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 "simgrid/s4u/Io.hpp"
   8 #include "xbt/ex.hpp"
   9
  10 #include "smx_private.hpp"
  11 #include "src/kernel/activity/IoImpl.hpp"
  12 #include "src/simix/smx_io_private.hpp"
  13 #include "src/surf/StorageImpl.hpp"
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  16
  17 simgrid::kernel::activity::IoImplPtr SIMIX_io_start(std::string name, sg_size_t size, sg_storage_t storage,
  18                                                     simgrid::s4u::Io::OpType type)
  19 {
  20   /* set surf's action */
  21   simgrid::kernel::resource::Action* surf_action = storage->get_impl()->io_start(size, type);
  22
  23   simgrid::kernel::activity::IoImplPtr io =
  24       simgrid::kernel::activity::IoImplPtr(new simgrid::kernel::activity::IoImpl(name, surf_action, storage));
  25
  26   XBT_DEBUG("Create IO synchro %p %s", io.get(), name.c_str());
  27   simgrid::kernel::activity::IoImpl::on_creation(io);
  28
  29   return io;
  30 }
  31
  32 void simcall_HANDLER_storage_read(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  33 {
  34   smx_activity_t synchro = SIMIX_storage_read(st, size);
  35   synchro->simcalls_.push_back(simcall);
  36   simcall->issuer->waiting_synchro = synchro;
  37 }
  38
  39 smx_activity_t SIMIX_storage_read(surf_storage_t st, sg_size_t size)
  40 {
  41   //  simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  42   //  synchro->surf_action_                      = st->read(size);
  43   //
  44   //  synchro->surf_action_->set_data(synchro);
  45   //  XBT_DEBUG("Create io synchro %p", synchro);
  46   //
  47   //  return synchro;
  48   return nullptr;
  49 }
  50
  51 void simcall_HANDLER_storage_write(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  52 {
  53   smx_activity_t synchro = SIMIX_storage_write(st, size);
  54   synchro->simcalls_.push_back(simcall);
  55   simcall->issuer->waiting_synchro = synchro;
  56 }
  57
  58 smx_activity_t SIMIX_storage_write(surf_storage_t st, sg_size_t size)
  59 {
  60   //  simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  61   //  synchro->surf_action_                      = st->write(size);
  62   //  synchro->surf_action_->set_data(synchro);
  63   //  XBT_DEBUG("Create io synchro %p", synchro);
  64   //
  65   //  return synchro;
  66   return nullptr;
  67 }
  68
  69 void SIMIX_io_destroy(smx_activity_t synchro)
  70 {
  71   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  72   XBT_DEBUG("Destroy synchro %p", synchro.get());
  73   if (io->surf_action_)
  74     io->surf_action_->unref();
  75 }
  76
  77 void SIMIX_io_finish(smx_activity_t synchro)
  78 {
  79   for (smx_simcall_t const& simcall : synchro->simcalls_) {
  80     switch (synchro->state_) {
  81       case SIMIX_DONE:
  82         /* do nothing, synchro done */
  83         break;
  84       case SIMIX_FAILED:
  85         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  86         break;
  87       case SIMIX_CANCELED:
  88         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  89         break;
  90       default:
  91         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state_));
  92     }
  93
  94     if (simcall->issuer->host_->is_off()) {
  95       simcall->issuer->context_->iwannadie = 1;
  96     }
  97
  98     simcall->issuer->waiting_synchro = nullptr;
  99     SIMIX_simcall_answer(simcall);
 100   }
 101
 102   /* We no longer need it */
 103   SIMIX_io_destroy(synchro);
 104 }