Tentative implementation of Activity::suspend() and resume()

[simgrid.git] / include / simgrid / s4u / Activity.hpp

diff --git a/include/simgrid/s4u/Activity.hpp b/include/simgrid/s4u/Activity.hpp
index 2572d61..4a8789a 100644 (file)
--- a/include/simgrid/s4u/Activity.hpp
+++ b/include/simgrid/s4u/Activity.hpp
@@ -76,12 +76,12 @@ public:
    * 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);
 
@@ -93,6 +93,13 @@ public:
   /** 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() { return suspended_; }
+
   virtual const char* get_cname() const       = 0;
   virtual const std::string& get_name() const = 0;
 
@@ -127,6 +134,7 @@ 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};