-/* Copyright (c) 2004-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2004-2022. 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 "msg_private.hpp"
+#include "simgrid/Exception.hpp"
#include "simgrid/s4u/Host.hpp"
-#include "src/simix/ActorImpl.hpp"
-#include "src/simix/smx_private.hpp"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_process, msg, "Logging specific to MSG (process)");
-
-/** @addtogroup m_process_management
- *
- * Processes (#msg_process_t) are independent agents that can do stuff on their own. They are in charge of executing
- * your code interacting with the simulated world.
- * A process may be defined as a <em>code</em> with some <em>private data</em>.
- * Processes must be located on <em>hosts</em> (#msg_host_t), and they exchange data by sending tasks (#msg_task_t)
- * that are similar to envelops containing data.
- */
+#include "src/kernel/EngineImpl.hpp"
/******************************** Process ************************************/
-/**
- * \brief Cleans the MSG data of an actor
- * \param smx_actor a SIMIX actor
- */
-void MSG_process_cleanup_from_SIMIX(smx_actor_t smx_actor)
-{
- simgrid::msg::ActorExt* msg_actor;
-
- // get the MSG process from the SIMIX process
- if (smx_actor == SIMIX_process_self()) {
- /* avoid a SIMIX request if this function is called by the process itself */
- msg_actor = (simgrid::msg::ActorExt*)SIMIX_process_self_get_data();
- SIMIX_process_self_set_data(nullptr);
- } else {
- msg_actor = (simgrid::msg::ActorExt*)smx_actor->userdata;
- simcall_process_set_data(smx_actor, nullptr);
- }
-
- if (TRACE_actor_is_enabled())
- simgrid::instr::Container::byName(instr_pid(smx_actor->ciface()))->removeFromParent();
-
- // free the data if a function was provided
- if (msg_actor && msg_actor->data && msg_global->process_data_cleanup) {
- msg_global->process_data_cleanup(msg_actor->data);
- }
-
- delete msg_actor;
- SIMIX_process_cleanup(smx_actor);
-}
-
-/* This function creates a MSG process. It has the prototype enforced by SIMIX_function_register_process_create */
-smx_actor_t MSG_process_create_from_SIMIX(const char* name, std::function<void()> code, void* data, sg_host_t host,
- std::map<std::string, std::string>* properties,
- smx_actor_t /*parent_process*/)
-{
- msg_process_t p = MSG_process_create_from_stdfunc(name, std::move(code), data, host, properties);
- return p == nullptr ? nullptr : p->getImpl();
-}
-
-/** \ingroup m_process_management
- * \brief Creates and runs a new #msg_process_t.
+/** @brief Creates and runs a new #msg_process_t.
*
* Does exactly the same as #MSG_process_create_with_arguments but without providing standard arguments
- * (\a argc, \a argv, \a start_time, \a kill_time).
- * \sa MSG_process_create_with_arguments
+ * (@a argc, @a argv, @a start_time, @a kill_time).
*/
-msg_process_t MSG_process_create(const char *name, xbt_main_func_t code, void *data, msg_host_t host)
+msg_process_t MSG_process_create(const char* name, int (*code)(int, char**), void* data, msg_host_t host)
{
- return MSG_process_create_with_environment(name, code, data, host, 0, nullptr, nullptr);
+ return MSG_process_create_with_environment(name == nullptr ? "" : name, code, data, host, 0, nullptr, nullptr);
}
-/** \ingroup m_process_management
- * \brief Creates and runs a new #msg_process_t.
+/** @brief Creates and runs a new process.
* A constructor for #msg_process_t taking four arguments and returning the corresponding object. The structure (and
* the corresponding thread) is created, and put in the list of ready process.
- * \param name a name for the object. It is for user-level information and can be nullptr.
- * \param code is a function describing the behavior of the process. It should then only use functions described
- * in \ref m_process_management (to create a new #msg_process_t for example),
- in \ref m_host_management (only the read-only functions i.e. whose name contains the word get),
- in \ref m_task_management (to create or destroy some #msg_task_t for example) and
- in \ref msg_task_usage (to handle file transfers and task processing).
- * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and
- * can be nullptr. It can be retrieved with the function \ref MSG_process_get_data.
- * \param host the location where the new process is executed.
- * \param argc first argument passed to \a code
- * \param argv second argument passed to \a code
- * \see msg_process_t
- * \return The new corresponding object.
+ * @param name a name for the object. It is for user-level information and can be nullptr.
+ * @param code is a function describing the behavior of the process.
+ * @param data a pointer to any data one may want to attach to the new object. It is for user-level information and
+ * can be nullptr. It can be retrieved with the function MSG_process_get_data().
+ * @param host the location where the new process is executed.
+ * @param argc first argument passed to @a code
+ * @param argv second argument passed to @a code
*/
-msg_process_t MSG_process_create_with_arguments(const char *name, xbt_main_func_t code, void *data, msg_host_t host,
- int argc, char **argv)
+msg_process_t MSG_process_create_with_arguments(const char* name, int (*code)(int, char**), void* data, msg_host_t host,
+ int argc, char** argv)
{
return MSG_process_create_with_environment(name, code, data, host, argc, argv, nullptr);
}
-/** \ingroup m_process_management
- * \brief Creates and runs a new #msg_process_t.
+/**
+ * @brief Creates and runs a new #msg_process_t.
* A constructor for #msg_process_t taking four arguments and returning the corresponding object. The structure (and
* the corresponding thread) is created, and put in the list of ready process.
- * \param name a name for the object. It is for user-level information and can be nullptr.
- * \param code is a function describing the behavior of the process. It should then only use functions described
- * in \ref m_process_management (to create a new #msg_process_t for example),
- in \ref m_host_management (only the read-only functions i.e. whose name contains the word get),
- in \ref m_task_management (to create or destroy some #msg_task_t for example) and
- in \ref msg_task_usage (to handle file transfers and task processing).
- * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and
- * can be nullptr. It can be retrieved with the function \ref MSG_process_get_data.
- * \param host the location where the new process is executed.
- * \param argc first argument passed to \a code
- * \param argv second argument passed to \a code. WARNING, these strings are freed by the SimGrid kernel when the
+ * @param name a name for the object. It is for user-level information and can be nullptr.
+ * @param code is a function describing the behavior of the process.
+ * @param data a pointer to any data one may want to attach to the new object. It is for user-level information and
+ * can be nullptr. It can be retrieved with the function MSG_process_get_data().
+ * @param host the location where the new process is executed.
+ * @param argc first argument passed to @a code
+ * @param argv second argument passed to @a code. WARNING, these strings are freed by the SimGrid kernel when the
* process exits, so they cannot be static nor shared between several processes.
- * \param properties list a properties defined for this process
- * \see msg_process_t
- * \return The new corresponding object.
- */
-msg_process_t MSG_process_create_with_environment(const char *name, xbt_main_func_t code, void *data, msg_host_t host,
- int argc, char **argv, xbt_dict_t properties)
-{
- std::function<void()> function;
- if (code)
- function = simgrid::xbt::wrapMain(code, argc, static_cast<const char* const*>(argv));
+ * @param properties list a properties defined for this process
+ * @see msg_process_t
+ * @return The new corresponding object.
+ */
+msg_process_t MSG_process_create_with_environment(const char* name, int (*code)(int, char**), void* data,
+ msg_host_t host, int argc, char** argv, xbt_dict_t properties)
+{
+ xbt_assert(host != nullptr, "Invalid parameters: host param must not be nullptr");
+ sg_actor_t actor = sg_actor_init(std::move(name), host);
+
+ try {
+ if (data != nullptr) {
+ sg_actor_set_data(actor, data);
+ xbt_dict_cursor_t cursor = nullptr;
+ char* key;
+ char* value;
+ xbt_dict_foreach (properties, cursor, key, value)
+ actor->set_property(key, value);
+ }
+ actor->start(std::move(simgrid::xbt::wrap_main(code, argc, argv)));
+ } catch (simgrid::HostFailureException const&) {
+ xbt_die("Could not launch a new process on failed host %s.", host->get_cname());
+ }
- std::map<std::string, std::string> props;
- xbt_dict_cursor_t cursor = nullptr;
- char* key;
- char* value;
- xbt_dict_foreach (properties, cursor, key, value)
- props[key] = value;
xbt_dict_free(&properties);
-
- msg_process_t res = MSG_process_create_from_stdfunc(name, std::move(function), data, host, &props);
for (int i = 0; i != argc; ++i)
xbt_free(argv[i]);
xbt_free(argv);
- return res;
-}
-
-msg_process_t MSG_process_create_from_stdfunc(const char* name, std::function<void()> code, void* data, msg_host_t host,
- std::map<std::string, std::string>* properties)
-{
- xbt_assert(code != nullptr && host != nullptr, "Invalid parameters: host and code params must not be nullptr");
- simgrid::msg::ActorExt* msgExt = new simgrid::msg::ActorExt(data);
-
- smx_actor_t process = simcall_process_create(name, std::move(code), msgExt, host, properties);
- if (not process) { /* Undo everything */
- delete msgExt;
- return nullptr;
- }
-
- simcall_process_on_exit(process, (int_f_pvoid_pvoid_t)TRACE_msg_process_kill, process);
- return process->ciface();
-}
-
-/* Become a process in the simulation
- *
- * Currently this can only be called by the main thread (once) and only work with some thread factories
- * (currently ThreadContextFactory).
- *
- * In the future, it might be extended in order to attach other threads created by a third party library.
- */
-msg_process_t MSG_process_attach(const char *name, void *data, msg_host_t host, xbt_dict_t properties)
-{
- xbt_assert(host != nullptr, "Invalid parameters: host and code params must not be nullptr");
- std::map<std::string, std::string> props;
- xbt_dict_cursor_t cursor = nullptr;
- char* key;
- char* value;
- xbt_dict_foreach (properties, cursor, key, value)
- props[key] = value;
- xbt_dict_free(&properties);
-
- /* Let's create the process: SIMIX may decide to start it right now, even before returning the flow control to us */
- smx_actor_t process = SIMIX_process_attach(name, new simgrid::msg::ActorExt(data), host->getCname(), &props, nullptr);
- if (not process)
- xbt_die("Could not attach");
- simcall_process_on_exit(process,(int_f_pvoid_pvoid_t)TRACE_msg_process_kill,process);
- return process->ciface();
-}
-
-/** Detach a process attached with `MSG_process_attach()`
- *
- * This is called when the current process has finished its job.
- * Used in the main thread, it waits for the simulation to finish before returning. When it returns, the other
- * simulated processes and the maestro are destroyed.
- */
-void MSG_process_detach()
-{
- SIMIX_process_detach();
+ simgrid::s4u::this_actor::yield();
+ return actor;
}
-/** Yield the current actor; let the other actors execute first */
-void MSG_process_yield()
-{
- simgrid::simix::kernelImmediate([] { /* do nothing*/ });
-}
-
-/** \ingroup m_process_management
- * \brief Returns the user data of a process.
- *
- * This function checks whether \a process is a valid pointer and returns the user data associated to this process.
- */
-void* MSG_process_get_data(msg_process_t process)
-{
- xbt_assert(process != nullptr, "Invalid parameter: first parameter must not be nullptr!");
-
- /* get from SIMIX the MSG process data, and then the user data */
- simgrid::msg::ActorExt* msgExt = (simgrid::msg::ActorExt*)process->getImpl()->userdata;
- if (msgExt)
- return msgExt->data;
- else
- return nullptr;
-}
-
-/** \ingroup m_process_management
- * \brief Sets the user data of a process.
- *
- * This function checks whether \a process is a valid pointer and sets the user data associated to this process.
- */
-msg_error_t MSG_process_set_data(msg_process_t process, void *data)
-{
- xbt_assert(process != nullptr, "Invalid parameter: first parameter must not be nullptr!");
-
- static_cast<simgrid::msg::ActorExt*>(process->getImpl()->userdata)->data = data;
-
- return MSG_OK;
-}
-
-/** \ingroup m_process_management
- * \brief Sets a cleanup function to be called to free the userdata of a process when a process is destroyed.
- * \param data_cleanup a cleanup function for the userdata of a process, or nullptr to call no function
+/** @brief Sets a cleanup function to be called to free the userdata of a process when a process is destroyed.
+ * @param data_cleanup a cleanup function for the userdata of a process, or nullptr to call no function
*/
XBT_PUBLIC void MSG_process_set_data_cleanup(void_f_pvoid_t data_cleanup)
{
msg_global->process_data_cleanup = data_cleanup;
}
-
-/** \ingroup m_process_management
- *
- * \brief Return a #msg_process_t given its PID.
- *
- * This function search in the list of all the created msg_process_t for a msg_process_t whose PID is equal to \a PID.
- * If no host is found, \c nullptr is returned.
- Note that the PID are uniq in the whole simulation, not only on a given host.
- */
-msg_process_t MSG_process_from_PID(int PID)
-{
- return SIMIX_process_from_PID(PID)->ciface();
-}
-
-/** @brief returns a list of all currently existing processes */
-xbt_dynar_t MSG_processes_as_dynar() {
- xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t), nullptr);
- for (auto const& kv : simix_global->process_list) {
- smx_actor_t actor = kv.second;
- xbt_dynar_push(res, &actor);
- }
- return res;
-}
-
-/** @brief Return the current number MSG processes. */
-int MSG_process_get_number()
-{
- return SIMIX_process_count();
-}
-
-/** \ingroup m_process_management
- * \brief Return the PID of the current process.
- *
- * This function returns the PID of the currently running #msg_process_t.
- */
-int MSG_process_self_PID()
-{
- smx_actor_t self = SIMIX_process_self();
- return self == nullptr ? 0 : self->pid;
-}
-
-/** \ingroup m_process_management
- * \brief Return the PPID of the current process.
- *
- * This function returns the PID of the parent of the currently running #msg_process_t.
- */
-int MSG_process_self_PPID()
-{
- return MSG_process_get_PPID(MSG_process_self());
-}
-
-/** \ingroup m_process_management
- * \brief Return the name of the current process.
- */
-const char* MSG_process_self_name()
-{
- return SIMIX_process_self_get_name();
-}
-
-/** \ingroup m_process_management
- * \brief Return the current process.
- *
- * This function returns the currently running #msg_process_t.
- */
-msg_process_t MSG_process_self()
-{
- return SIMIX_process_self()->ciface();
-}
-
-smx_context_t MSG_process_get_smx_ctx(msg_process_t process) { // deprecated -- smx_context_t should die afterward
- return process->getImpl()->context;
-}
-/**
- * \ingroup m_process_management
- * \brief Add a function to the list of "on_exit" functions for the current process.
- * The on_exit functions are the functions executed when your process is killed.
- * You should use them to free the data used by your process.
- */
-void MSG_process_on_exit(int_f_pvoid_pvoid_t fun, void *data) {
- simcall_process_on_exit(SIMIX_process_self(), fun, data);
-}
-/**
- * \ingroup m_process_management
- * \brief Sets the "auto-restart" flag of the process.
- * If the flag is set to 1, the process will be automatically restarted when its host comes back up.
- */
-XBT_PUBLIC void MSG_process_auto_restart_set(msg_process_t process, int auto_restart)
-{
- process->setAutoRestart(auto_restart);
-}
-
-/** @ingroup m_process_management
- * @brief Take an extra reference on that process to prevent it to be garbage-collected
- */
-XBT_PUBLIC void MSG_process_ref(msg_process_t process)
-{
- intrusive_ptr_add_ref(process);
-}
-/** @ingroup m_process_management
- * @brief Release a reference on that process so that it can get be garbage-collected
- */
-XBT_PUBLIC void MSG_process_unref(msg_process_t process)
-{
- intrusive_ptr_release(process);
-}