#ifndef SIMGRID_S4U_ACTIVITY_HPP
#define SIMGRID_S4U_ACTIVITY_HPP
-#include "xbt/asserts.h"
+#include <xbt/asserts.h>
+#include <algorithm>
#include <atomic>
#include <set>
#include <simgrid/forward.h>
+#include <stdexcept>
#include <string>
#include <vector>
#include <xbt/signal.hpp>
+#include <xbt/utility.hpp>
XBT_LOG_EXTERNAL_CATEGORY(s4u_activity);
friend Exec;
friend Io;
+public:
+ // enum class State { ... }
+ XBT_DECLARE_ENUM_CLASS(State, INITED, STARTING, STARTED, FAILED, CANCELED, FINISHED);
+
+ virtual bool is_assigned() const = 0;
+ virtual bool dependencies_solved() const { return dependencies_.empty(); }
+
protected:
Activity() = default;
virtual ~Activity() = default;
ActivityPtr b = successors_.back();
XBT_CVERB(s4u_activity, "Remove a dependency from '%s' on '%s'", get_cname(), b->get_cname());
b->dependencies_.erase(this);
- if (b->dependencies_.empty()) {
+ if (b->dependencies_solved()) {
b->vetoable_start();
}
successors_.pop_back();
void add_successor(ActivityPtr a)
{
+ if(this == a)
+ throw std::invalid_argument("Cannot be its own successor");
+ auto p = std::find_if(successors_.begin(), successors_.end(), [a](ActivityPtr const& i){ return i.get() == a.get(); });
+ if (p != successors_.end())
+ throw std::invalid_argument("Dependency already exists");
+
successors_.push_back(a);
a->dependencies_.insert({this});
}
+ void remove_successor(ActivityPtr a)
+ {
+ if(this == a)
+ throw std::invalid_argument("Cannot ask to remove itself from successors list");
+
+ auto p = std::find_if(successors_.begin(), successors_.end(), [a](ActivityPtr const& i){ return i.get() == a.get(); });
+ if (p != successors_.end()){
+ successors_.erase(p);
+ a->dependencies_.erase({this});
+ } else
+ throw std::invalid_argument("Dependency does not exist. Can not be removed.");
+ }
+
+ static std::set<Activity*>* vetoed_activities_;
+
public:
+ /*! Signal fired each time that the activity fails to start because of a veto (e.g., unsolved dependency or no
+ * resource assigned) */
+ static xbt::signal<void(Activity&)> on_veto;
+ /*! Signal fired when theactivity completes (either normally, cancelled or failed) */
+ static xbt::signal<void(Activity&)> on_completion;
+
void vetoable_start()
{
state_ = State::STARTING;
- if (dependencies_.empty()) {
- XBT_CVERB(s4u_activity, "All dependencies are solved, let's start '%s'", get_cname());
+ if (dependencies_solved() && is_assigned()) {
+ XBT_CVERB(s4u_activity, "'%s' is assigned to a resource and all dependencies are solved. Let's start", get_cname());
start();
+ } else {
+ if (vetoed_activities_ != nullptr)
+ vetoed_activities_->insert(this);
+ on_veto(*this);
}
}
+ void complete(Activity::State state)
+ {
+ state_ = state;
+ if (state == State::FINISHED)
+ release_dependencies();
+ on_completion(*this);
+ }
+
+ static std::set<Activity*>* get_vetoed_activities() { return vetoed_activities_; }
+ static void set_vetoed_activities(std::set<Activity*>* whereto) { vetoed_activities_ = whereto; }
+
#ifndef DOXYGEN
Activity(Activity const&) = delete;
Activity& operator=(Activity const&) = delete;
#endif
- enum class State { INITED = 0, STARTING, STARTED, CANCELED, FINISHED };
-
/** Starts a previously created activity.
*
* This function is optional: you can call wait() even if you didn't call start()
*/
virtual Activity* start() = 0;
/** Blocks the current actor until the activity is terminated */
- virtual Activity* wait() = 0;
+ Activity* wait() { return wait_for(-1.0); }
/** Blocks the current actor until the activity is terminated, or until the timeout is elapsed\n
* Raises: timeout exception.*/
- virtual Activity* wait_for(double timeout) = 0;
+ Activity* wait_for(double timeout);
/** Blocks the current actor until the activity is terminated, or until the time limit is reached\n
* Raises: timeout exception. */
void wait_until(double time_limit);
/** Cancel that activity */
- virtual Activity* cancel() = 0;
+ Activity* cancel();
/** Retrieve the current state of the activity */
Activity::State get_state() const { return state_; }
+ /** Return a string representation of the activity's state (one of INITED, STARTING, STARTED, CANCELED, FINISHED) */
+ const char* get_state_str() const;
void set_state(Activity::State state) { state_ = state; }
/** Tests whether the given activity is terminated yet. */
virtual bool test();
Activity::add_successor(a);
return static_cast<AnyActivity*>(this);
}
-
+ AnyActivity* remove_successor(ActivityPtr a)
+ {
+ Activity::remove_successor(a);
+ 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");
}
void* get_user_data() const { return user_data_; }
+
+ AnyActivity* vetoable_start()
+ {
+ Activity::vetoable_start();
+ return static_cast<AnyActivity*>(this);
+ }
+
+ AnyActivity* cancel() { return static_cast<AnyActivity*>(Activity::cancel()); }
+ AnyActivity* wait() { return wait_for(-1.0); }
+ virtual AnyActivity* wait_for(double timeout) { return static_cast<AnyActivity*>(Activity::wait_for(timeout)); }
+
#ifndef DOXYGEN
/* The refcounting is done in the ancestor class, Activity, but we want each of the classes benefiting of the CRTP
* (Exec, Comm, etc) to have smart pointers too, so we define these methods here, that forward the ptr_release and
