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 simgrid::kernel::activity::IoImplPtr SIMIX_io_start(std::string name, sg_size_t size, sg_storage_t storage)
  17 {
  18   /* set surf's action */
  19   simgrid::kernel::resource::Action* surf_action = storage->pimpl_->io_start(size);
  20
  21   simgrid::kernel::activity::IoImplPtr io =
  22       simgrid::kernel::activity::IoImplPtr(new simgrid::kernel::activity::IoImpl(name, surf_action, storage));
  23
  24   XBT_DEBUG("Create IO synchro %p %s", io.get(), name.c_str());
  25   simgrid::kernel::activity::IoImpl::on_creation(io);
  26
  27   return io;
  28 }
  29
  30 void simcall_HANDLER_storage_read(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  31 {
  32   smx_activity_t synchro = SIMIX_storage_read(st, size);
  33   synchro->simcalls_.push_back(simcall);
  34   simcall->issuer->waiting_synchro = synchro;
  35 }
  36
  37 smx_activity_t SIMIX_storage_read(surf_storage_t st, sg_size_t size)
  38 {
  39   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  40   synchro->surf_action_                      = st->read(size);
  41
  42   synchro->surf_action_->set_data(synchro);
  43   XBT_DEBUG("Create io synchro %p", synchro);
  44
  45   return synchro;
  46 }
  47
  48 void simcall_HANDLER_storage_write(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  49 {
  50   smx_activity_t synchro = SIMIX_storage_write(st, size);
  51   synchro->simcalls_.push_back(simcall);
  52   simcall->issuer->waiting_synchro = synchro;
  53 }
  54
  55 smx_activity_t SIMIX_storage_write(surf_storage_t st, sg_size_t size)
  56 {
  57   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  58   synchro->surf_action_                      = st->write(size);
  59   synchro->surf_action_->set_data(synchro);
  60   XBT_DEBUG("Create io synchro %p", synchro);
  61
  62   return synchro;
  63 }
  64
  65 void SIMIX_io_destroy(smx_activity_t synchro)
  66 {
  67   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  68   XBT_DEBUG("Destroy synchro %p", synchro.get());
  69   if (io->surf_action_)
  70     io->surf_action_->unref();
  71 }
  72
  73 void SIMIX_io_finish(smx_activity_t synchro)
  74 {
  75   for (smx_simcall_t const& simcall : synchro->simcalls_) {
  76     switch (synchro->state_) {
  77       case SIMIX_DONE:
  78         /* do nothing, synchro done */
  79         break;
  80       case SIMIX_FAILED:
  81         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  82         break;
  83       case SIMIX_CANCELED:
  84         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  85         break;
  86       default:
  87         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state_));
  88     }
  89
  90     if (simcall->issuer->host_->is_off()) {
  91       simcall->issuer->context_->iwannadie = 1;
  92     }
  93
  94     simcall->issuer->waiting_synchro = nullptr;
  95     SIMIX_simcall_answer(simcall);
  96   }
  97
  98   /* We no longer need it */
  99   SIMIX_io_destroy(synchro);
 100 }