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