X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3a1f39020e3e8b690e7dad38dc15d36bfb8d9b19..48eb2f1b9262fc74f527816c348ed2aa6efa9f65:/src/simix/ActorImpl.hpp

diff --git a/src/simix/ActorImpl.hpp b/src/simix/ActorImpl.hpp
index f2a18a6240..952546bae0 100644
--- a/src/simix/ActorImpl.hpp
+++ b/src/simix/ActorImpl.hpp
@@ -9,12 +9,13 @@
 #include "simgrid/s4u/Actor.hpp"
 #include "src/simix/popping_private.h"
 #include "xbt/swag.h"
-#include<list>
+#include <list>
 
 typedef struct s_smx_process_exit_fun {
   int_f_pvoid_pvoid_t fun;
   void *arg;
-} s_smx_process_exit_fun_t, *smx_process_exit_fun_t;
+} s_smx_process_exit_fun_t;
+typedef s_smx_process_exit_fun_t* smx_process_exit_fun_t;
 
 namespace simgrid {
 namespace simix {
@@ -55,12 +56,12 @@ public:
   bool suspended    = false;
   bool auto_restart = false;
 
-  sg_host_t new_host            = nullptr; /* if not null, the host on which the process must migrate to */
+  sg_host_t new_host             = nullptr; /* if not null, the host on which the process must migrate to */
   smx_activity_t waiting_synchro = nullptr; /* the current blocking synchro if any */
   std::list<smx_activity_t> comms;          /* the current non-blocking communication synchros */
   xbt_dict_t properties         = nullptr;
   s_smx_simcall_t simcall;
-  void *data          = nullptr; /* kept for compatibility, it should be replaced with moddata */
+  void* userdata = nullptr;                      /* kept for compatibility, it should be replaced with moddata */
   std::vector<s_smx_process_exit_fun_t> on_exit; /* list of functions executed when the process dies */
 
   std::function<void()> code;
@@ -69,16 +70,23 @@ public:
 
   /* Refcounting */
 private:
-  std::atomic_int_fast32_t refcount_{1};
+  std::atomic_int_fast32_t refcount_{0};
+
 public:
   friend void intrusive_ptr_add_ref(ActorImpl* process)
   {
-    process->refcount_.fetch_add(1, std::memory_order_relaxed);
+    // std::memory_order_relaxed ought to be enough here instead of std::memory_order_seq_cst
+    // But then, we have a threading issue when an actor commits a suicide:
+    //  it seems that in this case, the worker thread kills the last occurrence of the actor
+    //  while usually, the maestro does so. FIXME: we should change how actors suicide
+    process->refcount_.fetch_add(1, std::memory_order_seq_cst);
   }
   friend void intrusive_ptr_release(ActorImpl* process)
   {
     // inspired from http://www.boost.org/doc/libs/1_55_0/doc/html/atomic/usage_examples.html
     if (process->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
+      // Make sure that any changes done on other threads before their acquire are committed before our delete
+      // http://stackoverflow.com/questions/27751025/why-is-an-acquire-barrier-needed-before-deleting-the-data-in-an-atomically-refer
       std::atomic_thread_fence(std::memory_order_acquire);
       delete process;
     }
@@ -96,7 +104,14 @@ private:
   bool daemon = false;
 public:
   void daemonize();
-  bool isDaemon();
+  bool isDaemon() { return daemon; } /** Whether this actor has been daemonized */
+  bool isSuspended() { return suspended; }
+  simgrid::s4u::Actor* restart();
+  smx_activity_t suspend(ActorImpl* issuer);
+  void resume();
+  smx_activity_t sleep(double duration);
+  void setUserData(void* data) { userdata = data; }
+  void* getUserData() { return userdata; }
 };
 
 }
@@ -124,23 +139,16 @@ XBT_PRIVATE void SIMIX_process_empty_trash();
 XBT_PRIVATE void SIMIX_process_yield(smx_actor_t self);
 XBT_PRIVATE void SIMIX_process_exception_terminate(xbt_ex_t * e);
 XBT_PRIVATE void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest);
-XBT_PRIVATE smx_activity_t SIMIX_process_suspend(smx_actor_t process, smx_actor_t issuer);
-XBT_PRIVATE void SIMIX_process_resume(smx_actor_t process);
-XBT_PRIVATE int SIMIX_process_get_PID(smx_actor_t self);
 XBT_PRIVATE void SIMIX_process_set_data(smx_actor_t process, void *data);
 XBT_PRIVATE smx_actor_t SIMIX_process_get_by_name(const char* name);
-XBT_PRIVATE int SIMIX_process_is_suspended(smx_actor_t process);
-XBT_PRIVATE xbt_dict_t SIMIX_process_get_properties(smx_actor_t process);
-XBT_PRIVATE smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout);
-XBT_PRIVATE smx_activity_t SIMIX_process_sleep(smx_actor_t process, double duration);
 
-XBT_PRIVATE void SIMIX_process_sleep_destroy(smx_activity_t synchro);
 XBT_PRIVATE void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart);
-XBT_PRIVATE smx_actor_t SIMIX_process_restart(smx_actor_t process, smx_actor_t issuer);
 
-void SIMIX_segment_index_set(smx_actor_t process, int segment_index);
 extern void (*SMPI_switch_data_segment)(int dest);
 
 SG_END_DECL()
 
+XBT_PRIVATE void SIMIX_process_sleep_destroy(smx_activity_t synchro);
+XBT_PRIVATE smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout);
+
 #endif