move the models to the right directory (empty src/surf a bit)

[simgrid.git] / src / kernel / resource / models / network_constant.cpp

diff --git a/src/kernel/resource/models/network_constant.cpp b/src/kernel/resource/models/network_constant.cpp
new file mode 100644 (file)
index 0000000..33c0367
--- /dev/null
+++ b/src/kernel/resource/models/network_constant.cpp
@@ -0,0 +1,99 @@
+/* Copyright (c) 2013-2023. 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. */
+
+#include <simgrid/kernel/routing/NetZoneImpl.hpp>
+#include <simgrid/s4u/Engine.hpp>
+
+#include "src/kernel/EngineImpl.hpp"
+#include "src/kernel/resource/models/network_constant.hpp"
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_network);
+
+/*********
+ * Model *
+ *********/
+SIMGRID_REGISTER_NETWORK_MODEL(
+    Constant,
+    "Simplistic network model where all communication take a constant time (one second). This model "
+    "provides the lowest realism, but is (marginally) faster. It is mostly useful when studying theoretical "
+    "distributed algorithms where the network is usually abstracted away.",
+    []() {
+      auto net_model = std::make_shared<simgrid::kernel::resource::NetworkConstantModel>("Network_Constant");
+      auto* engine   = simgrid::kernel::EngineImpl::get_instance();
+      engine->add_model(net_model);
+      engine->get_netzone_root()->set_network_model(net_model);
+    });
+
+namespace simgrid::kernel::resource {
+
+StandardLinkImpl* NetworkConstantModel::create_link(const std::string& name, const std::vector<double>& /*bandwidth*/)
+{
+  xbt_die("Refusing to create the link %s: there is no link in the Constant network model. "
+          "Please remove any link from your platform (and switch to routing='None')",
+          name.c_str());
+  return nullptr;
+}
+
+StandardLinkImpl* NetworkConstantModel::create_wifi_link(const std::string& name, const std::vector<double>& bandwidths)
+{
+  return create_link(name, bandwidths);
+}
+
+double NetworkConstantModel::next_occurring_event(double /*now*/)
+{
+  double min = -1.0;
+  for (Action const& action : *get_started_action_set()) {
+    const auto& net_action = static_cast<const NetworkConstantAction&>(action);
+    if (net_action.latency_ > 0 && (min < 0 || net_action.latency_ < min))
+      min = net_action.latency_;
+  }
+  return min;
+}
+
+void NetworkConstantModel::update_actions_state(double /*now*/, double delta)
+{
+  for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
+    auto& action = static_cast<NetworkConstantAction&>(*it);
+    ++it; // increment iterator here since the following calls to action.finish() may invalidate it
+    if (action.latency_ > 0) {
+      if (action.latency_ > delta) {
+        double_update(&action.latency_, delta, sg_precision_timing);
+      } else {
+        action.latency_ = 0.0;
+      }
+    }
+    action.update_remains(action.get_cost() * delta / get_latency_factor());
+    action.update_max_duration(delta);
+
+    if ((action.get_remains_no_update() <= 0) ||
+        ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
+      action.finish(Action::State::FINISHED);
+    }
+  }
+}
+
+Action* NetworkConstantModel::communicate(s4u::Host* src, s4u::Host* dst, double size, double /*rate*/,
+                                          bool /*streamed*/)
+{
+  return (new NetworkConstantAction(this, *src, *dst, size));
+}
+
+/**********
+ * Action *
+ **********/
+NetworkConstantAction::NetworkConstantAction(NetworkConstantModel* model_, s4u::Host& src, s4u::Host& dst, double size)
+    : NetworkAction(model_, src, dst, size, false)
+{
+  latency_ = model_->get_latency_factor();
+  if (latency_ <= 0.0)
+    set_state(Action::State::FINISHED);
+}
+
+void NetworkConstantAction::update_remains_lazy(double /*now*/)
+{
+  THROW_IMPOSSIBLE;
+}
+
+} // namespace simgrid::kernel::resource