1 /* Copyright (c) 2015-2022. 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 #include "ContextBoost.hpp"
7 #include "simgrid/Exception.hpp"
8 #include "src/internal_config.h"
10 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ker_context);
12 namespace simgrid::kernel::context {
14 // BoostContextFactory
15 BoostContext* BoostContextFactory::create_context(std::function<void()>&& code, actor::ActorImpl* actor)
17 return this->new_context<BoostContext>(std::move(code), actor, this);
22 BoostContext::BoostContext(std::function<void()>&& code, actor::ActorImpl* actor, SwappedContextFactory* factory)
23 : SwappedContext(std::move(code), actor, factory)
25 XBT_VERB("Creating a context of stack %uMb", actor->get_stacksize() / 1024 / 1024);
26 /* if the user provided a function for the process then use it, otherwise it is the context for maestro */
28 #if BOOST_VERSION < 106100
29 this->fc_ = boost::context::make_fcontext(get_stack_bottom(), actor->get_stacksize(), BoostContext::wrapper);
32 boost::context::detail::make_fcontext(get_stack_bottom(), actor->get_stacksize(), BoostContext::wrapper);
37 void BoostContext::wrapper(BoostContext::arg_type arg)
39 #if BOOST_VERSION < 106100
40 BoostContext* context = reinterpret_cast<BoostContext*>(arg);
42 BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
43 context->verify_previous_context(static_cast<BoostContext**>(arg.data)[0]);
44 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
46 smx_ctx_wrapper(context);
49 void BoostContext::swap_into_for_real(SwappedContext* to_)
51 auto* to = static_cast<BoostContext*>(to_);
52 #if BOOST_VERSION < 106100
53 boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
55 BoostContext* ctx[2] = {this, to};
56 boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
57 this->verify_previous_context(static_cast<BoostContext**>(arg.data)[0]);
58 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
62 XBT_PRIVATE ContextFactory* boost_factory()
64 XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
65 return new BoostContextFactory();
67 } // namespace simgrid::kernel::context