X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/55e6d07cfba4948a918765e9d6fd2801d3639a4a..5f5a10db6fc4552782638abb4817041223e17775:/src/kernel/context/Context.cpp

diff --git a/src/kernel/context/Context.cpp b/src/kernel/context/Context.cpp
index dedbf2c147..5736b265cd 100644
--- a/src/kernel/context/Context.cpp
+++ b/src/kernel/context/Context.cpp
@@ -1,63 +1,76 @@
-/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2023. 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 "src/mc/mc.h"
 
+#include "simgrid/Exception.hpp"
 #include "simgrid/s4u/Host.hpp"
 #include "src/kernel/activity/CommImpl.hpp"
 #include "src/kernel/context/Context.hpp"
-#include "src/simix/smx_private.hpp"
-#include "src/surf/surf_interface.hpp"
+#include "src/sthread/sthread.h"
 
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
+#include <vector>
 
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_context, kernel, "Context switching mechanism");
 
-namespace simgrid {
-namespace kernel {
-namespace context {
+namespace simgrid::kernel::context {
 
-ContextFactoryInitializer factory_initializer = nullptr;
+void Context::set_nthreads(int nb_threads)
+{
+  if (nb_threads <= 0) {
+    nb_threads = std::thread::hardware_concurrency();
+    XBT_INFO("Auto-setting contexts/nthreads to %d", nb_threads);
+  }
+  Context::parallel_contexts = nb_threads;
+}
 
 ContextFactory::~ContextFactory() = default;
 
-static thread_local smx_context_t smx_current_context = nullptr;
-Context* Context::self()
+e_xbt_parmap_mode_t Context::parallel_mode = XBT_PARMAP_DEFAULT;
+int Context::parallel_contexts             = 1;
+unsigned Context::stack_size;
+unsigned Context::guard_size;
+thread_local Context* Context::current_context_ = nullptr;
+
+/* Install or disable alternate signal stack, for SIGSEGV handler. */
+int Context::install_sigsegv_stack(bool enable)
 {
-  return smx_current_context;
+  static std::vector<unsigned char> sigsegv_stack(SIGSTKSZ);
+  stack_t stack;
+  stack.ss_sp    = sigsegv_stack.data();
+  stack.ss_size  = sigsegv_stack.size();
+  stack.ss_flags = enable ? 0 : SS_DISABLE;
+  return sigaltstack(&stack, nullptr);
 }
-void Context::set_current(Context* self)
+
+Context* Context::self()
 {
-  smx_current_context = self;
+  return current_context_;
 }
-
-void Context::declare_context(std::size_t size)
+void Context::set_current(Context* self)
 {
-#if SIMGRID_HAVE_MC
-  /* Store the address of the stack in heap to compare it apart of heap comparison */
-  if(MC_is_active())
-    MC_ignore_heap(this, size);
-#endif
+  current_context_ = self;
 }
 
-Context* ContextFactory::attach(smx_actor_t)
+Context* ContextFactory::attach(actor::ActorImpl*)
 {
   xbt_die("Cannot attach with this ContextFactory.\n"
     "Try using --cfg=contexts/factory:thread instead.\n");
 }
 
-Context* ContextFactory::create_maestro(std::function<void()>, smx_actor_t)
+Context* ContextFactory::create_maestro(std::function<void()>&&, actor::ActorImpl*)
 {
   xbt_die("Cannot create_maestro with this ContextFactory.\n"
     "Try using --cfg=contexts/factory:thread instead.\n");
 }
 
-Context::Context(std::function<void()> code, smx_actor_t actor) : code_(std::move(code)), actor_(actor)
+Context::Context(std::function<void()>&& code, actor::ActorImpl* actor, bool maestro)
+    : code_(std::move(code)), actor_(actor), is_maestro_(maestro)
 {
-  /* If no function was provided, this is the context for maestro
-   * and we should set it as the current context */
-  if (not has_code())
+  /* If we are creating maestro, we should set it as the current context */
+  if (maestro)
     set_current(this);
 }
 
@@ -69,53 +82,10 @@ Context::~Context()
 
 void Context::stop()
 {
-  actor_->finished_ = true;
-
-  if (actor_->has_to_auto_restart() && not actor_->get_host()->is_on()) {
-    XBT_DEBUG("Insert host %s to watched_hosts because it's off and %s needs to restart",
-              actor_->get_host()->get_cname(), actor_->get_cname());
-    watched_hosts.insert(actor_->get_host()->get_name());
-  }
-
-  // Execute the termination callbacks
-  smx_process_exit_status_t exit_status = (actor_->context_->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
-  while (not actor_->on_exit.empty()) {
-    s_smx_process_exit_fun_t exit_fun = actor_->on_exit.back();
-    actor_->on_exit.pop_back();
-    (exit_fun.fun)(exit_status, exit_fun.arg);
-  }
-
-  /* cancel non-blocking activities */
-  for (auto activity : actor_->comms)
-    boost::static_pointer_cast<activity::CommImpl>(activity)->cancel();
-  actor_->comms.clear();
-
-  XBT_DEBUG("%s@%s(%ld) should not run anymore", actor_->get_cname(), actor_->iface()->get_host()->get_cname(),
-            actor_->get_pid());
-
-  this->actor_->cleanup();
-
-  this->iwannadie = false; // don't let the simcall's yield() do a Context::stop(), because that's me
-  simgrid::simix::simcall([this] {
-    simgrid::s4u::Actor::on_destruction(actor_->iface());
-
-    /* Unregister from the kill timer if any */
-    if (actor_->kill_timer != nullptr) {
-      actor_->kill_timer->remove();
-      actor_->kill_timer = nullptr;
-    }
-
-    actor_->cleanup();
-  });
-  this->iwannadie = true;
+  this->actor_->cleanup_from_self();
+  sthread_disable();
+  throw ForcefulKillException(); // clean RAII variables with the dedicated exception
 }
-
 AttachContext::~AttachContext() = default;
 
-}}}
-
-/** @brief Executes all the processes to run (in parallel if possible). */
-void SIMIX_context_runall()
-{
-  simix_global->context_factory->run_all();
-}
+} // namespace simgrid::kernel::context