-/* Copyright (c) 2004-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2004-2023. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
*/
class XBT_PUBLIC Link : public xbt::Extendable<Link> {
#ifndef DOXYGEN
- friend kernel::resource::LinkImpl;
+ friend kernel::resource::StandardLinkImpl;
#endif
protected:
// Links are created from the NetZone, and destroyed by their private implementation when the simulation ends
- explicit Link(kernel::resource::LinkImplIntf* pimpl) : pimpl_(pimpl) {}
+ explicit Link(kernel::resource::LinkImpl* pimpl) : pimpl_(pimpl) {}
virtual ~Link() = default;
// The implementation that never changes
- kernel::resource::LinkImplIntf* const pimpl_;
+ kernel::resource::LinkImpl* const pimpl_;
+#ifndef DOXYGEN
+ friend kernel::resource::NetworkAction; // signal comm_state_changed
+#endif
public:
- enum class SharingPolicy { WIFI = 3, SPLITDUPLEX = 2, SHARED = 1, FATPIPE = 0 };
+ enum class SharingPolicy { NONLINEAR = 4, WIFI = 3, SPLITDUPLEX = 2, SHARED = 1, FATPIPE = 0 };
- kernel::resource::LinkImpl* get_impl() const;
+ kernel::resource::StandardLinkImpl* get_impl() const;
/** @brief Retrieve a link from its name */
static Link* by_name(const std::string& name);
/**
* @brief Set latency (string version)
*
+ * Accepts values with units, such as '1s' or '7ms'.
+ *
+ * Full list of accepted units: w (week), d (day), h, s, ms, us, ns, ps.
+ *
* @throw std::invalid_argument if latency format is incorrect.
*/
Link* set_latency(const std::string& value);
- /** @brief Describes how the link is shared between flows */
- Link* set_sharing_policy(SharingPolicy policy);
+ /** @brief Describes how the link is shared between flows
+ *
+ * Note that the NONLINEAR callback is in the critical path of the solver, so it should be fast.
+ */
+ Link* set_sharing_policy(SharingPolicy policy, const NonLinearResourceCb& cb = {});
SharingPolicy get_sharing_policy() const;
/** Setup the profile with states events (ON or OFF). The profile must contain boolean values. */
* current function to specify that a given host uses another level of bandwidth. This can be used to take the
* location of hosts into account, or even to model mobility in your SimGrid simulation.
*
- * Note that this function asserts that the link is actually a wifi link */
+ * Note that this function asserts that the link is actually a wifi link
+ *
+ * warning: in the case where a 0Mbps data rate should be used, set that rate only once during the
+ * experiment, and don't modify the bandwidth of that host later */
void set_host_wifi_rate(const s4u::Host* host, int level) const;
/** @brief Returns the current load (in bytes per second) */
/** @brief Check if the Link is shared (not a FATPIPE) */
bool is_shared() const;
+ /** Turns the link on. */
void turn_on();
+ /** Turns the link off. */
void turn_off();
+ /** Checks whether the link is on. */
bool is_on() const;
Link* seal();
- /* The signals */
- /** @brief Callback signal fired when a new Link is created */
+private:
+#ifndef DOXYGEN
static xbt::signal<void(Link&)> on_creation;
-
- /** @brief Callback signal fired when a Link is destroyed */
- static xbt::signal<void(Link const&)> on_destruction;
-
- /** @brief Callback signal fired when the state of a Link changes (when it is turned on or off) */
static xbt::signal<void(Link const&)> on_state_change;
-
- /** @brief Callback signal fired when the bandwidth of a Link changes */
static xbt::signal<void(Link const&)> on_bandwidth_change;
-
- /** @brief Callback signal fired when a communication starts */
- static xbt::signal<void(kernel::resource::NetworkAction&)> on_communicate;
-
- /** @brief Callback signal fired when a communication changes it state (ready/done/cancel) */
static xbt::signal<void(kernel::resource::NetworkAction&, kernel::resource::Action::State)>
on_communication_state_change;
+ static xbt::signal<void(Link const&)> on_destruction;
+#endif
+
+public:
+ /* The signals */
+ /** @brief Add a callback fired when a new Link is created */
+ static void on_creation_cb(const std::function<void(Link&)>& cb) { on_creation.connect(cb); }
+ /** @brief Add a callback fired when the state of a Link changes (when it is turned on or off) */
+ static void on_state_change_cb(const std::function<void(Link const&)>& cb) { on_state_change.connect(cb); }
+ /** @brief Add a callback fired when the bandwidth of a Link changes */
+ static void on_bandwidth_change_cb(const std::function<void(Link const&)>& cb) { on_bandwidth_change.connect(cb); }
+ /** @brief Add a callback fired when a communication changes it state (ready/done/cancel) */
+ static void on_communication_state_change_cb(
+ const std::function<void(kernel::resource::NetworkAction&, kernel::resource::Action::State)>& cb)
+ {
+ on_communication_state_change.connect(cb);
+ }
+ /** @brief Add a callback fired when a Link is destroyed */
+ static void on_destruction_cb(const std::function<void(Link const&)>& cb) { on_destruction.connect(cb); }
};
/**
*/
class XBT_PUBLIC SplitDuplexLink : public Link {
public:
- explicit SplitDuplexLink(kernel::resource::LinkImplIntf* pimpl) : Link(pimpl) {}
+ explicit SplitDuplexLink(kernel::resource::LinkImpl* pimpl) : Link(pimpl) {}
/** @brief Get the link direction up*/
Link* get_link_up() const;
/** @brief Get the link direction down */
/**
* @beginrst
- * Another encapsulation for using links in the :cpp:function:: NetZone::add_route
+ * Another encapsulation for using links in the :cpp:func:`NetZone::add_route`
*
* When adding a route with split-duplex links, you need to specify the direction of the link
* so SimGrid can know exactly which physical link to insert in the route.
*
- * For shared/fat-pipe links, use the Direction::NONE since they don't have
+ * For shared/fat-pipe links, use the :cpp:enumerator:`Direction::NONE` since they don't have
* the concept of UP/DOWN links.
* @endrst
*/
public:
enum class Direction { UP = 2, DOWN = 1, NONE = 0 };
- LinkInRoute(const Link* link) : link_(link) {}
+ explicit LinkInRoute(const Link* link) : link_(link) {}
LinkInRoute(const Link* link, Direction d) : link_(link), direction_(d) {}
/** @brief Get direction of this link in the route: UP or DOWN */
