src/kernel/activity/ActivityImpl.cpp

   1 /* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #include "src/kernel/activity/ActivityImpl.hpp"
   7 #include "simgrid/modelchecker.h"
   8 #include "src/mc/mc_replay.hpp"
   9 #include "src/simix/smx_private.hpp"
  10 #include <cmath> // isfinite()
  11
  12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_process);
  13
  14 namespace simgrid {
  15 namespace kernel {
  16 namespace activity {
  17
  18 ActivityImpl::~ActivityImpl()
  19 {
  20   clean_action();
  21   XBT_DEBUG("Destroy activity %p", this);
  22 }
  23
  24 void ActivityImpl::register_simcall(smx_simcall_t simcall)
  25 {
  26   simcalls_.push_back(simcall);
  27   simcall->issuer_->waiting_synchro_ = this;
  28 }
  29
  30 void ActivityImpl::clean_action()
  31 {
  32   if (surf_action_) {
  33     surf_action_->unref();
  34     surf_action_ = nullptr;
  35   }
  36 }
  37
  38 double ActivityImpl::get_remaining() const
  39 {
  40   return surf_action_ ? surf_action_->get_remains() : 0;
  41 }
  42
  43 const char* ActivityImpl::get_state_str() const
  44 {
  45   switch (state_) {
  46     case State::WAITING:
  47       return "WAITING";
  48
  49     case State::READY:
  50       return "READY";
  51
  52     case State::RUNNING:
  53       return "RUNNING";
  54
  55     case State::CANCELED:
  56       return "CANCELED";
  57
  58     case State::FAILED:
  59       return "FAILED";
  60
  61     case State::DONE:
  62       return "DONE";
  63
  64     case State::SRC_HOST_FAILURE:
  65       return "SRC_HOST_FAILURE";
  66
  67     case State::DST_HOST_FAILURE:
  68       return "DST_HOST_FAILURE";
  69
  70     case State::TIMEOUT:
  71       return "TIMEOUT";
  72
  73     case State::SRC_TIMEOUT:
  74       return "SRC_TIMEOUT";
  75     case State::DST_TIMEOUT:
  76       return "DST_TIMEOUT";
  77
  78     case State::LINK_FAILURE:
  79       return "LINK_FAILURE";
  80   }
  81   THROW_IMPOSSIBLE;
  82 }
  83
  84 bool ActivityImpl::test()
  85 {
  86   if (state_ != State::WAITING && state_ != State::RUNNING) {
  87     finish();
  88     return true;
  89   }
  90   return false;
  91 }
  92
  93 void ActivityImpl::wait_for(actor::ActorImpl* issuer, double timeout)
  94 {
  95   XBT_DEBUG("Wait for execution of synchro %p, state %d", this, (int)state_);
  96   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
  97
  98   /* Associate this simcall to the synchro */
  99   register_simcall(&issuer->simcall_);
 100
 101   if (MC_is_active() || MC_record_replay_is_active()) {
 102     int idx = SIMCALL_GET_MC_VALUE(issuer->simcall_);
 103     if (idx == 0) {
 104       state_ = simgrid::kernel::activity::State::DONE;
 105     } else {
 106       /* If we reached this point, the wait simcall must have a timeout */
 107       /* Otherwise it shouldn't be enabled and executed by the MC */
 108       if (timeout < 0.0)
 109         THROW_IMPOSSIBLE;
 110       state_ = simgrid::kernel::activity::State::TIMEOUT;
 111     }
 112     finish();
 113     return;
 114   }
 115
 116   /* If the synchro is already finished then perform the error handling */
 117   if (state_ != simgrid::kernel::activity::State::RUNNING)
 118     finish();
 119   else {
 120     /* we need a sleep action (even when there is no timeout) to be notified of host failures */
 121     set_timeout(timeout);
 122   }
 123 }
 124
 125 void ActivityImpl::suspend()
 126 {
 127   if (surf_action_ == nullptr)
 128     return;
 129   XBT_VERB("This activity is suspended (remain: %f)", surf_action_->get_remains());
 130   surf_action_->suspend();
 131   on_suspended(*this);
 132 }
 133
 134 void ActivityImpl::resume()
 135 {
 136   if (surf_action_ == nullptr)
 137     return;
 138   XBT_VERB("This activity is resumed (remain: %f)", surf_action_->get_remains());
 139   surf_action_->resume();
 140   on_resumed(*this);
 141 }
 142
 143 void ActivityImpl::cancel()
 144 {
 145   XBT_VERB("Activity %p is canceled", this);
 146   if (surf_action_ != nullptr)
 147     surf_action_->cancel();
 148   state_ = State::CANCELED;
 149 }
 150
 151 // boost::intrusive_ptr<Activity> support:
 152 void intrusive_ptr_add_ref(simgrid::kernel::activity::ActivityImpl* activity)
 153 {
 154   activity->refcount_.fetch_add(1, std::memory_order_relaxed);
 155 }
 156
 157 void intrusive_ptr_release(simgrid::kernel::activity::ActivityImpl* activity)
 158 {
 159   if (activity->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
 160     std::atomic_thread_fence(std::memory_order_acquire);
 161     delete activity;
 162   }
 163 }
 164 xbt::signal<void(ActivityImpl const&)> ActivityImpl::on_resumed;
 165 xbt::signal<void(ActivityImpl const&)> ActivityImpl::on_suspended;
 166 }
 167 }
 168 } // namespace simgrid::kernel::activity::