X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/5eeb3c843b60e9ba5e1a952ffe83df2a4d8f5fa0..HEAD:/src/s4u/s4u_Engine.cpp

diff --git a/src/s4u/s4u_Engine.cpp b/src/s4u/s4u_Engine.cpp
index 3f8d5677e8..094e8311d1 100644
--- a/src/s4u/s4u_Engine.cpp
+++ b/src/s4u/s4u_Engine.cpp
@@ -1,312 +1,517 @@
 /* s4u::Engine Simulation Engine and global functions. */
 
-/* Copyright (c) 2006-2018. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2006-2023. 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 "mc/mc.h"
-#include "simgrid/kernel/routing/NetPoint.hpp"
-#include "simgrid/kernel/routing/NetZoneImpl.hpp"
-#include "simgrid/s4u/Engine.hpp"
-#include "simgrid/s4u/Host.hpp"
-#include "simgrid/s4u/Mailbox.hpp"
-#include "simgrid/s4u/NetZone.hpp"
-#include "simgrid/s4u/Storage.hpp"
-#include "simgrid/simix.h"
-#include "src/simix/smx_private.hpp" // For access to simix_global->process_list
+#include <simgrid/kernel/routing/NetPoint.hpp>
+#include <simgrid/modelchecker.h>
+#include <simgrid/s4u/Engine.hpp>
+
 #include "src/instr/instr_private.hpp"
 #include "src/kernel/EngineImpl.hpp"
-#include "src/surf/network_interface.hpp"
-#include "surf/surf.hpp" // routing_platf. FIXME:KILLME. SOON
-
+#include "src/kernel/resource/HostImpl.hpp"
+#include "src/kernel/resource/NetworkModel.hpp"
+#include "src/kernel/resource/SplitDuplexLinkImpl.hpp"
+#include "src/kernel/resource/StandardLinkImpl.hpp"
+#include "src/mc/mc.h"
+#include "src/mc/mc_replay.hpp"
+#include "xbt/config.hpp"
+
+#include <algorithm>
 #include <string>
 
-XBT_LOG_NEW_CATEGORY(s4u, "Log channels of the S4U (Simgrid for you) interface");
+XBT_LOG_NEW_CATEGORY(s4u, "Log channels of the S4U (SimGrid for you) interface");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_engine, s4u, "Logging specific to S4U (engine)");
 
-namespace simgrid {
-namespace s4u {
-xbt::signal<void()> on_platform_creation;
-xbt::signal<void()> on_platform_created;
-xbt::signal<void()> on_simulation_end;
-xbt::signal<void(double)> on_time_advance;
-xbt::signal<void(void)> on_deadlock;
+static simgrid::kernel::actor::ActorCode maestro_code;
 
-Engine* Engine::instance_ = nullptr; /* That singleton is awful, but I don't see no other solution right now. */
+namespace simgrid::s4u {
+xbt::signal<void()> Engine::on_platform_creation;
+xbt::signal<void()> Engine::on_platform_created;
+xbt::signal<void()> Engine::on_simulation_start;
+xbt::signal<void()> Engine::on_simulation_end;
+xbt::signal<void(double)> Engine::on_time_advance;
+xbt::signal<void(void)> Engine::on_deadlock;
 
-Engine::Engine(int* argc, char** argv)
+Engine* Engine::instance_ = nullptr; /* This singleton is awful, but I don't see no other solution right now. */
+
+void Engine::initialize(int* argc, char** argv)
 {
-  xbt_assert(s4u::Engine::instance_ == nullptr,
-             "It is currently forbidden to create more than one instance of s4u::Engine");
-  TRACE_global_init();
-  SIMIX_global_init(argc, argv);
+  xbt_assert(Engine::instance_ == nullptr, "It is currently forbidden to create more than one instance of s4u::Engine");
+  Engine::instance_ = this;
+  instr::init();
+  pimpl_->initialize(argc, argv);
+  // Either create a new context with maestro or create
+  // a context object with the current context maestro):
+  kernel::actor::create_maestro(maestro_code);
+}
+
+Engine::Engine(std::string name) : pimpl_(new kernel::EngineImpl())
+{
+  int argc   = 1;
+  char* argv = &name[0];
+  initialize(&argc, &argv);
+}
 
-  pimpl                  = new kernel::EngineImpl();
-  s4u::Engine::instance_ = this;
+Engine::Engine(int* argc, char** argv) : pimpl_(new kernel::EngineImpl())
+{
+  initialize(argc, argv);
 }
 
 Engine::~Engine()
 {
-  delete pimpl;
-  s4u::Engine::instance_ = nullptr;
+  kernel::EngineImpl::shutdown();
+  Engine::instance_ = nullptr;
 }
 
 /** @brief Retrieve the engine singleton */
 Engine* Engine::get_instance()
 {
-  if (s4u::Engine::instance_ == nullptr)
-    return new Engine(0, nullptr);
-  else
-    return s4u::Engine::instance_;
+  int argc   = 0;
+  char* argv = nullptr;
+  return get_instance(&argc, &argv);
 }
-
-void Engine::shutdown()
+Engine* Engine::get_instance(int* argc, char** argv)
 {
-  delete s4u::Engine::instance_;
-  s4u::Engine::instance_ = nullptr;
+  if (Engine::instance_ == nullptr) {
+    const auto* e = new Engine(argc, argv);
+    xbt_assert(Engine::instance_ == e);
+  }
+  return Engine::instance_;
 }
-
-double Engine::get_clock()
+const std::vector<std::string>& Engine::get_cmdline() const
 {
-  return SIMIX_get_clock();
+  return pimpl_->get_cmdline();
 }
 
-void Engine::load_platform(std::string platf)
+double Engine::get_clock()
 {
-  SIMIX_create_environment(platf);
+  if (MC_is_active() || MC_record_replay_is_active()) {
+    return MC_process_clock_get(kernel::actor::ActorImpl::self());
+  } else {
+    return kernel::EngineImpl::get_clock();
+  }
 }
 
-void Engine::register_function(std::string name, int (*code)(int, char**))
-{
-  SIMIX_function_register(name, code);
-}
-void Engine::register_function(std::string name, void (*code)(std::vector<std::string>))
+void Engine::add_model(std::shared_ptr<kernel::resource::Model> model,
+                       const std::vector<kernel::resource::Model*>& dependencies)
 {
-  SIMIX_function_register(name, code);
+  kernel::actor::simcall_answered([this, &model, &dependencies] { pimpl_->add_model(std::move(model), dependencies); });
 }
-void Engine::register_default(int (*code)(int, char**))
+
+const std::vector<simgrid::kernel::resource::Model*>& Engine::get_all_models() const
 {
-  SIMIX_function_register_default(code);
+  return pimpl_->get_all_models();
 }
-void Engine::load_deployment(std::string deploy)
+
+void Engine::load_platform(const std::string& platf) const
 {
-  SIMIX_launch_application(deploy);
+  pimpl_->load_platform(platf);
 }
-/** @brief Returns the amount of hosts in the platform */
-size_t Engine::get_host_count()
+
+void Engine::seal_platform() const
 {
-  return pimpl->hosts_.size();
+  pimpl_->seal_platform();
 }
-/** @brief Fills the passed list with all hosts found in the platform
- *  @deprecated Please prefer Engine::getAllHosts()
- */
-void Engine::getHostList(std::vector<Host*>* list)
+
+static void flatify_hosts(Engine const& engine, std::stringstream& ss)
 {
-  for (auto const& kv : pimpl->hosts_)
-    list->push_back(kv.second);
+  // Regular hosts
+  std::vector<Host*> hosts = engine.get_all_hosts();
+
+  for (auto const* h : hosts) {
+    ss << "  <host id=\"" << h->get_name() << "\" speed=\"" << h->get_speed() << "\"";
+    const std::unordered_map<std::string, std::string>* props = h->get_properties();
+    if (h->get_core_count() > 1)
+      ss << " core=\"" << h->get_core_count() << "\"";
+
+    // Sort the properties before displaying them, so that the tests are perfectly reproducible
+    std::vector<std::string> keys;
+    for (auto const& [key, _] : *props)
+      keys.push_back(key);
+    if (not keys.empty()) {
+      ss << ">\n";
+      std::sort(keys.begin(), keys.end());
+      for (const std::string& key : keys)
+        ss << "    <prop id=\"" << key << "\" value=\"" << props->at(key) << "\"/>\n";
+      ss << "  </host>\n";
+    } else {
+      ss << "/>\n";
+    }
+  }
+
+  // Routers
+  std::vector<simgrid::kernel::routing::NetPoint*> netpoints = engine.get_all_netpoints();
+  std::sort(netpoints.begin(), netpoints.end(),
+            [](const simgrid::kernel::routing::NetPoint* a, const simgrid::kernel::routing::NetPoint* b) {
+              return a->get_name() < b->get_name();
+            });
+
+  for (auto const& src : netpoints)
+    if (src->is_router())
+      ss << "  <router id=\"" << src->get_name() << "\"/>\n";
 }
 
-std::vector<Host*> Engine::get_all_hosts()
+static void flatify_links(Engine const& engine, std::stringstream& ss)
 {
-  std::vector<Host*> res;
-  for (auto const& kv : pimpl->hosts_)
-    res.push_back(kv.second);
-  return res;
+  std::vector<Link*> links = engine.get_all_links();
+
+  std::sort(links.begin(), links.end(), [](const Link* a, const Link* b) { return a->get_name() < b->get_name(); });
+
+  for (auto const* link : links) {
+    ss << "  <link id=\"" << link->get_name() << "\"";
+    ss << " bandwidth=\"" << link->get_bandwidth() << "\"";
+    ss << " latency=\"" << link->get_latency() << "\"";
+    if (link->get_concurrency_limit() != -1)
+      ss << " concurrency=\"" << link->get_concurrency_limit() << "\"";
+    if (link->is_shared()) {
+      ss << "/>\n";
+    } else {
+      ss << " sharing_policy=\"FATPIPE\"/>\n";
+    }
+  }
 }
 
-std::vector<Host*> Engine::get_filtered_hosts(std::function<bool(Host*)> filter)
-{
-  std::vector<Host*> hosts;
-  for (auto const& kv : pimpl->hosts_) {
-    if (filter(kv.second))
-      hosts.push_back(kv.second);
+static void flatify_routes(Engine const& engine, std::stringstream& ss)
+{
+  auto hosts     = engine.get_all_hosts();
+  auto netpoints = engine.get_all_netpoints();
+  std::sort(netpoints.begin(), netpoints.end(),
+            [](const simgrid::kernel::routing::NetPoint* a, const simgrid::kernel::routing::NetPoint* b) {
+              return a->get_name() < b->get_name();
+            });
+
+  for (auto const* src_host : hosts) { // Routes from host
+    const simgrid::kernel::routing::NetPoint* src = src_host->get_netpoint();
+    for (auto const* dst_host : hosts) { // Routes to host
+      std::vector<simgrid::kernel::resource::StandardLinkImpl*> route;
+      const simgrid::kernel::routing::NetPoint* dst = dst_host->get_netpoint();
+      simgrid::kernel::routing::NetZoneImpl::get_global_route(src, dst, route, nullptr);
+      if (route.empty())
+        continue;
+      ss << "  <route src=\"" << src_host->get_name() << "\" dst=\"" << dst_host->get_name() << "\">\n  ";
+      for (auto const& link : route)
+        ss << "<link_ctn id=\"" << link->get_name() << "\"/>";
+      ss << "\n  </route>\n";
+    }
+
+    for (auto const& dst : netpoints) { // to router
+      if (not dst->is_router())
+        continue;
+      ss << "  <route src=\"" << src_host->get_name() << "\" dst=\"" << dst->get_name() << "\">\n  ";
+      std::vector<simgrid::kernel::resource::StandardLinkImpl*> route;
+      simgrid::kernel::routing::NetZoneImpl::get_global_route(src, dst, route, nullptr);
+      for (auto const& link : route)
+        ss << "<link_ctn id=\"" << link->get_name() << "\"/>";
+      ss << "\n  </route>\n";
+    }
   }
 
-  return hosts;
+  for (auto const& value1 : netpoints) { // Routes from router
+    if (not value1->is_router())
+      continue;
+    for (auto const& value2 : netpoints) { // to router
+      if (not value2->is_router())
+        continue;
+      std::vector<simgrid::kernel::resource::StandardLinkImpl*> route;
+      simgrid::kernel::routing::NetZoneImpl::get_global_route(value1, value2, route, nullptr);
+      if (route.empty())
+        continue;
+      ss << "  <route src=\"" << value1->get_name() << "\" dst=\"" << value2->get_name() << "\">\n  ";
+      for (auto const& link : route)
+        ss << "<link_ctn id=\"" << link->get_name() << "\"/>";
+      ss << "\n  </route>\n";
+    }
+    for (auto const* dst_host : hosts) { // Routes to host
+      ss << "  <route src=\"" << value1->get_name() << "\" dst=\"" << dst_host->get_name() << "\">\n  ";
+      std::vector<simgrid::kernel::resource::StandardLinkImpl*> route;
+      const simgrid::kernel::routing::NetPoint* netcardDst = dst_host->get_netpoint();
+      simgrid::kernel::routing::NetZoneImpl::get_global_route(value1, netcardDst, route, nullptr);
+      for (auto const& link : route)
+        ss << "<link_ctn id=\"" << link->get_name() << "\"/>";
+      ss << "\n  </route>\n";
+    }
+  }
 }
-
-void Engine::host_register(std::string name, simgrid::s4u::Host* host)
+std::string Engine::flatify_platform() const
 {
-  pimpl->hosts_[name] = host;
+  std::string version = "4.1";
+  std::stringstream ss;
+
+  ss << "<?xml version='1.0'?>\n";
+  ss << "<!DOCTYPE platform SYSTEM \"https://simgrid.org/simgrid.dtd\">\n";
+  ss << "<platform version=\"" << version << "\">\n";
+  ss << "<zone id=\"" << get_netzone_root()->get_name() << "\" routing=\"Full\">\n";
+
+  flatify_hosts(*this, ss);
+  flatify_links(*this, ss);
+  flatify_routes(*this, ss);
+
+  ss << "</zone>\n";
+  ss << "</platform>\n";
+  return ss.str();
 }
 
-void Engine::host_unregister(std::string name)
+/** Registers the main function of an actor that will be launched from the deployment file */
+void Engine::register_function(const std::string& name, const std::function<void(int, char**)>& code)
 {
-  pimpl->hosts_.erase(name);
+  kernel::actor::ActorCodeFactory code_factory = [code](std::vector<std::string> args) {
+    return xbt::wrap_main(code, std::move(args));
+  };
+  register_function(name, code_factory);
 }
 
-/** @brief Find an host from its name.
+/** Registers the main function of an actor that will be launched from the deployment file */
+void Engine::register_function(const std::string& name, const std::function<void(std::vector<std::string>)>& code)
+{
+  kernel::actor::ActorCodeFactory code_factory = [code{code}](std::vector<std::string> args) mutable {
+    return std::bind(std::move(code), std::move(args));
+  };
+  register_function(name, code_factory);
+}
+/** Registers a function as the default main function of actors
  *
- *  @throw std::invalid_argument if the searched host does not exist.
+ * It will be used as fallback when the function requested from the deployment file was not registered.
+ * It is used for trace-based simulations (see examples/cpp/replay-comms and similar).
  */
-simgrid::s4u::Host* Engine::host_by_name(std::string name)
+void Engine::register_default(const std::function<void(int, char**)>& code)
+{
+  register_default([code](std::vector<std::string> args) { return xbt::wrap_main(code, std::move(args)); });
+}
+void Engine::register_default(const kernel::actor::ActorCodeFactory& code)
 {
-  if (pimpl->hosts_.find(name) == pimpl->hosts_.end())
-    throw std::invalid_argument(std::string("Host not found: '") + name + std::string("'"));
-  return pimpl->hosts_.at(name);
+  simgrid::kernel::actor::simcall_answered([this, &code]() { pimpl_->register_default(code); });
 }
 
-/** @brief Find an host from its name (or nullptr if that host does not exist) */
-simgrid::s4u::Host* Engine::host_by_name_or_null(std::string name)
+void Engine::register_function(const std::string& name, const kernel::actor::ActorCodeFactory& code)
 {
-  auto host = pimpl->hosts_.find(name);
-  return host == pimpl->hosts_.end() ? nullptr : host->second;
+  simgrid::kernel::actor::simcall_answered([this, name, &code]() { pimpl_->register_function(name, code); });
 }
 
-/** @brief Find a link from its name.
+/** Load a deployment file and launch the actors that it contains
  *
- *  @throw std::invalid_argument if the searched link does not exist.
+ * @beginrst
+ * See also: :ref:`deploy`.
+ * @endrst
  */
-simgrid::s4u::Link* Engine::link_by_name(std::string name)
+void Engine::load_deployment(const std::string& deploy) const
 {
-  if (pimpl->links_.find(name) == pimpl->links_.end())
-    throw std::invalid_argument(std::string("Link not found: ") + name);
-
-  return pimpl->links_.at(name);
+  pimpl_->load_deployment(deploy);
 }
 
-/** @brief Find an link from its name (or nullptr if that link does not exist) */
-simgrid::s4u::Link* Engine::link_by_name_or_null(std::string name)
+/** Returns the amount of hosts in the platform */
+size_t Engine::get_host_count() const
 {
-  auto link = pimpl->links_.find(name);
-  return link == pimpl->links_.end() ? nullptr : link->second;
+  return get_all_hosts().size();
 }
 
-void Engine::link_register(std::string name, simgrid::s4u::Link* link)
+std::vector<Host*> Engine::get_all_hosts() const
 {
-  pimpl->links_[name] = link;
+  return get_filtered_hosts([](const Host*) { return true; });
 }
 
-void Engine::link_unregister(std::string name)
+std::vector<Host*> Engine::get_filtered_hosts(const std::function<bool(Host*)>& filter) const
 {
-  pimpl->links_.erase(name);
+  std::vector<Host*> hosts;
+  if (pimpl_->netzone_root_) {
+    hosts = pimpl_->netzone_root_->get_filtered_hosts(filter);
+  }
+  /* Sort hosts in lexicographical order: keep same behavior when the hosts were saved on Engine
+   * Some tests do a get_all_hosts() and selects hosts in this order */
+  std::sort(hosts.begin(), hosts.end(), [](const auto* h1, const auto* h2) { return h1->get_name() < h2->get_name(); });
+
+  return hosts;
 }
 
-/** @brief Returns the amount of storages in the platform */
-size_t Engine::get_storage_count()
+/** @brief Find a host from its name.
+ *
+ *  @throw std::invalid_argument if the searched host does not exist.
+ */
+Host* Engine::host_by_name(const std::string& name) const
 {
-  return pimpl->storages_.size();
+  auto* host = host_by_name_or_null(name);
+  if (not host)
+    throw std::invalid_argument("Host not found: '" + name + "'");
+  return host;
 }
 
-/** @brief Returns the list of all storages found in the platform */
-std::vector<Storage*> Engine::get_all_storages()
+/** @brief Find a host from its name (or nullptr if that host does not exist) */
+Host* Engine::host_by_name_or_null(const std::string& name) const
 {
-  std::vector<Storage*> res;
-  for (auto const& kv : pimpl->storages_)
-    res.push_back(kv.second);
-  return res;
+  Host* host = nullptr;
+  if (pimpl_->netzone_root_) {
+    auto* host_impl = pimpl_->netzone_root_->get_host_by_name_or_null(name);
+    if (host_impl)
+      host = host_impl->get_iface();
+  }
+  return host;
 }
 
-/** @brief Find a storage from its name.
+/** @brief Find a link from its name.
  *
- *  @throw std::invalid_argument if the searched storage does not exist.
+ *  @throw std::invalid_argument if the searched link does not exist.
  */
-simgrid::s4u::Storage* Engine::storage_by_name(std::string name)
+Link* Engine::link_by_name(const std::string& name) const
 {
-  if (pimpl->storages_.find(name) == pimpl->storages_.end())
-    throw std::invalid_argument(std::string("Storage not found: ") + name);
+  auto* link = link_by_name_or_null(name);
+  if (not link)
+    throw std::invalid_argument("Link not found: " + name);
+  return link;
+}
 
-  return pimpl->storages_.at(name);
+SplitDuplexLink* Engine::split_duplex_link_by_name(const std::string& name) const
+{
+  auto* link_impl =
+      pimpl_->netzone_root_ ? pimpl_->netzone_root_->get_split_duplex_link_by_name_or_null(name) : nullptr;
+  if (not link_impl)
+    throw std::invalid_argument("Link not found: " + name);
+  return link_impl->get_iface();
 }
 
-/** @brief Find a storage from its name (or nullptr if that storage does not exist) */
-simgrid::s4u::Storage* Engine::storage_by_name_or_null(std::string name)
+/** @brief Find a link from its name (or nullptr if that link does not exist) */
+Link* Engine::link_by_name_or_null(const std::string& name) const
 {
-  auto storage = pimpl->storages_.find(name);
-  return storage == pimpl->storages_.end() ? nullptr : storage->second;
+  Link* link = nullptr;
+  if (pimpl_->netzone_root_) {
+    /* keep behavior where internal __loopback__ link from network model is given to user */
+    if (name == "__loopback__")
+      return pimpl_->netzone_root_->get_network_model()->loopback_->get_iface();
+    auto* link_impl = pimpl_->netzone_root_->get_link_by_name_or_null(name);
+    if (link_impl)
+      link = link_impl->get_iface();
+  }
+  return link;
 }
 
-void Engine::storage_register(std::string name, simgrid::s4u::Storage* storage)
+/** @brief Find a mailbox from its name or create one if it does not exist) */
+Mailbox* Engine::mailbox_by_name_or_create(const std::string& name) const
 {
-  pimpl->storages_[name] = storage;
+  /* two actors may have pushed the same mbox_create simcall at the same time */
+  kernel::activity::MailboxImpl* mbox = kernel::actor::simcall_answered([&name, this] {
+    auto [m, inserted] = pimpl_->mailboxes_.try_emplace(name, nullptr);
+    if (inserted) {
+      m->second = new kernel::activity::MailboxImpl(name);
+      XBT_DEBUG("Creating a mailbox at %p with name %s", m->second, name.c_str());
+    }
+    return m->second;
+  });
+  return mbox->get_iface();
 }
 
-void Engine::storage_unregister(std::string name)
+MessageQueue* Engine::message_queue_by_name_or_create(const std::string& name) const
 {
-  pimpl->storages_.erase(name);
+  /* two actors may have pushed the same mbox_create simcall at the same time */
+  kernel::activity::MessageQueueImpl* queue = kernel::actor::simcall_answered([&name, this] {
+    auto [m, inserted] = pimpl_->mqueues_.try_emplace(name, nullptr);
+    if (inserted) {
+      m->second = new kernel::activity::MessageQueueImpl(name);
+      XBT_DEBUG("Creating a message queue at %p with name %s", m->second, name.c_str());
+    }
+    return m->second;
+  });
+  return queue->get_iface();
 }
 
 /** @brief Returns the amount of links in the platform */
-size_t Engine::get_link_count()
+size_t Engine::get_link_count() const
 {
-  return pimpl->links_.size();
+  int count = 0;
+  if (pimpl_->netzone_root_) {
+    count += pimpl_->netzone_root_->get_link_count();
+    /* keep behavior where internal __loopback__ link from network model is given to user */
+    count += pimpl_->netzone_root_->get_network_model()->loopback_ ? 1 : 0;
+  }
+  return count;
 }
 
 /** @brief Returns the list of all links found in the platform */
-std::vector<Link*> Engine::get_all_links()
+std::vector<Link*> Engine::get_all_links() const
 {
-  std::vector<Link*> res;
-  for (auto const& kv : pimpl->links_)
-    res.push_back(kv.second);
-  return res;
+  return get_filtered_links([](const Link*) { return true; });
 }
 
-std::vector<Link*> Engine::get_filtered_links(std::function<bool(Link*)> filter)
+std::vector<Link*> Engine::get_filtered_links(const std::function<bool(Link*)>& filter) const
 {
-  std::vector<Link*> filtered_list;
-  for (auto const& kv : pimpl->links_)
-    if (filter(kv.second))
-      filtered_list.push_back(kv.second);
-  return filtered_list;
+  std::vector<Link*> res;
+  if (pimpl_->netzone_root_) {
+    res = pimpl_->netzone_root_->get_filtered_links(filter);
+    /* keep behavior where internal __loopback__ link from network model is given to user */
+    if (pimpl_->netzone_root_->get_network_model()->loopback_ &&
+        filter(pimpl_->netzone_root_->get_network_model()->loopback_->get_iface()))
+      res.push_back(pimpl_->netzone_root_->get_network_model()->loopback_->get_iface());
+  }
+  return res;
 }
 
-size_t Engine::get_actor_count()
+size_t Engine::get_actor_count() const
 {
-  return simix_global->process_list.size();
+  return pimpl_->get_actor_count();
 }
 
-std::vector<ActorPtr> Engine::get_all_actors()
+std::vector<ActorPtr> Engine::get_all_actors() const
 {
   std::vector<ActorPtr> actor_list;
-  actor_list.push_back(simgrid::s4u::Actor::self());
-  for (auto& kv : simix_global->process_list) {
-    actor_list.push_back(kv.second->iface());
+  for (auto const& [_, actor] : pimpl_->get_actor_list()) {
+    actor_list.push_back(actor->get_iface());
   }
   return actor_list;
 }
 
-std::vector<ActorPtr> Engine::get_filtered_actors(std::function<bool(ActorPtr)> filter)
+std::vector<ActorPtr> Engine::get_filtered_actors(const std::function<bool(ActorPtr)>& filter) const
 {
   std::vector<ActorPtr> actor_list;
-  for (auto& kv : simix_global->process_list) {
-    if (filter(kv.second->iface()))
-      actor_list.push_back(kv.second->iface());
+  for (auto const& [_, actor] : pimpl_->get_actor_list()) {
+    if (filter(actor->get_iface()))
+      actor_list.push_back(actor->get_iface());
   }
   return actor_list;
 }
 
-void Engine::run()
+void Engine::run() const
 {
+  run_until(-1);
+}
+void Engine::run_until(double max_date) const
+{
+  if (static bool callback_called = false; not callback_called) {
+    on_simulation_start();
+    callback_called = true;
+  }
   /* Clean IO before the run */
   fflush(stdout);
   fflush(stderr);
 
-  if (MC_is_active()) {
-    MC_run();
-  } else {
-    SIMIX_run();
-  }
+  pimpl_->run(max_date);
+}
+
+void Engine::track_vetoed_activities(std::set<Activity*>* vetoed_activities) const
+{
+  Activity::set_vetoed_activities(vetoed_activities);
 }
 
 /** @brief Retrieve the root netzone, containing all others */
-s4u::NetZone* Engine::get_netzone_root()
+s4u::NetZone* Engine::get_netzone_root() const
 {
-  return pimpl->netzone_root_->get_iface();
+  if (pimpl_->netzone_root_)
+    return pimpl_->netzone_root_->get_iface();
+  return nullptr;
 }
 /** @brief Set the root netzone, containing all others. Once set, it cannot be changed. */
-void Engine::set_netzone_root(s4u::NetZone* netzone)
+void Engine::set_netzone_root(const s4u::NetZone* netzone)
 {
-  xbt_assert(pimpl->netzone_root_ == nullptr, "The root NetZone cannot be changed once set");
-  pimpl->netzone_root_ = netzone->get_impl();
+  xbt_assert(pimpl_->netzone_root_ == nullptr, "The root NetZone cannot be changed once set");
+  pimpl_->netzone_root_ = netzone->get_impl();
 }
 
-static s4u::NetZone* netzone_by_name_recursive(s4u::NetZone* current, std::string name)
+static NetZone* netzone_by_name_recursive(NetZone* current, const std::string& name)
 {
   if (current->get_name() == name)
     return current;
 
   for (auto const& elem : current->get_children()) {
-    simgrid::s4u::NetZone* tmp = netzone_by_name_recursive(elem, name);
+    NetZone* tmp = netzone_by_name_recursive(elem, name);
     if (tmp != nullptr) {
       return tmp;
     }
@@ -315,44 +520,46 @@ static s4u::NetZone* netzone_by_name_recursive(s4u::NetZone* current, std::strin
 }
 
 /** @brief Retrieve the NetZone of the given name (or nullptr if not found) */
-NetZone* Engine::netzone_by_name_or_null(std::string name)
+NetZone* Engine::netzone_by_name_or_null(const std::string& name) const
 {
   return netzone_by_name_recursive(get_netzone_root(), name);
 }
 
 /** @brief Retrieve the netpoint of the given name (or nullptr if not found) */
-simgrid::kernel::routing::NetPoint* Engine::netpoint_by_name_or_null(std::string name)
+kernel::routing::NetPoint* Engine::netpoint_by_name_or_null(const std::string& name) const
 {
-  auto netp = pimpl->netpoints_.find(name);
-  return netp == pimpl->netpoints_.end() ? nullptr : netp->second;
+  auto netp = pimpl_->netpoints_.find(name);
+  return netp == pimpl_->netpoints_.end() ? nullptr : netp->second;
 }
 
-/** @brief Fill the provided vector with all existing netpoints */
-void Engine::getNetpointList(std::vector<simgrid::kernel::routing::NetPoint*>* list)
+kernel::routing::NetPoint* Engine::netpoint_by_name(const std::string& name) const
 {
-  for (auto const& kv : pimpl->netpoints_)
-    list->push_back(kv.second);
+  auto* netp = netpoint_by_name_or_null(name);
+  if (netp == nullptr) {
+    throw std::invalid_argument("Netpoint not found: " + name);
+  }
+  return netp;
 }
-std::vector<simgrid::kernel::routing::NetPoint*> Engine::get_all_netpoints()
+
+std::vector<kernel::routing::NetPoint*> Engine::get_all_netpoints() const
 {
-  std::vector<simgrid::kernel::routing::NetPoint*> res;
-  for (auto const& kv : pimpl->netpoints_)
-    res.push_back(kv.second);
+  std::vector<kernel::routing::NetPoint*> res;
+  for (auto const& [_, netpoint] : pimpl_->netpoints_)
+    res.push_back(netpoint);
   return res;
 }
 
 /** @brief Register a new netpoint to the system */
-void Engine::netpoint_register(simgrid::kernel::routing::NetPoint* point)
+void Engine::netpoint_register(kernel::routing::NetPoint* point)
 {
-  // simgrid::simix::simcall([&]{ FIXME: this segfaults in set_thread
-  pimpl->netpoints_[point->get_name()] = point;
-  // });
+  simgrid::kernel::actor::simcall_answered([this, point] { pimpl_->netpoints_[point->get_name()] = point; });
 }
+
 /** @brief Unregister a given netpoint */
-void Engine::netpoint_unregister(simgrid::kernel::routing::NetPoint* point)
+void Engine::netpoint_unregister(kernel::routing::NetPoint* point)
 {
-  simgrid::simix::simcall([this, point] {
-    pimpl->netpoints_.erase(point->get_name());
+  kernel::actor::simcall_answered([this, point] {
+    pimpl_->netpoints_.erase(point->get_name());
     delete point;
   });
 }
@@ -361,17 +568,40 @@ bool Engine::is_initialized()
 {
   return Engine::instance_ != nullptr;
 }
-void Engine::set_config(std::string str)
+void Engine::set_config(const std::string& str)
+{
+  config::set_parse(str);
+}
+void Engine::set_config(const std::string& name, int value)
+{
+  config::set_value(name.c_str(), value);
+}
+void Engine::set_config(const std::string& name, double value)
 {
-  simgrid::config::set_parse(std::move(str));
+  config::set_value(name.c_str(), value);
+}
+void Engine::set_config(const std::string& name, bool value)
+{
+  config::set_value(name.c_str(), value);
+}
+void Engine::set_config(const std::string& name, const std::string& value)
+{
+  config::set_value(name.c_str(), value);
+}
+
+Engine* Engine::set_default_comm_data_copy_callback(
+    const std::function<void(kernel::activity::CommImpl*, void*, size_t)>& callback)
+{
+  kernel::activity::CommImpl::set_copy_data_callback(callback);
+  return this;
 }
-} // namespace s4u
-} // namespace simgrid
+
+} // namespace simgrid::s4u
 
 /* **************************** Public C interface *************************** */
 void simgrid_init(int* argc, char** argv)
 {
-  simgrid::s4u::Engine e(argc, argv);
+  static simgrid::s4u::Engine e(argc, argv);
 }
 void simgrid_load_platform(const char* file)
 {
@@ -386,11 +616,15 @@ void simgrid_run()
 {
   simgrid::s4u::Engine::get_instance()->run();
 }
-void simgrid_register_function(const char* name, int (*code)(int, char**))
+void simgrid_run_until(double max_date)
+{
+  simgrid::s4u::Engine::get_instance()->run_until(max_date);
+}
+void simgrid_register_function(const char* name, void (*code)(int, char**))
 {
   simgrid::s4u::Engine::get_instance()->register_function(name, code);
 }
-void simgrid_register_default(int (*code)(int, char**))
+void simgrid_register_default(void (*code)(int, char**))
 {
   simgrid::s4u::Engine::get_instance()->register_default(code);
 }
@@ -398,3 +632,8 @@ double simgrid_get_clock()
 {
   return simgrid::s4u::Engine::get_clock();
 }
+
+void simgrid_set_maestro(void (*code)(void*), void* data)
+{
+  maestro_code = std::bind(code, data);
+}