src/simix/smx_io.cpp

   1 /* Copyright (c) 2007-2017. 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 "src/surf/FileImpl.hpp"
  13 #include "src/surf/HostImpl.hpp"
  14 #include "src/surf/StorageImpl.hpp"
  15 #include "surf/surf.hpp"
  16
  17 #include "smx_private.hpp"
  18 #include "src/surf/surf_interface.hpp"
  19
  20 #include "src/kernel/activity/SynchroIo.hpp"
  21
  22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  23
  24 void simcall_HANDLER_storage_read(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  25 {
  26   smx_activity_t synchro = SIMIX_storage_read(st, size);
  27   synchro->simcalls.push_back(simcall);
  28   simcall->issuer->waiting_synchro = synchro;
  29 }
  30
  31 smx_activity_t SIMIX_storage_read(surf_storage_t st, sg_size_t size)
  32 {
  33   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  34   synchro->surf_io                           = st->read(size);
  35
  36   synchro->surf_io->setData(synchro);
  37   XBT_DEBUG("Create io synchro %p", synchro);
  38
  39   return synchro;
  40 }
  41
  42 void simcall_HANDLER_storage_write(smx_simcall_t simcall, surf_storage_t st, sg_size_t size)
  43 {
  44   smx_activity_t synchro = SIMIX_storage_write(st, size);
  45   synchro->simcalls.push_back(simcall);
  46   simcall->issuer->waiting_synchro = synchro;
  47 }
  48
  49 smx_activity_t SIMIX_storage_write(surf_storage_t st, sg_size_t size)
  50 {
  51   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  52   synchro->surf_io                           = st->write(size);
  53   synchro->surf_io->setData(synchro);
  54   XBT_DEBUG("Create io synchro %p", synchro);
  55
  56   return synchro;
  57 }
  58
  59 void SIMIX_io_destroy(smx_activity_t synchro)
  60 {
  61   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  62   XBT_DEBUG("Destroy synchro %p", synchro.get());
  63   if (io->surf_io)
  64     io->surf_io->unref();
  65 }
  66
  67 void SIMIX_io_finish(smx_activity_t synchro)
  68 {
  69   for (smx_simcall_t const& simcall : synchro->simcalls) {
  70     switch (synchro->state) {
  71       case SIMIX_DONE:
  72         /* do nothing, synchro done */
  73         break;
  74       case SIMIX_FAILED:
  75         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  76         break;
  77       case SIMIX_CANCELED:
  78         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  79         break;
  80       default:
  81         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state));
  82     }
  83
  84     if (simcall->issuer->host->isOff()) {
  85       simcall->issuer->context->iwannadie = 1;
  86     }
  87
  88     simcall->issuer->waiting_synchro = nullptr;
  89     SIMIX_simcall_answer(simcall);
  90   }
  91
  92   /* We no longer need it */
  93   SIMIX_io_destroy(synchro);
  94 }