X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f89671e0bd7450461d70d5ced6079123e73c2a63..5f5a10db6fc4552782638abb4817041223e17775:/src/kernel/context/Context.hpp

diff --git a/src/kernel/context/Context.hpp b/src/kernel/context/Context.hpp
index b5e5e64f38..16c5e82274 100644
--- a/src/kernel/context/Context.hpp
+++ b/src/kernel/context/Context.hpp
@@ -1,4 +1,4 @@
-/* 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. */
@@ -6,19 +6,19 @@
 #ifndef SIMGRID_KERNEL_CONTEXT_CONTEXT_HPP
 #define SIMGRID_KERNEL_CONTEXT_CONTEXT_HPP
 
-#include "simgrid/forward.h"
+#include <simgrid/forward.h>
+#include <xbt/parmap.h>
+
 #include "src/kernel/activity/ActivityImpl.hpp"
 
 #include <csignal>
 #include <functional>
 
-namespace simgrid {
-namespace kernel {
-namespace context {
+namespace simgrid::kernel::context {
 
 class XBT_PUBLIC ContextFactory {
 public:
-  explicit ContextFactory() {}
+  explicit ContextFactory()             = default;
   ContextFactory(const ContextFactory&) = delete;
   ContextFactory& operator=(const ContextFactory&) = delete;
   virtual ~ContextFactory();
@@ -29,13 +29,12 @@ public:
   /** Turn the current thread into maestro (the old maestro becomes a regular actor) */
   virtual Context* create_maestro(std::function<void()>&& code, actor::ActorImpl* actor);
 
-  virtual void run_all() = 0;
+  virtual void run_all(std::vector<actor::ActorImpl*> const& actors_list) = 0;
 
 protected:
   template <class T, class... Args> T* new_context(Args&&... args)
   {
-    T* context = new T(std::forward<Args>(args)...);
-    context->declare_context(sizeof(T));
+    auto* context = new T(std::forward<Args>(args)...);
     return context;
   }
 };
@@ -43,21 +42,45 @@ protected:
 class XBT_PUBLIC Context {
   friend ContextFactory;
 
+  static int parallel_contexts;
+  static thread_local Context* current_context_;
+
   std::function<void()> code_;
   actor::ActorImpl* actor_ = nullptr;
-  void declare_context(std::size_t size);
+  bool is_maestro_;
 
 public:
-  bool iwannadie = false;
+  static e_xbt_parmap_mode_t parallel_mode;
+  static unsigned stack_size;
+  static unsigned guard_size;
 
-  Context(std::function<void()>&& code, actor::ActorImpl* actor);
+  static int install_sigsegv_stack(bool enable);
+
+  Context(std::function<void()>&& code, actor::ActorImpl* actor, bool maestro);
   Context(const Context&) = delete;
   Context& operator=(const Context&) = delete;
   virtual ~Context();
 
-  void operator()() { code_(); }
+  bool is_maestro() const { return is_maestro_; }
+  void operator()() const { code_(); }
   bool has_code() const { return static_cast<bool>(code_); }
-  actor::ActorImpl* get_actor() { return this->actor_; }
+  actor::ActorImpl* get_actor() const { return this->actor_; }
+
+  /** @brief Returns whether some parallel threads are used for the user contexts. */
+  static bool is_parallel() { return parallel_contexts > 1; }
+  /** @brief Returns the number of parallel threads used for the user contexts (1 means no parallelism). */
+  static int get_nthreads() { return parallel_contexts; }
+  /**
+   * @brief Sets the number of parallel threads to use  for the user contexts.
+   *
+   * This function should be called before initializing SIMIX.
+   * A value of 1 means no parallelism (1 thread only).
+   * If the value is greater than 1, the thread support must be enabled.
+   * If the value is less than 1, the optimal number of threads is chosen automatically.
+   *
+   * @param nb_threads the number of threads to use
+   */
+  static void set_nthreads(int nb_threads);
 
   // Scheduling methods
   virtual void stop();
@@ -72,43 +95,26 @@ public:
 
 class XBT_PUBLIC AttachContext : public Context {
 public:
-  AttachContext(std::function<void()>&& code, actor::ActorImpl* actor) : Context(std::move(code), actor) {}
+  AttachContext(std::function<void()>&& code, actor::ActorImpl* actor, bool maestro)
+      : Context(std::move(code), actor, maestro)
+  {
+  }
   AttachContext(const AttachContext&) = delete;
   AttachContext& operator=(const AttachContext&) = delete;
   ~AttachContext() override;
 
-  /** Called by the context when it is ready to give control
-   *  to the maestro.
-   */
+  /** Called by the context when it is ready to give control to the maestro */
   virtual void attach_start() = 0;
 
   /** Called by the context when it has finished its job */
   virtual void attach_stop() = 0;
 };
 
-
-/* This allows Java to hijack the context factory (Java induces factories of factory :) */
-typedef ContextFactory* (*ContextFactoryInitializer)();
-XBT_PUBLIC_DATA ContextFactoryInitializer factory_initializer;
-
 XBT_PRIVATE ContextFactory* thread_factory();
 XBT_PRIVATE ContextFactory* sysv_factory();
 XBT_PRIVATE ContextFactory* raw_factory();
 XBT_PRIVATE ContextFactory* boost_factory();
 
-} // namespace context
-} // namespace kernel
-} // namespace simgrid
-
-typedef simgrid::kernel::context::ContextFactory *smx_context_factory_t;
-
-XBT_PRIVATE void SIMIX_context_mod_init();
-XBT_PRIVATE void SIMIX_context_mod_exit();
-
-#ifndef WIN32
-XBT_PUBLIC_DATA unsigned char sigsegv_stack[SIGSTKSZ];
-#endif
-
-XBT_PRIVATE simgrid::simix::ActorCodeFactory& SIMIX_get_actor_code_factory(const std::string& name);
+} // namespace simgrid::kernel::context
 
 #endif