X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1755089356224e9003a0a8dbfc1a2eca8b0f93e9..30e90945e7b6b0b08fb0b5ba0fc0dcc12f964a10:/include/simgrid/s4u/actor.hpp

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-/* Copyright (c) 2006-2016. 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. */
-
-#ifndef SIMGRID_S4U_ACTOR_HPP
-#define SIMGRID_S4U_ACTOR_HPP
-
-#include <atomic>
-#include <chrono>
-#include <functional>
-#include <memory>
-#include <stdexcept>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include <boost/intrusive_ptr.hpp>
-
-#include <xbt/base.h>
-#include <xbt/functional.hpp>
-
-#include <simgrid/chrono.hpp>
-#include <simgrid/simix.h>
-#include <simgrid/s4u/forward.hpp>
-
-namespace simgrid {
-namespace s4u {
-
-/** @ingroup s4u_api
- * 
- * An actor is an independent stream of execution in your distributed application.
- *
- * You can think of an actor as a process in your distributed application, or as a thread in a multithreaded program.
- * This is the only component in SimGrid that actually does something on its own, executing its own code. 
- * A resource will not get used if you don't schedule activities on them. This is the code of Actors that create and schedule these activities.
- * 
- * An actor is located on a (simulated) host, but it can interact
- * with the whole simulated platform.
- * 
- * The s4u::Actor API is strongly inspired from the C++11 threads.
- * The <a href="http://en.cppreference.com/w/cpp/thread">documentation 
- * of this standard</a> may help to understand the philosophy of the S4U
- * Actors. 
- * 
- * @section s4u_actor_def Defining the skeleton of an Actor
- * 
- * %As in the <a href="http://en.cppreference.com/w/cpp/thread">C++11
- * standard</a>, you can declare the code of your actor either as a
- * pure function or as an object. It is very simple with functions:
- * 
- * @code{.cpp}
- * #include "s4u/actor.hpp"
- * 
- * // Declare the code of your worker
- * void worker() {
- *   printf("Hello s4u");
- *   simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
- * };
- * 
- * // From your main or from another actor, create your actor on the host Jupiter
- * // The following line actually creates a new actor, even if there is no "new". 
- * Actor("Alice", simgrid::s4u::Host::by_name("Jupiter"), worker);
- * @endcode
- * 
- * But some people prefer to encapsulate their actors in classes and
- * objects to save the actor state in a cleanly dedicated location.
- * The syntax is slightly more complicated, but not much.
- * 
- * @code{.cpp}
- * #include "s4u/actor.hpp"
- * 
- * // Declare the class representing your actors
- * class Worker {
- * public:
- *   void operator()() { // Two pairs of () because this defines the method called ()
- *     printf("Hello s4u");
- *     simgrid::s4u::this_actor::execute(5*1024*1024); // Get the worker executing a task of 5 MFlops
- *   }
- * };
- * 
- * // From your main or from another actor, create your actor. Note the () after Worker
- * Actor("Bob", simgrid::s4u::Host::by_name("Jupiter"), Worker());
- * @endcode
- * 
- * @section s4u_actor_flesh Fleshing your actor
- * 
- * The body of your actor can use the functions of the
- * simgrid::s4u::this_actor namespace to interact with the world.
- * This namespace contains the methods to start new activities
- * (executions, communications, etc), and to get informations about
- * the currently running thread (its location, etc).
- * 
- * Please refer to the @link simgrid::s4u::this_actor full API @endlink.
- *
- * 
- * @section s4u_actor_deploy Using a deployment file
- * 
- * @warning This is currently not working with S4U. Sorry about that.
- * 
- * The best practice is to use an external deployment file as
- * follows, because it makes it easier to test your application in
- * differing settings. Load this file with
- * s4u::Engine::loadDeployment() before the simulation starts. 
- * Refer to the @ref deployment section for more information.
- * 
- * @code{.xml}
- * <?xml version='1.0'?>
- * <!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
- * <platform version="4">
- * 
- *   <!-- Start a process called 'master' on the host called 'Tremblay' -->
- *   <process host="Tremblay" function="master">
- *      <!-- Here come the parameter that you want to feed to this instance of master -->
- *      <argument value="20"/>        <!-- argv[1] -->
- *      <argument value="50000000"/>  <!-- argv[2] -->
- *      <argument value="1000000"/>   <!-- argv[3] -->
- *      <argument value="5"/>         <!-- argv[4] -->
- *   </process>
- * 
- *   <!-- Start a process called 'worker' on the host called 'Jupiter' -->
- *   <process host="Jupiter" function="worker"/> <!-- Don't provide any parameter ->>
- * 
- * </platform>
- * @endcode
- * 
- *  @{
- */
-
-/** @brief Simulation Agent (see \ref s4u_actor)*/
-XBT_PUBLIC_CLASS Actor {
-  friend Mailbox;
-  friend simgrid::simix::Process;
-  smx_process_t pimpl_ = nullptr;
-
-  /** Wrap a (possibly non-copyable) single-use task into a `std::function` */
-  template<class F, class... Args>
-  static std::function<void()> wrap_task(F f, Args... args)
-  {
-    typedef decltype(f(std::move(args)...)) R;
-    auto task = std::make_shared<simgrid::xbt::Task<R()>>(
-      simgrid::xbt::makeTask(std::move(f), std::move(args)...));
-    return [=] {
-      (*task)();
-    };
-  }
-
-  Actor(smx_process_t pimpl) : pimpl_(pimpl) {}
-
-public:
-
-  // ***** No copy *****
-
-  Actor(Actor const&) = delete;
-  Actor& operator=(Actor const&) = delete;
-
-  // ***** Reference count (delegated to pimpl_) *****
-
-  friend void intrusive_ptr_add_ref(Actor* actor)
-  {
-    xbt_assert(actor != nullptr);
-    SIMIX_process_ref(actor->pimpl_);
-  }
-  friend void intrusive_ptr_release(Actor* actor)
-  {
-    xbt_assert(actor != nullptr);
-    SIMIX_process_unref(actor->pimpl_);
-  }
-  using Ptr = boost::intrusive_ptr<Actor>;
-
-  // ***** Actor creation *****
-
-  /** Create an actor using a function
-   *
-   *  If the actor is restarted, the actor has a fresh copy of the function.
-   */
-  static Ptr createActor(const char* name, s4u::Host *host, double killTime, std::function<void()> code);
-
-  static Ptr createActor(const char* name, s4u::Host *host, std::function<void()> code)
-  {
-    return createActor(name, host, -1.0, std::move(code));
-  }
-
-  /** Create an actor using code
-   *
-   *  Using this constructor, move-only type can be used. The consequence is
-   *  that we cannot copy the value and restart the process in its initial
-   *  state. In order to use auto-restart, an explicit `function` must be passed
-   *  instead.
-   */
-  template<class F, class... Args,
-    // This constructor is enabled only if the call code(args...) is valid:
-    typename = typename std::result_of<F(Args...)>::type
-    >
-  static Ptr createActor(const char* name, s4u::Host *host, F code, Args... args)
-  {
-    return createActor(name, host, wrap_task(std::move(code), std::move(args)...));
-  }
-
-  // Create actor from function name:
-
-  static Ptr createActor(const char* name, s4u::Host *host, double killTime,
-    const char* function, std::vector<std::string> args);
-
-  static Ptr createActor(const char* name, s4u::Host *host, const char* function,
-      std::vector<std::string> args)
-  {
-    return createActor(name, host, -1.0, function, std::move(args));
-  }
-
-  // ***** Methods *****
-
-  /** Retrieves the actor that have the given PID (or NULL if not existing) */
-  //static Actor *byPid(int pid); not implemented
-
-  /** Retrieves the name of that actor */
-  const char* getName();
-  /** Retrieves the host on which that actor is running */
-  s4u::Host *getHost();
-  /** Retrieves the PID of that actor */
-  int getPid();
-
-  /** If set to true, the actor will automatically restart when its host reboots */
-  void setAutoRestart(bool autorestart);
-  /** Sets the time at which that actor should be killed */
-  void setKillTime(double time);
-  /** Retrieves the time at which that actor will be killed (or -1 if not set) */
-  double getKillTime();
-
-  /** Ask the actor to die.
-   *
-   * It will only notice your request when doing a simcall next time (a communication or similar).
-   * SimGrid sometimes have issues when you kill actors that are currently communicating and such. We are working on it to fix the issues.
-   */
-  void kill();
-
-  static void kill(int pid);
-  static Ptr forPid(int pid);
-  
-  /**
-   * Wait for the actor to finish.
-   */ 
-  void join();
-  
-  // Static methods on all actors:
-
-  /** Ask kindly to all actors to die. Only the issuer will survive. */
-  static void killAll();
-
-protected:
-  /** Returns the internal implementation of this actor */
-  smx_process_t getImpl();
-};
-
-using ActorPtr = Actor::Ptr;
-
-/** @ingroup s4u_api
- *  @brief Static methods working on the current actor (see @ref s4u::Actor) */
-namespace this_actor {
-
-  /** Block the actor sleeping for that amount of seconds (may throws hostFailure) */
-  XBT_PUBLIC(void) sleep_for(double duration);
-  XBT_PUBLIC(void) sleep_until(double timeout);
-
-  template<class Rep, class Period>
-  inline void sleep_for(std::chrono::duration<Rep, Period> duration)
-  {
-    auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
-    this_actor::sleep_for(seconds.count());
-  }
-  template<class Duration>
-  inline void sleep_until(const SimulationTimePoint<Duration>& timeout_time)
-  {
-    auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
-    this_actor::sleep_until(timeout_native.time_since_epoch().count());
-  }
-
-  XBT_ATTRIB_DEPRECATED("Use sleep_for()")
-  inline void sleep(double duration)
-  {
-    return sleep_for(duration);
-  }
-
-  /** Block the actor, computing the given amount of flops */
-  XBT_PUBLIC(e_smx_state_t) execute(double flop);
-
-  /** Block the actor until it gets a message from the given mailbox.
-   *
-   * See \ref Comm for the full communication API (including non blocking communications).
-   */
-  XBT_PUBLIC(void*) recv(Mailbox &chan);
-
-  /** Block the actor until it delivers a message of the given simulated size to the given mailbox
-   *
-   * See \ref Comm for the full communication API (including non blocking communications).
-  */
-  XBT_PUBLIC(void) send(Mailbox &chan, void*payload, size_t simulatedSize);
-  
-  /**
-   * Return the PID of the current actor.
-   */
-  XBT_PUBLIC(int) getPid();
-
-};
-
-/** @} */
-
-}} // namespace simgrid::s4u
-
-
-#endif /* SIMGRID_S4U_ACTOR_HPP */