synchro);
  29   XBT_DEBUG("Create io synchro %p", synchro);
  30
  31   return synchro;
  32 }
  33
  34 void simcall_HANDLER_storage_write(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  35 {
  36   smx_activity_t synchro = SIMIX_storage_write(st, size);
  37   synchro->simcalls_.push_back(simcall);
  38   simcall->issuer->waiting_synchro = synchro;
  39 }
  40
  41 smx_activity_t SIMIX_storage_write(surf_storage_t st, sg_size_t size)
  42 {
  43   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  44   synchro->surf_action_                      = st->write(size);
  45   synchro->surf_action_->set_data(synchro);
  46   XBT_DEBUG("Create io synchro %p", synchro);
  47
  48   return synchro;
  49 }
  50
  51 void SIMIX_io_destroy(smx_activity_t synchro)
  52 {
  53   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  54   XBT_DEBUG("Destroy synchro %p", synchro.get());
  55   if (io->surf_action_)
  56     io->surf_action_->unref();
  57 }
  58
  59 void SIMIX_io_finish(smx_activity_t synchro)
  60 {
  61   for (smx_simcall_t const& simcall : synchro->simcalls_) {
  62     switch (synchro->state_) {
  63       case SIMIX_DONE:
  64         /* do nothing, synchro done */
  65         break;
  66       case SIMIX_FAILED:
  67         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  68         break;
  69       case SIMIX_CANCELED:
  70         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  71         break;
  72       default:
  73         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state_));
  74     }
  75
  76     if (simcall->issuer->host_->is_off()) {
  77       simcall->issuer->context_->iwannadie = 1;
  78     }
  79
  80     simcall->issuer->waiting_synchro = nullptr;
  81     SIMIX_simcall_answer(simcall);
  82   }
  83
  84   /* We no longer need it */
  85   SIMIX_io_destroy(synchro);
  86 }