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