src/s4u/s4u_Io.cpp

   1 /* Copyright (c) 2018-2021. 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/Disk.hpp>
   7 #include <simgrid/s4u/Io.hpp>
   8 #include <xbt/log.h>
   9
  10 #include "src/kernel/activity/IoImpl.hpp"
  11 #include "src/kernel/actor/ActorImpl.hpp"
  12 #include "src/kernel/actor/SimcallObserver.hpp"
  13
  14 namespace simgrid {
  15 namespace s4u {
  16 xbt::signal<void(Io const&)> Io::on_start;
  17 xbt::signal<void(Io const&)> Io::on_completion;
  18
  19 Io::Io(kernel::activity::IoImplPtr pimpl)
  20 {
  21   pimpl_ = pimpl;
  22 }
  23
  24 void Io::complete(Activity::State state)
  25 {
  26   Activity::complete(state);
  27   on_completion(*this);
  28 }
  29
  30 IoPtr Io::init()
  31 {
  32   auto pimpl = kernel::activity::IoImplPtr(new kernel::activity::IoImpl());
  33   return IoPtr(pimpl->get_iface());
  34 }
  35
  36 Io* Io::start()
  37 {
  38   kernel::actor::simcall(
  39       [this] { (*boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)).set_name(get_name()).start(); });
  40
  41   if (suspended_)
  42     pimpl_->suspend();
  43
  44   state_ = State::STARTED;
  45   on_start(*this);
  46   return this;
  47 }
  48
  49 ssize_t Io::wait_any_for(const std::vector<IoPtr>& ios, double timeout)
  50 {
  51   std::vector<kernel::activity::IoImpl*> rios(ios.size());
  52   std::transform(begin(ios), end(ios), begin(rios),
  53                  [](const IoPtr& io) { return static_cast<kernel::activity::IoImpl*>(io->pimpl_.get()); });
  54
  55   kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
  56   kernel::actor::IoWaitanySimcall observer{issuer, rios, timeout};
  57   ssize_t changed_pos = kernel::actor::simcall_blocking(
  58       [&observer] {
  59         kernel::activity::IoImpl::wait_any_for(observer.get_issuer(), observer.get_ios(), observer.get_timeout());
  60       },
  61       &observer);
  62   if (changed_pos != -1)
  63     ios.at(changed_pos)->complete(State::FINISHED);
  64   return changed_pos;
  65 }
  66
  67 IoPtr Io::set_disk(const_sg_disk_t disk)
  68 {
  69   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set disk once the Io is started");
  70
  71   kernel::actor::simcall(
  72       [this, disk] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_disk(disk->get_impl()); });
  73
  74   // Setting the disk may allow to start the activity, let's try
  75   if (state_ == State::STARTING)
  76     vetoable_start();
  77
  78  return this;
  79 }
  80
  81 IoPtr Io::set_size(sg_size_t size)
  82 {
  83   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  84   kernel::actor::simcall(
  85       [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
  86   Activity::set_remaining(size);
  87   return this;
  88 }
  89
  90 IoPtr Io::set_op_type(OpType type)
  91 {
  92   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  93   kernel::actor::simcall(
  94       [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
  95   return this;
  96 }
  97
  98 /** @brief Returns the amount of flops that remain to be done */
  99 double Io::get_remaining() const
 100 {
 101   return kernel::actor::simcall(
 102       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
 103 }
 104
 105 sg_size_t Io::get_performed_ioops() const
 106 {
 107   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops();
 108 }
 109
 110 bool Io::is_assigned() const
 111 {
 112   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
 113 }
 114
 115 } // namespace s4u
 116 } // namespace simgrid