-/* Copyright (c) 2007-2022. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2007-2023. 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. */
-#include "mc/mc.h"
+#include "src/mc/mc.h"
+#include "simgrid/Exception.hpp"
#include "simgrid/s4u/Host.hpp"
#include "src/kernel/activity/CommImpl.hpp"
#include "src/kernel/context/Context.hpp"
-#include "src/surf/surf_interface.hpp"
+#include "src/sthread/sthread.h"
#include <vector>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_context, kernel, "Context switching mechanism");
-namespace simgrid {
-namespace kernel {
-namespace context {
+namespace simgrid::kernel::context {
-ContextFactoryInitializer factory_initializer = nullptr;
-static e_xbt_parmap_mode_t parallel_synchronization_mode = XBT_PARMAP_DEFAULT;
-static int parallel_contexts = 1;
-unsigned stack_size;
-unsigned guard_size;
-
-/** @brief Returns whether some parallel threads are used for the user contexts. */
-int is_parallel()
-{
- return parallel_contexts > 1;
-}
-
-/**
- * @brief Returns the number of parallel threads used for the user contexts.
- * @return the number of threads (1 means no parallelism)
- */
-int get_nthreads()
-{
- return parallel_contexts;
-}
-
-/**
- * @brief Sets the number of parallel threads to use for the user contexts.
- *
- * This function should be called before initializing SIMIX.
- * A value of 1 means no parallelism (1 thread only).
- * If the value is greater than 1, the thread support must be enabled.
- *
- * @param nb_threads the number of threads to use
- */
-void set_nthreads(int nb_threads)
+void Context::set_nthreads(int nb_threads)
{
if (nb_threads <= 0) {
nb_threads = std::thread::hardware_concurrency();
XBT_INFO("Auto-setting contexts/nthreads to %d", nb_threads);
}
- parallel_contexts = nb_threads;
-}
-
-/**
- * @brief Sets the synchronization mode to use when actors are run in parallel.
- * @param mode how to synchronize threads if actors are run in parallel
- */
-void set_parallel_mode(e_xbt_parmap_mode_t mode)
-{
- parallel_synchronization_mode = mode;
-}
-
-/**
- * @brief Returns the synchronization mode used when actors are run in parallel.
- * @return how threads are synchronized if actors are run in parallel
- */
-e_xbt_parmap_mode_t get_parallel_mode()
-{
- return parallel_synchronization_mode;
+ Context::parallel_contexts = nb_threads;
}
ContextFactory::~ContextFactory() = default;
+e_xbt_parmap_mode_t Context::parallel_mode = XBT_PARMAP_DEFAULT;
+int Context::parallel_contexts = 1;
+unsigned Context::stack_size;
+unsigned Context::guard_size;
thread_local Context* Context::current_context_ = nullptr;
-#ifndef WIN32
/* Install or disable alternate signal stack, for SIGSEGV handler. */
-int Context::install_sigsegv_stack(stack_t* old_stack, bool enable)
+int Context::install_sigsegv_stack(bool enable)
{
static std::vector<unsigned char> sigsegv_stack(SIGSTKSZ);
stack_t stack;
stack.ss_sp = sigsegv_stack.data();
stack.ss_size = sigsegv_stack.size();
stack.ss_flags = enable ? 0 : SS_DISABLE;
- return sigaltstack(&stack, old_stack);
+ return sigaltstack(&stack, nullptr);
}
-#endif
Context* Context::self()
{
current_context_ = self;
}
-void Context::declare_context(std::size_t size)
-{
-#if SIMGRID_HAVE_MC
- /* Store the address of the stack in heap to compare it apart of heap comparison */
- if(MC_is_active())
- MC_ignore_heap(this, size);
-#endif
-}
-
Context* ContextFactory::attach(actor::ActorImpl*)
{
xbt_die("Cannot attach with this ContextFactory.\n"
void Context::stop()
{
- this->actor_->cleanup();
+ this->actor_->cleanup_from_self();
+ sthread_disable();
+ throw ForcefulKillException(); // clean RAII variables with the dedicated exception
}
-
AttachContext::~AttachContext() = default;
-} // namespace context
-} // namespace kernel
-} // namespace simgrid
+} // namespace simgrid::kernel::context
