8 <object id="TOC" data="graphical-toc.svg" type="image/svg+xml"></object>
10 window.onload=function() { // Wait for the SVG to be loaded before changing it
11 var elem=document.querySelector("#TOC").contentDocument.getElementById("ActorBox")
12 elem.style="opacity:0.93999999;fill:#ff0000;fill-opacity:0.1;stroke:#000000;stroke-width:0.35277778;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1";
18 The S4U interface (SimGrid for you) mixes the full power of SimGrid
19 with the full power of C++. This is the preferred interface to describe
20 abstract algorithms in the domains of Cloud, P2P, HPC, IoT, and similar
23 Since v3.20 (June 2018), S4U is the way to go for long-term
24 projects. It is feature complete, but may still evolve slightly in
25 future releases. It can already be used to do everything that can be
26 done in SimGrid, but you may have to adapt your code in future
27 releases. When this happens, compiling your code will produce
28 deprecation warnings for 4 releases (one year) before the removal of
30 If you want an API that will never ever evolve in the future, you
31 should use the :ref:`deprecated MSG API <MSG_doc>` instead.
36 A typical SimGrid simulation is composed of several |API_s4u_Actors|_, that
37 execute user-provided functions. The actors have to explicitly use the
38 S4U interface to express their :ref:`computation <API_s4u_Exec>`,
39 :ref:`communication <API_s4u_Comm>`, :ref:`disk usage <API_s4u_Io>`,
40 and other |API_s4u_Activities|_, so that they get reflected within the
41 simulator. These activities take place on resources such as |API_s4u_Hosts|_,
42 |API_s4u_Links|_, and |API_s4u_Disks|_. SimGrid predicts the time taken by each
43 activity and orchestrates the actors accordingly, waiting for the
44 completion of these activities.
47 When **communicating**, data is not directly sent to other actors but
48 posted onto a |API_s4u_Mailbox|_ that serves as a rendezvous point between
49 communicating actors. This means that you don't need to know who you
50 are talking to, you just put your communication `Put` request in a
51 mailbox, and it will be matched with a complementary `Get`
52 request. Alternatively, actors can interact through **classical
53 synchronization mechanisms** such as |API_s4u_Barrier|_, |API_s4u_Semaphore|_,
54 |API_s4u_Mutex|_, and |API_s4u_ConditionVariable|_.
56 Each actor is located on a simulated |API_s4u_Host|_. Each host is located
57 in a |API_s4u_NetZone|_, that knows the networking path between one
58 resource to another. Each NetZone is included in another one, forming
59 a tree of NetZones which root zone contains the whole platform. The
60 actors can also be located on a |API_s4U_VirtualMachine|_ that may
61 restrict the activities it contains to a limited amount of cores.
62 Virtual machines can also be migrated between hosts.
64 The :ref:`simgrid::s4u::this_actor <API_s4u_this_actor>` namespace
65 provides many helper functions to simplify the code of actors.
67 - **Simulation Elements**
69 - :ref:`class Actor <API_s4u_Actor>`:
70 Active entities executing your application.
71 - :ref:`class Engine <API_s4u_Engine>`
72 Simulation engine (singleton).
73 - :ref:`class Mailbox <API_s4u_Mailbox>`
74 Communication rendezvous, with which actors meet each other.
78 - :ref:`class Disk <API_s4u_Disk>`
79 Resource on which actors can write and read data.
80 - :ref:`class Host <API_s4u_Host>`:
81 Actor location, providing computational power.
82 - :ref:`class Link <API_s4u_Link>`
83 Interconnecting hosts.
84 - :ref:`class NetZone <API_s4u_NetZone>`:
85 Sub-region of the platform, containing resources (Hosts, Links, etc).
86 - :ref:`class VirtualMachine <API_s4u_VirtualMachine>`:
87 Execution containers that can be moved between Hosts.
89 - **Activities** (:ref:`class Activity <API_s4u_Activity>`):
90 The things that actors can do on resources
92 - :ref:`class Comm <API_s4u_Comm>`
93 Communication activity, started on Mailboxes and consuming links.
94 - :ref:`class Exec <API_s4u_Exec>`
95 Computation activity, started on Host and consuming CPU resources.
96 - :ref:`class Io <API_s4u_Io>`
97 I/O activity, started on and consuming disks.
99 - **Synchronization Objects**: Classical IPC that actors can use
101 - :ref:`class Barrier <API_s4u_Barrier>`
102 - :ref:`class ConditionVariable <API_s4u_ConditionVariable>`
103 - :ref:`class Mutex <API_s4u_Mutex>`
104 - :ref:`class Semaphore <API_s4u_Semaphore>`
107 .. |API_s4u_Actors| replace:: **Actors**
108 .. _API_s4u_Actors: #api-s4u-actor
110 .. |API_s4u_Activities| replace:: **Activities**
111 .. _API_s4u_Activities: #api-s4u-activity
113 .. |API_s4u_Hosts| replace:: **Hosts**
114 .. _API_s4u_Hosts: #api-s4u-host
116 .. |API_s4u_Links| replace:: **Links**
117 .. _API_s4u_Links: #api-s4u-link
119 .. |API_s4u_Disks| replace:: **Disks**
120 .. _API_s4u_Disks: #api-s4u-disk
122 .. |API_s4u_VirtualMachine| replace:: **VirtualMachines**
124 .. |API_s4u_Host| replace:: **Host**
126 .. |API_s4u_Mailbox| replace:: **Mailbox**
128 .. |API_s4u_Mailboxes| replace:: **Mailboxes**
129 .. _API_s4u_Mailboxes: #s4u-mailbox
131 .. |API_s4u_NetZone| replace:: **NetZone**
133 .. |API_s4u_Barrier| replace:: **Barrier**
135 .. |API_s4u_Semaphore| replace:: **Semaphore**
137 .. |API_s4u_ConditionVariable| replace:: **ConditionVariable**
139 .. |API_s4u_Mutex| replace:: **Mutex**
146 Activities represent the actions that consume a resource, such as a
147 :ref:`Comm <API_s4u_Comm>` that consumes the *transmitting power* of
148 :ref:`Link <API_s4u_Link>` resources, or an :ref:`Exec <API_s4u_Exec>`
149 that consumes the *computing power* of :ref:`Host <API_s4u_Host>` resources.
150 See also the :ref:`full API <API_s4u_Activity>` below.
152 =======================
153 Asynchronous Activities
154 =======================
156 Every activity can be either **blocking** or **asynchronous**. For
157 example, :cpp:func:`s4u::Mailbox::put() <simgrid::s4u::Mailbox::put>`
158 and :cpp:func:`s4u::Mailbox::get() <simgrid::s4u::Mailbox::get>`
159 create blocking communications: the actor is blocked until the
160 completion of that communication. Asynchronous communications do not
161 block the actor during their execution but progress on their own.
163 Once your asynchronous activity is started, you can test for its
164 completion using :cpp:func:`s4u::Activity::test() <simgrid::s4u::Activity::test>`.
165 This function returns ``true`` if the activity is completed already.
166 You can also use :cpp:func:`s4u::Activity::wait() <simgrid::s4u::Activity::wait>`
167 to block until the completion of the activity. To wait for at most a given amount of time,
168 use :cpp:func:`s4u::Activity::wait_for() <simgrid::s4u::Activity::wait_for>`.
169 Finally, to wait at most until a specified time limit, use
170 :cpp:func:`s4u::Activity::wait_until() <simgrid::s4u::Activity::wait_until>`.
172 Every kind of activity can be asynchronous:
174 - :ref:`s4u::CommPtr <API_s4u_Comm>` are created with
175 :cpp:func:`s4u::Mailbox::put_async() <simgrid::s4u::Mailbox::put_async>` and
176 :cpp:func:`s4u::Mailbox::get_async() <simgrid::s4u::Mailbox::get_async>`.
177 - :ref:`s4u::IoPtr <API_s4u_Io>` are created with
178 :cpp:func:`s4u::Disk::read_async() <simgrid::s4u::Disk::read_async>` and
179 :cpp:func:`s4u::Disk::write_async() <simgrid::s4u::Disk::write_async>`.
180 - :ref:`s4u::ExecPtr <API_s4u_Exec>` are created with
181 :cpp:func:`s4u::Host::exec_async() <simgrid::s4u::Host::exec_async>`.
182 - In the future, it will become possible to have asynchronous IPC
183 such as asynchronous mutex lock requests.
185 The following example shows how to have several concurrent
186 communications ongoing. First, you have to declare a vector in which
187 we will store the ongoing communications. It is also useful to have a
190 .. literalinclude:: ../../examples/cpp/comm-waitall/s4u-comm-waitall.cpp
192 :start-after: init-begin
193 :end-before: init-end
196 Then, you start all the communications that should occur concurrently with
197 :cpp:func:`s4u::Mailbox::put_async() <simgrid::s4u::Mailbox::put_async>`.
198 Finally, the actor waits for the completion of all of them at once
200 :cpp:func:`s4u::Comm::wait_all() <simgrid::s4u::Comm::wait_all>`.
202 .. literalinclude:: ../../examples/cpp/comm-waitall/s4u-comm-waitall.cpp
204 :start-after: put-begin
209 =====================
210 Activities Life cycle
211 =====================
213 Sometimes, you want to change the setting of an activity before it even starts.
215 .. todo:: write this section
222 Please also refer to the :ref:`API reference for s4u::Mailbox
229 |API_s4u_Mailboxes|_ are rendezvous points for network communications,
230 similar to URLs on which you could post and retrieve data. Actually,
231 the mailboxes are not involved in the communication once it starts,
232 but only to find the contact with which you want to communicate.
234 They are similar to many common things: The phone number, which allows
235 the caller to find the receiver. The Twitter hashtag, which helps
236 senders and receivers to find each other. In TCP, the pair
237 ``{host name, host port}`` to which you can connect to find your peer.
238 In HTTP, URLs through which the clients can connect to the servers.
239 In ZeroMQ, the queues are used to match senders and receivers.
241 One big difference with most of these systems is that no actor is the
242 exclusive owner of a mailbox, neither in sending nor in receiving.
243 Many actors can send into and/or receive from the same mailbox. TCP
244 socket ports for example are shared on the sender side but exclusive
245 on the receiver side (only one process can receive from a given socket
246 at a given point of time).
248 A big difference with TCP sockets or MPI communications is that
249 communications do not start right away after a
250 :cpp:func:`Mailbox::put() <simgrid::s4u::Mailbox::put>`, but wait
251 for the corresponding :cpp:func:`Mailbox::get() <simgrid::s4u::Mailbox::get>`.
252 You can change this by :ref:`declaring a receiving actor <s4u_receiving_actor>`.
254 A big difference with Twitter hashtags is that SimGrid does not
255 offer easy support to broadcast a given message to many
256 receivers. So that would be like a Twitter tag where each message
257 is consumed by the first receiver.
259 A big difference with the ZeroMQ queues is that you cannot filter
260 on the data you want to get from the mailbox. To model such settings
261 in SimGrid, you'd have one mailbox per potential topic, and subscribe
262 to each topic individually with a
263 :cpp:func:`get_async() <simgrid::s4u::Mailbox::get_async>` on each mailbox.
264 Then, use :cpp:func:`Comm::wait_any() <simgrid::s4u::Comm::wait_any>`
265 to get the first message on any of the mailboxes you are subscribed to.
267 The mailboxes are not located on the network, and you can access
268 them without any latency. The network delays are only related to the
269 location of the sender and receiver once the match between them is
270 done on the mailbox. This is just like the phone number that you
271 can use locally, and the geographical distance only comes into play
272 once you start the communication by dialing this number.
274 =====================
275 How to use Mailboxes?
276 =====================
278 You can retrieve any existing mailbox from its name (which is a
279 unique string, just like a Twitter tag). This results in a
280 versatile tool that can be used to build many different
283 To model classical socket communications, use "hostname:port" as
284 mailbox names, and make sure that only one actor reads into a given
285 mailbox. This does not make it easy to build a perfectly realistic
286 model of the TCP sockets, but in most cases, this system is too
287 cumbersome for your simulations anyway. You probably want something
288 simpler, that turns out to be easy to build with the mailboxes.
290 Many SimGrid examples use a sort of yellow page system where the
291 mailbox names are the name of the service (such as "worker",
292 "master", or "reducer"). That way, you don't have to know where your
293 peer is located to contact it. You don't even need its name. Its
294 function is enough for that. This also gives you some sort of load
295 balancing for free if more than one actor pulls from the mailbox:
296 the first actor that can deal with the request will handle it.
298 =========================================
299 How are put() and get() requests matched?
300 =========================================
302 The matching algorithm simple: first come, first serve. When a new
303 send arrives, it matches the oldest enqueued receive. If no receive is
304 currently enqueued, then the incoming send is enqueued. As you can
305 see, the mailbox cannot contain both send and receive requests: all
306 enqueued requests must be of the same sort.
308 .. _s4u_receiving_actor:
310 ===========================
311 Declaring a Receiving Actor
312 ===========================
314 The last twist is that by default in the simulator, the data starts
315 to be exchanged only when both the sender and the receiver are
316 announced (it waits until both :cpp:func:`put() <simgrid::s4u::Mailbox::put()>`
317 and :cpp:func:`get() <simgrid::s4u::Mailbox::get()>` are posted).
318 In TCP, since you establish connections beforehand, the data starts to
319 flow as soon as the sender posts it, even if the receiver did not post
320 its :cpp:func:`put() <simgrid::s4u::Mailbox::put()>` yet.
322 To model this in SimGrid, you can declare a specific receiver to a
323 given mailbox (with the function
324 :cpp:func:`set_receiver() <simgrid::s4u::Mailbox::set_receiver()>`).
325 That way, any :cpp:func:`put() <simgrid::s4u::Mailbox::put()>`
326 posted to that mailbox will start as soon as possible, and the data
327 will already be there on the receiver host when the receiver actor
328 posts its :cpp:func:`get() <simgrid::s4u::Mailbox::get()>`
330 Note that being permanent receivers of a mailbox prevents actors to be
331 garbage-collected. If your simulation creates many short-lived actors
332 that are marked as permanent receiver, you should call
333 ``mailbox->set_receiver(nullptr)`` by the end of the actors so that their
334 memory gets properly reclaimed. This call should be at the end of the
335 actor's function, not in an on_exit callback.
337 ===============================
338 Communicating without Mailboxes
339 ===============================
341 Sometimes you don't want to simulate communications between actors as
342 allowed by mailboxes, but you want to create a direct communication
343 between two arbitrary hosts. This can arise when you write a
344 high-level model of a centralized scheduler, or when you model direct
345 communications such as one-sided communications in MPI or remote
346 memory direct access in PGAS.
348 For that, :cpp:func:`Comm::sendto() <simgrid::s4u::Comm::sendto()>`
349 simulates a direct communication between the two specified hosts. No
350 mailbox is used, and there is no rendezvous between actors. You can
351 freely mix such direct communications and rendezvous-based
352 communications. Alternatively, :cpp:func:`Comm::sendto_init()
353 <simgrid::s4u::Comm::sendto_init()>` and
354 :cpp:func:`Comm::sendto_async() <simgrid::s4u::Comm::sendto_async()>`
355 create asynchronous direct communications.
362 For sake of simplicity, we use `RAII
363 <https://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization>`_
364 for many classes in S4U. This is an idiom where resources are automatically
365 managed through the context. Provided that you never manipulate
366 objects of type Foo directly but always FooPtr references (which are
367 defined as `boost::intrusive_ptr
368 <http://www.boost.org/doc/libs/1_61_0/libs/smart_ptr/intrusive_ptr.html>`_
369 <Foo>), you will never have to explicitly release the resource that
370 you use nor to free the memory of unused objects.
371 Here is a little example:
377 simgrid::s4u::MutexPtr mutex = simgrid::s4u::Mutex::create(); // Too bad we cannot use `new`
379 mutex->lock(); // use the mutex as a simple reference
383 } // The mutex gets automatically freed because the only existing reference gets out of scope
385 Note that Mailboxes, Hosts, and Links are not handled through smart
386 pointers (yet?). This means that it is currently impossible to destroy a
387 mailbox or a link. You can still destroy a host (but probably
388 shouldn't), using :cpp:func:`simgrid::s4u::Host::destroy`.
392 .. include:: ../../examples/README.rst
397 .. _API_s4u_simulation_object:
409 .. doxygenclass:: simgrid::s4u::Actor
411 .. doxygentypedef:: aid_t
422 #include <simgrid/s4u/Actor.hpp>
424 .. doxygentypedef:: ActorPtr
426 .. group-tab:: Python
430 from simgrid import Actor
432 .. autoclass:: simgrid.Actor
438 #include <simgrid/actor.h>
440 .. doxygentypedef:: sg_actor_t
441 .. doxygentypedef:: const_sg_actor_t
442 .. doxygenfunction:: sg_actor_ref
443 .. doxygenfunction:: sg_actor_unref
453 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, const std::function< void()> &code)
454 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, F code)
455 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, F code, Args... args)
456 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, const std::string &function, std::vector< std::string > args)
458 .. doxygenfunction:: simgrid::s4u::Actor::init(const std::string &name, s4u::Host *host)
459 .. doxygenfunction:: simgrid::s4u::Actor::start(const std::function< void()> &code)
460 .. doxygenfunction:: simgrid::s4u::Actor::set_stacksize
462 .. group-tab:: Python
464 .. automethod:: simgrid.Actor.create
468 .. doxygenfunction:: sg_actor_create(const char *name, sg_host_t host, xbt_main_func_t code, int argc, char *const *argv)
469 .. doxygenfunction:: sg_actor_init(const char *name, sg_host_t host)
470 .. doxygenfunction:: sg_actor_start(sg_actor_t actor, xbt_main_func_t code, int argc, char *const *argv)
471 .. doxygenfunction:: sg_actor_set_stacksize
473 .. doxygenfunction:: sg_actor_attach(const char *name, void *data, sg_host_t host, xbt_dict_t properties)
474 .. doxygenfunction:: sg_actor_detach()
483 .. doxygenfunction:: simgrid::s4u::Actor::by_pid(aid_t pid)
484 .. doxygenfunction:: simgrid::s4u::Actor::self()
486 .. group-tab:: Python
488 .. automethod:: simgrid.Actor.by_pid
489 .. automethod:: simgrid.Actor.self
493 .. doxygenfunction:: sg_actor_by_pid(aid_t pid)
494 .. doxygenfunction:: sg_actor_self()
503 .. doxygenfunction:: simgrid::s4u::Actor::get_cname
504 .. doxygenfunction:: simgrid::s4u::Actor::get_name
505 .. doxygenfunction:: simgrid::s4u::Actor::get_pid
506 .. doxygenfunction:: simgrid::s4u::Actor::get_ppid
507 .. doxygenfunction:: simgrid::s4u::Actor::get_properties() const
508 .. doxygenfunction:: simgrid::s4u::Actor::get_property(const std::string &key) const
509 .. doxygenfunction:: simgrid::s4u::Actor::set_property(const std::string &key, const std::string &value)
511 .. doxygenfunction:: simgrid::s4u::Actor::get_host
512 .. doxygenfunction:: simgrid::s4u::Actor::set_host
514 .. doxygenfunction:: simgrid::s4u::Actor::get_refcount
515 .. doxygenfunction:: simgrid::s4u::Actor::get_impl
517 .. group-tab:: Python
519 .. autoattribute:: simgrid.Actor.name
520 .. autoattribute:: simgrid.Actor.host
521 .. autoattribute:: simgrid.Actor.pid
522 .. autoattribute:: simgrid.Actor.ppid
526 .. doxygenfunction:: sg_actor_get_name(const_sg_actor_t actor)
527 .. doxygenfunction:: sg_actor_get_pid(const_sg_actor_t actor)
528 .. doxygenfunction:: sg_actor_get_ppid(const_sg_actor_t actor)
529 .. doxygenfunction:: sg_actor_get_properties(const_sg_actor_t actor)
530 .. doxygenfunction:: sg_actor_get_property_value(const_sg_actor_t actor, const char *name)
532 .. doxygenfunction:: sg_actor_get_host(const_sg_actor_t actor)
533 .. doxygenfunction:: sg_actor_set_host(sg_actor_t actor, sg_host_t host)
535 .. doxygenfunction:: sg_actor_get_data(const_sg_actor_t actor)
536 .. doxygenfunction:: sg_actor_set_data(sg_actor_t actor, void *userdata)
538 Suspending and resuming actors
539 ------------------------------
545 .. doxygenfunction:: simgrid::s4u::Actor::suspend()
546 .. doxygenfunction:: simgrid::s4u::Actor::resume()
547 .. doxygenfunction:: simgrid::s4u::Actor::is_suspended
549 .. group-tab:: Python
551 .. automethod:: simgrid.Actor.resume
552 .. automethod:: simgrid.Actor.suspend
553 .. automethod:: simgrid.Actor.is_suspended
557 .. doxygenfunction:: sg_actor_suspend(sg_actor_t actor)
558 .. doxygenfunction:: sg_actor_resume(sg_actor_t actor)
559 .. doxygenfunction:: sg_actor_is_suspended(const_sg_actor_t actor)
561 Specifying when actors should terminate
562 ---------------------------------------
568 .. doxygenfunction:: simgrid::s4u::Actor::kill()
569 .. doxygenfunction:: simgrid::s4u::Actor::kill_all()
570 .. doxygenfunction:: simgrid::s4u::Actor::set_kill_time(double time)
571 .. doxygenfunction:: simgrid::s4u::Actor::get_kill_time
573 .. doxygenfunction:: simgrid::s4u::Actor::restart()
574 .. doxygenfunction:: simgrid::s4u::Actor::daemonize()
575 .. doxygenfunction:: simgrid::s4u::Actor::is_daemon
577 .. group-tab:: Python
579 .. automethod:: simgrid.Actor.kill
580 .. automethod:: simgrid.Actor.kill_all
582 .. automethod:: simgrid.Actor.daemonize
583 .. automethod:: simgrid.Actor.is_daemon
587 .. doxygenfunction:: sg_actor_kill(sg_actor_t actor)
588 .. doxygenfunction:: sg_actor_kill_all()
589 .. doxygenfunction:: sg_actor_set_kill_time(sg_actor_t actor, double kill_time)
591 .. doxygenfunction:: sg_actor_restart(sg_actor_t actor)
592 .. doxygenfunction:: sg_actor_daemonize(sg_actor_t actor)
593 .. doxygenfunction:: sg_actor_is_daemon
595 .. _API_s4u_Actor_end:
597 Reacting to the end of actors
598 -----------------------------
604 .. doxygenfunction:: simgrid::s4u::Actor::on_exit
605 .. doxygenfunction:: simgrid::s4u::Actor::join() const
606 .. doxygenfunction:: simgrid::s4u::Actor::join(double timeout) const
607 .. doxygenfunction:: simgrid::s4u::Actor::set_auto_restart(bool autorestart)
609 .. group-tab:: Python
611 .. automethod:: simgrid.Actor.join
615 .. doxygenfunction:: sg_actor_on_exit
616 .. doxygenfunction:: sg_actor_join(const_sg_actor_t actor, double timeout)
617 .. doxygenfunction:: sg_actor_set_auto_restart(sg_actor_t actor, int auto_restart)
626 .. doxygenvariable:: simgrid::s4u::Actor::on_creation
627 .. doxygenvariable:: simgrid::s4u::Actor::on_suspend
628 .. doxygenvariable:: simgrid::s4u::Actor::on_host_change
629 .. doxygenvariable:: simgrid::s4u::Actor::on_resume
630 .. doxygenvariable:: simgrid::s4u::Actor::on_sleep
631 .. doxygenvariable:: simgrid::s4u::Actor::on_wake_up
632 .. doxygenvariable:: simgrid::s4u::Actor::on_termination
633 .. doxygenvariable:: simgrid::s4u::Actor::on_destruction
635 .. _API_s4u_this_actor:
641 These functions can be used in your user code to interact with the actor
642 currently running (the one retrieved with :cpp:func:`simgrid::s4u::Actor::self`).
643 Using these functions can greatly improve the code readability.
652 .. doxygenfunction:: simgrid::s4u::this_actor::get_cname()
653 .. doxygenfunction:: simgrid::s4u::this_actor::get_name()
654 .. doxygenfunction:: simgrid::s4u::this_actor::get_pid()
655 .. doxygenfunction:: simgrid::s4u::this_actor::get_ppid()
656 .. doxygenfunction:: simgrid::s4u::this_actor::is_maestro()
658 .. doxygenfunction:: simgrid::s4u::this_actor::get_host()
659 .. doxygenfunction:: simgrid::s4u::this_actor::set_host(Host *new_host)
661 .. group-tab:: Python
663 .. autofunction:: simgrid.this_actor.get_host
664 .. autofunction:: simgrid.this_actor.set_host
668 .. doxygenfunction:: sg_actor_self_get_data()
669 .. doxygenfunction:: sg_actor_self_set_data(void *data)
670 .. doxygenfunction:: sg_actor_self_get_name()
671 .. doxygenfunction:: sg_actor_self_get_pid()
672 .. doxygenfunction:: sg_actor_self_get_ppid()
673 .. doxygenfunction:: sg_host_self()
674 .. doxygenfunction:: sg_host_self_get_name()
676 Suspending and resuming
677 -----------------------
683 .. doxygenfunction:: simgrid::s4u::this_actor::suspend()
684 .. doxygenfunction:: simgrid::s4u::this_actor::yield()
686 .. group-tab:: Python
688 .. autofunction:: simgrid.this_actor.suspend
689 .. autofunction:: simgrid.this_actor.yield_
693 .. doxygenfunction:: sg_actor_yield()
700 .. group-tab:: Python
702 .. autofunction:: simgrid.this_actor.info
703 .. autofunction:: simgrid.this_actor.error
712 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_for(double duration)
713 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_for(std::chrono::duration< Rep, Period > duration)
714 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_until(const SimulationTimePoint< Duration > &wakeup_time)
715 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_until(double wakeup_time)
717 .. group-tab:: Python
719 .. autofunction:: simgrid.this_actor.sleep_for
720 .. autofunction:: simgrid.this_actor.sleep_until
724 .. doxygenfunction:: sg_actor_sleep_for(double duration)
726 Simulating executions
727 ---------------------
729 Simulate the execution of some code on this actor. You can either simulate
730 parallel or sequential code and you can either block upon the termination of
731 the execution, or start an asynchronous activity.
737 .. doxygenfunction:: simgrid::s4u::this_actor::exec_async
738 .. doxygenfunction:: simgrid::s4u::this_actor::exec_init(const std::vector< s4u::Host * > &hosts, const std::vector< double > &flops_amounts, const std::vector< double > &bytes_amounts)
739 .. doxygenfunction:: simgrid::s4u::this_actor::exec_init(double flops_amounts)
740 .. doxygenfunction:: simgrid::s4u::this_actor::execute(double flop)
741 .. doxygenfunction:: simgrid::s4u::this_actor::execute(double flop, double priority)
742 .. doxygenfunction:: simgrid::s4u::this_actor::parallel_execute(const std::vector< s4u::Host * > &hosts, const std::vector< double > &flops_amounts, const std::vector< double > &bytes_amounts)
744 .. group-tab:: Python
746 .. autofunction:: simgrid.this_actor.exec_init
747 .. autofunction:: simgrid.this_actor.execute
751 .. doxygenfunction:: sg_actor_execute(double flops)
752 .. doxygenfunction:: sg_actor_execute_with_priority(double flops, double priority)
753 .. doxygenfunction:: sg_actor_exec_init(double computation_amount)
754 .. doxygenfunction:: sg_actor_exec_async(double computation_amount)
755 .. doxygenfunction:: sg_actor_parallel_exec_init(int host_nb, const sg_host_t* host_list, double* flops_amount, double* bytes_amount);
764 .. doxygenfunction:: simgrid::s4u::this_actor::exit()
765 .. doxygenfunction:: simgrid::s4u::this_actor::on_exit(const std::function< void(bool)> &fun)
767 .. group-tab:: Python
769 .. autofunction:: simgrid.this_actor.exit
770 .. autofunction:: simgrid.this_actor.on_exit
774 See also :cpp:func:`sg_actor_on_exit`.
776 .. doxygenfunction:: sg_actor_exit
784 .. doxygenclass:: simgrid::s4u::Engine
793 .. doxygenfunction:: simgrid::s4u::Engine::Engine(int *argc, char **argv)
794 .. doxygenfunction:: simgrid::s4u::Engine::is_initialized()
795 .. doxygenfunction:: simgrid::s4u::Engine::shutdown()
796 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &str)
797 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, bool value)
798 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, double value)
799 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, int value)
800 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, const std::string &value)
802 .. doxygenfunction:: simgrid::s4u::Engine::load_deployment
803 .. doxygenfunction:: simgrid::s4u::Engine::load_platform
804 .. doxygenfunction:: simgrid::s4u::Engine::register_actor(const std::string &name)
805 .. doxygenfunction:: simgrid::s4u::Engine::register_actor(const std::string &name, F code)
806 .. doxygenfunction:: simgrid::s4u::Engine::register_default(const std::function< void(int, char **)> &code)
807 .. doxygenfunction:: simgrid::s4u::Engine::register_default(const kernel::actor::ActorCodeFactory &factory)
809 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const std::function< void(int, char **)> &code)
810 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const std::function< void(std::vector< std::string >)> &code)
811 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const kernel::actor::ActorCodeFactory &factory)
813 .. group-tab:: Python
815 .. automethod:: simgrid.Engine.load_deployment
816 .. automethod:: simgrid.Engine.load_platform
817 .. automethod:: simgrid.Engine.register_actor
821 .. doxygenfunction:: simgrid_init
823 .. doxygenfunction:: simgrid_load_deployment
824 .. doxygenfunction:: simgrid_load_platform
825 .. doxygenfunction:: simgrid_register_default
826 .. doxygenfunction:: simgrid_register_function
835 .. doxygenfunction:: simgrid::s4u::Engine::get_clock()
836 .. doxygenfunction:: simgrid::s4u::Engine::run
838 .. group-tab:: Python
840 .. automethod:: simgrid.Engine.get_clock
841 .. automethod:: simgrid.Engine.run
845 .. doxygenfunction:: simgrid_get_clock
846 .. doxygenfunction:: simgrid_run
855 .. doxygenfunction:: simgrid::s4u::Engine::get_actor_count
856 .. doxygenfunction:: simgrid::s4u::Engine::get_all_actors
857 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_actors
861 .. doxygenfunction:: simgrid_get_actor_count()
870 .. doxygenfunction:: simgrid::s4u::Engine::get_all_hosts
871 .. doxygenfunction:: simgrid::s4u::Engine::get_host_count
872 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_hosts
873 .. doxygenfunction:: simgrid::s4u::Engine::host_by_name
874 .. doxygenfunction:: simgrid::s4u::Engine::host_by_name_or_null
876 .. group-tab:: Python
878 .. automethod:: simgrid.Engine.get_all_hosts
882 See also :cpp:func:`sg_host_list` and :cpp:func:`sg_host_count`.
891 .. doxygenfunction:: simgrid::s4u::Engine::get_all_links
892 .. doxygenfunction:: simgrid::s4u::Engine::get_link_count
893 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_links
894 .. doxygenfunction:: simgrid::s4u::Engine::link_by_name
895 .. doxygenfunction:: simgrid::s4u::Engine::link_by_name_or_null
897 Interacting with the routing
898 ----------------------------
904 .. doxygenfunction:: simgrid::s4u::Engine::get_all_netpoints
905 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_netzones
906 .. doxygenfunction:: simgrid::s4u::Engine::get_instance()
907 .. doxygenfunction:: simgrid::s4u::Engine::get_netzone_root
908 .. doxygenfunction:: simgrid::s4u::Engine::netpoint_by_name_or_null
909 .. doxygenfunction:: simgrid::s4u::Engine::netzone_by_name_or_null
910 .. doxygenfunction:: simgrid::s4u::Engine::set_netzone_root(const NetZone *netzone)
919 .. doxygenvariable:: simgrid::s4u::Engine::on_deadlock
920 .. doxygenvariable:: simgrid::s4u::Engine::on_platform_created
921 .. doxygenvariable:: simgrid::s4u::Engine::on_platform_creation
922 .. doxygenvariable:: simgrid::s4u::Engine::on_simulation_end
923 .. doxygenvariable:: simgrid::s4u::Engine::on_time_advance
931 .. doxygenclass:: simgrid::s4u::Mailbox
933 Please also refer to the :ref:`full doc on s4u::Mailbox <s4u_mailbox>`.
944 #include <simgrid/s4u/Mailbox.hpp>
946 Note that there is no MailboxPtr type and that you cannot use the RAII
947 idiom on mailboxes because they are internal objects to the simulation
948 engine. Once created, there is no way to destroy a mailbox before the end
951 .. doxygenfunction:: simgrid::s4u::Mailbox::by_name(const std::string &name)
953 .. group-tab:: Python
957 #include <simgrid/mailbox.h>
959 .. autoclass:: simgrid.Mailbox
961 .. automethod:: simgrid.Mailbox.by_name
967 #include <simgrid/s4u/mailbox.h>
969 .. doxygentypedef:: sg_mailbox_t
970 .. doxygentypedef:: const_sg_mailbox_t
972 .. doxygenfunction:: sg_mailbox_by_name(const char *alias)
981 .. doxygenfunction:: simgrid::s4u::Mailbox::get_cname
982 .. doxygenfunction:: simgrid::s4u::Mailbox::get_name
984 .. group-tab:: Python
986 .. autoattribute:: simgrid.Mailbox.name
995 .. doxygenfunction:: simgrid::s4u::Mailbox::put(void *payload, uint64_t simulated_size_in_bytes)
996 .. doxygenfunction:: simgrid::s4u::Mailbox::put(void *payload, uint64_t simulated_size_in_bytes, double timeout)
997 .. doxygenfunction:: simgrid::s4u::Mailbox::put_async(void *data, uint64_t simulated_size_in_bytes)
998 .. doxygenfunction:: simgrid::s4u::Mailbox::put_init()
999 .. doxygenfunction:: simgrid::s4u::Mailbox::put_init(void *data, uint64_t simulated_size_in_bytes)
1001 .. group-tab:: Python
1003 .. automethod:: simgrid.Mailbox.put
1004 .. automethod:: simgrid.Mailbox.put_async
1008 .. doxygenfunction:: sg_mailbox_put(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1009 .. doxygenfunction:: sg_mailbox_put_init(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1010 .. doxygenfunction:: sg_mailbox_put_async(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1020 .. doxygenfunction:: simgrid::s4u::Mailbox::empty
1021 .. doxygenfunction:: simgrid::s4u::Mailbox::front
1022 .. doxygenfunction:: simgrid::s4u::Mailbox::get()
1023 .. doxygenfunction:: simgrid::s4u::Mailbox::get(double timeout)
1024 .. doxygenfunction:: simgrid::s4u::Mailbox::get_async(T **data)
1025 .. doxygenfunction:: simgrid::s4u::Mailbox::get_init()
1026 .. doxygenfunction:: simgrid::s4u::Mailbox::iprobe(int type, bool(*match_fun)(void *, void *, kernel::activity::CommImpl *), void *data)
1027 .. doxygenfunction:: simgrid::s4u::Mailbox::listen
1028 .. doxygenfunction:: simgrid::s4u::Mailbox::ready
1030 .. group-tab:: Python
1032 .. automethod:: simgrid.Mailbox.get
1036 .. doxygenfunction:: sg_mailbox_get(sg_mailbox_t mailbox)
1037 .. doxygenfunction:: sg_mailbox_get_async(sg_mailbox_t mailbox, void **data)
1038 .. doxygenfunction:: sg_mailbox_get_name(const_sg_mailbox_t mailbox)
1039 .. doxygenfunction:: sg_mailbox_listen(const char *alias)
1044 See :ref:`s4u_receiving_actor`.
1050 .. doxygenfunction:: simgrid::s4u::Mailbox::get_receiver
1051 .. doxygenfunction:: simgrid::s4u::Mailbox::set_receiver(ActorPtr actor)
1055 .. doxygenfunction:: sg_mailbox_set_receiver(const char *alias)
1057 .. _API_s4u_Resource:
1069 .. doxygenclass:: simgrid::s4u::Disk
1080 #include <simgrid/s4u/Disk.hpp>
1082 Note that there is no DiskPtr type and that you cannot use the RAII
1083 idiom on disks because SimGrid does not allow (yet) to create nor
1084 destroy resources once the simulation is started.
1094 .. doxygenfunction:: simgrid::s4u::Disk::get_cname() const
1095 .. doxygenfunction:: simgrid::s4u::Disk::get_host() const
1096 .. doxygenfunction:: simgrid::s4u::Disk::get_name() const
1097 .. doxygenfunction:: simgrid::s4u::Disk::get_properties() const
1098 .. doxygenfunction:: simgrid::s4u::Disk::get_property(const std::string &key) const
1099 .. doxygenfunction:: simgrid::s4u::Disk::get_read_bandwidth() const
1100 .. doxygenfunction:: simgrid::s4u::Disk::get_write_bandwidth() const
1101 .. doxygenfunction:: simgrid::s4u::Disk::set_property(const std::string &, const std::string &value)
1110 .. doxygenfunction:: simgrid::s4u::Disk::io_init(sg_size_t size, s4u::Io::OpType type) const
1111 .. doxygenfunction:: simgrid::s4u::Disk::read(sg_size_t size) const
1112 .. doxygenfunction:: simgrid::s4u::Disk::read_async(sg_size_t size) const
1113 .. doxygenfunction:: simgrid::s4u::Disk::write(sg_size_t size) const
1114 .. doxygenfunction:: simgrid::s4u::Disk::write_async(sg_size_t size) const
1123 .. doxygenvariable:: simgrid::s4u::Disk::on_creation
1124 .. doxygenvariable:: simgrid::s4u::Disk::on_destruction
1125 .. doxygenvariable:: simgrid::s4u::Disk::on_state_change
1134 .. doxygenclass:: simgrid::s4u::Host
1145 #include <simgrid/s4u/Host.hpp>
1147 Note that there is no HostPtr type, and that you cannot use the RAII
1148 idiom on hosts because SimGrid does not allow (yet) to create nor
1149 destroy resources once the simulation is started.
1151 .. doxygenfunction:: simgrid::s4u::Host::destroy()
1153 .. group-tab:: Python
1157 from simgrid import Host
1163 #include <simgrid/host.h>
1165 .. doxygentypedef:: sg_host_t
1166 .. cpp:type:: const s4u_Host* const_sg_host_t
1168 Pointer to a constant host object.
1177 See also :cpp:func:`simgrid::s4u::Engine::get_all_hosts`.
1179 .. doxygenfunction:: simgrid::s4u::Host::by_name(const std::string &name)
1180 .. doxygenfunction:: simgrid::s4u::Host::by_name_or_null(const std::string &name)
1181 .. doxygenfunction:: simgrid::s4u::Host::current()
1183 .. group-tab:: Python
1185 See also :py:func:`simgrid.Engine.get_all_hosts`.
1187 .. automethod:: simgrid.Host.by_name
1188 .. automethod:: simgrid.Host.current
1192 .. doxygenfunction:: sg_host_by_name(const char *name)
1193 .. doxygenfunction:: sg_host_count()
1194 .. doxygenfunction:: sg_host_list()
1195 .. doxygenfunction:: sg_hosts_as_dynar()
1204 .. doxygenfunction:: simgrid::s4u::Host::get_cname() const
1205 .. doxygenfunction:: simgrid::s4u::Host::get_core_count() const
1206 .. doxygenfunction:: simgrid::s4u::Host::get_name() const
1207 .. doxygenfunction:: simgrid::s4u::Host::get_available_speed() const
1208 .. doxygenfunction:: simgrid::s4u::Host::get_load() const
1209 .. doxygenfunction:: simgrid::s4u::Host::get_speed() const
1211 .. group-tab:: Python
1213 .. autoattribute:: simgrid.Host.name
1214 .. autoattribute:: simgrid.Host.load
1215 .. autoattribute:: simgrid.Host.pstate
1216 .. autoattribute:: simgrid.Host.speed
1220 .. doxygenfunction:: sg_host_core_count(const_sg_host_t host)
1221 .. doxygenfunction:: sg_host_dump(const_sg_host_t ws)
1222 .. doxygenfunction:: sg_host_get_name(const_sg_host_t host)
1223 .. doxygenfunction:: sg_host_get_load(const_sg_host_t host)
1224 .. doxygenfunction:: sg_host_get_speed(const_sg_host_t host)
1226 User data and properties
1227 ------------------------
1233 .. doxygenfunction:: simgrid::s4u::Host::get_properties() const
1234 .. doxygenfunction:: simgrid::s4u::Host::get_property(const std::string &key) const
1235 .. doxygenfunction:: simgrid::s4u::Host::set_properties(const std::unordered_map< std::string, std::string > &properties)
1236 .. doxygenfunction:: simgrid::s4u::Host::set_property(const std::string &key, const std::string &value)
1240 .. doxygenfunction:: sg_host_set_property_value(sg_host_t host, const char *name, const char *value)
1241 .. doxygenfunction:: sg_host_get_properties(const_sg_host_t host)
1242 .. doxygenfunction:: sg_host_get_property_value(const_sg_host_t host, const char *name)
1243 .. doxygenfunction:: sg_host_extension_create(void(*deleter)(void *))
1244 .. doxygenfunction:: sg_host_extension_get(const_sg_host_t host, size_t rank)
1246 Retrieving components
1247 ---------------------
1253 .. doxygenfunction:: simgrid::s4u::Host::add_disk(const Disk *disk)
1254 .. doxygenfunction:: simgrid::s4u::Host::get_actor_count() const
1255 .. doxygenfunction:: simgrid::s4u::Host::get_all_actors() const
1256 .. doxygenfunction:: simgrid::s4u::Host::get_disks() const
1257 .. doxygenfunction:: simgrid::s4u::Host::remove_disk(const std::string &disk_name)
1261 .. doxygenfunction:: sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
1270 .. doxygenfunction:: simgrid::s4u::Host::is_on() const
1271 .. doxygenfunction:: simgrid::s4u::Host::turn_off()
1272 .. doxygenfunction:: simgrid::s4u::Host::turn_on()
1276 .. doxygenfunction:: sg_host_is_on(const_sg_host_t host)
1277 .. doxygenfunction:: sg_host_turn_off(sg_host_t host)
1278 .. doxygenfunction:: sg_host_turn_on(sg_host_t host)
1287 .. doxygenfunction:: simgrid::s4u::Host::get_pstate() const
1288 .. doxygenfunction:: simgrid::s4u::Host::get_pstate_count() const
1289 .. doxygenfunction:: simgrid::s4u::Host::get_pstate_speed(int pstate_index) const
1290 .. doxygenfunction:: simgrid::s4u::Host::set_pstate(int pstate_index)
1291 .. doxygenfunction:: simgrid::s4u::Host::set_speed_profile(kernel::profile::Profile *p)
1292 .. doxygenfunction:: simgrid::s4u::Host::set_state_profile(kernel::profile::Profile *p)
1294 .. group-tab:: Python
1296 .. automethod:: simgrid.Host.get_pstate_count
1297 .. automethod:: simgrid.Host.get_pstate_speed
1301 .. doxygenfunction:: sg_host_get_available_speed(const_sg_host_t host)
1302 .. doxygenfunction:: sg_host_get_nb_pstates(const_sg_host_t host)
1303 .. doxygenfunction:: sg_host_get_pstate(const_sg_host_t host)
1304 .. doxygenfunction:: sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
1305 .. doxygenfunction:: sg_host_set_pstate(sg_host_t host, int pstate)
1314 .. doxygenfunction:: simgrid::s4u::Host::exec_async
1315 .. doxygenfunction:: simgrid::s4u::Host::execute(double flops) const
1316 .. doxygenfunction:: simgrid::s4u::Host::execute(double flops, double priority) const
1318 Platform and routing
1319 --------------------
1321 You can also start direct communications between two arbitrary hosts
1322 using :cpp:func:`Comm::sendto() <simgrid::s4u::Comm::sendto()>`.
1328 .. doxygenfunction:: simgrid::s4u::Host::get_englobing_zone() const
1329 .. doxygenfunction:: simgrid::s4u::Host::get_netpoint() const
1330 .. doxygenfunction:: simgrid::s4u::Host::route_to(const Host *dest, std::vector< Link * > &links, double *latency) const
1331 .. doxygenfunction:: simgrid::s4u::Host::route_to(const Host *dest, std::vector< kernel::resource::LinkImpl * > &links, double *latency) const
1335 .. doxygenfunction:: sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
1336 .. doxygenfunction:: sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
1337 .. doxygenfunction:: sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
1338 .. doxygenfunction:: sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
1347 .. doxygenvariable:: simgrid::s4u::Host::on_creation
1348 .. doxygenvariable:: simgrid::s4u::Host::on_destruction
1349 .. doxygenvariable:: simgrid::s4u::Host::on_speed_change
1350 .. doxygenvariable:: simgrid::s4u::Host::on_state_change
1358 .. doxygenclass:: simgrid::s4u::Link
1359 .. doxygenclass:: simgrid::s4u::SplitDuplexLink
1360 .. doxygenclass:: simgrid::s4u::LinkInRoute
1371 #include <simgrid/s4u/Link.hpp>
1373 Note that there is no LinkPtr type and that you cannot use the RAII
1374 idiom on hosts because SimGrid does not allow (yet) to create nor
1375 destroy resources once the simulation is started.
1377 .. group-tab:: Python
1381 from simgrid import Link
1387 #include <simgrid/link.h>
1389 .. doxygentypedef:: sg_link_t
1390 .. cpp:type:: const s4u_Link* const_sg_link_t
1392 Pointer to a constant link object.
1401 See also :cpp:func:`simgrid::s4u::Engine::get_all_links`.
1403 .. doxygenfunction:: simgrid::s4u::Link::by_name(const std::string &name)
1404 .. doxygenfunction:: simgrid::s4u::Link::by_name_or_null(const std::string &name)
1408 .. doxygenfunction:: sg_link_by_name(const char *name)
1409 .. doxygenfunction:: sg_link_count()
1410 .. doxygenfunction:: sg_link_list()
1419 .. doxygenfunction:: simgrid::s4u::Link::get_bandwidth() const
1420 .. doxygenfunction:: simgrid::s4u::Link::get_cname() const
1421 .. doxygenfunction:: simgrid::s4u::Link::get_latency() const
1422 .. doxygenfunction:: simgrid::s4u::Link::get_name() const
1423 .. doxygenfunction:: simgrid::s4u::Link::get_sharing_policy() const
1424 .. doxygenfunction:: simgrid::s4u::Link::get_usage() const
1425 .. doxygenfunction:: simgrid::s4u::Link::is_used() const
1429 .. doxygenfunction:: sg_link_get_bandwidth(const_sg_link_t link)
1430 .. doxygenfunction:: sg_link_get_latency(const_sg_link_t link)
1431 .. doxygenfunction:: sg_link_get_name(const_sg_link_t link)
1432 .. doxygenfunction:: sg_link_is_shared(const_sg_link_t link)
1434 Modifying characteristics
1435 -------------------------
1441 .. doxygenfunction:: simgrid::s4u::Link::set_bandwidth(double value)
1442 .. doxygenfunction:: simgrid::s4u::Link::set_latency(double value)
1446 .. doxygenfunction:: sg_link_set_bandwidth(sg_link_t link, double value)
1447 .. doxygenfunction:: sg_link_set_latency(sg_link_t link, double value)
1449 User data and properties
1450 ------------------------
1456 .. doxygenfunction:: simgrid::s4u::Link::get_property(const std::string &key) const
1457 .. doxygenfunction:: simgrid::s4u::Link::set_property(const std::string &key, const std::string &value)
1461 .. doxygenfunction:: sg_link_get_data(const_sg_link_t link)
1462 .. doxygenfunction:: sg_link_set_data(sg_link_t link, void *data)
1471 See also :cpp:func:`simgrid::s4u::Link::set_state_profile`.
1473 .. doxygenfunction:: simgrid::s4u::Link::is_on() const
1474 .. doxygenfunction:: simgrid::s4u::Link::turn_off()
1475 .. doxygenfunction:: simgrid::s4u::Link::turn_on()
1480 See :ref:`howto_churn` for more details.
1486 .. doxygenfunction:: simgrid::s4u::Link::set_bandwidth_profile(kernel::profile::Profile *profile)
1487 .. doxygenfunction:: simgrid::s4u::Link::set_latency_profile(kernel::profile::Profile *profile)
1488 .. doxygenfunction:: simgrid::s4u::Link::set_state_profile(kernel::profile::Profile *profile)
1497 .. doxygenfunction:: simgrid::s4u::Link::set_host_wifi_rate
1506 .. doxygenvariable:: simgrid::s4u::Link::on_bandwidth_change
1507 .. doxygenvariable:: simgrid::s4u::Link::on_communicate
1508 .. doxygenvariable:: simgrid::s4u::Link::on_communication_state_change
1509 .. doxygenvariable:: simgrid::s4u::Link::on_creation
1510 .. doxygenvariable:: simgrid::s4u::Link::on_destruction
1511 .. doxygenvariable:: simgrid::s4u::Link::on_state_change
1513 .. _API_s4u_NetZone:
1519 .. doxygenclass:: simgrid::s4u::NetZone
1530 #include <simgrid/s4u/NetZone.hpp>
1532 Note that there is no NetZonePtr type and that you cannot use the RAII
1533 idiom on network zones because SimGrid does not allow (yet) to create nor
1534 destroy resources once the simulation is started.
1540 #include <simgrid/zone.h>
1542 .. doxygentypedef:: sg_netzone_t
1543 .. cpp:type:: const s4u_NetZone* const_sg_netzone_t
1545 Pointer to a constant network zone object.
1554 See :cpp:func:`simgrid::s4u::Engine::get_netzone_root`,
1555 :cpp:func:`simgrid::s4u::Engine::netzone_by_name_or_null` and
1556 :cpp:func:`simgrid::s4u::Engine::get_filtered_netzones`.
1560 .. doxygenfunction:: sg_zone_get_by_name(const char *name)
1561 .. doxygenfunction:: sg_zone_get_root()
1570 .. doxygenfunction:: simgrid::s4u::NetZone::get_cname() const
1571 .. doxygenfunction:: simgrid::s4u::NetZone::get_name() const
1575 .. doxygenfunction:: sg_zone_get_name(const_sg_netzone_t zone)
1577 User data and properties
1578 ------------------------
1584 .. doxygenfunction:: simgrid::s4u::NetZone::get_properties() const
1585 .. doxygenfunction:: simgrid::s4u::NetZone::get_property(const std::string &key) const
1586 .. doxygenfunction:: simgrid::s4u::NetZone::set_property(const std::string &key, const std::string &value)
1590 .. doxygenfunction:: sg_zone_get_property_value(const_sg_netzone_t as, const char *name)
1591 .. doxygenfunction:: sg_zone_set_property_value(sg_netzone_t netzone, const char *name, const char *value)
1593 Retrieving components
1594 ---------------------
1600 .. doxygenfunction:: simgrid::s4u::NetZone::get_all_hosts() const
1601 .. doxygenfunction:: simgrid::s4u::NetZone::get_host_count() const
1605 .. doxygenfunction:: sg_zone_get_hosts(const_sg_netzone_t zone, xbt_dynar_t whereto)
1614 .. doxygenfunction:: simgrid::s4u::NetZone::add_component(kernel::routing::NetPoint *elm)
1615 .. doxygenfunction:: simgrid::s4u::NetZone::add_route
1616 .. doxygenfunction:: simgrid::s4u::NetZone::add_bypass_route
1617 .. doxygenfunction:: simgrid::s4u::NetZone::get_children() const
1618 .. doxygenfunction:: simgrid::s4u::NetZone::get_parent() const
1622 .. doxygenfunction:: sg_zone_get_sons(const_sg_netzone_t zone, xbt_dict_t whereto)
1631 .. doxygenvariable:: simgrid::s4u::NetZone::on_creation
1632 .. doxygenvariable:: simgrid::s4u::NetZone::on_seal
1634 .. _API_s4u_VirtualMachine:
1636 =======================
1637 class VirtualMachine
1638 =======================
1641 .. doxygenclass:: simgrid::s4u::VirtualMachine
1651 #include <simgrid/s4u/VirtualMachine.hpp>
1653 Note that there is no VirtualMachinePtr type, and that you cannot use the RAII
1654 idiom on virtual machines. There is no good reason for that and should change in the future.
1660 #include <simgrid/vm.h>
1662 .. doxygentypedef:: sg_vm_t
1663 .. cpp:type:: const s4u_VirtualMachine* const_sg_vm_t
1665 Pointer to a constant virtual machine object.
1674 .. doxygenfunction:: simgrid::s4u::VirtualMachine::VirtualMachine(const std::string &name, Host *physical_host, int core_amount)
1675 .. doxygenfunction:: simgrid::s4u::VirtualMachine::VirtualMachine(const std::string &name, Host *physical_host, int core_amount, size_t ramsize)
1676 .. doxygenfunction:: simgrid::s4u::VirtualMachine::destroy
1680 .. doxygenfunction:: sg_vm_create_core
1681 .. doxygenfunction:: sg_vm_create_multicore
1682 .. doxygenfunction:: sg_vm_destroy
1691 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_pm() const
1692 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_ramsize() const
1693 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_state() const
1695 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_bound(double bound)
1696 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_pm(Host *pm)
1697 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_ramsize(size_t ramsize)
1701 .. doxygenfunction:: sg_vm_get_ramsize(const_sg_vm_t vm)
1702 .. doxygenfunction:: sg_vm_set_bound(sg_vm_t vm, double bound)
1703 .. doxygenfunction:: sg_vm_set_ramsize(sg_vm_t vm, size_t size)
1705 .. doxygenfunction:: sg_vm_get_name
1706 .. doxygenfunction:: sg_vm_get_pm
1707 .. doxygenfunction:: sg_vm_is_created
1708 .. doxygenfunction:: sg_vm_is_running
1709 .. doxygenfunction:: sg_vm_is_suspended
1718 .. doxygenfunction:: simgrid::s4u::VirtualMachine::resume()
1719 .. doxygenfunction:: simgrid::s4u::VirtualMachine::shutdown()
1720 .. doxygenfunction:: simgrid::s4u::VirtualMachine::start()
1721 .. doxygenfunction:: simgrid::s4u::VirtualMachine::suspend()
1725 .. doxygenfunction:: sg_vm_start
1726 .. doxygenfunction:: sg_vm_suspend
1727 .. doxygenfunction:: sg_vm_resume
1728 .. doxygenfunction:: sg_vm_shutdown
1737 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_migration_end
1738 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_migration_start
1739 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_resume
1740 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_shutdown
1741 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_start
1742 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_started
1743 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_suspend
1745 .. _API_s4u_Activity:
1751 .. doxygenclass:: simgrid::s4u::Activity
1753 **Known subclasses:**
1754 :ref:`Communications <API_s4u_Comm>` (started on Mailboxes and consuming links),
1755 :ref:`Executions <API_s4u_Exec>` (started on Host and consuming CPU resources)
1756 :ref:`I/O <API_s4u_Io>` (started on and consuming disks).
1757 See also the :ref:`section on activities <s4u_Activities>` above.
1768 #include <simgrid/s4u/Activity.hpp>
1770 .. doxygentypedef:: ActivityPtr
1779 .. doxygenfunction:: simgrid::s4u::Activity::get_cname
1780 .. doxygenfunction:: simgrid::s4u::Activity::get_name
1781 .. doxygenfunction:: simgrid::s4u::Activity::get_remaining() const
1782 .. doxygenfunction:: simgrid::s4u::Activity::get_state() const
1783 .. doxygenfunction:: simgrid::s4u::Activity::set_remaining(double remains)
1784 .. doxygenfunction:: simgrid::s4u::Activity::set_state(Activity::State state)
1787 Activities life cycle
1788 ---------------------
1794 .. doxygenfunction:: simgrid::s4u::Activity::start
1795 .. doxygenfunction:: simgrid::s4u::Activity::cancel
1796 .. doxygenfunction:: simgrid::s4u::Activity::test
1797 .. doxygenfunction:: simgrid::s4u::Activity::wait
1798 .. doxygenfunction:: simgrid::s4u::Activity::wait_for
1799 .. doxygenfunction:: simgrid::s4u::Activity::wait_until(double time_limit)
1800 .. doxygenfunction:: simgrid::s4u::Activity::vetoable_start()
1802 Suspending and resuming an activity
1803 -----------------------------------
1809 .. doxygenfunction:: simgrid::s4u::Activity::suspend
1810 .. doxygenfunction:: simgrid::s4u::Activity::resume
1811 .. doxygenfunction:: simgrid::s4u::Activity::is_suspended
1819 .. doxygenclass:: simgrid::s4u::Comm
1830 #include <simgrid/s4u/Comm.hpp>
1832 .. doxygentypedef:: CommPtr
1834 .. group-tab:: Python
1838 from simgrid import Comm
1840 .. autoclass:: simgrid.Comm
1846 #include <simgrid/comm.h>
1848 .. doxygentypedef:: sg_comm_t
1849 .. doxygentypedef:: const_sg_comm_t
1858 .. doxygenfunction:: simgrid::s4u::Comm::get_dst_data_size() const
1859 .. doxygenfunction:: simgrid::s4u::Comm::get_mailbox() const
1860 .. doxygenfunction:: simgrid::s4u::Comm::get_sender() const
1861 .. doxygenfunction:: simgrid::s4u::Comm::set_dst_data(void **buff)
1862 .. doxygenfunction:: simgrid::s4u::Comm::set_dst_data(void **buff, size_t size)
1863 .. doxygenfunction:: simgrid::s4u::Comm::detach()
1864 .. doxygenfunction:: simgrid::s4u::Comm::detach(void(*clean_function)(void *))
1865 .. doxygenfunction:: simgrid::s4u::Comm::set_payload_size(double bytes)
1866 .. doxygenfunction:: simgrid::s4u::Comm::set_rate(double rate)
1867 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data(void *buff)
1868 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data(void *buff, size_t size)
1869 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data_size(size_t size)
1874 Most communications are created using :ref:`s4u_mailbox`, but you can
1875 also start direct communications as shown below.
1881 .. doxygenfunction:: simgrid::s4u::Comm::sendto
1882 .. doxygenfunction:: simgrid::s4u::Comm::sendto_init
1883 .. doxygenfunction:: simgrid::s4u::Comm::sendto_async
1885 .. doxygenfunction:: simgrid::s4u::Comm::cancel
1886 .. doxygenfunction:: simgrid::s4u::Comm::start
1887 .. doxygenfunction:: simgrid::s4u::Comm::test
1888 .. doxygenfunction:: simgrid::s4u::Comm::test_any(const std::vector< CommPtr >& comms)
1889 .. doxygenfunction:: simgrid::s4u::Comm::wait
1890 .. doxygenfunction:: simgrid::s4u::Comm::wait_all(const std::vector< CommPtr >& comms)
1891 .. doxygenfunction:: simgrid::s4u::Comm::wait_all_for(const std::vector< CommPtr >& comms, double timeout)
1892 .. doxygenfunction:: simgrid::s4u::Comm::wait_any(const std::vector< CommPtr >& comms)
1893 .. doxygenfunction:: simgrid::s4u::Comm::wait_any_for(const std::vector< CommPtr >& comms, double timeout)
1894 .. doxygenfunction:: simgrid::s4u::Comm::wait_for
1896 .. group-tab:: Python
1898 .. automethod:: simgrid.Comm.test
1899 .. automethod:: simgrid.Comm.wait
1900 .. automethod:: simgrid.Comm.wait_all
1901 .. automethod:: simgrid.Comm.wait_any
1905 .. doxygenfunction:: sg_comm_test
1906 .. doxygenfunction:: sg_comm_wait
1907 .. doxygenfunction:: sg_comm_wait_all
1908 .. doxygenfunction:: sg_comm_wait_any
1917 .. doxygenvariable:: simgrid::s4u::Comm::on_completion
1918 .. doxygenvariable:: simgrid::s4u::Comm::on_start
1926 .. doxygenclass:: simgrid::s4u::Exec
1937 #include <simgrid/s4u/Exec.hpp>
1939 .. doxygentypedef:: ExecPtr
1941 .. group-tab:: Python
1945 from simgrid import Exec
1947 .. autoclass:: simgrid.Exec
1953 #include <simgrid/exec.h>
1955 .. doxygentypedef:: sg_exec_t
1956 .. doxygentypedef:: const_sg_exec_t
1965 .. doxygenfunction:: simgrid::s4u::Exec::get_cost() const
1966 .. doxygenfunction:: simgrid::s4u::Exec::get_finish_time() const
1967 .. doxygenfunction:: simgrid::s4u::Exec::get_host() const
1968 .. doxygenfunction:: simgrid::s4u::Exec::get_host_number() const
1969 .. doxygenfunction:: simgrid::s4u::Exec::get_remaining
1970 .. doxygenfunction:: simgrid::s4u::Exec::get_remaining_ratio
1971 .. doxygenfunction:: simgrid::s4u::Exec::get_start_time() const
1972 .. doxygenfunction:: simgrid::s4u::Exec::set_bound(double bound)
1973 .. doxygenfunction:: simgrid::s4u::Exec::set_host
1974 .. doxygenfunction:: simgrid::s4u::Exec::set_priority(double priority)
1976 .. group-tab:: Python
1978 .. autoattribute:: simgrid.Exec.host
1979 .. autoattribute:: simgrid.Exec.remaining
1980 .. autoattribute:: simgrid.Exec.remaining_ratio
1984 .. doxygenfunction:: sg_exec_set_bound(sg_exec_t exec, double bound)
1985 .. doxygenfunction:: sg_exec_get_name(const_sg_exec_t exec)
1986 .. doxygenfunction:: sg_exec_set_name(sg_exec_t exec, const char* name)
1987 .. doxygenfunction:: sg_exec_set_host(sg_exec_t exec, sg_host_t new_host)
1988 .. doxygenfunction:: sg_exec_get_remaining(const_sg_exec_t exec)
1989 .. doxygenfunction:: sg_exec_get_remaining_ratio(const_sg_exec_t exec)
1998 .. doxygenfunction:: simgrid::s4u::Exec::cancel
1999 .. doxygenfunction:: simgrid::s4u::Exec::start
2000 .. doxygenfunction:: simgrid::s4u::Exec::test
2001 .. doxygenfunction:: simgrid::s4u::Exec::wait
2002 .. doxygenfunction:: simgrid::s4u::Exec::wait_any(const std::vector< ExecPtr >& execs)
2003 .. doxygenfunction:: simgrid::s4u::Exec::wait_any_for(const std::vector< ExecPtr >& execs, double timeout)
2004 .. doxygenfunction:: simgrid::s4u::Exec::wait_for
2006 .. group-tab:: Python
2008 .. automethod:: simgrid.Exec.cancel
2009 .. automethod:: simgrid.Exec.start
2010 .. automethod:: simgrid.Exec.test
2011 .. automethod:: simgrid.Exec.wait
2015 .. doxygenfunction:: sg_exec_start(sg_exec_t exec)
2016 .. doxygenfunction:: sg_exec_cancel(sg_exec_t exec);
2017 .. doxygenfunction:: sg_exec_test(sg_exec_t exec);
2018 .. doxygenfunction:: sg_exec_wait(sg_exec_t exec);
2019 .. doxygenfunction:: sg_exec_wait_for(sg_exec_t exec, double timeout);
2020 .. doxygenfunction:: sg_exec_wait_any_for(sg_exec_t* execs, size_t count, double timeout);
2021 .. doxygenfunction:: sg_exec_wait_any(sg_exec_t* execs, size_t count);
2030 .. doxygenvariable:: simgrid::s4u::Exec::on_start
2031 .. doxygenvariable:: simgrid::s4u::Exec::on_completion
2039 .. doxygenclass:: simgrid::s4u::Io
2050 #include <simgrid/s4u/Io.hpp>
2052 .. doxygentypedef:: IoPtr
2061 .. doxygenfunction:: simgrid::s4u::Io::get_performed_ioops() const
2062 .. doxygenfunction:: simgrid::s4u::Io::get_remaining
2071 .. doxygenfunction:: simgrid::s4u::Io::cancel
2072 .. doxygenfunction:: simgrid::s4u::Io::start
2073 .. doxygenfunction:: simgrid::s4u::Io::test
2074 .. doxygenfunction:: simgrid::s4u::Io::wait
2075 .. doxygenfunction:: simgrid::s4u::Io::wait_for
2077 .. _API_s4u_Synchronizations:
2079 =======================
2080 Synchronization Objects
2081 =======================
2089 .. doxygenclass:: simgrid::s4u::Mutex
2100 #include <simgrid/s4u/Mutex.hpp>
2102 .. doxygentypedef:: MutexPtr
2104 .. doxygenfunction:: simgrid::s4u::Mutex::create()
2110 #include <simgrid/mutex.h>
2112 .. doxygentypedef:: sg_mutex_t
2113 .. cpp:type:: const s4u_Mutex* const_sg_mutex_t
2115 Pointer to a constant mutex object.
2117 .. doxygenfunction:: sg_mutex_init()
2118 .. doxygenfunction:: sg_mutex_destroy(const_sg_mutex_t mutex)
2127 .. doxygenfunction:: simgrid::s4u::Mutex::lock()
2128 .. doxygenfunction:: simgrid::s4u::Mutex::try_lock()
2129 .. doxygenfunction:: simgrid::s4u::Mutex::unlock()
2133 .. doxygenfunction:: sg_mutex_lock(sg_mutex_t mutex)
2134 .. doxygenfunction:: sg_mutex_try_lock(sg_mutex_t mutex)
2135 .. doxygenfunction:: sg_mutex_unlock(sg_mutex_t mutex)
2137 .. _API_s4u_Barrier:
2143 .. doxygenclass:: simgrid::s4u::Barrier
2151 #include <simgrid/s4u/Barrier.hpp>
2153 .. doxygentypedef:: BarrierPtr
2155 .. doxygenfunction:: simgrid::s4u::Barrier::Barrier(unsigned int expected_actors)
2156 .. doxygenfunction:: simgrid::s4u::Barrier::create(unsigned int expected_actors)
2157 .. doxygenfunction:: simgrid::s4u::Barrier::wait()
2163 #include <simgrid/barrier.hpp>
2165 .. doxygentypedef:: sg_bar_t
2166 .. cpp:type:: const s4u_Barrier* const_sg_bar_t
2168 Pointer to a constant barrier object.
2170 .. doxygenfunction:: sg_barrier_init(unsigned int count)
2171 .. doxygenfunction:: sg_barrier_destroy(const_sg_bar_t bar)
2172 .. doxygenfunction:: sg_barrier_wait(sg_bar_t bar)
2175 .. _API_s4u_ConditionVariable:
2177 ==========================
2178 Condition variable
2179 ==========================
2181 .. doxygenclass:: simgrid::s4u::ConditionVariable
2192 #include <simgrid/s4u/ConditionVariable.hpp>
2194 .. doxygentypedef:: ConditionVariablePtr
2196 .. doxygenfunction:: simgrid::s4u::ConditionVariable::create()
2202 #include <simgrid/cond.h>
2204 .. doxygentypedef:: sg_cond_t
2205 .. doxygentypedef:: const_sg_cond_t
2206 .. doxygenfunction:: sg_cond_init
2207 .. doxygenfunction:: sg_cond_destroy
2209 Waiting and notifying
2210 ---------------------
2216 .. doxygenfunction:: simgrid::s4u::ConditionVariable::notify_all()
2217 .. doxygenfunction:: simgrid::s4u::ConditionVariable::notify_one()
2218 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(s4u::MutexPtr lock)
2219 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(const std::unique_lock< s4u::Mutex > &lock)
2220 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(const std::unique_lock< Mutex > &lock, P pred)
2221 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, double duration)
2222 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, double duration, P pred)
2223 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, std::chrono::duration< Rep, Period > duration)
2224 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, std::chrono::duration< Rep, Period > duration, P pred)
2225 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, const SimulationTimePoint< Duration > &timeout_time)
2226 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, const SimulationTimePoint< Duration > &timeout_time, P pred)
2227 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, double timeout_time)
2228 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, double timeout_time, P pred)
2232 .. doxygenfunction:: sg_cond_notify_all
2233 .. doxygenfunction:: sg_cond_notify_one
2234 .. doxygenfunction:: sg_cond_wait
2235 .. doxygenfunction:: sg_cond_wait_for
2237 .. _API_s4u_Semaphore:
2243 .. doxygenclass:: simgrid::s4u::Semaphore
2255 #include <simgrid/s4u/Semaphore.hpp>
2257 .. doxygentypedef:: SemaphorePtr
2258 .. doxygenfunction:: simgrid::s4u::Semaphore::create(unsigned int initial_capacity)
2264 #include <simgrid/semaphore.h>
2266 .. doxygentypedef:: sg_sem_t
2267 .. cpp:type:: const s4u_Semaphore* const_sg_sem_t
2269 Pointer to a constant semaphore object.
2271 .. doxygenfunction:: sg_sem_init(int initial_value)
2272 .. doxygenfunction:: sg_sem_destroy(const_sg_sem_t sem)
2281 .. doxygenfunction:: simgrid::s4u::Semaphore::acquire()
2282 .. doxygenfunction:: simgrid::s4u::Semaphore::acquire_timeout(double timeout)
2283 .. doxygenfunction:: simgrid::s4u::Semaphore::get_capacity() const
2284 .. doxygenfunction:: simgrid::s4u::Semaphore::release()
2285 .. doxygenfunction:: simgrid::s4u::Semaphore::would_block() const
2289 .. doxygenfunction:: sg_sem_acquire(sg_sem_t sem)
2290 .. doxygenfunction:: sg_sem_acquire_timeout(sg_sem_t sem, double timeout)
2291 .. doxygenfunction:: sg_sem_get_capacity(const_sg_sem_t sem)
2292 .. doxygenfunction:: sg_sem_release(sg_sem_t sem)
2293 .. doxygenfunction:: sg_sem_would_block(const_sg_sem_t sem)