-/* Copyright (c) 2009-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2009-2018. 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 "src/simix/smx_private.hpp"
#include "src/xbt_modinter.h" /* prototype of os thread module's init/exit in XBT */
#include "xbt/function_types.h"
-#include "xbt/swag.h"
#include "xbt/xbt_os_thread.h"
#include "src/kernel/context/ContextThread.hpp"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
-static xbt_os_sem_t smx_ctx_thread_sem = nullptr;
-
namespace simgrid {
namespace kernel {
namespace context {
-XBT_PRIVATE ContextFactory* thread_factory()
-{
- XBT_VERB("Activating thread context factory");
- return new ThreadContextFactory();
-}
+// ThreadContextFactory
ThreadContextFactory::ThreadContextFactory()
- : ContextFactory("ThreadContextFactory")
+ : ContextFactory("ThreadContextFactory"), parallel_(SIMIX_context_is_parallel())
{
- if (SIMIX_context_is_parallel()) {
- smx_ctx_thread_sem = xbt_os_sem_init(SIMIX_context_get_nthreads());
- } else {
- smx_ctx_thread_sem = nullptr;
- }
+ if (parallel_)
+ ParallelThreadContext::initialize();
}
ThreadContextFactory::~ThreadContextFactory()
{
- if (smx_ctx_thread_sem) {
- xbt_os_sem_destroy(smx_ctx_thread_sem);
- smx_ctx_thread_sem = nullptr;
- }
+ if (parallel_)
+ ParallelThreadContext::finalize();
}
-ThreadContext* ThreadContextFactory::create_context(
- std::function<void()> code,
- void_pfn_smxprocess_t cleanup, smx_actor_t process)
+ThreadContext* ThreadContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup,
+ smx_actor_t process, bool maestro)
{
- return this->new_context<ThreadContext>(std::move(code), cleanup, process, not code);
+ if (parallel_)
+ return this->new_context<ParallelThreadContext>(std::move(code), cleanup, process, maestro);
+ else
+ return this->new_context<SerialThreadContext>(std::move(code), cleanup, process, maestro);
}
void ThreadContextFactory::run_all()
{
- if (smx_ctx_thread_sem == nullptr) {
- // Serial execution
- for (smx_actor_t const& process : simix_global->process_to_run) {
- XBT_DEBUG("Handling %p",process);
- ThreadContext* context = static_cast<ThreadContext*>(process->context);
- xbt_os_sem_release(context->begin_);
- xbt_os_sem_acquire(context->end_);
- }
- } else {
+ if (parallel_) {
// Parallel execution
- for (smx_actor_t const& process : simix_global->process_to_run)
- xbt_os_sem_release(static_cast<ThreadContext*>(process->context)->begin_);
- for (smx_actor_t const& process : simix_global->process_to_run)
- xbt_os_sem_acquire(static_cast<ThreadContext*>(process->context)->end_);
+ ParallelThreadContext::run_all();
+ } else {
+ // Serial execution
+ SerialThreadContext::run_all();
}
}
-ThreadContext* ThreadContextFactory::self()
-{
- return static_cast<ThreadContext*>(xbt_os_thread_get_extra_data());
-}
-
-ThreadContext* ThreadContextFactory::attach(void_pfn_smxprocess_t cleanup_func, smx_actor_t process)
-{
- return this->new_context<ThreadContext>(
- std::function<void()>(), cleanup_func, process, false);
-}
-
-ThreadContext* ThreadContextFactory::create_maestro(std::function<void()> code, smx_actor_t process)
-{
- return this->new_context<ThreadContext>(std::move(code), nullptr, process, true);
-}
+// ThreadContext
ThreadContext::ThreadContext(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t process,
bool maestro)
try {
(*context)();
- if (not context->is_maestro_) // really?
+ if (not context->isMaestro()) // really?
context->Context::stop();
} catch (StopRequest const&) {
XBT_DEBUG("Caught a StopRequest");
- xbt_assert(not context->is_maestro_, "I'm not supposed to be maestro here.");
+ xbt_assert(not context->isMaestro(), "I'm not supposed to be maestro here.");
}
// Signal to the caller (normally the maestro) that we have finished:
return nullptr;
}
+void ThreadContext::release()
+{
+ xbt_os_sem_release(this->begin_);
+}
+
+void ThreadContext::wait()
+{
+ xbt_os_sem_acquire(this->end_);
+}
+
void ThreadContext::start()
{
xbt_os_sem_acquire(this->begin_);
- if (not is_maestro_ && smx_ctx_thread_sem) /* parallel run */
- xbt_os_sem_acquire(smx_ctx_thread_sem);
+ this->start_hook();
}
void ThreadContext::yield()
{
- if (not is_maestro_ && smx_ctx_thread_sem) /* parallel run */
- xbt_os_sem_release(smx_ctx_thread_sem);
+ this->yield_hook();
xbt_os_sem_release(this->end_);
}
// We're breaking the layers here by depending on the upper layer:
ThreadContext* maestro = (ThreadContext*) simix_global->maestro_process->context;
xbt_os_sem_release(maestro->begin_);
- xbt_assert(not this->is_maestro_);
+ xbt_assert(not this->isMaestro());
this->start();
}
void ThreadContext::attach_stop()
{
- xbt_assert(not this->is_maestro_);
+ xbt_assert(not this->isMaestro());
this->yield();
ThreadContext* maestro = (ThreadContext*) simix_global->maestro_process->context;
xbt_os_thread_set_extra_data(nullptr);
}
+// SerialThreadContext
+
+void SerialThreadContext::run_all()
+{
+ for (smx_actor_t const& process : simix_global->process_to_run) {
+ XBT_DEBUG("Handling %p", process);
+ ThreadContext* context = static_cast<ThreadContext*>(process->context);
+ context->release();
+ context->wait();
+ }
+}
+
+// ParallelThreadContext
+
+xbt_os_sem_t ParallelThreadContext::thread_sem_ = nullptr;
+
+void ParallelThreadContext::initialize()
+{
+ thread_sem_ = xbt_os_sem_init(SIMIX_context_get_nthreads());
+}
+
+void ParallelThreadContext::finalize()
+{
+ xbt_os_sem_destroy(thread_sem_);
+ thread_sem_ = nullptr;
+}
+
+void ParallelThreadContext::run_all()
+{
+ for (smx_actor_t const& process : simix_global->process_to_run)
+ static_cast<ThreadContext*>(process->context)->release();
+ for (smx_actor_t const& process : simix_global->process_to_run)
+ static_cast<ThreadContext*>(process->context)->wait();
+}
+
+void ParallelThreadContext::start_hook()
+{
+ if (not isMaestro()) /* parallel run */
+ xbt_os_sem_acquire(thread_sem_);
+}
+
+void ParallelThreadContext::yield_hook()
+{
+ if (not isMaestro()) /* parallel run */
+ xbt_os_sem_release(thread_sem_);
+}
+
+XBT_PRIVATE ContextFactory* thread_factory()
+{
+ XBT_VERB("Activating thread context factory");
+ return new ThreadContextFactory();
+}
}}} // namespace