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try to use more standard, less obscure synchro for refcounting
[simgrid.git] / src / simix / ActorImpl.hpp
index 8ebe7db..9e4930d 100644 (file)
@@ -3,21 +3,13 @@
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#ifndef _SIMIX_ACTORIMPL_H
-#define _SIMIX_ACTORIMPL_H
+#ifndef SIMIX_ACTORIMPL_H
+#define SIMIX_ACTORIMPL_H
 
-#include <atomic>
-#include <functional>
-#include <string>
-
-#include <xbt/base.h>
-#include <xbt/string.hpp>
-
-#include <simgrid/simix.hpp>
-#include <simgrid/s4u/Actor.hpp>
-
-#include "simgrid/simix.h"
-#include "popping_private.h"
+#include "simgrid/s4u/Actor.hpp"
+#include "src/simix/popping_private.h"
+#include "xbt/swag.h"
+#include<list>
 
 typedef struct s_smx_process_exit_fun {
   int_f_pvoid_pvoid_t fun;
@@ -32,7 +24,7 @@ public:
   std::string name;
   std::function<void()> code;
   void *data            = nullptr;
-  const char *hostname  = nullptr;
+  sg_host_t host        = nullptr;
   double kill_time      = 0.0;
   xbt_dict_t properties = nullptr;
   bool auto_restart     = false;
@@ -49,9 +41,10 @@ public:
   s_xbt_swag_hookup_t destroy_hookup   = { nullptr, nullptr }; /* simix_global->process_to_destroy */
 
   unsigned long pid  = 0;
-  unsigned long ppid = 0;
+  unsigned long ppid = -1;
   simgrid::xbt::string name;
-  sg_host_t host        = nullptr; /* the host on which the process is running */
+  const char* cname() { return name.c_str(); }
+  s4u::Host* host       = nullptr; /* the host on which the process is running */
   smx_context_t context = nullptr; /* the context (uctx/raw/thread) that executes the user function */
 
   // TODO, pack them
@@ -63,38 +56,41 @@ public:
 
   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 */
-  xbt_fifo_t comms              = nullptr; /* the current non-blocking communication synchros */
+  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 */
-  xbt_dynar_t on_exit = nullptr; /* list of functions executed when the process dies */
+  std::vector<s_smx_process_exit_fun_t> on_exit; /* list of functions executed when the process dies */
 
   std::function<void()> code;
   smx_timer_t kill_timer = nullptr;
-  int segment_index      = 0; /* Reference to an SMPI process' data segment. Default value is -1 if not in SMPI context*/
+  int segment_index = -1; /* Reference to an SMPI process' data segment. Default value is -1 if not in SMPI context*/
 
   friend void intrusive_ptr_add_ref(ActorImpl* process)
   {
-    // Atomic operation! Do not split in two instructions!
-    auto previous = (process->refcount_)++;
-    xbt_assert(previous != 0);
-    (void) previous;
+    process->refcount_.fetch_add(1, std::memory_order_relaxed);
   }
   friend void intrusive_ptr_release(ActorImpl* process)
   {
-    // Atomic operation! Do not split in two instructions!
-    auto count = --(process->refcount_);
-    if (count == 0)
+    // 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) {
+      std::atomic_thread_fence(std::memory_order_acquire);
       delete process;
+    }
   }
 
   ~ActorImpl();
 
-  simgrid::s4u::Actor& getIface() { return piface_; }
+  simgrid::s4u::ActorPtr iface() { return s4u::ActorPtr(&piface_); }
+  simgrid::s4u::Actor* ciface() { return &piface_; }
+
+  void daemonize();
+  bool isDaemon();
 
 private:
+  bool daemon = false;
   std::atomic_int_fast32_t refcount_ { 1 };
-  simgrid::s4u::Actor piface_;
+  simgrid::s4u::Actor piface_; // Our interface is part of ourselves
 };
 
 }
@@ -102,45 +98,41 @@ private:
 
 typedef simgrid::simix::ProcessArg *smx_process_arg_t;
 
-typedef simgrid::simix::ActorImpl* smx_process_t;
+typedef simgrid::simix::ActorImpl* smx_actor_t;
 
 SG_BEGIN_DECL()
 
-XBT_PRIVATE smx_process_t SIMIX_process_create(
+XBT_PRIVATE smx_actor_t SIMIX_process_create(
                           const char *name,
                           std::function<void()> code,
                           void *data,
-                          const char *hostname,
-                          double kill_time,
+                          sg_host_t host,
                           xbt_dict_t properties,
-                          int auto_restart,
-                          smx_process_t parent_process);
+                          smx_actor_t parent_process);
 
 XBT_PRIVATE void SIMIX_process_runall();
-XBT_PRIVATE void SIMIX_process_kill(smx_process_t process, smx_process_t issuer);
-XBT_PRIVATE void SIMIX_process_killall(smx_process_t issuer, int reset_pid);
-XBT_PRIVATE void SIMIX_process_stop(smx_process_t arg);
-XBT_PRIVATE void SIMIX_process_cleanup(smx_process_t arg);
+XBT_PRIVATE void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer);
+XBT_PRIVATE void SIMIX_process_killall(smx_actor_t issuer, int reset_pid);
+XBT_PRIVATE void SIMIX_process_cleanup(smx_actor_t arg);
 XBT_PRIVATE void SIMIX_process_empty_trash();
-XBT_PRIVATE void SIMIX_process_yield(smx_process_t self);
+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_process_t process, sg_host_t dest);
-XBT_PRIVATE smx_activity_t SIMIX_process_suspend(smx_process_t process, smx_process_t issuer);
-XBT_PRIVATE void SIMIX_process_resume(smx_process_t process, smx_process_t issuer);
-XBT_PRIVATE int SIMIX_process_get_PID(smx_process_t self);
-XBT_PRIVATE void* SIMIX_process_get_data(smx_process_t process);
-XBT_PRIVATE void SIMIX_process_set_data(smx_process_t process, void *data);
-XBT_PRIVATE smx_process_t SIMIX_process_get_by_name(const char* name);
-XBT_PRIVATE int SIMIX_process_is_suspended(smx_process_t process);
-XBT_PRIVATE xbt_dict_t SIMIX_process_get_properties(smx_process_t process);
-XBT_PRIVATE smx_activity_t SIMIX_process_join(smx_process_t issuer, smx_process_t process, double timeout);
-XBT_PRIVATE smx_activity_t SIMIX_process_sleep(smx_process_t process, double duration);
+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_process_t process, int auto_restart);
-XBT_PRIVATE smx_process_t SIMIX_process_restart(smx_process_t process, smx_process_t issuer);
+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_process_t process, int segment_index);
+void SIMIX_segment_index_set(smx_actor_t process, int segment_index);
 extern void (*SMPI_switch_data_segment)(int dest);
 
 SG_END_DECL()