X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ba7b1790f5e9e792906df0ff12aeb5aababef824..6bc18b576fa4a890d8b9916d292ca67dfbf60dd3:/include/simgrid/s4u/Activity.hpp

diff --git a/include/simgrid/s4u/Activity.hpp b/include/simgrid/s4u/Activity.hpp
index 4db481e1cb..6cd6276393 100644
--- a/include/simgrid/s4u/Activity.hpp
+++ b/include/simgrid/s4u/Activity.hpp
@@ -27,12 +27,17 @@ namespace s4u {
  * - Synchronization activities may possibly be connected to no action.
  */
 class XBT_PUBLIC Activity {
+#ifndef DOXYGEN
   friend Comm;
   friend XBT_PUBLIC void intrusive_ptr_release(Comm * c);
   friend XBT_PUBLIC void intrusive_ptr_add_ref(Comm * c);
   friend Exec;
   friend XBT_PUBLIC void intrusive_ptr_release(Exec * e);
   friend XBT_PUBLIC void intrusive_ptr_add_ref(Exec * e);
+  friend Io;
+  friend XBT_PUBLIC void intrusive_ptr_release(Io* i);
+  friend XBT_PUBLIC void intrusive_ptr_add_ref(Io* i);
+#endif
 
 protected:
   Activity()  = default;
@@ -57,7 +62,7 @@ public:
    *  Raises: timeout exception.*/
   virtual Activity* wait(double timeout) = 0;
   /** Cancel that activity */
-  //virtual void cancel();
+  virtual Activity* cancel() = 0;
   /** Retrieve the current state of the activity */
   Activity::State get_state() { return state_; }