X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/239a6c2b5cf6df25b93d95b5df30fb5fbacbfbcd..59251ff676c562b79573e3561166e4351e4ad11e:/src/s4u/s4u_Io.cpp

diff --git a/src/s4u/s4u_Io.cpp b/src/s4u/s4u_Io.cpp
index 52f55b4322..f0183d2d34 100644
--- a/src/s4u/s4u_Io.cpp
+++ b/src/s4u/s4u_Io.cpp
@@ -1,91 +1,116 @@
-/* Copyright (c) 2018-2019. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2018-2021. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#include "simgrid/s4u/Io.hpp"
-#include "simgrid/s4u/Storage.hpp"
-#include "src/kernel/activity/IoImpl.hpp"
-#include "xbt/log.h"
+#include <simgrid/s4u/Disk.hpp>
+#include <simgrid/s4u/Io.hpp>
+#include <xbt/log.h>
 
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_io, s4u_activity, "S4U asynchronous IOs");
+#include "src/kernel/activity/IoImpl.hpp"
+#include "src/kernel/actor/ActorImpl.hpp"
+#include "src/kernel/actor/SimcallObserver.hpp"
 
 namespace simgrid {
 namespace s4u {
+xbt::signal<void(Io const&)> Io::on_start;
+xbt::signal<void(Io const&)> Io::on_completion;
 
-Io::Io(sg_storage_t storage, sg_size_t size, OpType type) : Activity(), storage_(storage), size_(size), type_(type)
+Io::Io(kernel::activity::IoImplPtr pimpl)
 {
-  Activity::set_remaining(size_);
-  pimpl_ = simix::simcall(
-      [this] { return kernel::activity::IoImplPtr(new kernel::activity::IoImpl(name_, storage_->get_impl())); });
+  pimpl_ = pimpl;
 }
 
-Io* Io::start()
+void Io::complete(Activity::State state)
 {
-  simix::simcall([this] { static_cast<kernel::activity::IoImpl*>(pimpl_.get())->start(size_, type_); });
-  state_ = State::STARTED;
-  return this;
+  Activity::complete(state);
+  on_completion(*this);
 }
 
-Io* Io::cancel()
+IoPtr Io::init()
 {
-  simgrid::simix::simcall([this] { static_cast<kernel::activity::IoImpl*>(pimpl_.get())->cancel(); });
-  state_ = State::CANCELED;
-  return this;
+  auto pimpl = kernel::activity::IoImplPtr(new kernel::activity::IoImpl());
+  return IoPtr(pimpl->get_iface());
 }
 
-Io* Io::wait()
+Io* Io::start()
 {
-  simcall_io_wait(pimpl_);
-  state_ = State::FINISHED;
+  kernel::actor::simcall(
+      [this] { (*boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)).set_name(get_name()).start(); });
+
+  if (suspended_)
+    pimpl_->suspend();
+
+  state_ = State::STARTED;
+  on_start(*this);
   return this;
 }
 
-Io* Io::wait_for(double)
+ssize_t Io::wait_any_for(const std::vector<IoPtr>& ios, double timeout)
 {
-  THROW_UNIMPLEMENTED;
-  return this;
+  std::vector<kernel::activity::IoImpl*> rios(ios.size());
+  std::transform(begin(ios), end(ios), begin(rios),
+                 [](const IoPtr& io) { return static_cast<kernel::activity::IoImpl*>(io->pimpl_.get()); });
+
+  kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
+  kernel::actor::IoWaitanySimcall observer{issuer, rios, timeout};
+  ssize_t changed_pos = kernel::actor::simcall_blocking(
+      [&observer] {
+        kernel::activity::IoImpl::wait_any_for(observer.get_issuer(), observer.get_ios(), observer.get_timeout());
+      },
+      &observer);
+  if (changed_pos != -1)
+    ios.at(changed_pos)->complete(State::FINISHED);
+  return changed_pos;
 }
 
-bool Io::test()
+IoPtr Io::set_disk(const_sg_disk_t disk)
 {
-  xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
+  xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set disk once the Io is started");
 
-  if (state_ == State::FINISHED)
-    return true;
+  kernel::actor::simcall(
+      [this, disk] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_disk(disk->get_impl()); });
 
-  if (state_ == State::INITED)
-    this->start();
+  // Setting the disk may allow to start the activity, let's try
+  if (state_ == State::STARTING)
+    vetoable_start();
 
-  THROW_UNIMPLEMENTED;
+ return this;
+}
 
-  return false;
+IoPtr Io::set_size(sg_size_t size)
+{
+  xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
+  kernel::actor::simcall(
+      [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
+  Activity::set_remaining(size);
+  return this;
 }
 
-/** @brief Returns the amount of flops that remain to be done */
-double Io::get_remaining()
+IoPtr Io::set_op_type(OpType type)
 {
-  return simgrid::simix::simcall(
-      [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
+  xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
+  kernel::actor::simcall(
+      [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
+  return this;
 }
 
-sg_size_t Io::get_performed_ioops()
+/** @brief Returns the amount of flops that remain to be done */
+double Io::get_remaining() const
 {
-  return simgrid::simix::simcall(
-      [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops(); });
+  return kernel::actor::simcall(
+      [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
 }
 
-void intrusive_ptr_release(simgrid::s4u::Io* i)
+sg_size_t Io::get_performed_ioops() const
 {
-  if (i->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
-    std::atomic_thread_fence(std::memory_order_acquire);
-    delete i;
-  }
+  return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops();
 }
 
-void intrusive_ptr_add_ref(simgrid::s4u::Io* i)
+bool Io::is_assigned() const
 {
-  i->refcount_.fetch_add(1, std::memory_order_relaxed);
+  return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
 }
+
 } // namespace s4u
 } // namespace simgrid