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 <simgrid/chrono.hpp>
11 #include <xbt/Extendable.hpp>
12 #include <xbt/functional.hpp>
13 #include <xbt/signal.hpp>
14 #include <xbt/string.hpp>
21 * An actor is an independent stream of execution in your distributed application.
23 * You can think of an actor as a process in your distributed application, or as a thread in a multithreaded program.
24 * This is the only component in SimGrid that actually does something on its own, executing its own code.
25 * A resource will not get used if you don't schedule activities on them. This is the code of Actors that create and
26 * schedule these activities.
28 * An actor is located on a (simulated) host, but it can interact
29 * with the whole simulated platform.
31 * The s4u::Actor API is strongly inspired from the C++11 threads.
32 * The <a href="http://en.cppreference.com/w/cpp/thread">documentation
33 * of this standard</a> may help to understand the philosophy of the S4U
36 * @section s4u_actor_def Defining the skeleton of an Actor
38 * As in the <a href="http://en.cppreference.com/w/cpp/thread">C++11
39 * standard</a>, you can declare the code of your actor either as a
40 * pure function or as an object. It is very simple with functions:
43 * #include <simgrid/s4u/actor.hpp>
45 * // Declare the code of your worker
47 * printf("Hello s4u");
48 * simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
51 * // From your main or from another actor, create your actor on the host Jupiter
52 * // The following line actually creates a new actor, even if there is no "new".
53 * Actor("Alice", simgrid::s4u::Host::by_name("Jupiter"), worker);
56 * But some people prefer to encapsulate their actors in classes and
57 * objects to save the actor state in a cleanly dedicated location.
58 * The syntax is slightly more complicated, but not much.
61 * #include <simgrid/s4u/actor.hpp>
63 * // Declare the class representing your actors
66 * void operator()() { // Two pairs of () because this defines the method called ()
67 * printf("Hello s4u");
68 * simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
72 * // From your main or from another actor, create your actor. Note the () after Worker
73 * Actor("Bob", simgrid::s4u::Host::by_name("Jupiter"), Worker());
76 * @section s4u_actor_flesh Fleshing your actor
78 * The body of your actor can use the functions of the
79 * simgrid::s4u::this_actor namespace to interact with the world.
80 * This namespace contains the methods to start new activities
81 * (executions, communications, etc), and to get informations about
82 * the currently running thread (its location, etc).
84 * Please refer to the @link simgrid::s4u::this_actor full API @endlink.
87 * @section s4u_actor_deploy Using a deployment file
89 * @warning This is currently not working with S4U. Sorry about that.
91 * The best practice is to use an external deployment file as
92 * follows, because it makes it easier to test your application in
93 * differing settings. Load this file with
94 * s4u::Engine::loadDeployment() before the simulation starts.
95 * Refer to the @ref deployment section for more information.
98 * <?xml version='1.0'?>
99 * <!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
100 * <platform version="4">
102 * <!-- Start an actor called 'master' on the host called 'Tremblay' -->
103 * <actor host="Tremblay" function="master">
104 * <!-- Here come the parameter that you want to feed to this instance of master -->
105 * <argument value="20"/> <!-- argv[1] -->
106 * <argument value="50000000"/> <!-- argv[2] -->
107 * <argument value="1000000"/> <!-- argv[3] -->
108 * <argument value="5"/> <!-- argv[4] -->
111 * <!-- Start an actor called 'worker' on the host called 'Jupiter' -->
112 * <actor host="Jupiter" function="worker"/> <!-- Don't provide any parameter ->>
120 /** @brief Simulation Agent */
121 class XBT_PUBLIC Actor : public simgrid::xbt::Extendable<Actor> {
124 friend simgrid::kernel::actor::ActorImpl;
125 friend simgrid::kernel::activity::MailboxImpl;
126 kernel::actor::ActorImpl* pimpl_ = nullptr;
128 /** Wrap a (possibly non-copyable) single-use task into a `std::function` */
129 template<class F, class... Args>
130 static std::function<void()> wrap_task(F f, Args... args)
132 typedef decltype(f(std::move(args)...)) R;
133 auto task = std::make_shared<simgrid::xbt::Task<R()>>(
134 simgrid::xbt::makeTask(std::move(f), std::move(args)...));
135 return [task] { (*task)(); };
138 explicit Actor(smx_actor_t pimpl) : pimpl_(pimpl) {}
142 // ***** No copy *****
143 Actor(Actor const&) = delete;
144 Actor& operator=(Actor const&) = delete;
146 // ***** Reference count *****
147 friend XBT_PUBLIC void intrusive_ptr_add_ref(Actor * actor);
148 friend XBT_PUBLIC void intrusive_ptr_release(Actor * actor);
150 // ***** Actor creation *****
151 /** Retrieve a reference to myself */
152 static ActorPtr self();
154 /** Signal to others that a new actor has been created **/
155 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_creation;
156 /** Signal to others that an actor has been suspended**/
157 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_suspend;
158 /** Signal to others that an actor has been resumed **/
159 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_resume;
160 /** Signal to others that an actor is sleeping **/
161 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_sleep;
162 /** Signal to others that an actor wakes up for a sleep **/
163 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_wake_up;
164 /** Signal to others that an actor is going to migrated to another host**/
165 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_migration_start;
166 /** Signal to others that an actor is has been migrated to another host **/
167 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_migration_end;
168 /** Signal indicating that the given actor is about to disappear */
169 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_destruction;
171 /** Create an actor using a function
173 * If the actor is restarted, the actor has a fresh copy of the function.
175 static ActorPtr create(const char* name, s4u::Host* host, std::function<void()> code);
177 static ActorPtr create(const char* name, s4u::Host* host, std::function<void(std::vector<std::string>*)> code,
178 std::vector<std::string>* args)
180 return create(name, host, [code](std::vector<std::string>* args) { code(args); }, args);
183 /** Create an actor using code
185 * Using this constructor, move-only type can be used. The consequence is
186 * that we cannot copy the value and restart the actor in its initial
187 * state. In order to use auto-restart, an explicit `function` must be passed
190 template <class F, class... Args,
191 // This constructor is enabled only if the call code(args...) is valid:
192 typename = typename std::result_of<F(Args...)>::type>
193 static ActorPtr create(const char* name, s4u::Host* host, F code, Args... args)
195 return create(name, host, wrap_task(std::move(code), std::move(args)...));
198 // Create actor from function name:
199 static ActorPtr create(const char* name, s4u::Host* host, const char* function, std::vector<std::string> args);
201 // ***** Methods *****
202 /** This actor will be automatically terminated when the last non-daemon actor finishes **/
205 /** Returns whether or not this actor has been daemonized or not **/
206 bool is_daemon() const;
208 /** Retrieves the name of that actor as a C++ string */
209 const simgrid::xbt::string& get_name() const;
210 /** Retrieves the name of that actor as a C string */
211 const char* get_cname() const;
212 /** Retrieves the host on which that actor is running */
213 s4u::Host* get_host();
214 /** Retrieves the PID of that actor
216 * aid_t is an alias for long */
217 aid_t get_pid() const;
218 /** Retrieves the PPID of that actor
220 * aid_t is an alias for long */
221 aid_t get_ppid() const;
223 /** Suspend an actor by suspending the task on which it was waiting for the completion. */
226 /** Resume a suspended actor by resuming the task on which it was waiting for the completion. */
231 /** Returns true if the actor is suspended. */
234 /** If set to true, the actor will automatically restart when its host reboots */
235 void set_auto_restart(bool autorestart);
237 /** Add a function to the list of "on_exit" functions for the current actor. The on_exit functions are the functions
238 * executed when your actor is killed. You should use them to free the data used by your actor.
240 void on_exit(std::function<void(int, void*)> fun, void* data);
242 /** Sets the time at which that actor should be killed */
243 void set_kill_time(double time);
244 /** Retrieves the time at which that actor will be killed (or -1 if not set) */
245 double get_kill_time();
247 void migrate(Host * new_host);
249 /** Ask the actor to die.
251 * Any blocking activity will be canceled, and it will be rescheduled to free its memory.
252 * Being killed is not something that actors can defer or avoid.
254 * SimGrid still have sometimes issues when you kill actors that are currently communicating and such.
255 * Still. Please report any bug that you may encounter with a minimal working example.
259 static void kill(aid_t pid);
261 /** Retrieves the actor that have the given PID (or nullptr if not existing) */
262 static ActorPtr by_pid(aid_t pid);
264 /** @brief Wait for the actor to finish.
266 * This blocks the calling actor until the actor on which we call join() is terminated
269 void join(double timeout);
272 /** Ask kindly to all actors to die. Only the issuer will survive. */
273 static void kill_all();
275 /** Returns the internal implementation of this actor */
276 kernel::actor::ActorImpl* get_impl();
278 /** Retrieve the property value (or nullptr if not set) */
279 std::map<std::string, std::string>* get_properties(); // FIXME: do not export the map, but only the keys or something
280 const char* get_property(const char* key);
281 void set_property(const char* key, const char* value);
283 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr
284 createActor(const char* name, s4u::Host* host, std::function<void()> code)
286 return create(name, host, code);
288 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr
289 createActor(const char* name, s4u::Host* host, std::function<void(std::vector<std::string>*)> code,
290 std::vector<std::string>* args)
292 return create(name, host, code, args);
294 template <class F, class... Args, typename = typename std::result_of<F(Args...)>::type>
295 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr
296 createActor(const char* name, s4u::Host* host, F code, Args... args)
298 return create(name, host, code, std::move(args)...);
300 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::create()") static ActorPtr
301 createActor(const char* name, s4u::Host* host, const char* function, std::vector<std::string> args)
303 return create(name, host, function, args);
305 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::is_daemon()") bool isDaemon() const;
306 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_name()") const simgrid::xbt::string& getName() const
310 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_cname()") const char* getCname() const { return get_cname(); }
311 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_host()") Host* getHost() { return get_host(); }
312 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_pid()") aid_t getPid() { return get_pid(); }
313 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_ppid()") aid_t getPpid() { return get_ppid(); }
314 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::is_suspended()") int isSuspended() { return is_suspended(); }
315 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::set_auto_restart()") void setAutoRestart(bool a)
319 XBT_ATTRIB_DEPRECATED_v323("Please use a std::function<void(int, void*)> for first parameter.") void on_exit(
320 int_f_pvoid_pvoid_t fun, void* data);
321 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::on_exit()") void onExit(int_f_pvoid_pvoid_t fun, void* data)
323 on_exit([fun](int a, void* b) { fun((void*)(intptr_t)a, b); }, data);
325 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::set_kill_time()") void setKillTime(double time) { set_kill_time(time); }
326 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_kill_time()") double getKillTime() { return get_kill_time(); }
327 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::by_pid()") static ActorPtr byPid(aid_t pid) { return by_pid(pid); }
328 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::kill_all()") static void killAll() { kill_all(); }
329 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::kill_all() with no parameter") static void killAll(int resetPid)
333 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_impl()") kernel::actor::ActorImpl* getImpl() { return get_impl(); }
334 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_property()") const char* getProperty(const char* key)
336 return get_property(key);
338 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_properties()") std::map<std::string, std::string>* getProperties()
340 return get_properties();
342 XBT_ATTRIB_DEPRECATED_v323("Please use Actor::get_properties()") void setProperty(const char* key, const char* value)
344 set_property(key, value);
349 * @brief Static methods working on the current actor (see @ref s4u::Actor) */
350 namespace this_actor {
352 XBT_PUBLIC bool is_maestro();
354 /** Block the actor sleeping for that amount of seconds (may throws hostFailure) */
355 XBT_PUBLIC void sleep_for(double duration);
356 XBT_PUBLIC void sleep_until(double timeout);
358 template <class Rep, class Period> inline void sleep_for(std::chrono::duration<Rep, Period> duration)
360 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
361 this_actor::sleep_for(seconds.count());
364 template <class Duration> inline void sleep_until(const SimulationTimePoint<Duration>& timeout_time)
366 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
367 this_actor::sleep_until(timeout_native.time_since_epoch().count());
370 /** Block the actor, computing the given amount of flops */
371 XBT_PUBLIC void execute(double flop);
373 /** Block the actor, computing the given amount of flops at the given priority.
374 * An execution of priority 2 computes twice as fast as an execution at priority 1. */
375 XBT_PUBLIC void execute(double flop, double priority);
377 XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount);
378 XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount,
381 XBT_PUBLIC ExecPtr exec_init(double flops_amounts);
382 XBT_PUBLIC ExecPtr exec_async(double flops_amounts);
384 /** @brief Returns the actor ID of the current actor). */
385 XBT_PUBLIC aid_t get_pid();
387 /** @brief Returns the ancestor's actor ID of the current actor. */
388 XBT_PUBLIC aid_t get_ppid();
390 /** @brief Returns the name of the current actor. */
391 XBT_PUBLIC std::string get_name();
392 /** @brief Returns the name of the current actor as a C string. */
393 XBT_PUBLIC const char* get_cname();
395 /** @brief Returns the name of the host on which the actor is running. */
396 XBT_PUBLIC Host* get_host();
398 /** @brief Suspend the actor. */
399 XBT_PUBLIC void suspend();
401 /** @brief yield the actor. */
402 XBT_PUBLIC void yield();
404 /** @brief Resume the actor. */
405 XBT_PUBLIC void resume();
407 XBT_PUBLIC bool is_suspended();
409 /** @brief kill the actor. */
410 XBT_PUBLIC void kill();
412 /** @brief Add a function to the list of "on_exit" functions. */
413 XBT_ATTRIB_DEPRECATED_v323("Please use std::function<void(int, void*)> for first parameter.") XBT_PUBLIC
414 void on_exit(int_f_pvoid_pvoid_t fun, void* data);
415 XBT_PUBLIC void on_exit(std::function<void(int, void*)> fun, void* data);
417 /** @brief Migrate the actor to a new host. */
418 XBT_PUBLIC void migrate(Host* new_host);
420 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_name()") XBT_PUBLIC std::string getName();
421 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_cname()") XBT_PUBLIC const char* getCname();
422 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::is_maestro()") XBT_PUBLIC bool isMaestro();
423 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_pid()") XBT_PUBLIC aid_t getPid();
424 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_ppid()") XBT_PUBLIC aid_t getPpid();
425 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::get_host()") XBT_PUBLIC Host* getHost();
426 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::is_suspended()") XBT_PUBLIC bool isSuspended();
427 XBT_ATTRIB_DEPRECATED_v323("Please use this_actor::on_exit()") XBT_PUBLIC
428 void onExit(int_f_pvoid_pvoid_t fun, void* data);
433 }} // namespace simgrid::s4u
436 #endif /* SIMGRID_S4U_ACTOR_HPP */