1 /* Copyright (c) 2009-2017. 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_SIMIX_BOOST_CONTEXT_HPP
7 #define SIMGRID_SIMIX_BOOST_CONTEXT_HPP
11 #include "Context.hpp"
12 #include "src/internal_config.h"
13 #include "src/simix/smx_private.hpp"
20 class RawContextFactory;
22 /** @brief Fast context switching inspired from SystemV ucontexts.
24 * The main difference to the System V context is that Raw Contexts are much faster because they don't
25 * preserve the signal mask when switching. This saves a system call (at least on Linux) on each context switch.
27 class RawContext : public Context {
29 void* stack_ = nullptr;
30 /** pointer to top the stack stack */
31 void* stack_top_ = nullptr;
34 friend class RawContextFactory;
35 RawContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process);
36 ~RawContext() override;
38 static void wrapper(void* arg);
40 void suspend() override;
44 void suspend_serial();
45 void suspend_parallel();
47 void resume_parallel();
50 class RawContextFactory : public ContextFactory {
53 ~RawContextFactory() override;
54 RawContext* create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t process) override;
55 void run_all() override;
58 void run_all_serial();
59 void run_all_parallel();