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 <xbt/ex.hpp>
   7 #include <xbt/sysdep.h>
   8 #include <xbt/log.h>
   9
  10 #include "simgrid/s4u/Host.hpp"
  11 #include "simgrid/s4u/Storage.hpp"
  12 #include "smx_private.hpp"
  13 #include "src/simix/smx_io_private.hpp"
  14 #include "src/surf/HostImpl.hpp"
  15 #include "src/surf/StorageImpl.hpp"
  16 #include "src/surf/surf_interface.hpp"
  17 #include "surf/surf.hpp"
  18
  19 #include "src/kernel/activity/SynchroIo.hpp"
  20
  21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  22
  23 void simcall_HANDLER_storage_read(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  24 {
  25   smx_activity_t synchro = SIMIX_storage_read(st, size);
  26   synchro->simcalls.push_back(simcall);
  27   simcall->issuer->waiting_synchro = synchro;
  28 }
  29
  30 smx_activity_t SIMIX_storage_read(surf_storage_t st, sg_size_t size)
  31 {
  32   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  33   synchro->surf_io                           = st->read(size);
  34
  35   synchro->surf_io->set_data(synchro);
  36   XBT_DEBUG("Create io synchro %p", synchro);
  37
  38   return synchro;
  39 }
  40
  41 void simcall_HANDLER_storage_write(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  42 {
  43   smx_activity_t synchro = SIMIX_storage_write(st, size);
  44   synchro->simcalls.push_back(simcall);
  45   simcall->issuer->waiting_synchro = synchro;
  46 }
  47
  48 smx_activity_t SIMIX_storage_write(surf_storage_t st, sg_size_t size)
  49 {
  50   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  51   synchro->surf_io                           = st->write(size);
  52   synchro->surf_io->set_data(synchro);
  53   XBT_DEBUG("Create io synchro %p", synchro);
  54
  55   return synchro;
  56 }
  57
  58 void SIMIX_io_destroy(smx_activity_t synchro)
  59 {
  60   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  61   XBT_DEBUG("Destroy synchro %p", synchro.get());
  62   if (io->surf_io)
  63     io->surf_io->unref();
  64 }
  65
  66 void SIMIX_io_finish(smx_activity_t synchro)
  67 {
  68   for (smx_simcall_t const& simcall : synchro->simcalls) {
  69     switch (synchro->state) {
  70       case SIMIX_DONE:
  71         /* do nothing, synchro done */
  72         break;
  73       case SIMIX_FAILED:
  74         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  75         break;
  76       case SIMIX_CANCELED:
  77         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  78         break;
  79       default:
  80         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state));
  81     }
  82
  83     if (simcall->issuer->host->isOff()) {
  84       simcall->issuer->context->iwannadie = 1;
  85     }
  86
  87     simcall->issuer->waiting_synchro = nullptr;
  88     SIMIX_simcall_answer(simcall);
  89   }
  90
  91   /* We no longer need it */
  92   SIMIX_io_destroy(synchro);
  93 }