src/s4u/s4u_Io.cpp

   1 /* Copyright (c) 2018-2019. 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/Io.hpp"
   7 #include "simgrid/s4u/Storage.hpp"
   8 #include "src/kernel/activity/IoImpl.hpp"
   9 #include "src/simix/smx_io_private.hpp"
  10 #include "xbt/log.h"
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_io, s4u_activity, "S4U asynchronous IOs");
  13
  14 namespace simgrid {
  15 namespace s4u {
  16
  17 Io::Io(sg_storage_t storage, sg_size_t size, OpType type) : Activity(), storage_(storage), size_(size), type_(type)
  18 {
  19   Activity::set_remaining(size_);
  20   pimpl_ = simix::simcall(
  21       [this] { return kernel::activity::IoImplPtr(new kernel::activity::IoImpl(name_, storage_->get_impl())); });
  22 }
  23
  24 Io* Io::start()
  25 {
  26   simix::simcall([this] { static_cast<kernel::activity::IoImpl*>(pimpl_.get())->start(size_, type_); });
  27   state_ = State::STARTED;
  28   return this;
  29 }
  30
  31 Io* Io::cancel()
  32 {
  33   simgrid::simix::simcall([this] { static_cast<kernel::activity::IoImpl*>(pimpl_.get())->cancel(); });
  34   state_ = State::CANCELED;
  35   return this;
  36 }
  37
  38 Io* Io::wait()
  39 {
  40   simcall_io_wait(pimpl_);
  41   state_ = State::FINISHED;
  42   return this;
  43 }
  44
  45 Io* Io::wait_for(double)
  46 {
  47   THROW_UNIMPLEMENTED;
  48   return this;
  49 }
  50
  51 bool Io::test()
  52 {
  53   xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
  54
  55   if (state_ == State::FINISHED)
  56     return true;
  57
  58   if (state_ == State::INITED)
  59     this->start();
  60
  61   THROW_UNIMPLEMENTED;
  62
  63   return false;
  64 }
  65
  66 /** @brief Returns the amount of flops that remain to be done */
  67 double Io::get_remaining()
  68 {
  69   return simgrid::simix::simcall(
  70       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
  71 }
  72
  73 sg_size_t Io::get_performed_ioops()
  74 {
  75   return simgrid::simix::simcall(
  76       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops(); });
  77 }
  78
  79 void intrusive_ptr_release(simgrid::s4u::Io* i)
  80 {
  81   if (i->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
  82     std::atomic_thread_fence(std::memory_order_acquire);
  83     delete i;
  84   }
  85 }
  86
  87 void intrusive_ptr_add_ref(simgrid::s4u::Io* i)
  88 {
  89   i->refcount_.fetch_add(1, std::memory_order_relaxed);
  90 }
  91 } // namespace s4u
  92 } // namespace simgrid