src/surf/virtual_machine.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include <xbt/signal.hpp>
   8
   9 #include "cpu_cas01.hpp"
  10 #include "virtual_machine.hpp"
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm, surf, "Logging specific to the SURF VM module");
  13
  14 simgrid::surf::VMModel *surf_vm_model = nullptr;
  15
  16 namespace simgrid {
  17 namespace surf {
  18
  19 /*************
  20  * Callbacks *
  21  *************/
  22
  23 simgrid::xbt::signal<void(simgrid::surf::VirtualMachine*)> VMCreatedCallbacks;
  24 simgrid::xbt::signal<void(simgrid::surf::VirtualMachine*)> VMDestructedCallbacks;
  25 simgrid::xbt::signal<void(simgrid::surf::VirtualMachine*)> VMStateChangedCallbacks;
  26
  27 /*********
  28  * Model *
  29  *********/
  30
  31 VMModel::vm_list_t VMModel::ws_vms;
  32
  33 /************
  34  * Resource *
  35  ************/
  36
  37 VirtualMachine::VirtualMachine(HostModel *model, const char *name, simgrid::s4u::Host *hostPM)
  38 : HostImpl(model, name, nullptr, nullptr, nullptr)
  39 , hostPM_(hostPM)
  40 {
  41   VMModel::ws_vms.push_back(*this);
  42   simgrid::s4u::Host::by_name_or_create(name)->extension_set<simgrid::surf::HostImpl>(this);
  43 }
  44
  45 /*
  46  * A physical host does not disappear in the current SimGrid code, but a VM may disappear during a simulation.
  47  */
  48 VirtualMachine::~VirtualMachine()
  49 {
  50   VMDestructedCallbacks(this);
  51   VMModel::ws_vms.erase(VMModel::vm_list_t::s_iterator_to(*this));
  52   /* Free the cpu_action of the VM. */
  53   XBT_ATTRIB_UNUSED int ret = action_->unref();
  54   xbt_assert(ret == 1, "Bug: some resource still remains");
  55 }
  56
  57 e_surf_vm_state_t VirtualMachine::getState() {
  58   return p_vm_state;
  59 }
  60
  61 void VirtualMachine::setState(e_surf_vm_state_t state) {
  62   p_vm_state = state;
  63 }
  64 void VirtualMachine::turnOn() {
  65   if (isOff()) {
  66     Resource::turnOn();
  67     VMStateChangedCallbacks(this);
  68   }
  69 }
  70 void VirtualMachine::turnOff() {
  71   if (isOn()) {
  72     Resource::turnOff();
  73     VMStateChangedCallbacks(this);
  74   }
  75 }
  76
  77 /** @brief returns the physical machine on which the VM is running **/
  78 sg_host_t VirtualMachine::getPm() {
  79   return hostPM_;
  80 }
  81
  82 }
  83 }