/* 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 <xbt/sysdep.h>
-#include <mutex>
+#include <mutex> /* std::mutex and std::lock_guard */
+#include "simgrid/s4u.hpp" /* All of S4U */
-#include "simgrid/s4u.h"
-
-#define NB_ACTOR 2
+#define NB_ACTOR 6
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "a sample log category");
-// simgrid::s4u::Mutex mtx; //FIXME generate error -> You must run MSG_init before using MSG
-
-//Create an actor as a c++ functor
-class Worker {
- simgrid::s4u::Mutex mutex_;
- int *results_;
-public:
- Worker(int *res, simgrid::s4u::Mutex mutex) :
- mutex_(std::move(mutex)), results_(res) {};
- // Define the code of the actor
- void operator()() {
- // Do the calculation
- simgrid::s4u::this_actor::execute(1000);
-
- // lock the mutex before enter in the critical section
- std::lock_guard<simgrid::s4u::Mutex> lock(mutex_);
- XBT_INFO("Hello s4u, I'm ready to compute");
-
- // And finaly add it to the results
- *results_ += 1;
- XBT_INFO("I'm done, good bye");
- }
-};
-
-// This class is an example of how to use lock_guard with simgrid mutex
-class WorkerLockGuard {
- simgrid::s4u::Mutex mutex_;
- int *results_;
-public:
- WorkerLockGuard(int *res, simgrid::s4u::Mutex mutex) :
- mutex_(std::move(mutex)), results_(res) {};
- void operator()() {
+/* This worker uses a classical mutex */
+static void worker(simgrid::s4u::MutexPtr mutex, int& result)
+{
+ // lock the mutex before enter in the critical section
+ mutex->lock();
- simgrid::s4u::this_actor::execute(1000);
+ XBT_INFO("Hello s4u, I'm ready to compute after a regular lock");
+ // And finaly add it to the results
+ result += 1;
+ XBT_INFO("I'm done, good bye");
- // Simply use the std::lock_guard like this
- std::lock_guard<simgrid::s4u::Mutex> lock(mutex_);
+ // You have to unlock the mutex if you locked it manually.
+ // Beware of exceptions preventing your unlock() from being executed!
+ mutex->unlock();
+}
- // then you are in a safe zone
- XBT_INFO("Hello s4u, I'm ready to compute");
- // update the results
- *results_ += 1;
- XBT_INFO("I'm done, good bye");
- }
-};
+static void workerLockGuard(simgrid::s4u::MutexPtr mutex, int& result)
+{
+ // Simply use the std::lock_guard like this
+ // It's like a lock() that would do the unlock() automatically when getting out of scope
+ std::lock_guard<simgrid::s4u::Mutex> lock(*mutex);
-class MainActor {
-public:
- void operator()() {
- int res = 0;
- simgrid::s4u::Mutex mutex;
- simgrid::s4u::Actor workers[NB_ACTOR*2];
+ // then you are in a safe zone
+ XBT_INFO("Hello s4u, I'm ready to compute after a lock_guard");
+ // update the results
+ result += 1;
+ XBT_INFO("I'm done, good bye");
- for (int i = 0; i < NB_ACTOR * 2 ; i++) {
- // To create a worker use the static method simgrid::s4u::Actor.
- if((i % 2) == 0 )
- workers[i] = simgrid::s4u::Actor("worker",
- simgrid::s4u::Host::by_name("Jupiter"),
- WorkerLockGuard(&res, mutex));
- else
- workers[i] = simgrid::s4u::Actor("worker",
- simgrid::s4u::Host::by_name("Tremblay"),
- Worker(&res, mutex));
- }
+ // Nothing specific here: the unlock will be automatic
+}
- simgrid::s4u::this_actor::sleep(10);
- XBT_INFO("Results is -> %d", res);
+static void master()
+{
+ int result = 0;
+ simgrid::s4u::MutexPtr mutex = simgrid::s4u::Mutex::createMutex();
+
+ for (int i = 0; i < NB_ACTOR * 2 ; i++) {
+ // To create a worker use the static method simgrid::s4u::Actor.
+ if((i % 2) == 0 )
+ simgrid::s4u::Actor::createActor("worker", simgrid::s4u::Host::by_name("Jupiter"), workerLockGuard, mutex, std::ref(result));
+ else
+ simgrid::s4u::Actor::createActor("worker", simgrid::s4u::Host::by_name("Tremblay"), worker, mutex, std::ref(result));
}
-};
+ simgrid::s4u::this_actor::sleep_for(10);
+ XBT_INFO("Results is -> %d", result);
+}
-int main(int argc, char **argv) {
+int main(int argc, char **argv)
+{
simgrid::s4u::Engine *e = new simgrid::s4u::Engine(&argc,argv);
e->loadPlatform("../../platforms/two_hosts.xml");
- simgrid::s4u::Actor("main", simgrid::s4u::Host::by_name("Tremblay"), 0, MainActor());
+ simgrid::s4u::Actor::createActor("main", simgrid::s4u::Host::by_name("Tremblay"), master);
e->run();
return 0;
}
