1 /* Copyright (c) 2009-2023. 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_RAW_CONTEXT_HPP
7 #define SIMGRID_KERNEL_CONTEXT_RAW_CONTEXT_HPP
14 #include <xbt/parmap.hpp>
16 #include "src/kernel/context/ContextSwapped.hpp"
18 namespace simgrid::kernel::context {
20 /** @brief Fast context switching inspired from SystemV ucontexts.
22 * The main difference to the System V context is that Raw Contexts are much faster because they don't
23 * preserve the signal mask when switching. This saves a system call (at least on Linux) on each context switch.
25 class RawContext : public SwappedContext {
27 RawContext(std::function<void()>&& code, actor::ActorImpl* actor, SwappedContextFactory* factory);
30 /** pointer to top the stack stack */
31 void* stack_top_ = nullptr;
33 void swap_into_for_real(SwappedContext* to) override;
36 class RawContextFactory : public SwappedContextFactory {
38 RawContext* create_context(std::function<void()>&& code, actor::ActorImpl* actor) override;
40 } // namespace simgrid::kernel::context