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.h"
  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 //SIMIX FILE READ
  25 void simcall_HANDLER_file_read(smx_simcall_t simcall, surf_file_t fd, sg_size_t size)
  26 {
  27   smx_activity_t synchro = SIMIX_file_read(fd, size);
  28   synchro->simcalls.push_back(simcall);
  29   simcall->issuer->waiting_synchro = synchro;
  30 }
  31
  32 smx_activity_t SIMIX_file_read(surf_file_t file, sg_size_t size)
  33 {
  34   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  35   synchro->surf_io                           = file->read(size);
  36
  37   synchro->surf_io->setData(synchro);
  38   XBT_DEBUG("Create io synchro %p", synchro);
  39
  40   return synchro;
  41 }
  42
  43 //SIMIX FILE WRITE
  44 void simcall_HANDLER_file_write(smx_simcall_t simcall, surf_file_t fd, sg_size_t size)
  45 {
  46   smx_activity_t synchro = SIMIX_file_write(fd, size);
  47   synchro->simcalls.push_back(simcall);
  48   simcall->issuer->waiting_synchro = synchro;
  49 }
  50
  51 smx_activity_t SIMIX_file_write(surf_file_t file, sg_size_t size)
  52 {
  53   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  54   synchro->surf_io                           = file->write(size);
  55   synchro->surf_io->setData(synchro);
  56   XBT_DEBUG("Create io synchro %p", synchro);
  57
  58   return synchro;
  59 }
  60
  61 void SIMIX_io_destroy(smx_activity_t synchro)
  62 {
  63   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  64   XBT_DEBUG("Destroy synchro %p", synchro.get());
  65   if (io->surf_io)
  66     io->surf_io->unref();
  67 }
  68
  69 void SIMIX_io_finish(smx_activity_t synchro)
  70 {
  71   for (smx_simcall_t const& simcall : synchro->simcalls) {
  72     switch (synchro->state) {
  73       case SIMIX_DONE:
  74         /* do nothing, synchro done */
  75         break;
  76       case SIMIX_FAILED:
  77         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  78         break;
  79       case SIMIX_CANCELED:
  80         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  81         break;
  82       default:
  83         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state));
  84     }
  85
  86     if (simcall->issuer->host->isOff()) {
  87       simcall->issuer->context->iwannadie = 1;
  88     }
  89
  90     simcall->issuer->waiting_synchro = nullptr;
  91     SIMIX_simcall_answer(simcall);
  92   }
  93
  94   /* We no longer need it */
  95   SIMIX_io_destroy(synchro);
  96 }