1 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMIX_ACTORIMPL_H
7 #define SIMIX_ACTORIMPL_H
9 #include "simgrid/s4u/Actor.hpp"
10 #include "src/simix/popping_private.hpp"
11 #include "src/surf/PropertyHolder.hpp"
12 #include <boost/intrusive/list.hpp>
16 struct s_smx_process_exit_fun_t {
17 int_f_pvoid_pvoid_t fun;
27 std::function<void()> code;
29 sg_host_t host = nullptr;
30 double kill_time = 0.0;
31 std::shared_ptr<std::map<std::string, std::string>> properties;
32 bool auto_restart = false;
35 class ActorImpl : public simgrid::surf::PropertyHolder {
37 ActorImpl() : piface_(this) {}
40 boost::intrusive::list_member_hook<> host_process_list_hook; /* simgrid::simix::Host::process_list */
41 boost::intrusive::list_member_hook<> smx_destroy_list_hook; /* simix_global->process_to_destroy */
42 boost::intrusive::list_member_hook<> smx_synchro_hook; /* {mutex,cond,sem}->sleeping */
46 simgrid::xbt::string name;
47 const simgrid::xbt::string& getName() const { return name; }
48 const char* getCname() const { return name.c_str(); }
49 s4u::Host* host = nullptr; /* the host on which the process is running */
50 smx_context_t context = nullptr; /* the context (uctx/raw/thread) that executes the user function */
53 std::exception_ptr exception;
54 bool finished = false;
56 bool suspended = false;
57 bool auto_restart = false;
59 sg_host_t new_host = nullptr; /* if not null, the host on which the process must migrate to */
60 smx_activity_t waiting_synchro = nullptr; /* the current blocking synchro if any */
61 std::list<smx_activity_t> comms; /* the current non-blocking communication synchros */
62 s_smx_simcall_t simcall;
63 void* userdata = nullptr; /* kept for compatibility, it should be replaced with moddata */
64 std::vector<s_smx_process_exit_fun_t> on_exit; /* list of functions executed when the process dies */
66 std::function<void()> code;
67 smx_timer_t kill_timer = nullptr;
68 int segment_index = -1; /* Reference to an SMPI process' data segment. Default value is -1 if not in SMPI context*/
72 std::atomic_int_fast32_t refcount_{0};
75 friend void intrusive_ptr_add_ref(ActorImpl* process)
77 // std::memory_order_relaxed ought to be enough here instead of std::memory_order_seq_cst
78 // But then, we have a threading issue when an actor commits a suicide:
79 // it seems that in this case, the worker thread kills the last occurrence of the actor
80 // while usually, the maestro does so. FIXME: we should change how actors suicide
81 process->refcount_.fetch_add(1, std::memory_order_seq_cst);
83 friend void intrusive_ptr_release(ActorImpl* process)
85 // inspired from http://www.boost.org/doc/libs/1_55_0/doc/html/atomic/usage_examples.html
86 if (process->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
87 // Make sure that any changes done on other threads before their acquire are committed before our delete
88 // http://stackoverflow.com/questions/27751025/why-is-an-acquire-barrier-needed-before-deleting-the-data-in-an-atomically-refer
89 std::atomic_thread_fence(std::memory_order_acquire);
94 /* S4U/implem interfaces */
96 simgrid::s4u::Actor piface_; // Our interface is part of ourselves
98 simgrid::s4u::ActorPtr iface() { return s4u::ActorPtr(&piface_); }
99 simgrid::s4u::Actor* ciface() { return &piface_; }
101 /* Daemon actors are automatically killed when the last non-daemon leaves */
106 bool isDaemon() { return daemon; } /** Whether this actor has been daemonized */
107 bool isSuspended() { return suspended; }
108 simgrid::s4u::Actor* restart();
109 smx_activity_t suspend(ActorImpl* issuer);
111 smx_activity_t sleep(double duration);
112 void setUserData(void* data) { userdata = data; }
113 void* getUserData() { return userdata; }
119 typedef simgrid::simix::ProcessArg *smx_process_arg_t;
121 typedef simgrid::simix::ActorImpl* smx_actor_t;
125 XBT_PRIVATE smx_actor_t SIMIX_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
126 std::map<std::string, std::string>* properties,
127 smx_actor_t parent_process);
129 XBT_PRIVATE void SIMIX_process_runall();
130 XBT_PRIVATE void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer);
131 XBT_PRIVATE void SIMIX_process_killall(smx_actor_t issuer, int reset_pid);
132 XBT_PRIVATE void SIMIX_process_cleanup(smx_actor_t arg);
133 XBT_PRIVATE void SIMIX_process_empty_trash();
134 XBT_PRIVATE void SIMIX_process_yield(smx_actor_t self);
135 XBT_PRIVATE void SIMIX_process_exception_terminate(xbt_ex_t * e);
136 XBT_PRIVATE void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest);
137 XBT_PRIVATE void SIMIX_process_set_data(smx_actor_t process, void *data);
138 XBT_PRIVATE smx_actor_t SIMIX_process_get_by_name(const char* name);
140 XBT_PRIVATE void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart);
142 extern void (*SMPI_switch_data_segment)(int dest);
145 XBT_PRIVATE void SIMIX_process_sleep_destroy(smx_activity_t synchro);
146 XBT_PRIVATE smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout);