src/kernel/activity/SynchroRaw.cpp

   1 /* Copyright (c) 2007-2019. 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/SynchroRaw.hpp"
   7 #include "simgrid/Exception.hpp"
   8 #include "simgrid/kernel/resource/Action.hpp"
   9 #include "src/kernel/activity/ConditionVariableImpl.hpp"
  10 #include "src/kernel/activity/MutexImpl.hpp"
  11 #include "src/kernel/activity/SemaphoreImpl.hpp"
  12 #include "src/kernel/context/Context.hpp"
  13 #include "src/surf/cpu_interface.hpp"
  14 #include "src/surf/surf_interface.hpp"
  15 #include <simgrid/s4u/Host.hpp>
  16
  17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_synchro, simix, "SIMIX Synchronization (mutex, semaphores and conditions)");
  18
  19 namespace simgrid {
  20 namespace kernel {
  21 namespace activity {
  22
  23 RawImpl& RawImpl::set_host(s4u::Host* host)
  24 {
  25   host_ = host;
  26   return *this;
  27 }
  28 RawImpl& RawImpl::set_timeout(double timeout)
  29 {
  30   timeout_ = timeout;
  31   return *this;
  32 }
  33
  34 RawImpl* RawImpl::start()
  35 {
  36   surf_action_ = host_->pimpl_cpu->sleep(timeout_);
  37   surf_action_->set_activity(this);
  38   return this;
  39 }
  40
  41 void RawImpl::suspend()
  42 {
  43   /* The suspension of raw synchros is delayed to when the process is rescheduled. */
  44 }
  45
  46 void RawImpl::resume()
  47 {
  48   /* I cannot resume raw synchros directly. This is delayed to when the process is rescheduled at
  49    * the end of the synchro. */
  50 }
  51
  52 void RawImpl::cancel()
  53 {
  54   /* I cannot cancel raw synchros directly. */
  55 }
  56
  57 void RawImpl::post()
  58 {
  59   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  60     state_ = SIMIX_FAILED;
  61   } else if (surf_action_->get_state() == resource::Action::State::FINISHED) {
  62     state_ = SIMIX_SRC_TIMEOUT;
  63   }
  64   finish();
  65 }
  66
  67 void RawImpl::finish()
  68 {
  69   smx_simcall_t simcall = simcalls_.front();
  70   simcalls_.pop_front();
  71
  72   if (state_ == SIMIX_FAILED) {
  73     XBT_DEBUG("RawImpl::finish(): host '%s' failed", simcall->issuer_->get_host()->get_cname());
  74     simcall->issuer_->context_->iwannadie = true;
  75     simcall->issuer_->exception_ = std::make_exception_ptr(HostFailureException(XBT_THROW_POINT, "Host failed"));
  76   } else if (state_ != SIMIX_SRC_TIMEOUT) {
  77     xbt_die("Internal error in RawImpl::finish() unexpected synchro state %d", static_cast<int>(state_));
  78   }
  79
  80   switch (simcall->call_) {
  81
  82     case SIMCALL_MUTEX_LOCK:
  83       simgrid::xbt::intrusive_erase(simcall_mutex_lock__get__mutex(simcall)->sleeping_, *simcall->issuer_);
  84       break;
  85
  86     case SIMCALL_COND_WAIT:
  87       simgrid::xbt::intrusive_erase(simcall_cond_wait__get__cond(simcall)->sleeping_, *simcall->issuer_);
  88       break;
  89
  90     case SIMCALL_COND_WAIT_TIMEOUT:
  91       simgrid::xbt::intrusive_erase(simcall_cond_wait_timeout__get__cond(simcall)->sleeping_, *simcall->issuer_);
  92       simcall_cond_wait_timeout__set__result(simcall, 1); // signal a timeout
  93       break;
  94
  95     case SIMCALL_SEM_ACQUIRE:
  96       simgrid::xbt::intrusive_erase(simcall_sem_acquire__get__sem(simcall)->sleeping_, *simcall->issuer_);
  97       break;
  98
  99     case SIMCALL_SEM_ACQUIRE_TIMEOUT:
 100       simgrid::xbt::intrusive_erase(simcall_sem_acquire_timeout__get__sem(simcall)->sleeping_, *simcall->issuer_);
 101       simcall_sem_acquire_timeout__set__result(simcall, 1); // signal a timeout
 102       break;
 103
 104     default:
 105       THROW_IMPOSSIBLE;
 106   }
 107   simcall->issuer_->waiting_synchro = nullptr;
 108   simcall->issuer_->simcall_answer();
 109 }
 110
 111 } // namespace activity
 112 } // namespace kernel
 113 } // namespace simgrid