X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/343da621d4fc46b8d15c839a5e21bb45fce68e27..e709643ef0c5b61c6c878016c418bffa2b1b20cd:/include/simgrid/s4u/Activity.hpp

diff --git a/include/simgrid/s4u/Activity.hpp b/include/simgrid/s4u/Activity.hpp
index 33753de9b6..fbf8993242 100644
--- a/include/simgrid/s4u/Activity.hpp
+++ b/include/simgrid/s4u/Activity.hpp
@@ -27,8 +27,6 @@ namespace s4u {
 class XBT_PUBLIC Activity {
   friend Comm;
   friend Exec;
-  friend ExecSeq;
-  friend ExecPar;
   friend Io;
 
 protected:
@@ -39,7 +37,7 @@ protected:
   {
     while (not successors_.empty()) {
       ActivityPtr b = successors_.back();
-      XBT_CDEBUG(s4u_activity, "Remove a dependency from '%s' on '%s'", get_cname(), b->get_cname());
+      XBT_CVERB(s4u_activity, "Remove a dependency from '%s' on '%s'", get_cname(), b->get_cname());
       b->dependencies_.erase(this);
       if (b->dependencies_.empty()) {
         b->vetoable_start();
@@ -59,7 +57,7 @@ public:
   {
     state_ = State::STARTING;
     if (dependencies_.empty()) {
-      XBT_CDEBUG(s4u_activity, "All dependencies are solved, let's start '%s'", get_cname());
+      XBT_CVERB(s4u_activity, "All dependencies are solved, let's start '%s'", get_cname());
       start();
     }
   }
@@ -69,34 +67,42 @@ public:
   Activity& operator=(Activity const&) = delete;
 #endif
 
-  enum class State { INITED = 0, STARTING, STARTED, CANCELED, ERRORED, FINISHED };
+  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 until the activity is terminated */
+  /** Blocks the current actor until the activity is terminated */
   virtual Activity* wait() = 0;
-  /** Blocks until the activity is terminated, or until the timeout is elapsed
+  /** 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;
-  /** Blocks until the activity is terminated, or until the time limit is reached
+  /** 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;
   /** Retrieve the current state of the activity */
-  Activity::State get_state() { return state_; }
+  Activity::State get_state() const { 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;
-  virtual const char* get_cname()       = 0;
-  virtual const std::string& get_name() = 0;
+  /** Tests whether the given activity is terminated yet. */
+  virtual bool test();
+
+  /** Blocks the progression of this activity until it gets resumed */
+  virtual Activity* suspend();
+  /** Unblock the progression of this activity if it was suspended previously */
+  virtual Activity* resume();
+  /** Whether or not the progression of this activity is blocked */
+  bool is_suspended() const { return suspended_; }
+
+  virtual const char* get_cname() const       = 0;
+  virtual const std::string& get_name() const = 0;
 
   /** Get the remaining amount of work that this Activity entails. When it's 0, it's done. */
-  virtual double get_remaining();
+  virtual double get_remaining() const;
   /** Set the [remaining] amount of work that this Activity will entail
    *
    * It is forbidden to change the amount of work once the Activity is started */
@@ -115,10 +121,18 @@ public:
   }
   friend void intrusive_ptr_add_ref(Activity* a) { a->refcount_.fetch_add(1, std::memory_order_relaxed); }
 #endif
+  Activity* add_ref()
+  {
+    intrusive_ptr_add_ref(this);
+    return this;
+  }
+  void unref() { intrusive_ptr_release(this); }
+
 private:
   kernel::activity::ActivityImplPtr pimpl_ = nullptr;
   Activity::State state_                   = Activity::State::INITED;
   double remains_                          = 0;
+  bool suspended_                          = false;
   std::vector<ActivityPtr> successors_;
   std::set<ActivityPtr> dependencies_;
   std::atomic_int_fast32_t refcount_{0};
@@ -142,8 +156,8 @@ public:
     name_ = name;
     return static_cast<AnyActivity*>(this);
   }
-  const std::string& get_name() { return name_; }
-  const char* get_cname() { return name_.c_str(); }
+  const std::string& get_name() const override { return name_; }
+  const char* get_cname() const override { return name_.c_str(); }
 
   AnyActivity* set_tracing_category(const std::string& category)
   {
@@ -151,7 +165,7 @@ public:
     tracing_category_ = category;
     return static_cast<AnyActivity*>(this);
   }
-  const std::string& get_tracing_category() { return tracing_category_; }
+  const std::string& get_tracing_category() const { return tracing_category_; }
 
   AnyActivity* set_user_data(void* data)
   {
@@ -159,7 +173,7 @@ public:
     return static_cast<AnyActivity*>(this);
   }
 
-  void* get_user_data() { return user_data_; }
+  void* get_user_data() const { return user_data_; }
 #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