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 "src/surf/surf_interface.hpp"
  18 #include "smx_private.h"
  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, sg_host_t host)
  26 {
  27   smx_activity_t synchro = SIMIX_file_read(fd, size, host);
  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, sg_host_t host)
  33 {
  34   /* check if the host is active */
  35   if (host->isOff())
  36     THROWF(host_error, 0, "Host %s failed, you cannot call this function", host->getCname());
  37
  38   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  39   synchro->surf_io                           = file->read(size);
  40
  41   synchro->surf_io->setData(synchro);
  42   XBT_DEBUG("Create io synchro %p", synchro);
  43
  44   return synchro;
  45 }
  46
  47 //SIMIX FILE WRITE
  48 void simcall_HANDLER_file_write(smx_simcall_t simcall, surf_file_t fd, sg_size_t size, sg_host_t host)
  49 {
  50   smx_activity_t synchro = SIMIX_file_write(fd,  size, host);
  51   synchro->simcalls.push_back(simcall);
  52   simcall->issuer->waiting_synchro = synchro;
  53 }
  54
  55 smx_activity_t SIMIX_file_write(surf_file_t file, sg_size_t size, sg_host_t host)
  56 {
  57   if (host->isOff())
  58     THROWF(host_error, 0, "Host %s failed, you cannot call this function", host->getCname());
  59
  60   simgrid::kernel::activity::IoImpl* synchro = new simgrid::kernel::activity::IoImpl();
  61   synchro->surf_io                           = file->write(size);
  62   synchro->surf_io->setData(synchro);
  63   XBT_DEBUG("Create io synchro %p", synchro);
  64
  65   return synchro;
  66 }
  67
  68 void SIMIX_io_destroy(smx_activity_t synchro)
  69 {
  70   simgrid::kernel::activity::IoImplPtr io = boost::static_pointer_cast<simgrid::kernel::activity::IoImpl>(synchro);
  71   XBT_DEBUG("Destroy synchro %p", synchro.get());
  72   if (io->surf_io)
  73     io->surf_io->unref();
  74 }
  75
  76 void SIMIX_io_finish(smx_activity_t synchro)
  77 {
  78   for (smx_simcall_t simcall : synchro->simcalls) {
  79     switch (synchro->state) {
  80       case SIMIX_DONE:
  81         /* do nothing, synchro done */
  82         break;
  83       case SIMIX_FAILED:
  84         SMX_EXCEPTION(simcall->issuer, io_error, 0, "IO failed");
  85         break;
  86       case SIMIX_CANCELED:
  87         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
  88         break;
  89       default:
  90         xbt_die("Internal error in SIMIX_io_finish: unexpected synchro state %d", static_cast<int>(synchro->state));
  91     }
  92
  93     if (simcall->issuer->host->isOff()) {
  94       simcall->issuer->context->iwannadie = 1;
  95     }
  96
  97     simcall->issuer->waiting_synchro = nullptr;
  98     SIMIX_simcall_answer(simcall);
  99   }
 100
 101   /* We no longer need it */
 102   SIMIX_io_destroy(synchro);
 103 }