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[simgrid.git] / 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 }