1 /* Copyright (c) 2004-2021. 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_KERNEL_RESOURCE_RESOURCE_HPP
7 #define SIMGRID_KERNEL_RESOURCE_RESOURCE_HPP
9 #include "src/kernel/lmm/maxmin.hpp" // Constraint
10 #include "src/kernel/resource/profile/FutureEvtSet.hpp"
11 #include "src/kernel/resource/profile/Profile.hpp"
12 #include <simgrid/forward.h>
13 #include <xbt/signal.hpp>
15 #include <xbt/utility.hpp>
23 /** @ingroup SURF_interface
24 * @brief SURF resource interface class
25 * @details This is the ancestor class of every resources in SimGrid, such as links, CPU or disk
27 class XBT_PUBLIC Resource {
28 std::string name_ = "unnamed";
34 double peak; /**< The peak of the metric, ie its max value */
35 double scale; /**< Current availability of the metric according to the profiles, in [0,1] */
36 profile::Event* event; /**< The associated profile event associated to the metric */
38 profile::Event* state_event_ = nullptr;
41 explicit Resource(const std::string& name) : name_(name){};
42 virtual ~Resource() = default;
43 virtual void seal() { sealed_ = true; }
45 /** @brief Get the name of the current Resource */
46 const std::string& get_name() const { return name_; }
47 /** @brief Get the name of the current Resource */
48 const char* get_cname() const { return name_.c_str(); }
50 bool operator==(const Resource& other) const { return name_ == other.name_; }
52 /** @brief Apply an event of external load event to that resource */
53 virtual void apply_event(profile::Event* event, double value) = 0;
55 /** @brief Check if the current Resource is used (if it currently serves an action) */
56 virtual bool is_used() const = 0;
58 /** @brief Check if the current Resource is active */
59 virtual bool is_on() const { return is_on_; }
60 virtual bool is_sealed() const { return sealed_; }
62 /** @brief Turn on the current Resource */
63 virtual void turn_on() { is_on_ = true; }
64 /** @brief Turn off the current Resource */
65 virtual void turn_off() { is_on_ = false; }
68 template <class AnyResource> class Resource_T : public Resource {
69 Model* model_ = nullptr;
70 lmm::Constraint* constraint_ = nullptr;
73 using Resource::Resource;
74 /** @brief setup the profile file with states events (ON or OFF). The profile must contain boolean values. */
75 AnyResource* set_state_profile(profile::Profile* profile)
78 xbt_assert(state_event_ == nullptr, "Cannot set a second state profile to %s", get_cname());
79 state_event_ = profile->schedule(&profile::future_evt_set, this);
82 return static_cast<AnyResource*>(this);
85 AnyResource* set_model(Model* model)
88 return static_cast<AnyResource*>(this);
91 Model* get_model() const { return model_; }
93 AnyResource* set_constraint(lmm::Constraint* constraint)
95 constraint_ = constraint;
96 return static_cast<AnyResource*>(this);
99 lmm::Constraint* get_constraint() const { return constraint_; }
101 /** @brief returns the current load due to activities (in flops per second, byte per second or similar)
103 * The load due to external usages modeled by profile files is ignored.*/
104 virtual double get_load() const { return constraint_->get_usage(); }
107 } // namespace resource
108 } // namespace kernel
109 } // namespace simgrid
112 template <> class hash<simgrid::kernel::resource::Resource> {
114 std::size_t operator()(const simgrid::kernel::resource::Resource& r) const
116 return (std::size_t)xbt_str_hash(r.get_cname());