1 /* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_KERNEL_CONTEXT_CONTEXT_HPP
7 #define SIMGRID_KERNEL_CONTEXT_CONTEXT_HPP
9 #include "simgrid/forward.h"
10 #include "src/kernel/activity/ActivityImpl.hpp"
19 class XBT_PUBLIC ContextFactory {
21 explicit ContextFactory() = default;
22 ContextFactory(const ContextFactory&) = delete;
23 ContextFactory& operator=(const ContextFactory&) = delete;
24 virtual ~ContextFactory();
25 virtual Context* create_context(std::function<void()>&& code, actor::ActorImpl* actor) = 0;
27 /** Turn the current thread into a simulation context */
28 virtual Context* attach(actor::ActorImpl* actor);
29 /** Turn the current thread into maestro (the old maestro becomes a regular actor) */
30 virtual Context* create_maestro(std::function<void()>&& code, actor::ActorImpl* actor);
32 virtual void run_all() = 0;
35 template <class T, class... Args> T* new_context(Args&&... args)
37 auto* context = new T(std::forward<Args>(args)...);
38 context->declare_context(sizeof(T));
43 class XBT_PUBLIC Context {
44 friend ContextFactory;
46 static thread_local Context* current_context_;
48 std::function<void()> code_;
49 actor::ActorImpl* actor_ = nullptr;
50 bool iwannadie_ = false;
51 void declare_context(std::size_t size);
54 static int install_sigsegv_stack(stack_t* old_stack, bool enable);
56 Context(std::function<void()>&& code, actor::ActorImpl* actor);
57 Context(const Context&) = delete;
58 Context& operator=(const Context&) = delete;
61 bool wannadie() const { return iwannadie_; }
62 void set_wannadie(bool value = true) { iwannadie_ = value; }
63 void operator()() const { code_(); }
64 bool has_code() const { return static_cast<bool>(code_); }
65 actor::ActorImpl* get_actor() const { return this->actor_; }
69 virtual void suspend() = 0;
71 // Retrieving the self() context
72 /** @brief Retrieves the current context of this thread */
73 static Context* self();
74 /** @brief Sets the current context of this thread */
75 static void set_current(Context* self);
78 class XBT_PUBLIC AttachContext : public Context {
80 AttachContext(std::function<void()>&& code, actor::ActorImpl* actor) : Context(std::move(code), actor) {}
81 AttachContext(const AttachContext&) = delete;
82 AttachContext& operator=(const AttachContext&) = delete;
83 ~AttachContext() override;
85 /** Called by the context when it is ready to give control
88 virtual void attach_start() = 0;
90 /** Called by the context when it has finished its job */
91 virtual void attach_stop() = 0;
95 /* This allows Java to hijack the context factory (Java induces factories of factory :) */
96 typedef ContextFactory* (*ContextFactoryInitializer)();
97 XBT_PUBLIC_DATA ContextFactoryInitializer factory_initializer;
99 XBT_PRIVATE ContextFactory* thread_factory();
100 XBT_PRIVATE ContextFactory* sysv_factory();
101 XBT_PRIVATE ContextFactory* raw_factory();
102 XBT_PRIVATE ContextFactory* boost_factory();
104 } // namespace context
105 } // namespace kernel
106 } // namespace simgrid
108 XBT_PRIVATE void SIMIX_context_mod_init();
109 XBT_PRIVATE void SIMIX_context_mod_exit();