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) : storage_(storage), size_(size), type_(type)
  17 {
  18   Activity::set_remaining(size_);
  19   pimpl_ = kernel::activity::IoImplPtr(new kernel::activity::IoImpl());
  20 }
  21
  22 Io* Io::start()
  23 {
  24   simix::simcall([this] {
  25     (*boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_))
  26         .set_name(name_)
  27         .set_storage(storage_->get_impl())
  28         .set_size(size_)
  29         .set_type(type_)
  30         .start();
  31   });
  32   state_ = State::STARTED;
  33   return this;
  34 }
  35
  36 Io* Io::cancel()
  37 {
  38   simgrid::simix::simcall([this] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->cancel(); });
  39   state_ = State::CANCELED;
  40   return this;
  41 }
  42
  43 Io* Io::wait()
  44 {
  45   simcall_io_wait(pimpl_);
  46   state_ = State::FINISHED;
  47   return this;
  48 }
  49
  50 Io* Io::wait_for(double)
  51 {
  52   THROW_UNIMPLEMENTED;
  53 }
  54
  55 bool Io::test()
  56 {
  57   xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
  58
  59   if (state_ == State::FINISHED)
  60     return true;
  61
  62   if (state_ == State::INITED)
  63     this->start();
  64
  65   THROW_UNIMPLEMENTED;
  66
  67   // return false
  68 }
  69
  70 /** @brief Returns the amount of flops that remain to be done */
  71 double Io::get_remaining()
  72 {
  73   return simix::simcall(
  74       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
  75 }
  76
  77 sg_size_t Io::get_performed_ioops()
  78 {
  79   return simix::simcall(
  80       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops(); });
  81 }
  82
  83 void intrusive_ptr_release(simgrid::s4u::Io* i)
  84 {
  85   if (i->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
  86     std::atomic_thread_fence(std::memory_order_acquire);
  87     delete i;
  88   }
  89 }
  90
  91 void intrusive_ptr_add_ref(simgrid::s4u::Io* i)
  92 {
  93   i->refcount_.fetch_add(1, std::memory_order_relaxed);
  94 }
  95 } // namespace s4u
  96 } // namespace simgrid