-/* Copyright (c) 2009-2019. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2009-2020. 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. */
/* thread-specific storage for the worker's context */
thread_local SwappedContext* SwappedContext::worker_context_ = nullptr;
-SwappedContextFactory::SwappedContextFactory() : ContextFactory(), parallel_(SIMIX_context_is_parallel())
-{
- parmap_ = nullptr; // will be created lazily with the right parameters if needed (ie, in parallel)
-}
-
SwappedContext::SwappedContext(std::function<void()>&& code, smx_actor_t actor, SwappedContextFactory* factory)
: Context(std::move(code), actor), factory_(factory)
{
// Save maestro (=context created first) in preparation for run_all
- if (not factory->parallel_ && factory->maestro_context_ == nullptr)
+ if (not SIMIX_context_is_parallel() && factory->maestro_context_ == nullptr)
factory->maestro_context_ = this;
if (has_code()) {
xbt_assert((smx_context_stack_size & 0xf) == 0, "smx_context_stack_size should be multiple of 16");
if (smx_context_guard_size > 0 && not MC_is_active()) {
-
#if !defined(PTH_STACKGROWTH) || (PTH_STACKGROWTH != -1)
xbt_die(
"Stack overflow protection is known to be broken on your system: you stacks grow upwards (or detection is "
* stuff It is much easier to understand what happens if you see the working threads as bodies that swap their soul
* for the ones of the simulated processes that must run.
*/
- if (parallel_) {
+ if (SIMIX_context_is_parallel()) {
// We lazily create the parmap so that all options are actually processed when doing so.
if (parmap_ == nullptr)
parmap_.reset(
// It only yields back to worker_context when the work array is exhausted.
// - So, resume() is only launched from the parmap for the first job of each minion.
parmap_->apply(
- [](smx_actor_t process) {
+ [](const actor::ActorImpl* process) {
SwappedContext* context = static_cast<SwappedContext*>(process->context_.get());
context->resume();
},
return;
/* maestro is already saved in the first slot of workers_context_ */
- smx_actor_t first_actor = simix_global->actors_to_run.front();
+ const actor::ActorImpl* first_actor = simix_global->actors_to_run.front();
process_index_ = 1;
/* execute the first actor; it will chain to the others when using suspend() */
static_cast<SwappedContext*>(first_actor->context_.get())->resume();
*/
void SwappedContext::resume()
{
- if (factory_->parallel_) {
+ SwappedContext* old = static_cast<SwappedContext*>(self());
+ if (SIMIX_context_is_parallel()) {
// Save my current soul (either maestro, or one of the minions) in a thread-specific area
- worker_context_ = static_cast<SwappedContext*>(self());
- // Switch my soul and the actor's one
- Context::set_current(this);
- worker_context_->swap_into(this);
- // No body runs that soul anymore at this point, but it is stored in a safe place.
- // When the executed actor will do a blocking action, ActorImpl::yield() will call suspend(), below.
- } else { // sequential execution
- SwappedContext* old = static_cast<SwappedContext*>(self());
- Context::set_current(this);
- old->swap_into(this);
+ worker_context_ = old;
}
+ // Switch my soul and the actor's one
+ Context::set_current(this);
+ old->swap_into(this);
+ // No body runs that soul anymore at this point, but it is stored in a safe place.
+ // When the executed actor will do a blocking action, ActorImpl::yield() will call suspend(), below.
}
/** The actor wants to yield back to maestro, because it is blocked in a simcall (i.e., in ActorImpl::yield())
*
* Actually, it does not really yield back to maestro, but directly into the next executable actor.
*
- * This makes the parmap::apply awkward (see ParallelUContext::run_all()) because it only apply regularly
+ * This makes the parmap::apply awkward (see SwappedContextFactory::run_all()) because it only apply regularly
* on the few first elements of the array, but it saves a lot of context switches back to maestro,
* and directly forth to the next executable actor.
*/
void SwappedContext::suspend()
{
- if (factory_->parallel_) {
+ SwappedContext* next_context;
+ if (SIMIX_context_is_parallel()) {
// Get some more work to directly swap into the next executable actor instead of yielding back to the parmap
boost::optional<smx_actor_t> next_work = factory_->parmap_->next();
- SwappedContext* next_context;
if (next_work) {
// There is a next soul to embody (ie, another executable actor)
XBT_DEBUG("Run next process");
next_context = worker_context_;
// When given that soul, the body will wait for the next scheduling round
}
-
- // Get the next soul to run, either from another actor or the initial minion's one
- Context::set_current(next_context);
- this->swap_into(next_context);
-
} else { // sequential execution
/* determine the next context */
- SwappedContext* next_context;
unsigned long int i = factory_->process_index_;
factory_->process_index_++;
XBT_DEBUG("No more actors to run");
next_context = factory_->maestro_context_;
}
- Context::set_current(next_context);
- this->swap_into(next_context);
}
+ Context::set_current(next_context);
+ this->swap_into(next_context);
}
} // namespace context
