/* 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 <utility>
+#include <functional>
+
#include "xbt/function_types.h"
#include "smx_private.h"
-#include "src/portable.h" /* loads context system definitions */
+#include "src/internal_config.h" /* loads context system definitions */
#include "xbt/swag.h"
#include "xbt/xbt_os_thread.h"
#include "src/xbt_modinter.h" /* prototype of os thread module's init/exit in XBT */
+#include "src/simix/smx_private.hpp"
#include "src/simix/ThreadContext.hpp"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
}
ThreadContext* ThreadContextFactory::create_context(
- xbt_main_func_t code, int argc, char ** argv,
- void_pfn_smxprocess_t cleanup,
- smx_process_t process)
-{
- return this->new_context<ThreadContext>(code, argc, argv, cleanup, process);
-}
-
-ThreadContext::ThreadContext(xbt_main_func_t code,
- int argc, char **argv,
- void_pfn_smxprocess_t cleanup,
- smx_process_t process)
- : Context(code, argc, argv, cleanup, process)
+ std::function<void()> code,
+ void_pfn_smxprocess_t cleanup, smx_process_t process)
{
- /* If the user provided a function for the process then use it
- otherwise is the context for maestro */
- if (code) {
- this->begin_ = xbt_os_sem_init(0);
- this->end_ = xbt_os_sem_init(0);
- if (smx_context_stack_size_was_set)
- xbt_os_thread_setstacksize(smx_context_stack_size);
- if (smx_context_guard_size_was_set)
- xbt_os_thread_setguardsize(smx_context_guard_size);
-
- /* create and start the process */
- /* NOTE: The first argument to xbt_os_thread_create used to be the process *
- * name, but now the name is stored at SIMIX level, so we pass a null */
- this->thread_ =
- xbt_os_thread_create(NULL, ThreadContext::wrapper, this, this);
-
- /* wait the starting of the newly created process */
- xbt_os_sem_acquire(this->end_);
-
- } else {
- xbt_os_thread_set_extra_data(this);
- }
+ return this->new_context<ThreadContext>(std::move(code), cleanup, process, !code);
}
void ThreadContextFactory::run_all()
return static_cast<ThreadContext*>(xbt_os_thread_get_extra_data());
}
+ThreadContext* ThreadContextFactory::attach(void_pfn_smxprocess_t cleanup_func, smx_process_t process)
+{
+ return this->new_context<ThreadContext>(
+ std::function<void()>(), cleanup_func, process, false);
+}
+
+ThreadContext* ThreadContextFactory::create_maestro(std::function<void()> code, smx_process_t process)
+{
+ return this->new_context<ThreadContext>(std::move(code), nullptr, process, true);
+}
+
+ThreadContext::ThreadContext(std::function<void()> code,
+ void_pfn_smxprocess_t cleanup, smx_process_t process, bool maestro)
+ : AttachContext(std::move(code), cleanup, process)
+{
+ // We do not need the semaphores when maestro is in main, but we create them anyway for simplicity wrt the case where maestro is externalized
+ this->begin_ = xbt_os_sem_init(0);
+ this->end_ = xbt_os_sem_init(0);
+
+ /* If the user provided a function for the process then use it */
+ if (has_code()) {
+ if (smx_context_stack_size_was_set)
+ xbt_os_thread_setstacksize(smx_context_stack_size);
+ if (smx_context_guard_size_was_set)
+ xbt_os_thread_setguardsize(smx_context_guard_size);
+
+ /* create and start the process */
+ /* NOTE: The first argument to xbt_os_thread_create used to be the process *
+ * name, but now the name is stored at SIMIX level, so we pass a null */
+ this->thread_ =
+ xbt_os_thread_create(NULL,
+ maestro ? ThreadContext::maestro_wrapper : ThreadContext::wrapper,
+ this, this);
+ /* wait the starting of the newly created process */
+ xbt_os_sem_acquire(this->end_);
+ }
+
+ /* Otherwise, we attach to the current thread */
+ else {
+ xbt_os_thread_set_extra_data(this);
+ }
+}
+
ThreadContext::~ThreadContext()
{
- /* check if this is the context of maestro (it doesn't have a real thread) */
- if (this->thread_) {
- /* wait about the thread terminason */
+ if (this->thread_) /* If there is a thread (maestro don't have any), wait for its termination */
xbt_os_thread_join(this->thread_, nullptr);
- /* destroy the synchronisation objects */
- xbt_os_sem_destroy(this->begin_);
- xbt_os_sem_destroy(this->end_);
- }
+ /* destroy the synchronization objects */
+ xbt_os_sem_destroy(this->begin_);
+ xbt_os_sem_destroy(this->end_);
}
void *ThreadContext::wrapper(void *param)
#endif
/* Tell the maestro we are starting, and wait for its green light */
xbt_os_sem_release(context->end_);
+
xbt_os_sem_acquire(context->begin_);
if (smx_ctx_thread_sem) /* parallel run */
xbt_os_sem_acquire(smx_ctx_thread_sem);
(*context)();
context->stop();
+
return nullptr;
}
+void *ThreadContext::maestro_wrapper(void *param)
+{
+ ThreadContext* context = static_cast<ThreadContext*>(param);
+
+#ifndef WIN32
+ /* Install alternate signal stack, for SIGSEGV handler. */
+ stack_t stack;
+ stack.ss_sp = sigsegv_stack;
+ stack.ss_size = sizeof sigsegv_stack;
+ stack.ss_flags = 0;
+ sigaltstack(&stack, nullptr);
+#endif
+ /* Tell the caller we are starting */
+ xbt_os_sem_release(context->end_);
+
+ // Wait for the caller to give control back to us:
+ xbt_os_sem_acquire(context->begin_);
+ (*context)();
+
+ // Tell main that we have finished:
+ xbt_os_sem_release(context->end_);
+
+ return nullptr;
+}
+
+void ThreadContext::start()
+{
+ xbt_os_sem_acquire(this->begin_);
+ if (smx_ctx_thread_sem) /* parallel run */
+ xbt_os_sem_acquire(smx_ctx_thread_sem);
+}
+
void ThreadContext::stop()
{
Context::stop();
xbt_os_sem_acquire(smx_ctx_thread_sem);
}
+void ThreadContext::attach_start()
+{
+ // 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_);
+ this->start();
+}
+
+void ThreadContext::attach_stop()
+{
+ if (smx_ctx_thread_sem)
+ xbt_os_sem_release(smx_ctx_thread_sem);
+ xbt_os_sem_release(this->end_);
+
+ ThreadContext* maestro = (ThreadContext*) simix_global->maestro_process->context;
+ xbt_os_sem_acquire(maestro->end_);
+
+ xbt_os_thread_set_extra_data(nullptr);
+}
+
}
}
