1 /* Copyright (c) 2006-2017. The SimGrid Team. All rights reserved. */
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. */
6 #ifndef SIMGRID_S4U_HOST_HPP
7 #define SIMGRID_S4U_HOST_HPP
11 #include <unordered_map>
13 #include "xbt/Extendable.hpp"
14 #include "xbt/signal.hpp"
15 #include "xbt/string.hpp"
18 #include "simgrid/forward.h"
19 #include "simgrid/s4u/forward.hpp"
24 extern template class XBT_PUBLIC() Extendable<simgrid::s4u::Host>;
32 * An host represents some physical resource with computing and networking capabilities.
34 * All hosts are automatically created during the call of the method
35 * @ref simgrid::s4u::Engine::loadPlatform().
36 * You cannot create a host yourself.
38 * You can retrieve a particular host using simgrid::s4u::Host::byName()
39 * and actors can retrieve the host on which they run using simgrid::s4u::Host::current().
41 XBT_PUBLIC_CLASS Host : public simgrid::xbt::Extendable<Host>
45 explicit Host(const char* name);
47 /** Host destruction logic */
52 bool currentlyDestroying_ = false;
57 Host(Host const&) = delete;
58 Host& operator=(Host const&) = delete;
60 /** Retrieves an host from its name, or return nullptr */
61 static Host* by_name_or_null(const char* name);
62 /** Retrieves an host from its name, or return nullptr */
63 static Host* by_name_or_null(std::string name);
64 /** Retrieves an host from its name, or die */
65 static s4u::Host* by_name(std::string name);
66 /** Retrieves the host on which the current actor is running */
67 static s4u::Host* current();
69 simgrid::xbt::string const& getName() const { return name_; }
70 const char* getCname() const { return name_.c_str(); }
72 void actorList(std::vector<ActorPtr> * whereto);
74 /** Turns that host on if it was previously off
76 * All actors on that host which were marked autorestart will be restarted automatically.
77 * This call does nothing if the host is already on.
80 /** Turns that host off. All actors are forcefully stopped. */
82 /** Returns if that host is currently up and running */
84 /** Returns if that host is currently down and offline */
85 bool isOff() { return not isOn(); }
89 std::map<std::string, std::string>* getProperties();
90 const char* getProperty(const char* key);
91 void setProperty(std::string key, std::string value);
92 void getProcesses(std::vector<ActorPtr> * list);
93 double getPstateSpeed(int pstate_index);
94 int getPstatesCount() const;
95 void setPstate(int pstate_index);
97 void getAttachedStorages(std::vector<const char*> * storages);
99 /** Get an associative list [mount point]->[Storage] of all local mount points.
101 * This is defined in the platform file, and cannot be modified programatically (yet).
103 std::unordered_map<std::string, Storage*> const& getMountedStorages();
105 void routeTo(Host * dest, std::vector<Link*> * links, double* latency);
106 void routeTo(Host * dest, std::vector<surf::LinkImpl*> * links, double* latency);
109 simgrid::xbt::string name_ = "noname";
110 std::unordered_map<std::string, Storage*>* mounts = nullptr; // caching
113 // TODO, this could be a unique_ptr
114 surf::HostImpl* pimpl_ = nullptr;
115 /** DO NOT USE DIRECTLY (@todo: these should be protected, once our code is clean) */
116 surf::Cpu* pimpl_cpu = nullptr;
117 /** DO NOT USE DIRECTLY (@todo: these should be protected, once our code is clean) */
118 kernel::routing::NetPoint* pimpl_netpoint = nullptr;
120 /*** Called on each newly created host */
121 static simgrid::xbt::signal<void(Host&)> onCreation;
122 /*** Called just before destructing an host */
123 static simgrid::xbt::signal<void(Host&)> onDestruction;
124 /*** Called when the machine is turned on or off (called AFTER the change) */
125 static simgrid::xbt::signal<void(Host&)> onStateChange;
126 /*** Called when the speed of the machine is changed (called AFTER the change)
127 * (either because of a pstate switch or because of an external load event coming from the profile) */
128 static simgrid::xbt::signal<void(Host&)> onSpeedChange;
131 } // namespace simgrid::s4u
133 extern int USER_HOST_LEVEL;
135 #endif /* SIMGRID_S4U_HOST_HPP */
142 * This method returns the number of tasks currently running on a host.
143 * The external load (coming from an availability trace) is not taken in account.
145 * @return The number of tasks currently running on a host.
147 public native int getLoad();