X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3f6cb16e7427d1583ab346042e2f27f7cd95f2b8..3baaf982217fbc818965e8ed71c3ec91e96844d5:/src/kernel/context/ContextBoost.cpp diff --git a/src/kernel/context/ContextBoost.cpp b/src/kernel/context/ContextBoost.cpp index ea98813fd4..e229a5c115 100644 --- a/src/kernel/context/ContextBoost.cpp +++ b/src/kernel/context/ContextBoost.cpp @@ -1,4 +1,4 @@ -/* Copyright (c) 2015-2018. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2015-2019. 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. */ @@ -15,66 +15,27 @@ namespace kernel { namespace context { // BoostContextFactory - -BoostContextFactory::BoostContextFactory() - : ContextFactory("BoostContextFactory"), parallel_(SIMIX_context_is_parallel()) -{ - BoostContext::set_maestro(nullptr); - if (parallel_) { -#if HAVE_THREAD_CONTEXTS - ParallelBoostContext::initialize(); -#else - xbt_die("No thread support for parallel context execution"); -#endif - } -} - -BoostContextFactory::~BoostContextFactory() -{ -#if HAVE_THREAD_CONTEXTS - if (parallel_) - ParallelBoostContext::finalize(); -#endif -} - smx_context_t BoostContextFactory::create_context(std::function code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process) { -#if HAVE_THREAD_CONTEXTS - if (parallel_) - return this->new_context(std::move(code), cleanup_func, process); -#endif - - return this->new_context(std::move(code), cleanup_func, process); -} - -void BoostContextFactory::run_all() -{ -#if HAVE_THREAD_CONTEXTS - if (parallel_) - ParallelBoostContext::run_all(); - else -#endif - SerialBoostContext::run_all(); + return this->new_context(std::move(code), cleanup_func, process, this); } // BoostContext -BoostContext* BoostContext::maestro_context_ = nullptr; - -BoostContext::BoostContext(std::function code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process) - : Context(std::move(code), cleanup_func, process) +BoostContext::BoostContext(std::function code, void_pfn_smxprocess_t cleanup_func, smx_actor_t actor, + SwappedContextFactory* factory) + : SwappedContext(std::move(code), cleanup_func, actor, factory) { /* if the user provided a function for the process then use it, otherwise it is the context for maestro */ if (has_code()) { - this->stack_ = SIMIX_context_stack_new(); /* We need to pass the bottom of the stack to make_fcontext, depending on the stack direction it may be the lower or higher address: */ #if PTH_STACKGROWTH == -1 - void* stack = static_cast(this->stack_) + smx_context_usable_stack_size; + void* stack = static_cast(get_stack()) + smx_context_usable_stack_size; #else - void* stack = this->stack_; + void* stack = get_stack(); #endif ASAN_ONLY(this->asan_stack_ = stack); #if BOOST_VERSION < 106100 @@ -82,24 +43,20 @@ BoostContext::BoostContext(std::function code, void_pfn_smxprocess_t cle #else this->fc_ = boost::context::detail::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper); #endif + } else { #if BOOST_VERSION < 105600 this->fc_ = new boost::context::fcontext_t(); #endif - if (BoostContext::maestro_context_ == nullptr) - BoostContext::maestro_context_ = this; } } BoostContext::~BoostContext() { #if BOOST_VERSION < 105600 - if (not this->stack_) + if (not get_stack()) delete this->fc_; #endif - if (this == maestro_context_) - maestro_context_ = nullptr; - SIMIX_context_stack_delete(this->stack_); } void BoostContext::wrapper(BoostContext::arg_type arg) @@ -125,135 +82,25 @@ void BoostContext::wrapper(BoostContext::arg_type arg) context->suspend(); } -inline void BoostContext::swap(BoostContext* from, BoostContext* to) +void BoostContext::swap_into(SwappedContext* to_) { + BoostContext* to = static_cast(to_); #if BOOST_VERSION < 105600 - boost::context::jump_fcontext(from->fc_, to->fc_, reinterpret_cast(to)); + boost::context::jump_fcontext(this->fc_, to->fc_, reinterpret_cast(to)); #elif BOOST_VERSION < 106100 - boost::context::jump_fcontext(&from->fc_, to->fc_, reinterpret_cast(to)); + boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast(to)); #else - BoostContext* ctx[2] = {from, to}; + BoostContext* ctx[2] = {this, to}; ASAN_ONLY(void* fake_stack = nullptr); - ASAN_ONLY(to->asan_ctx_ = from); - ASAN_START_SWITCH(from->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_); + ASAN_ONLY(to->asan_ctx_ = this); + ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_); boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx); - ASAN_ONLY(xbt_assert(from->asan_ctx_ == static_cast(arg.data)[0])); - ASAN_FINISH_SWITCH(fake_stack, &from->asan_ctx_->asan_stack_, &from->asan_ctx_->asan_stack_size_); + ASAN_ONLY(xbt_assert(this->asan_ctx_ == static_cast(arg.data)[0])); + ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_); static_cast(arg.data)[0]->fc_ = arg.fctx; #endif } -void BoostContext::stop() -{ - Context::stop(); - throw StopRequest(); -} - -// SerialBoostContext - -unsigned long SerialBoostContext::process_index_; - -void SerialBoostContext::suspend() -{ - /* determine the next context */ - SerialBoostContext* next_context; - unsigned long int i = process_index_; - process_index_++; - - if (i < simix_global->process_to_run.size()) { - /* execute the next process */ - XBT_DEBUG("Run next process"); - next_context = static_cast(simix_global->process_to_run[i]->context_); - } else { - /* all processes were run, return to maestro */ - XBT_DEBUG("No more process to run"); - next_context = static_cast(BoostContext::get_maestro()); - } - SIMIX_context_set_current(next_context); - BoostContext::swap(this, next_context); -} - -void SerialBoostContext::resume() -{ - SIMIX_context_set_current(this); - BoostContext::swap(BoostContext::get_maestro(), this); -} - -void SerialBoostContext::run_all() -{ - if (simix_global->process_to_run.empty()) - return; - smx_actor_t first_process = simix_global->process_to_run.front(); - process_index_ = 1; - /* execute the first process */ - static_cast(first_process->context_)->resume(); -} - -// ParallelBoostContext - -#if HAVE_THREAD_CONTEXTS - -simgrid::xbt::Parmap* ParallelBoostContext::parmap_; -std::atomic ParallelBoostContext::threads_working_; -thread_local uintptr_t ParallelBoostContext::worker_id_; -std::vector ParallelBoostContext::workers_context_; - -void ParallelBoostContext::initialize() -{ - parmap_ = nullptr; - workers_context_.clear(); - workers_context_.resize(SIMIX_context_get_nthreads(), nullptr); -} - -void ParallelBoostContext::finalize() -{ - delete parmap_; - parmap_ = nullptr; - workers_context_.clear(); -} - -void ParallelBoostContext::run_all() -{ - threads_working_ = 0; - if (parmap_ == nullptr) - parmap_ = new simgrid::xbt::Parmap(SIMIX_context_get_nthreads(), SIMIX_context_get_parallel_mode()); - parmap_->apply( - [](smx_actor_t process) { - ParallelBoostContext* context = static_cast(process->context_); - context->resume(); - }, - simix_global->process_to_run); -} - -void ParallelBoostContext::suspend() -{ - boost::optional next_work = parmap_->next(); - ParallelBoostContext* next_context; - if (next_work) { - XBT_DEBUG("Run next process"); - next_context = static_cast(next_work.get()->context_); - } else { - XBT_DEBUG("No more processes to run"); - next_context = workers_context_[worker_id_]; - } - - SIMIX_context_set_current(next_context); - BoostContext::swap(this, next_context); -} - -void ParallelBoostContext::resume() -{ - worker_id_ = threads_working_.fetch_add(1, std::memory_order_relaxed); - - ParallelBoostContext* worker_context = static_cast(SIMIX_context_self()); - workers_context_[worker_id_] = worker_context; - - SIMIX_context_set_current(this); - BoostContext::swap(worker_context, this); -} - -#endif - XBT_PRIVATE ContextFactory* boost_factory() { XBT_VERB("Using Boost contexts. Welcome to the 21th century.");