X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/206daeb1d282a6ec007938eb8755aed5f0ab91b4..0450cc3993fd6914ee4c9c47ee8261a250b58cd7:/src/s4u/s4u_Io.cpp

diff --git a/src/s4u/s4u_Io.cpp b/src/s4u/s4u_Io.cpp
index 906b0bee2d..191abc17ad 100644
--- a/src/s4u/s4u_Io.cpp
+++ b/src/s4u/s4u_Io.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2018-2022. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2018-2023. 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. */
@@ -11,6 +11,8 @@
 #include "src/kernel/actor/ActorImpl.hpp"
 #include "src/kernel/actor/SimcallObserver.hpp"
 
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_io, s4u_activity, "S4U asynchronous I/Os");
+
 namespace simgrid::s4u {
 xbt::signal<void(Io const&)> Io::on_start;
 
@@ -25,7 +27,61 @@ IoPtr Io::init()
   return IoPtr(static_cast<Io*>(pimpl->get_iface()));
 }
 
-Io* Io::start()
+IoPtr Io::streamto_init(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk)
+{
+  auto res = Io::init()->set_source(from, from_disk)->set_destination(to, to_disk);
+  res->set_state(State::STARTING);
+  return res;
+}
+
+IoPtr Io::streamto_async(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk,
+                         uint64_t simulated_size_in_bytes)
+{
+  return Io::init()->set_size(simulated_size_in_bytes)->set_source(from, from_disk)->set_destination(to, to_disk);
+}
+
+void Io::streamto(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk, uint64_t simulated_size_in_bytes)
+{
+  streamto_async(from, from_disk, to, to_disk, simulated_size_in_bytes)->wait();
+}
+
+IoPtr Io::set_source(Host* from, const Disk* from_disk)
+{
+  xbt_assert(state_ == State::INITED || state_ == State::STARTING,
+             "Cannot change the source of an IO stream once it's started (state: %s)", to_c_str(state_));
+  kernel::actor::simcall_object_access(pimpl_.get(), [this, from, from_disk] {
+    boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_host(from);
+    if (from_disk != nullptr)
+      boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_disk(from_disk->get_impl());
+  });
+  // Setting 'source' may allow to start the activity, let's try
+  if (state_ == State::STARTING && remains_ <= 0)
+    XBT_DEBUG("This IO has a size of 0 byte. It cannot start yet");
+  else
+    start();
+
+  return this;
+}
+
+IoPtr Io::set_destination(Host* to, const Disk* to_disk)
+{
+  xbt_assert(state_ == State::INITED || state_ == State::STARTING,
+             "Cannot change the source of an IO stream once it's started (state: %s)", to_c_str(state_));
+  kernel::actor::simcall_object_access(pimpl_.get(), [this, to, to_disk] {
+    boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_dst_host(to);
+    if (to_disk != nullptr)
+      boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_dst_disk(to_disk->get_impl());
+  });
+  // Setting 'destination' may allow to start the activity, let's try
+  if (state_ == State::STARTING && remains_ <= 0)
+    XBT_DEBUG("This IO has a size of 0 byte. It cannot start yet");
+  else
+    start();
+
+  return this;
+}
+
+Io* Io::do_start()
 {
   kernel::actor::simcall_answered(
       [this] { (*boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)).set_name(get_name()).start(); });
@@ -55,7 +111,7 @@ IoPtr Io::set_disk(const_sg_disk_t disk)
 
   // Setting the disk may allow to start the activity, let's try
   if (state_ == State::STARTING)
-    vetoable_start();
+    start();
 
  return this;
 }
@@ -64,7 +120,7 @@ IoPtr Io::set_priority(double priority)
 {
   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
              "Cannot change the priority of an io after its start");
-  kernel::actor::simcall_answered([this, priority] {
+  kernel::actor::simcall_object_access(pimpl_.get(), [this, priority] {
     boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_sharing_penalty(1. / priority);
   });
   return this;
@@ -73,8 +129,8 @@ IoPtr Io::set_priority(double priority)
 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_answered(
-      [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
+  kernel::actor::simcall_object_access(
+      pimpl_.get(), [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
   set_remaining(size);
   return this;
 }
@@ -82,8 +138,8 @@ IoPtr Io::set_size(sg_size_t size)
 IoPtr Io::set_op_type(OpType type)
 {
   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
-  kernel::actor::simcall_answered(
-      [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
+  kernel::actor::simcall_object_access(
+      pimpl_.get(), [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
   return this;
 }
 
@@ -98,8 +154,8 @@ IoPtr Io::update_priority(double priority)
 /** @brief Returns the amount of flops that remain to be done */
 double Io::get_remaining() const
 {
-  return kernel::actor::simcall_answered(
-      [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
+  return kernel::actor::simcall_object_access(
+      pimpl_.get(), [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
 }
 
 sg_size_t Io::get_performed_ioops() const
@@ -109,7 +165,11 @@ sg_size_t Io::get_performed_ioops() const
 
 bool Io::is_assigned() const
 {
-  return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
+  if (boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_host() == nullptr) {
+    return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
+  } else {
+    return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_dst_host() != nullptr;
+  }
 }
 
 } // namespace simgrid::s4u