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::start(s4u::Host* host, double timeout)
  24 {
  25   surf_action_ = host->pimpl_cpu->sleep(timeout);
  26   surf_action_->set_data(this);
  27   return this;
  28 }
  29
  30 RawImpl::~RawImpl()
  31 {
  32   surf_action_->unref();
  33 }
  34
  35 void RawImpl::suspend()
  36 {
  37   /* The suspension of raw synchros is delayed to when the process is rescheduled. */
  38 }
  39
  40 void RawImpl::resume()
  41 {
  42   /* I cannot resume raw synchros directly. This is delayed to when the process is rescheduled at
  43    * the end of the synchro. */
  44 }
  45 void RawImpl::post()
  46 {
  47   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  48     state_ = SIMIX_FAILED;
  49   } else if (surf_action_->get_state() == resource::Action::State::FINISHED) {
  50     state_ = SIMIX_SRC_TIMEOUT;
  51   }
  52   finish();
  53 }
  54
  55 void RawImpl::finish()
  56 {
  57   smx_simcall_t simcall = simcalls_.front();
  58   simcalls_.pop_front();
  59
  60   switch (state_) {
  61     case SIMIX_DONE:
  62       /* do nothing, synchro done */
  63       XBT_DEBUG("RawImpl::finish(): execution successful");
  64       break;
  65
  66     case SIMIX_FAILED:
  67       XBT_DEBUG("RawImpl::finish(): host '%s' failed", simcall->issuer->get_host()->get_cname());
  68       simcall->issuer->context_->iwannadie = true;
  69       simcall->issuer->exception_ =
  70           std::make_exception_ptr(simgrid::HostFailureException(XBT_THROW_POINT, "Host failed"));
  71       break;
  72     case SIMIX_SRC_TIMEOUT:
  73       simcall->issuer->exception_ =
  74           std::make_exception_ptr(simgrid::TimeoutError(XBT_THROW_POINT, "Synchronization timeout"));
  75       break;
  76     default:
  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   SIMIX_simcall_answer(simcall);
 109 }
 110
 111 } // namespace activity
 112 } // namespace kernel
 113 } // namespace simgrid