-/* 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 <csignal>
#include <functional>
-namespace simgrid {
-namespace kernel {
-namespace context {
-extern unsigned stack_size;
-extern unsigned guard_size;
+namespace simgrid::kernel::context {
class XBT_PUBLIC ContextFactory {
public:
virtual void run_all(std::vector<actor::ActorImpl*> const& actors_list) = 0;
- /* This allows Java to hijack the context factory (Java induces factories of factory :) */
- static std::function<ContextFactory*(void)> initializer;
-
protected:
template <class T, class... Args> T* new_context(Args&&... args)
{
auto* context = new T(std::forward<Args>(args)...);
- context->declare_context(sizeof(T));
return context;
}
};
class XBT_PUBLIC Context {
friend ContextFactory;
+ static int parallel_contexts;
static thread_local Context* current_context_;
std::function<void()> code_;
actor::ActorImpl* actor_ = nullptr;
bool is_maestro_;
- void declare_context(std::size_t size);
public:
-#ifndef WIN32
- static int install_sigsegv_stack(stack_t* old_stack, bool enable);
-#endif
+ static e_xbt_parmap_mode_t parallel_mode;
+ static unsigned stack_size;
+ static unsigned guard_size;
+
+ static int install_sigsegv_stack(bool enable);
Context(std::function<void()>&& code, actor::ActorImpl* actor, bool maestro);
Context(const Context&) = delete;
bool has_code() const { return static_cast<bool>(code_); }
actor::ActorImpl* get_actor() const { return this->actor_; }
+ /** @brief Returns whether some parallel threads are used for the user contexts. */
+ static bool is_parallel() { return parallel_contexts > 1; }
+ /** @brief Returns the number of parallel threads used for the user contexts (1 means no parallelism). */
+ static 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.
+ * If the value is less than 1, the optimal number of threads is chosen automatically.
+ *
+ * @param nb_threads the number of threads to use
+ */
+ static void set_nthreads(int nb_threads);
+
// Scheduling methods
virtual void stop();
virtual void suspend() = 0;
XBT_PRIVATE ContextFactory* raw_factory();
XBT_PRIVATE ContextFactory* boost_factory();
-XBT_PUBLIC bool is_parallel();
-XBT_PUBLIC int get_nthreads();
-XBT_PUBLIC void set_nthreads(int nb_threads);
-XBT_PUBLIC void set_parallel_mode(e_xbt_parmap_mode_t mode);
-XBT_PUBLIC e_xbt_parmap_mode_t get_parallel_mode();
-} // namespace context
-} // namespace kernel
-} // namespace simgrid
+} // namespace simgrid::kernel::context
#endif