1 /* Copyright (c) 2006-2018. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_S4U_ACTOR_HPP
7 #define SIMGRID_S4U_ACTOR_HPP
10 #include <map> // deprecated wrappers
11 #include <simgrid/chrono.hpp>
12 #include <unordered_map>
13 #include <xbt/Extendable.hpp>
14 #include <xbt/functional.hpp>
15 #include <xbt/signal.hpp>
16 #include <xbt/string.hpp>
23 * An actor is an independent stream of execution in your distributed application.
25 * You can think of an actor as a process in your distributed application, or as a thread in a multithreaded program.
26 * This is the only component in SimGrid that actually does something on its own, executing its own code.
27 * A resource will not get used if you don't schedule activities on them. This is the code of Actors that create and
28 * schedule these activities.
30 * An actor is located on a (simulated) host, but it can interact
31 * with the whole simulated platform.
33 * The s4u::Actor API is strongly inspired from the C++11 threads.
34 * The <a href="http://en.cppreference.com/w/cpp/thread">documentation
35 * of this standard</a> may help to understand the philosophy of the S4U
38 * @section s4u_actor_def Defining the skeleton of an Actor
40 * As in the <a href="http://en.cppreference.com/w/cpp/thread">C++11
41 * standard</a>, you can declare the code of your actor either as a
42 * pure function or as an object. It is very simple with functions:
45 * #include <simgrid/s4u/actor.hpp>
47 * // Declare the code of your worker
49 * printf("Hello s4u");
50 * simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
53 * // From your main or from another actor, create your actor on the host Jupiter
54 * // The following line actually creates a new actor, even if there is no "new".
55 * Actor("Alice", simgrid::s4u::Host::by_name("Jupiter"), worker);
58 * But some people prefer to encapsulate their actors in classes and
59 * objects to save the actor state in a cleanly dedicated location.
60 * The syntax is slightly more complicated, but not much.
63 * #include <simgrid/s4u/actor.hpp>
65 * // Declare the class representing your actors
68 * void operator()() { // Two pairs of () because this defines the method called ()
69 * printf("Hello s4u");
70 * simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
74 * // From your main or from another actor, create your actor. Note the () after Worker
75 * Actor("Bob", simgrid::s4u::Host::by_name("Jupiter"), Worker());
78 * @section s4u_actor_flesh Fleshing your actor
80 * The body of your actor can use the functions of the
81 * simgrid::s4u::this_actor namespace to interact with the world.
82 * This namespace contains the methods to start new activities
83 * (executions, communications, etc), and to get informations about
84 * the currently running thread (its location, etc).
86 * Please refer to the @link simgrid::s4u::this_actor full API @endlink.
89 * @section s4u_actor_deploy Using a deployment file
91 * @warning This is currently not working with S4U. Sorry about that.
93 * The best practice is to use an external deployment file as
94 * follows, because it makes it easier to test your application in
95 * differing settings. Load this file with
96 * s4u::Engine::loadDeployment() before the simulation starts.
97 * Refer to the @ref deployment section for more information.
100 * <?xml version='1.0'?>
101 * <!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
102 * <platform version="4">
104 * <!-- Start an actor called 'master' on the host called 'Tremblay' -->
105 * <actor host="Tremblay" function="master">
106 * <!-- Here come the parameter that you want to feed to this instance of master -->
107 * <argument value="20"/> <!-- argv[1] -->
108 * <argument value="50000000"/> <!-- argv[2] -->
109 * <argument value="1000000"/> <!-- argv[3] -->
110 * <argument value="5"/> <!-- argv[4] -->
113 * <!-- Start an actor called 'worker' on the host called 'Jupiter' -->
114 * <actor host="Jupiter" function="worker"/> <!-- Don't provide any parameter ->>
122 /** @brief Simulation Agent */
123 class XBT_PUBLIC Actor : public simgrid::xbt::Extendable<Actor> {
127 friend simgrid::kernel::actor::ActorImpl;
128 friend simgrid::kernel::activity::MailboxImpl;
130 kernel::actor::ActorImpl* pimpl_ = nullptr;
132 /** Wrap a (possibly non-copyable) single-use task into a `std::function` */
133 template<class F, class... Args>
134 static std::function<void()> wrap_task(F f, Args... args)
136 typedef decltype(f(std::move(args)...)) R;
137 auto task = std::make_shared<simgrid::xbt::Task<R()>>(simgrid::xbt::make_task(std::move(f), std::move(args)...));
138 return [task] { (*task)(); };
141 explicit Actor(smx_actor_t pimpl) : pimpl_(pimpl) {}
145 // ***** No copy *****
146 Actor(Actor const&) = delete;
147 Actor& operator=(Actor const&) = delete;
149 // ***** Reference count *****
150 friend XBT_PUBLIC void intrusive_ptr_add_ref(Actor * actor);
151 friend XBT_PUBLIC void intrusive_ptr_release(Actor * actor);
153 // ***** Actor creation *****
154 /** Retrieve a reference to myself */
155 static ActorPtr self();
157 /** Signal to others that a new actor has been created **/
158 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_creation;
159 /** Signal to others that an actor has been suspended**/
160 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_suspend;
161 /** Signal to others that an actor has been resumed **/
162 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_resume;
163 /** Signal to others that an actor is sleeping **/
164 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_sleep;
165 /** Signal to others that an actor wakes up for a sleep **/
166 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_wake_up;
167 /** Signal to others that an actor is going to migrated to another host**/
168 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_migration_start;
169 /** Signal to others that an actor is has been migrated to another host **/
170 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_migration_end;
171 /** Signal indicating that the given actor is about to disappear */
172 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_destruction;
174 /** Create an actor from a std::function
176 * If the actor is restarted, the actor has a fresh copy of the function.
178 static ActorPtr create(std::string name, s4u::Host* host, std::function<void()> code);
180 /** Create an actor from a std::function
182 * If the actor is restarted, the actor has a fresh copy of the function.
184 static ActorPtr create(std::string name, s4u::Host* host, std::function<void(std::vector<std::string>*)> code,
185 std::vector<std::string>* args)
187 return create(name, host, [code](std::vector<std::string>* args) { code(args); }, args);
190 /** Create an actor using code
192 * Using this constructor, move-only type can be used. The consequence is
193 * that we cannot copy the value and restart the actor in its initial
194 * state. In order to use auto-restart, an explicit `function` must be passed
197 template <class F, class... Args,
198 // This constructor is enabled only if the call code(args...) is valid:
199 typename = typename std::result_of<F(Args...)>::type>
200 static ActorPtr create(std::string name, s4u::Host* host, F code, Args... args)
202 return create(name, host, wrap_task(std::move(code), std::move(args)...));
205 // Create actor from function name:
206 static ActorPtr create(std::string name, s4u::Host* host, std::string function, std::vector<std::string> args);
208 // ***** Methods *****
209 /** This actor will be automatically terminated when the last non-daemon actor finishes **/
212 /** Returns whether or not this actor has been daemonized or not **/
213 bool is_daemon() const;
215 /** Retrieves the name of that actor as a C++ string */
216 const simgrid::xbt::string& get_name() const;
217 /** Retrieves the name of that actor as a C string */
218 const char* get_cname() const;
219 /** Retrieves the host on which that actor is running */
220 s4u::Host* get_host();
221 /** Retrieves the PID of that actor
223 * aid_t is an alias for long */
224 aid_t get_pid() const;
225 /** Retrieves the PPID of that actor
227 * aid_t is an alias for long */
228 aid_t get_ppid() const;
230 /** Suspend an actor by suspending the task on which it was waiting for the completion. */
233 /** Resume a suspended actor by resuming the task on which it was waiting for the completion. */
238 /** Returns true if the actor is suspended. */
241 /** If set to true, the actor will automatically restart when its host reboots */
242 void set_auto_restart(bool autorestart);
244 /** Add a function to the list of "on_exit" functions for the current actor. The on_exit functions are the functions
245 * executed when your actor is killed. You should use them to free the data used by your actor.
247 void on_exit(std::function<void(int, void*)> fun, void* data);
249 /** Sets the time at which that actor should be killed */
250 void set_kill_time(double time);
251 /** Retrieves the time at which that actor will be killed (or -1 if not set) */
252 double get_kill_time();
254 /** @brief Moves the actor to another host
256 * If the actor is currently blocked on an execution activity, the activity is also
257 * migrated to the new host. If it's blocked on another kind of activity, an error is
258 * raised as the mandated code is not written yet. Please report that bug if you need it.
260 * Asynchronous activities started by the actor are not migrated automatically, so you have
261 * to take care of this yourself (only you knows which ones should be migrated).
263 void migrate(Host * new_host);
265 /** Ask the actor to die.
267 * Any blocking activity will be canceled, and it will be rescheduled to free its memory.
268 * Being killed is not something that actors can defer or avoid.
270 * SimGrid still have sometimes issues when you kill actors that are currently communicating and such.
271 * Still. Please report any bug that you may encounter with a minimal working example.
275 static void kill(aid_t pid);
277 /** Retrieves the actor that have the given PID (or nullptr if not existing) */
278 static ActorPtr by_pid(aid_t pid);
280 /** Wait for the actor to finish.
282 * This blocks the calling actor until the actor on which we call join() is terminated
285 void join(double timeout);
288 /** Ask kindly to all actors to die. Only the issuer will survive. */
289 static void kill_all();
291 /** Returns the internal implementation of this actor */
292 kernel::actor::ActorImpl* get_impl();
294 /** Retrieve the property value (or nullptr if not set) */
295 std::unordered_map<std::string, std::string>*
296 get_properties(); // FIXME: do not export the map, but only the keys or something
297 const char* get_property(std::string key);
298 void set_property(std::string key, std::string value);
301 /** @deprecated See Actor::create() */
302 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr createActor(
303 const char* name, s4u::Host* host, std::function<void()> code)
305 return create(name, host, code);
307 /** @deprecated See Actor::create() */
308 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr createActor(
309 const char* name, s4u::Host* host, std::function<void(std::vector<std::string>*)> code,
310 std::vector<std::string>* args)
312 return create(name, host, code, args);
314 /** @deprecated See Actor::create() */
315 template <class F, class... Args, typename = typename std::result_of<F(Args...)>::type>
316 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr createActor(
317 const char* name, s4u::Host* host, F code, Args... args)
319 return create(name, host, code, std::move(args)...);
321 /** @deprecated See Actor::create() */
322 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr createActor(
323 const char* name, s4u::Host* host, const char* function, std::vector<std::string> args)
325 return create(name, host, function, args);
327 /** @deprecated See Actor::is_daemon() */
328 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::is_daemon()") bool isDaemon() const;
329 /** @deprecated See Actor::get_name() */
330 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_name()") const simgrid::xbt::string& getName() const
334 /** @deprecated See Actor::get_cname() */
335 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_cname()") const char* getCname() const { return get_cname(); }
336 /** @deprecated See Actor::get_host() */
337 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_host()") Host* getHost() { return get_host(); }
338 /** @deprecated See Actor::get_pid() */
339 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_pid()") aid_t getPid() { return get_pid(); }
340 /** @deprecated See Actor::get_ppid() */
341 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_ppid()") aid_t getPpid() { return get_ppid(); }
342 /** @deprecated See Actor::is_suspended() */
343 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::is_suspended()") int isSuspended() { return is_suspended(); }
344 /** @deprecated See Actor::set_auto_restart() */
345 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::set_auto_restart()") void setAutoRestart(bool a)
349 /** @deprecated Please use a std::function<void(int, void*)> for first parameter */
350 XBT_ATTRIB_DEPRECATED_v323("Please use a std::function<void(int, void*)> for first parameter.") void on_exit(
351 int_f_pvoid_pvoid_t fun, void* data);
352 /** @deprecated See Actor::on_exit() */
353 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::on_exit()") void onExit(int_f_pvoid_pvoid_t fun, void* data)
355 on_exit([fun](int a, void* b) { fun((void*)(intptr_t)a, b); }, data);
357 /** @deprecated See Actor::set_kill_time() */
358 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::set_kill_time()") void setKillTime(double time) { set_kill_time(time); }
359 /** @deprecated See Actor::get_kill_time() */
360 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_kill_time()") double getKillTime() { return get_kill_time(); }
361 /** @deprecated See Actor::by_pid() */
362 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::by_pid()") static ActorPtr byPid(aid_t pid) { return by_pid(pid); }
363 /** @deprecated See Actor::kill_all() */
364 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::kill_all()") static void killAll() { kill_all(); }
365 /** @deprecated See Actor::kill_all() */
366 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::kill_all() with no parameter") static void killAll(
367 int XBT_ATTRIB_UNUSED resetPid)
371 /** @deprecated See Actor::get_impl() */
372 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_impl()") kernel::actor::ActorImpl* getImpl() { return get_impl(); }
373 /** @deprecated See Actor::get_property() */
374 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_property()") const char* getProperty(const char* key)
376 return get_property(key);
378 /** @deprecated See Actor::get_properties() */
379 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_properties()") std::map<std::string, std::string>* getProperties()
381 std::map<std::string, std::string>* res = new std::map<std::string, std::string>();
382 std::unordered_map<std::string, std::string>* props = get_properties();
383 for (auto const& kv : *props)
387 /** @deprecated See Actor::get_properties() */
388 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_properties()") void setProperty(const char* key, const char* value)
390 set_property(key, value);
396 * @brief Static methods working on the current actor (see @ref s4u::Actor) */
397 namespace this_actor {
399 XBT_PUBLIC bool is_maestro();
401 /** Block the actor sleeping for that amount of seconds (may throws hostFailure) */
402 XBT_PUBLIC void sleep_for(double duration);
403 XBT_PUBLIC void sleep_until(double timeout);
405 template <class Rep, class Period> inline void sleep_for(std::chrono::duration<Rep, Period> duration)
407 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
408 this_actor::sleep_for(seconds.count());
411 template <class Duration> inline void sleep_until(const SimulationTimePoint<Duration>& timeout_time)
413 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
414 this_actor::sleep_until(timeout_native.time_since_epoch().count());
417 /** Block the actor, computing the given amount of flops */
418 XBT_PUBLIC void execute(double flop);
420 /** Block the actor, computing the given amount of flops at the given priority.
421 * An execution of priority 2 computes twice as fast as an execution at priority 1. */
422 XBT_PUBLIC void execute(double flop, double priority);
424 XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount);
425 XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount,
428 XBT_PUBLIC ExecPtr exec_init(double flops_amounts);
429 XBT_PUBLIC ExecPtr exec_async(double flops_amounts);
431 /** @brief Returns the actor ID of the current actor). */
432 XBT_PUBLIC aid_t get_pid();
434 /** @brief Returns the ancestor's actor ID of the current actor. */
435 XBT_PUBLIC aid_t get_ppid();
437 /** @brief Returns the name of the current actor. */
438 XBT_PUBLIC std::string get_name();
439 /** @brief Returns the name of the current actor as a C string. */
440 XBT_PUBLIC const char* get_cname();
442 /** @brief Returns the name of the host on which the actor is running. */
443 XBT_PUBLIC Host* get_host();
445 /** @brief Suspend the actor. */
446 XBT_PUBLIC void suspend();
448 /** @brief yield the actor. */
449 XBT_PUBLIC void yield();
451 /** @brief Resume the actor. */
452 XBT_PUBLIC void resume();
454 XBT_PUBLIC bool is_suspended();
456 /** @brief kill the actor. */
457 XBT_PUBLIC void exit();
460 /** @deprecated Please use std::function<void(int, void*)> for first parameter */
461 XBT_ATTRIB_DEPRECATED_v323("Please use std::function<void(int, void*)> for first parameter.") XBT_PUBLIC
462 void on_exit(int_f_pvoid_pvoid_t fun, void* data);
463 /** @brief Add a function to the list of "on_exit" functions. */
464 XBT_PUBLIC void on_exit(std::function<void(int, void*)> fun, void* data);
466 /** @brief Migrate the actor to a new host. */
467 XBT_PUBLIC void migrate(Host* new_host);
469 /** @deprecated See this_actor::get_name() */
470 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_name()") XBT_PUBLIC std::string getName();
471 /** @deprecated See this_actor::get_cname() */
472 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_cname()") XBT_PUBLIC const char* getCname();
473 /** @deprecated See this_actor::is_maestro() */
474 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::is_maestro()") XBT_PUBLIC bool isMaestro();
475 /** @deprecated See this_actor::get_pid() */
476 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_pid()") XBT_PUBLIC aid_t getPid();
477 /** @deprecated See this_actor::get_ppid() */
478 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_ppid()") XBT_PUBLIC aid_t getPpid();
479 /** @deprecated See this_actor::get_host() */
480 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_host()") XBT_PUBLIC Host* getHost();
481 /** @deprecated See this_actor::is_suspended() */
482 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::is_suspended()") XBT_PUBLIC bool isSuspended();
483 /** @deprecated See this_actor::on_exit() */
484 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::on_exit()") XBT_PUBLIC void onExit(int_f_pvoid_pvoid_t fun, void* data);
485 /** @deprecated See this_actor::exit() */
486 XBT_ATTRIB_DEPRECATED_v324("Please use this_actor::exit()") XBT_PUBLIC void kill();
492 }} // namespace simgrid::s4u
495 #endif /* SIMGRID_S4U_ACTOR_HPP */