--- /dev/null
+/* Copyright (c) 2007-2019. 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 "simgrid/s4u.hpp"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
+
+simgrid::s4u::ExecPtr second;
+
+static void worker()
+{
+ double computation_amount = simgrid::s4u::this_actor::get_host()->get_speed();
+
+ simgrid::s4u::ExecPtr first = simgrid::s4u::this_actor::exec_init(computation_amount);
+ second = simgrid::s4u::this_actor::exec_init(computation_amount);
+
+ first->add_successor(second.get());
+ first->start();
+ first->wait();
+}
+
+static void vetoed_worker()
+{
+ second->vetoable_start();
+ XBT_INFO("%d %d", (int)second->get_state(), second->has_dependencies());
+ second->wait();
+}
+
+int main(int argc, char* argv[])
+{
+ simgrid::s4u::Engine e(&argc, argv);
+ e.load_platform(argv[1]);
+
+ simgrid::s4u::Actor::create("worker", simgrid::s4u::Host::by_name("Fafard"), worker);
+ simgrid::s4u::Actor::create("vetoed_worker", simgrid::s4u::Host::by_name("Fafard"), vetoed_worker);
+
+ e.run();
+
+ XBT_INFO("Simulation time %g", e.get_clock());
+
+ return 0;
+}
#define SIMGRID_S4U_ACTIVITY_HPP
#include "xbt/asserts.h"
+#include "xbt/log.h"
#include <atomic>
+#include <set>
#include <simgrid/forward.h>
#include <string>
+#include <vector>
#include <xbt/signal.hpp>
namespace simgrid {
protected:
Activity() = default;
virtual ~Activity() = default;
-
public:
#ifndef DOXYGEN
Activity(Activity const&) = delete;
Activity& operator=(Activity const&) = delete;
#endif
- enum class State { INITED = 0, STARTED, CANCELED, ERRORED, FINISHED };
+ enum class State { INITED = 0, STARTING, STARTED, CANCELED, ERRORED, FINISHED };
/** Starts a previously created activity.
*
*/
virtual Activity* start() = 0;
/** Blocks until the activity is terminated */
- virtual Activity* wait() = 0;
+ // virtual Activity* wait() = 0;
/** Blocks until the activity is terminated, or until the timeout is elapsed
* Raises: timeout exception.*/
virtual Activity* wait_for(double timeout) = 0;
virtual Activity* cancel() = 0;
/** Retrieve the current state of the activity */
Activity::State get_state() { return state_; }
+ void set_state(Activity::State state) { state_ = state; }
/** Tests whether the given activity is terminated yet. This is a pure function. */
virtual bool test() = 0;
double remains_ = 0;
};
+// template <class AnyActivity> class DependencyGuard {
+// public:
+// static bool activity_start_vetoer(AnyActivity* a) { return not a->has_dependencies(); }
+// static void on_activity_done(AnyActivity* a);
+//// {
+//// while (a->has_successors()) {
+//// AnyActivity* b = a->get_successor();
+//// b->remove_dependency_on(a);
+//// if (not b->has_dependencies()) {
+//// XBT_INFO("Activity is done and a successor can start");
+//// b->vetoable_start();
+//// }
+//// a->remove_successor();
+//// }
+//// }
+//};
+
template <class AnyActivity> class Activity_T : public Activity {
private:
std::string name_ = "";
std::string tracing_category_ = "";
void* user_data_ = nullptr;
std::atomic_int_fast32_t refcount_{0};
+ std::vector<AnyActivity*> successors_;
+ std::set<AnyActivity*> dependencies_;
public:
#ifndef DOXYGEN
}
friend void intrusive_ptr_add_ref(AnyActivity* a) { a->refcount_.fetch_add(1, std::memory_order_relaxed); }
#endif
+
+ void add_successor(AnyActivity* a)
+ {
+ // XBT_INFO("Adding %s as a successor of %s", get_name(), a->get_name());
+ successors_.push_back(a);
+ a->add_dependency_on(static_cast<AnyActivity*>(this));
+ }
+ void remove_successor() { successors_.pop_back(); }
+ AnyActivity* get_successor() { return successors_.back(); }
+ bool has_successors() { return not successors_.empty(); }
+
+ void add_dependency_on(AnyActivity* a) { dependencies_.insert({a}); }
+ void remove_dependency_on(AnyActivity* a) { dependencies_.erase(a); }
+ bool has_dependencies() { return not dependencies_.empty(); }
+ void on_activity_done()
+ {
+ while (has_successors()) {
+ AnyActivity* b = get_successor();
+ b->remove_dependency_on(static_cast<AnyActivity*>(this));
+ if (not b->has_dependencies()) {
+ // XBT_INFO("Activity is done and a successor can start");
+ b->vetoable_start();
+ }
+ remove_successor();
+ }
+ }
+
+ AnyActivity* vetoable_start()
+ {
+ set_state(State::STARTING);
+ if (has_dependencies())
+ return static_cast<AnyActivity*>(this);
+ // XBT_INFO("No veto, Activity can start");
+ set_state(State::STARTED);
+ static_cast<AnyActivity*>(this)->start();
+ return static_cast<AnyActivity*>(this);
+ }
+
+ virtual AnyActivity* wait()
+ {
+ static_cast<AnyActivity*>(this)->wait();
+ on_activity_done();
+ return static_cast<AnyActivity*>(this);
+ }
+
AnyActivity* set_name(const std::string& name)
{
xbt_assert(get_state() == State::INITED, "Cannot change the name of an activity after its start");
