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 .. cpp:type:: const s4u_Actor* const_sg_actor_t
443 Pointer to a constant actor object.
445 .. doxygenfunction:: sg_actor_ref
446 .. doxygenfunction:: sg_actor_unref
456 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, const std::function< void()> &code)
457 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, F code)
458 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, F code, Args... args)
459 .. doxygenfunction:: simgrid::s4u::Actor::create(const std::string &name, s4u::Host *host, const std::string &function, std::vector< std::string > args)
461 .. doxygenfunction:: simgrid::s4u::Actor::init(const std::string &name, s4u::Host *host)
462 .. doxygenfunction:: simgrid::s4u::Actor::start(const std::function< void()> &code)
464 .. group-tab:: Python
466 .. automethod:: simgrid.Actor.create
470 .. doxygenfunction:: sg_actor_create(const char *name, sg_host_t host, xbt_main_func_t code, int argc, char *const *argv)
471 .. doxygenfunction:: sg_actor_init(const char *name, sg_host_t host)
472 .. doxygenfunction:: sg_actor_start(sg_actor_t actor, xbt_main_func_t code, int argc, char *const *argv)
474 .. doxygenfunction:: sg_actor_attach(const char *name, void *data, sg_host_t host, xbt_dict_t properties)
475 .. doxygenfunction:: sg_actor_detach()
484 .. doxygenfunction:: simgrid::s4u::Actor::by_pid(aid_t pid)
485 .. doxygenfunction:: simgrid::s4u::Actor::self()
487 .. group-tab:: Python
489 .. automethod:: simgrid.Actor.by_pid
490 .. automethod:: simgrid.Actor.self
494 .. doxygenfunction:: sg_actor_by_pid(aid_t pid)
495 .. doxygenfunction:: sg_actor_self()
504 .. doxygenfunction:: simgrid::s4u::Actor::get_cname
505 .. doxygenfunction:: simgrid::s4u::Actor::get_name
506 .. doxygenfunction:: simgrid::s4u::Actor::get_pid
507 .. doxygenfunction:: simgrid::s4u::Actor::get_ppid
508 .. doxygenfunction:: simgrid::s4u::Actor::get_properties() const
509 .. doxygenfunction:: simgrid::s4u::Actor::get_property(const std::string &key) const
510 .. doxygenfunction:: simgrid::s4u::Actor::set_property(const std::string &key, const std::string &value)
512 .. doxygenfunction:: simgrid::s4u::Actor::get_host
513 .. doxygenfunction:: simgrid::s4u::Actor::set_host
515 .. doxygenfunction:: simgrid::s4u::Actor::get_refcount
516 .. doxygenfunction:: simgrid::s4u::Actor::get_impl
518 .. group-tab:: Python
520 .. autoattribute:: simgrid.Actor.name
521 .. autoattribute:: simgrid.Actor.host
522 .. autoattribute:: simgrid.Actor.pid
523 .. autoattribute:: simgrid.Actor.ppid
527 .. doxygenfunction:: sg_actor_get_name(const_sg_actor_t actor)
528 .. doxygenfunction:: sg_actor_get_pid(const_sg_actor_t actor)
529 .. doxygenfunction:: sg_actor_get_ppid(const_sg_actor_t actor)
530 .. doxygenfunction:: sg_actor_get_properties(const_sg_actor_t actor)
531 .. doxygenfunction:: sg_actor_get_property_value(const_sg_actor_t actor, const char *name)
533 .. doxygenfunction:: sg_actor_get_host(const_sg_actor_t actor)
534 .. doxygenfunction:: sg_actor_set_host(sg_actor_t actor, sg_host_t host)
536 .. doxygenfunction:: sg_actor_get_data(const_sg_actor_t actor)
537 .. doxygenfunction:: sg_actor_set_data(sg_actor_t actor, void *userdata)
539 Suspending and resuming actors
540 ------------------------------
546 .. doxygenfunction:: simgrid::s4u::Actor::suspend()
547 .. doxygenfunction:: simgrid::s4u::Actor::resume()
548 .. doxygenfunction:: simgrid::s4u::Actor::is_suspended
550 .. group-tab:: Python
552 .. automethod:: simgrid.Actor.resume
553 .. automethod:: simgrid.Actor.suspend
554 .. automethod:: simgrid.Actor.is_suspended
558 .. doxygenfunction:: sg_actor_suspend(sg_actor_t actor)
559 .. doxygenfunction:: sg_actor_resume(sg_actor_t actor)
560 .. doxygenfunction:: sg_actor_is_suspended(const_sg_actor_t actor)
562 Specifying when actors should terminate
563 ---------------------------------------
569 .. doxygenfunction:: simgrid::s4u::Actor::kill()
570 .. doxygenfunction:: simgrid::s4u::Actor::kill_all()
571 .. doxygenfunction:: simgrid::s4u::Actor::set_kill_time(double time)
572 .. doxygenfunction:: simgrid::s4u::Actor::get_kill_time
574 .. doxygenfunction:: simgrid::s4u::Actor::restart()
575 .. doxygenfunction:: simgrid::s4u::Actor::daemonize()
576 .. doxygenfunction:: simgrid::s4u::Actor::is_daemon
578 .. group-tab:: Python
580 .. automethod:: simgrid.Actor.kill
581 .. automethod:: simgrid.Actor.kill_all
583 .. automethod:: simgrid.Actor.daemonize
584 .. automethod:: simgrid.Actor.is_daemon
588 .. doxygenfunction:: sg_actor_kill(sg_actor_t actor)
589 .. doxygenfunction:: sg_actor_kill_all()
590 .. doxygenfunction:: sg_actor_set_kill_time(sg_actor_t actor, double kill_time)
592 .. doxygenfunction:: sg_actor_restart(sg_actor_t actor)
593 .. doxygenfunction:: sg_actor_daemonize(sg_actor_t actor)
594 .. doxygenfunction:: sg_actor_is_daemon
596 .. _API_s4u_Actor_end:
598 Reacting to the end of actors
599 -----------------------------
605 .. doxygenfunction:: simgrid::s4u::Actor::on_exit
606 .. doxygenfunction:: simgrid::s4u::Actor::join() const
607 .. doxygenfunction:: simgrid::s4u::Actor::join(double timeout) const
608 .. doxygenfunction:: simgrid::s4u::Actor::set_auto_restart(bool autorestart)
610 .. group-tab:: Python
612 .. automethod:: simgrid.Actor.join
616 .. doxygenfunction:: sg_actor_on_exit
617 .. doxygenfunction:: sg_actor_join(const_sg_actor_t actor, double timeout)
618 .. doxygenfunction:: sg_actor_set_auto_restart(sg_actor_t actor, int auto_restart)
627 .. doxygenvariable:: simgrid::s4u::Actor::on_creation
628 .. doxygenvariable:: simgrid::s4u::Actor::on_suspend
629 .. doxygenvariable:: simgrid::s4u::Actor::on_host_change
630 .. doxygenvariable:: simgrid::s4u::Actor::on_resume
631 .. doxygenvariable:: simgrid::s4u::Actor::on_sleep
632 .. doxygenvariable:: simgrid::s4u::Actor::on_wake_up
633 .. doxygenvariable:: simgrid::s4u::Actor::on_termination
634 .. doxygenvariable:: simgrid::s4u::Actor::on_destruction
636 .. _API_s4u_this_actor:
642 These functions can be used in your user code to interact with the actor
643 currently running (the one retrieved with :cpp:func:`simgrid::s4u::Actor::self`).
644 Using these functions can greatly improve the code readability.
653 .. doxygenfunction:: simgrid::s4u::this_actor::get_cname()
654 .. doxygenfunction:: simgrid::s4u::this_actor::get_name()
655 .. doxygenfunction:: simgrid::s4u::this_actor::get_pid()
656 .. doxygenfunction:: simgrid::s4u::this_actor::get_ppid()
657 .. doxygenfunction:: simgrid::s4u::this_actor::is_maestro()
659 .. doxygenfunction:: simgrid::s4u::this_actor::get_host()
660 .. doxygenfunction:: simgrid::s4u::this_actor::set_host(Host *new_host)
662 .. group-tab:: Python
664 .. autofunction:: simgrid.this_actor.get_host
665 .. autofunction:: simgrid.this_actor.set_host
669 .. doxygenfunction:: sg_actor_self_get_data()
670 .. doxygenfunction:: sg_actor_self_set_data(void *data)
671 .. doxygenfunction:: sg_actor_self_get_name()
672 .. doxygenfunction:: sg_actor_self_get_pid()
673 .. doxygenfunction:: sg_actor_self_get_ppid()
674 .. doxygenfunction:: sg_host_self()
675 .. doxygenfunction:: sg_host_self_get_name()
677 Suspending and resuming
678 -----------------------
684 .. doxygenfunction:: simgrid::s4u::this_actor::suspend()
685 .. doxygenfunction:: simgrid::s4u::this_actor::yield()
687 .. group-tab:: Python
689 .. autofunction:: simgrid.this_actor.suspend
690 .. autofunction:: simgrid.this_actor.yield_
694 .. doxygenfunction:: sg_actor_yield()
701 .. group-tab:: Python
703 .. autofunction:: simgrid.this_actor.info
704 .. autofunction:: simgrid.this_actor.error
713 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_for(double duration)
714 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_for(std::chrono::duration< Rep, Period > duration)
715 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_until(const SimulationTimePoint< Duration > &wakeup_time)
716 .. doxygenfunction:: simgrid::s4u::this_actor::sleep_until(double wakeup_time)
718 .. group-tab:: Python
720 .. autofunction:: simgrid.this_actor.sleep_for
721 .. autofunction:: simgrid.this_actor.sleep_until
725 .. doxygenfunction:: sg_actor_sleep_for(double duration)
727 Simulating executions
728 ---------------------
730 Simulate the execution of some code on this actor. You can either simulate
731 parallel or sequential code and you can either block upon the termination of
732 the execution, or start an asynchronous activity.
738 .. doxygenfunction:: simgrid::s4u::this_actor::exec_async
739 .. 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)
740 .. doxygenfunction:: simgrid::s4u::this_actor::exec_init(double flops_amounts)
741 .. doxygenfunction:: simgrid::s4u::this_actor::execute(double flop)
742 .. doxygenfunction:: simgrid::s4u::this_actor::execute(double flop, double priority)
743 .. 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 .. 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, double timeout)
746 .. group-tab:: Python
748 .. autofunction:: simgrid.this_actor.exec_init
749 .. autofunction:: simgrid.this_actor.execute
753 .. doxygenfunction:: sg_actor_execute(double flops)
754 .. doxygenfunction:: sg_actor_execute_with_priority(double flops, double priority)
755 .. doxygenfunction:: sg_actor_exec_init(double computation_amount)
756 .. doxygenfunction:: sg_actor_exec_async(double computation_amount)
757 .. doxygenfunction:: sg_actor_parallel_exec_init(int host_nb, const sg_host_t* host_list, double* flops_amount, double* bytes_amount);
766 .. doxygenfunction:: simgrid::s4u::this_actor::exit()
767 .. doxygenfunction:: simgrid::s4u::this_actor::on_exit(const std::function< void(bool)> &fun)
769 .. group-tab:: Python
771 .. autofunction:: simgrid.this_actor.exit
772 .. autofunction:: simgrid.this_actor.on_exit
776 See also :cpp:func:`sg_actor_on_exit`.
778 .. doxygenfunction:: sg_actor_exit
786 .. doxygenclass:: simgrid::s4u::Engine
795 .. doxygenfunction:: simgrid::s4u::Engine::Engine(int *argc, char **argv)
796 .. doxygenfunction:: simgrid::s4u::Engine::is_initialized()
797 .. doxygenfunction:: simgrid::s4u::Engine::shutdown()
798 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &str)
799 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, bool value)
800 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, double value)
801 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, int value)
802 .. doxygenfunction:: simgrid::s4u::Engine::set_config(const std::string &name, const std::string &value)
804 .. doxygenfunction:: simgrid::s4u::Engine::load_deployment
805 .. doxygenfunction:: simgrid::s4u::Engine::load_platform
806 .. doxygenfunction:: simgrid::s4u::Engine::register_actor(const std::string &name)
807 .. doxygenfunction:: simgrid::s4u::Engine::register_actor(const std::string &name, F code)
808 .. doxygenfunction:: simgrid::s4u::Engine::register_default(const std::function< void(int, char **)> &code)
809 .. doxygenfunction:: simgrid::s4u::Engine::register_default(const kernel::actor::ActorCodeFactory &factory)
811 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const std::function< void(int, char **)> &code)
812 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const std::function< void(std::vector< std::string >)> &code)
813 .. doxygenfunction:: simgrid::s4u::Engine::register_function(const std::string &name, const kernel::actor::ActorCodeFactory &factory)
815 .. group-tab:: Python
817 .. automethod:: simgrid.Engine.load_deployment
818 .. automethod:: simgrid.Engine.load_platform
819 .. automethod:: simgrid.Engine.register_actor
823 .. doxygenfunction:: simgrid_init
825 .. doxygenfunction:: simgrid_load_deployment
826 .. doxygenfunction:: simgrid_load_platform
827 .. doxygenfunction:: simgrid_register_default
828 .. doxygenfunction:: simgrid_register_function
837 .. doxygenfunction:: simgrid::s4u::Engine::get_clock()
838 .. doxygenfunction:: simgrid::s4u::Engine::run
840 .. group-tab:: Python
842 .. automethod:: simgrid.Engine.get_clock
843 .. automethod:: simgrid.Engine.run
847 .. doxygenfunction:: simgrid_get_clock
848 .. doxygenfunction:: simgrid_run
857 .. doxygenfunction:: simgrid::s4u::Engine::get_actor_count
858 .. doxygenfunction:: simgrid::s4u::Engine::get_all_actors
859 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_actors
863 .. doxygenfunction:: simgrid_get_actor_count()
872 .. doxygenfunction:: simgrid::s4u::Engine::get_all_hosts
873 .. doxygenfunction:: simgrid::s4u::Engine::get_host_count
874 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_hosts
875 .. doxygenfunction:: simgrid::s4u::Engine::host_by_name
876 .. doxygenfunction:: simgrid::s4u::Engine::host_by_name_or_null
878 .. group-tab:: Python
880 .. automethod:: simgrid.Engine.get_all_hosts
884 See also :cpp:func:`sg_host_list` and :cpp:func:`sg_host_count`.
893 .. doxygenfunction:: simgrid::s4u::Engine::get_all_links
894 .. doxygenfunction:: simgrid::s4u::Engine::get_link_count
895 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_links
896 .. doxygenfunction:: simgrid::s4u::Engine::link_by_name
897 .. doxygenfunction:: simgrid::s4u::Engine::link_by_name_or_null
899 Interacting with the routing
900 ----------------------------
906 .. doxygenfunction:: simgrid::s4u::Engine::get_all_netpoints
907 .. doxygenfunction:: simgrid::s4u::Engine::get_filtered_netzones
908 .. doxygenfunction:: simgrid::s4u::Engine::get_instance()
909 .. doxygenfunction:: simgrid::s4u::Engine::get_netzone_root
910 .. doxygenfunction:: simgrid::s4u::Engine::netpoint_by_name_or_null
911 .. doxygenfunction:: simgrid::s4u::Engine::netzone_by_name_or_null
912 .. doxygenfunction:: simgrid::s4u::Engine::set_netzone_root(const NetZone *netzone)
921 .. doxygenvariable:: simgrid::s4u::Engine::on_deadlock
922 .. doxygenvariable:: simgrid::s4u::Engine::on_platform_created
923 .. doxygenvariable:: simgrid::s4u::Engine::on_platform_creation
924 .. doxygenvariable:: simgrid::s4u::Engine::on_simulation_end
925 .. doxygenvariable:: simgrid::s4u::Engine::on_time_advance
933 .. doxygenclass:: simgrid::s4u::Mailbox
935 Please also refer to the :ref:`full doc on s4u::Mailbox <s4u_mailbox>`.
946 #include <simgrid/s4u/Mailbox.hpp>
948 Note that there is no MailboxPtr type and that you cannot use the RAII
949 idiom on mailboxes because they are internal objects to the simulation
950 engine. Once created, there is no way to destroy a mailbox before the end
953 .. doxygenfunction:: simgrid::s4u::Mailbox::by_name(const std::string &name)
955 .. group-tab:: Python
959 #include <simgrid/mailbox.h>
961 .. autoclass:: simgrid.Mailbox
963 .. automethod:: simgrid.Mailbox.by_name
969 #include <simgrid/s4u/mailbox.h>
971 .. doxygentypedef:: sg_mailbox_t
972 .. doxygentypedef:: const_sg_mailbox_t
974 .. doxygenfunction:: sg_mailbox_by_name(const char *alias)
983 .. doxygenfunction:: simgrid::s4u::Mailbox::get_cname
984 .. doxygenfunction:: simgrid::s4u::Mailbox::get_name
986 .. group-tab:: Python
988 .. autoattribute:: simgrid.Mailbox.name
997 .. doxygenfunction:: simgrid::s4u::Mailbox::put(void *payload, uint64_t simulated_size_in_bytes)
998 .. doxygenfunction:: simgrid::s4u::Mailbox::put(void *payload, uint64_t simulated_size_in_bytes, double timeout)
999 .. doxygenfunction:: simgrid::s4u::Mailbox::put_async(void *data, uint64_t simulated_size_in_bytes)
1000 .. doxygenfunction:: simgrid::s4u::Mailbox::put_init()
1001 .. doxygenfunction:: simgrid::s4u::Mailbox::put_init(void *data, uint64_t simulated_size_in_bytes)
1003 .. group-tab:: Python
1005 .. automethod:: simgrid.Mailbox.put
1006 .. automethod:: simgrid.Mailbox.put_async
1010 .. doxygenfunction:: sg_mailbox_put(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1011 .. doxygenfunction:: sg_mailbox_put_init(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1012 .. doxygenfunction:: sg_mailbox_put_async(sg_mailbox_t mailbox, void *payload, long simulated_size_in_bytes)
1022 .. doxygenfunction:: simgrid::s4u::Mailbox::empty
1023 .. doxygenfunction:: simgrid::s4u::Mailbox::front
1024 .. doxygenfunction:: simgrid::s4u::Mailbox::get()
1025 .. doxygenfunction:: simgrid::s4u::Mailbox::get(double timeout)
1026 .. doxygenfunction:: simgrid::s4u::Mailbox::get_async(T **data)
1027 .. doxygenfunction:: simgrid::s4u::Mailbox::get_init()
1028 .. doxygenfunction:: simgrid::s4u::Mailbox::iprobe(int type, bool(*match_fun)(void *, void *, kernel::activity::CommImpl *), void *data)
1029 .. doxygenfunction:: simgrid::s4u::Mailbox::listen
1030 .. doxygenfunction:: simgrid::s4u::Mailbox::ready
1032 .. group-tab:: Python
1034 .. automethod:: simgrid.Mailbox.get
1038 .. doxygenfunction:: sg_mailbox_get(sg_mailbox_t mailbox)
1039 .. doxygenfunction:: sg_mailbox_get_async(sg_mailbox_t mailbox, void **data)
1040 .. doxygenfunction:: sg_mailbox_get_name(const_sg_mailbox_t mailbox)
1041 .. doxygenfunction:: sg_mailbox_listen(const char *alias)
1046 See :ref:`s4u_receiving_actor`.
1052 .. doxygenfunction:: simgrid::s4u::Mailbox::get_receiver
1053 .. doxygenfunction:: simgrid::s4u::Mailbox::set_receiver(ActorPtr actor)
1057 .. doxygenfunction:: sg_mailbox_set_receiver(const char *alias)
1059 .. _API_s4u_Resource:
1071 .. doxygenclass:: simgrid::s4u::Disk
1082 #include <simgrid/s4u/Disk.hpp>
1084 Note that there is no DiskPtr type and that you cannot use the RAII
1085 idiom on disks because SimGrid does not allow (yet) to create nor
1086 destroy resources once the simulation is started.
1096 .. doxygenfunction:: simgrid::s4u::Disk::get_cname() const
1097 .. doxygenfunction:: simgrid::s4u::Disk::get_host() const
1098 .. doxygenfunction:: simgrid::s4u::Disk::get_name() const
1099 .. doxygenfunction:: simgrid::s4u::Disk::get_properties() const
1100 .. doxygenfunction:: simgrid::s4u::Disk::get_property(const std::string &key) const
1101 .. doxygenfunction:: simgrid::s4u::Disk::get_read_bandwidth() const
1102 .. doxygenfunction:: simgrid::s4u::Disk::get_write_bandwidth() const
1103 .. doxygenfunction:: simgrid::s4u::Disk::set_property(const std::string &, const std::string &value)
1112 .. doxygenfunction:: simgrid::s4u::Disk::io_init(sg_size_t size, s4u::Io::OpType type) const
1113 .. doxygenfunction:: simgrid::s4u::Disk::read(sg_size_t size) const
1114 .. doxygenfunction:: simgrid::s4u::Disk::read_async(sg_size_t size) const
1115 .. doxygenfunction:: simgrid::s4u::Disk::write(sg_size_t size) const
1116 .. doxygenfunction:: simgrid::s4u::Disk::write_async(sg_size_t size) const
1125 .. doxygenvariable:: simgrid::s4u::Disk::on_creation
1126 .. doxygenvariable:: simgrid::s4u::Disk::on_destruction
1127 .. doxygenvariable:: simgrid::s4u::Disk::on_state_change
1136 .. doxygenclass:: simgrid::s4u::Host
1147 #include <simgrid/s4u/Host.hpp>
1149 Note that there is no HostPtr type, and that you cannot use the RAII
1150 idiom on hosts because SimGrid does not allow (yet) to create nor
1151 destroy resources once the simulation is started.
1153 .. doxygenfunction:: simgrid::s4u::Host::destroy()
1155 .. group-tab:: Python
1159 from simgrid import Host
1165 #include <simgrid/host.h>
1167 .. doxygentypedef:: sg_host_t
1168 .. cpp:type:: const s4u_Host* const_sg_host_t
1170 Pointer to a constant host object.
1179 See also :cpp:func:`simgrid::s4u::Engine::get_all_hosts`.
1181 .. doxygenfunction:: simgrid::s4u::Host::by_name(const std::string &name)
1182 .. doxygenfunction:: simgrid::s4u::Host::by_name_or_null(const std::string &name)
1183 .. doxygenfunction:: simgrid::s4u::Host::current()
1185 .. group-tab:: Python
1187 See also :py:func:`simgrid.Engine.get_all_hosts`.
1189 .. automethod:: simgrid.Host.by_name
1190 .. automethod:: simgrid.Host.current
1194 .. doxygenfunction:: sg_host_by_name(const char *name)
1195 .. doxygenfunction:: sg_host_count()
1196 .. doxygenfunction:: sg_host_list()
1197 .. doxygenfunction:: sg_hosts_as_dynar()
1206 .. doxygenfunction:: simgrid::s4u::Host::get_cname() const
1207 .. doxygenfunction:: simgrid::s4u::Host::get_core_count() const
1208 .. doxygenfunction:: simgrid::s4u::Host::get_name() const
1209 .. doxygenfunction:: simgrid::s4u::Host::get_available_speed() const
1210 .. doxygenfunction:: simgrid::s4u::Host::get_load() const
1211 .. doxygenfunction:: simgrid::s4u::Host::get_speed() const
1213 .. group-tab:: Python
1215 .. autoattribute:: simgrid.Host.name
1216 .. autoattribute:: simgrid.Host.load
1217 .. autoattribute:: simgrid.Host.pstate
1218 .. autoattribute:: simgrid.Host.speed
1222 .. doxygenfunction:: sg_host_core_count(const_sg_host_t host)
1223 .. doxygenfunction:: sg_host_dump(const_sg_host_t ws)
1224 .. doxygenfunction:: sg_host_get_name(const_sg_host_t host)
1225 .. doxygenfunction:: sg_host_get_load(const_sg_host_t host)
1226 .. doxygenfunction:: sg_host_get_speed(const_sg_host_t host)
1228 User data and properties
1229 ------------------------
1235 .. doxygenfunction:: simgrid::s4u::Host::get_properties() const
1236 .. doxygenfunction:: simgrid::s4u::Host::get_property(const std::string &key) const
1237 .. doxygenfunction:: simgrid::s4u::Host::set_properties(const std::unordered_map< std::string, std::string > &properties)
1238 .. doxygenfunction:: simgrid::s4u::Host::set_property(const std::string &key, const std::string &value)
1242 .. doxygenfunction:: sg_host_set_property_value(sg_host_t host, const char *name, const char *value)
1243 .. doxygenfunction:: sg_host_get_properties(const_sg_host_t host)
1244 .. doxygenfunction:: sg_host_get_property_value(const_sg_host_t host, const char *name)
1245 .. doxygenfunction:: sg_host_extension_create(void(*deleter)(void *))
1246 .. doxygenfunction:: sg_host_extension_get(const_sg_host_t host, size_t rank)
1248 Retrieving components
1249 ---------------------
1255 .. doxygenfunction:: simgrid::s4u::Host::add_disk(const Disk *disk)
1256 .. doxygenfunction:: simgrid::s4u::Host::get_actor_count() const
1257 .. doxygenfunction:: simgrid::s4u::Host::get_all_actors() const
1258 .. doxygenfunction:: simgrid::s4u::Host::get_disks() const
1259 .. doxygenfunction:: simgrid::s4u::Host::remove_disk(const std::string &disk_name)
1263 .. doxygenfunction:: sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
1272 .. doxygenfunction:: simgrid::s4u::Host::is_on() const
1273 .. doxygenfunction:: simgrid::s4u::Host::turn_off()
1274 .. doxygenfunction:: simgrid::s4u::Host::turn_on()
1278 .. doxygenfunction:: sg_host_is_on(const_sg_host_t host)
1279 .. doxygenfunction:: sg_host_turn_off(sg_host_t host)
1280 .. doxygenfunction:: sg_host_turn_on(sg_host_t host)
1289 .. doxygenfunction:: simgrid::s4u::Host::get_pstate() const
1290 .. doxygenfunction:: simgrid::s4u::Host::get_pstate_count() const
1291 .. doxygenfunction:: simgrid::s4u::Host::get_pstate_speed(int pstate_index) const
1292 .. doxygenfunction:: simgrid::s4u::Host::set_pstate(int pstate_index)
1293 .. doxygenfunction:: simgrid::s4u::Host::set_speed_profile(kernel::profile::Profile *p)
1294 .. doxygenfunction:: simgrid::s4u::Host::set_state_profile(kernel::profile::Profile *p)
1296 .. group-tab:: Python
1298 .. automethod:: simgrid.Host.get_pstate_count
1299 .. automethod:: simgrid.Host.get_pstate_speed
1303 .. doxygenfunction:: sg_host_get_available_speed(const_sg_host_t host)
1304 .. doxygenfunction:: sg_host_get_nb_pstates(const_sg_host_t host)
1305 .. doxygenfunction:: sg_host_get_pstate(const_sg_host_t host)
1306 .. doxygenfunction:: sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
1307 .. doxygenfunction:: sg_host_set_pstate(sg_host_t host, int pstate)
1316 .. doxygenfunction:: simgrid::s4u::Host::exec_async
1317 .. doxygenfunction:: simgrid::s4u::Host::execute(double flops) const
1318 .. doxygenfunction:: simgrid::s4u::Host::execute(double flops, double priority) const
1320 Platform and routing
1321 --------------------
1323 You can also start direct communications between two arbitrary hosts
1324 using :cpp:func:`Comm::sendto() <simgrid::s4u::Comm::sendto()>`.
1330 .. doxygenfunction:: simgrid::s4u::Host::get_englobing_zone() const
1331 .. doxygenfunction:: simgrid::s4u::Host::get_netpoint() const
1332 .. doxygenfunction:: simgrid::s4u::Host::route_to(const Host *dest, std::vector< Link * > &links, double *latency) const
1333 .. doxygenfunction:: simgrid::s4u::Host::route_to(const Host *dest, std::vector< kernel::resource::LinkImpl * > &links, double *latency) const
1337 .. doxygenfunction:: sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
1338 .. doxygenfunction:: sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
1339 .. doxygenfunction:: sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
1340 .. doxygenfunction:: sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
1349 .. doxygenvariable:: simgrid::s4u::Host::on_creation
1350 .. doxygenvariable:: simgrid::s4u::Host::on_destruction
1351 .. doxygenvariable:: simgrid::s4u::Host::on_speed_change
1352 .. doxygenvariable:: simgrid::s4u::Host::on_state_change
1360 .. doxygenclass:: simgrid::s4u::Link
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_bypass_route
1615 .. doxygenfunction:: simgrid::s4u::NetZone::add_component(kernel::routing::NetPoint *elm)
1616 .. doxygenfunction:: simgrid::s4u::NetZone::add_route
1617 .. doxygenfunction:: simgrid::s4u::NetZone::get_children() const
1618 .. doxygenfunction:: simgrid::s4u::NetZone::get_father()
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_route_creation
1633 .. doxygenvariable:: simgrid::s4u::NetZone::on_seal
1635 .. _API_s4u_VirtualMachine:
1637 =======================
1638 class VirtualMachine
1639 =======================
1642 .. doxygenclass:: simgrid::s4u::VirtualMachine
1652 #include <simgrid/s4u/VirtualMachine.hpp>
1654 Note that there is no VirtualMachinePtr type, and that you cannot use the RAII
1655 idiom on virtual machines. There is no good reason for that and should change in the future.
1661 #include <simgrid/vm.h>
1663 .. doxygentypedef:: sg_vm_t
1664 .. cpp:type:: const s4u_VirtualMachine* const_sg_vm_t
1666 Pointer to a constant virtual machine object.
1675 .. doxygenfunction:: simgrid::s4u::VirtualMachine::VirtualMachine(const std::string &name, Host *physical_host, int core_amount)
1676 .. doxygenfunction:: simgrid::s4u::VirtualMachine::VirtualMachine(const std::string &name, Host *physical_host, int core_amount, size_t ramsize)
1677 .. doxygenfunction:: simgrid::s4u::VirtualMachine::destroy
1681 .. doxygenfunction:: sg_vm_create_core
1682 .. doxygenfunction:: sg_vm_create_multicore
1683 .. doxygenfunction:: sg_vm_destroy
1692 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_pm() const
1693 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_ramsize() const
1694 .. doxygenfunction:: simgrid::s4u::VirtualMachine::get_state() const
1696 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_bound(double bound)
1697 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_pm(Host *pm)
1698 .. doxygenfunction:: simgrid::s4u::VirtualMachine::set_ramsize(size_t ramsize)
1702 .. doxygenfunction:: sg_vm_get_ramsize(const_sg_vm_t vm)
1703 .. doxygenfunction:: sg_vm_set_bound(sg_vm_t vm, double bound)
1704 .. doxygenfunction:: sg_vm_set_ramsize(sg_vm_t vm, size_t size)
1706 .. doxygenfunction:: sg_vm_get_name
1707 .. doxygenfunction:: sg_vm_get_pm
1708 .. doxygenfunction:: sg_vm_is_created
1709 .. doxygenfunction:: sg_vm_is_running
1710 .. doxygenfunction:: sg_vm_is_suspended
1719 .. doxygenfunction:: simgrid::s4u::VirtualMachine::resume()
1720 .. doxygenfunction:: simgrid::s4u::VirtualMachine::shutdown()
1721 .. doxygenfunction:: simgrid::s4u::VirtualMachine::start()
1722 .. doxygenfunction:: simgrid::s4u::VirtualMachine::suspend()
1726 .. doxygenfunction:: sg_vm_start
1727 .. doxygenfunction:: sg_vm_suspend
1728 .. doxygenfunction:: sg_vm_resume
1729 .. doxygenfunction:: sg_vm_shutdown
1738 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_migration_end
1739 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_migration_start
1740 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_resume
1741 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_shutdown
1742 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_start
1743 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_started
1744 .. doxygenvariable:: simgrid::s4u::VirtualMachine::on_suspend
1746 .. _API_s4u_Activity:
1752 .. doxygenclass:: simgrid::s4u::Activity
1754 **Known subclasses:**
1755 :ref:`Communications <API_s4u_Comm>` (started on Mailboxes and consuming links),
1756 :ref:`Executions <API_s4u_Exec>` (started on Host and consuming CPU resources)
1757 :ref:`I/O <API_s4u_Io>` (started on and consumming disks).
1758 See also the :ref:`section on activities <s4u_Activities>` above.
1769 #include <simgrid/s4u/Activity.hpp>
1771 .. doxygentypedef:: ActivityPtr
1780 .. doxygenfunction:: simgrid::s4u::Activity::get_cname
1781 .. doxygenfunction:: simgrid::s4u::Activity::get_name
1782 .. doxygenfunction:: simgrid::s4u::Activity::get_remaining() const
1783 .. doxygenfunction:: simgrid::s4u::Activity::get_state() const
1784 .. doxygenfunction:: simgrid::s4u::Activity::set_remaining(double remains)
1785 .. doxygenfunction:: simgrid::s4u::Activity::set_state(Activity::State state)
1788 Activities life cycle
1789 ---------------------
1795 .. doxygenfunction:: simgrid::s4u::Activity::start
1796 .. doxygenfunction:: simgrid::s4u::Activity::cancel
1797 .. doxygenfunction:: simgrid::s4u::Activity::test
1798 .. doxygenfunction:: simgrid::s4u::Activity::wait
1799 .. doxygenfunction:: simgrid::s4u::Activity::wait_for
1800 .. doxygenfunction:: simgrid::s4u::Activity::wait_until(double time_limit)
1801 .. doxygenfunction:: simgrid::s4u::Activity::vetoable_start()
1803 Suspending and resuming an activity
1804 -----------------------------------
1810 .. doxygenfunction:: simgrid::s4u::Activity::suspend
1811 .. doxygenfunction:: simgrid::s4u::Activity::resume
1812 .. doxygenfunction:: simgrid::s4u::Activity::is_suspended
1820 .. doxygenclass:: simgrid::s4u::Comm
1831 #include <simgrid/s4u/Comm.hpp>
1833 .. doxygentypedef:: CommPtr
1835 .. group-tab:: Python
1839 from simgrid import Comm
1841 .. autoclass:: simgrid.Comm
1847 #include <simgrid/comm.h>
1849 .. doxygentypedef:: sg_comm_t
1850 .. doxygentypedef:: const_sg_comm_t
1859 .. doxygenfunction:: simgrid::s4u::Comm::get_dst_data_size() const
1860 .. doxygenfunction:: simgrid::s4u::Comm::get_mailbox() const
1861 .. doxygenfunction:: simgrid::s4u::Comm::get_sender() const
1862 .. doxygenfunction:: simgrid::s4u::Comm::set_dst_data(void **buff)
1863 .. doxygenfunction:: simgrid::s4u::Comm::set_dst_data(void **buff, size_t size)
1864 .. doxygenfunction:: simgrid::s4u::Comm::detach()
1865 .. doxygenfunction:: simgrid::s4u::Comm::detach(void(*clean_function)(void *))
1866 .. doxygenfunction:: simgrid::s4u::Comm::set_payload_size(double bytes)
1867 .. doxygenfunction:: simgrid::s4u::Comm::set_rate(double rate)
1868 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data(void *buff)
1869 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data(void *buff, size_t size)
1870 .. doxygenfunction:: simgrid::s4u::Comm::set_src_data_size(size_t size)
1875 Most communications are created using :ref:`s4u_mailbox`, but you can
1876 also start direct communications as shown below.
1882 .. doxygenfunction:: simgrid::s4u::Comm::sendto
1883 .. doxygenfunction:: simgrid::s4u::Comm::sendto_init
1884 .. doxygenfunction:: simgrid::s4u::Comm::sendto_async
1886 .. doxygenfunction:: simgrid::s4u::Comm::cancel
1887 .. doxygenfunction:: simgrid::s4u::Comm::start
1888 .. doxygenfunction:: simgrid::s4u::Comm::test
1889 .. doxygenfunction:: simgrid::s4u::Comm::test_any(const std::vector< CommPtr >& comms)
1890 .. doxygenfunction:: simgrid::s4u::Comm::wait
1891 .. doxygenfunction:: simgrid::s4u::Comm::wait_all(const std::vector< CommPtr >& comms)
1892 .. doxygenfunction:: simgrid::s4u::Comm::wait_all_for(const std::vector< CommPtr >& comms, double timeout)
1893 .. doxygenfunction:: simgrid::s4u::Comm::wait_any(const std::vector< CommPtr >& comms)
1894 .. doxygenfunction:: simgrid::s4u::Comm::wait_any_for(const std::vector< CommPtr >& comms, double timeout)
1895 .. doxygenfunction:: simgrid::s4u::Comm::wait_for
1897 .. group-tab:: Python
1899 .. automethod:: simgrid.Comm.test
1900 .. automethod:: simgrid.Comm.wait
1901 .. automethod:: simgrid.Comm.wait_all
1902 .. automethod:: simgrid.Comm.wait_any
1911 .. doxygenvariable:: simgrid::s4u::Comm::on_completion
1912 .. doxygenvariable:: simgrid::s4u::Comm::on_start
1920 .. doxygenclass:: simgrid::s4u::Exec
1931 #include <simgrid/s4u/Exec.hpp>
1933 .. doxygentypedef:: ExecPtr
1935 .. group-tab:: Python
1939 from simgrid import Exec
1941 .. autoclass:: simgrid.Exec
1947 #include <simgrid/exec.h>
1949 .. doxygentypedef:: sg_exec_t
1950 .. doxygentypedef:: const_sg_exec_t
1959 .. doxygenfunction:: simgrid::s4u::Exec::get_cost() const
1960 .. doxygenfunction:: simgrid::s4u::Exec::get_finish_time() const
1961 .. doxygenfunction:: simgrid::s4u::Exec::get_host() const
1962 .. doxygenfunction:: simgrid::s4u::Exec::get_host_number() const
1963 .. cpp:function:: double Exec::get_remaining()
1965 On sequential executions, returns the amount of flops that remain to be done;
1966 This cannot be used on parallel executions.
1968 .. doxygenfunction:: simgrid::s4u::Exec::get_remaining_ratio
1969 .. doxygenfunction:: simgrid::s4u::Exec::get_start_time() const
1970 .. doxygenfunction:: simgrid::s4u::Exec::set_bound(double bound)
1971 .. doxygenfunction:: simgrid::s4u::Exec::set_host
1972 .. doxygenfunction:: simgrid::s4u::Exec::set_priority(double priority)
1974 .. group-tab:: Python
1976 .. autoattribute:: simgrid.Exec.host
1977 .. autoattribute:: simgrid.Exec.remaining
1978 .. autoattribute:: simgrid.Exec.remaining_ratio
1982 .. doxygenfunction:: sg_exec_set_bound(sg_exec_t exec, double bound)
1983 .. doxygenfunction:: sg_exec_get_name(const_sg_exec_t exec)
1984 .. doxygenfunction:: sg_exec_set_name(sg_exec_t exec, const char* name)
1985 .. doxygenfunction:: sg_exec_set_host(sg_exec_t exec, sg_host_t new_host)
1986 .. doxygenfunction:: sg_exec_get_remaining(const_sg_exec_t exec)
1987 .. doxygenfunction:: sg_exec_get_remaining_ratio(const_sg_exec_t exec)
1996 .. doxygenfunction:: simgrid::s4u::Exec::cancel
1997 .. doxygenfunction:: simgrid::s4u::Exec::set_timeout(double timeout)
1998 .. doxygenfunction:: simgrid::s4u::Exec::start
1999 .. doxygenfunction:: simgrid::s4u::Exec::test
2000 .. doxygenfunction:: simgrid::s4u::Exec::wait
2001 .. doxygenfunction:: simgrid::s4u::Exec::wait_any(const std::vector< ExecPtr >& execs)
2002 .. doxygenfunction:: simgrid::s4u::Exec::wait_any_for(const std::vector< ExecPtr >& execs, double timeout)
2003 .. doxygenfunction:: simgrid::s4u::Exec::wait_for
2005 .. group-tab:: Python
2007 .. automethod:: simgrid.Exec.cancel
2008 .. automethod:: simgrid.Exec.start
2009 .. automethod:: simgrid.Exec.test
2010 .. automethod:: simgrid.Exec.wait
2014 .. doxygenfunction:: sg_exec_start(sg_exec_t exec)
2015 .. doxygenfunction:: sg_exec_cancel(sg_exec_t exec);
2016 .. doxygenfunction:: sg_exec_test(sg_exec_t exec);
2017 .. doxygenfunction:: sg_exec_wait(sg_exec_t exec);
2018 .. doxygenfunction:: sg_exec_wait_for(sg_exec_t exec, double timeout);
2019 .. doxygenfunction:: sg_exec_wait_any_for(sg_exec_t* execs, size_t count, double timeout);
2020 .. doxygenfunction:: sg_exec_wait_any(sg_exec_t* execs, size_t count);
2029 .. doxygenvariable:: simgrid::s4u::Exec::on_start
2030 .. doxygenvariable:: simgrid::s4u::Exec::on_completion
2038 .. doxygenclass:: simgrid::s4u::Io
2049 #include <simgrid/s4u/Io.hpp>
2051 .. doxygentypedef:: IoPtr
2060 .. doxygenfunction:: simgrid::s4u::Io::get_performed_ioops() const
2061 .. doxygenfunction:: simgrid::s4u::Io::get_remaining
2070 .. doxygenfunction:: simgrid::s4u::Io::cancel
2071 .. doxygenfunction:: simgrid::s4u::Io::start
2072 .. doxygenfunction:: simgrid::s4u::Io::test
2073 .. doxygenfunction:: simgrid::s4u::Io::wait
2074 .. doxygenfunction:: simgrid::s4u::Io::wait_for
2076 .. _API_s4u_Synchronizations:
2078 =======================
2079 Synchronization Objects
2080 =======================
2088 .. doxygenclass:: simgrid::s4u::Mutex
2099 #include <simgrid/s4u/Mutex.hpp>
2101 .. doxygentypedef:: MutexPtr
2103 .. doxygenfunction:: simgrid::s4u::Mutex::create()
2109 #include <simgrid/mutex.h>
2111 .. doxygentypedef:: sg_mutex_t
2112 .. cpp:type:: const s4u_Mutex* const_sg_mutex_t
2114 Pointer to a constant mutex object.
2116 .. doxygenfunction:: sg_mutex_init()
2117 .. doxygenfunction:: sg_mutex_destroy(const_sg_mutex_t mutex)
2126 .. doxygenfunction:: simgrid::s4u::Mutex::lock()
2127 .. doxygenfunction:: simgrid::s4u::Mutex::try_lock()
2128 .. doxygenfunction:: simgrid::s4u::Mutex::unlock()
2132 .. doxygenfunction:: sg_mutex_lock(sg_mutex_t mutex)
2133 .. doxygenfunction:: sg_mutex_try_lock(sg_mutex_t mutex)
2134 .. doxygenfunction:: sg_mutex_unlock(sg_mutex_t mutex)
2136 .. _API_s4u_Barrier:
2142 .. doxygenclass:: simgrid::s4u::Barrier
2150 #include <simgrid/s4u/Barrier.hpp>
2152 .. doxygentypedef:: BarrierPtr
2154 .. doxygenfunction:: simgrid::s4u::Barrier::Barrier(unsigned int expected_actors)
2155 .. doxygenfunction:: simgrid::s4u::Barrier::create(unsigned int expected_actors)
2156 .. doxygenfunction:: simgrid::s4u::Barrier::wait()
2162 #include <simgrid/barrier.hpp>
2164 .. doxygentypedef:: sg_bar_t
2165 .. cpp:type:: const s4u_Barrier* const_sg_bar_t
2167 Pointer to a constant barrier object.
2169 .. doxygenfunction:: sg_barrier_init(unsigned int count)
2170 .. doxygenfunction:: sg_barrier_destroy(const_sg_bar_t bar)
2171 .. doxygenfunction:: sg_barrier_wait(sg_bar_t bar)
2174 .. _API_s4u_ConditionVariable:
2176 ==========================
2177 Condition variable
2178 ==========================
2180 .. doxygenclass:: simgrid::s4u::ConditionVariable
2191 #include <simgrid/s4u/ConditionVariable.hpp>
2193 .. doxygentypedef:: ConditionVariablePtr
2195 .. doxygenfunction:: simgrid::s4u::ConditionVariable::create()
2201 #include <simgrid/cond.h>
2203 .. doxygentypedef:: sg_cond_t
2204 .. doxygentypedef:: const_sg_cond_t
2205 .. doxygenfunction:: sg_cond_init
2206 .. doxygenfunction:: sg_cond_destroy
2208 Waiting and notifying
2209 ---------------------
2215 .. doxygenfunction:: simgrid::s4u::ConditionVariable::notify_all()
2216 .. doxygenfunction:: simgrid::s4u::ConditionVariable::notify_one()
2217 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(s4u::MutexPtr lock)
2218 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(const std::unique_lock< s4u::Mutex > &lock)
2219 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait(const std::unique_lock< Mutex > &lock, P pred)
2220 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, double duration)
2221 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, double duration, P pred)
2222 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, std::chrono::duration< Rep, Period > duration)
2223 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_for(const std::unique_lock< s4u::Mutex > &lock, std::chrono::duration< Rep, Period > duration, P pred)
2224 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, const SimulationTimePoint< Duration > &timeout_time)
2225 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, const SimulationTimePoint< Duration > &timeout_time, P pred)
2226 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, double timeout_time)
2227 .. doxygenfunction:: simgrid::s4u::ConditionVariable::wait_until(const std::unique_lock< s4u::Mutex > &lock, double timeout_time, P pred)
2231 .. doxygenfunction:: sg_cond_notify_all
2232 .. doxygenfunction:: sg_cond_notify_one
2233 .. doxygenfunction:: sg_cond_wait
2234 .. doxygenfunction:: sg_cond_wait_for
2236 .. _API_s4u_Semaphore:
2242 .. doxygenclass:: simgrid::s4u::Semaphore
2254 #include <simgrid/s4u/Semaphore.hpp>
2256 .. doxygentypedef:: SemaphorePtr
2257 .. doxygenfunction:: simgrid::s4u::Semaphore::create(unsigned int initial_capacity)
2263 #include <simgrid/semaphore.h>
2265 .. doxygentypedef:: sg_sem_t
2266 .. cpp:type:: const s4u_Semaphore* const_sg_sem_t
2268 Pointer to a constant semaphore object.
2270 .. doxygenfunction:: sg_sem_init(int initial_value)
2271 .. doxygenfunction:: sg_sem_destroy(const_sg_sem_t sem)
2280 .. doxygenfunction:: simgrid::s4u::Semaphore::acquire()
2281 .. doxygenfunction:: simgrid::s4u::Semaphore::acquire_timeout(double timeout)
2282 .. doxygenfunction:: simgrid::s4u::Semaphore::get_capacity() const
2283 .. doxygenfunction:: simgrid::s4u::Semaphore::release()
2284 .. doxygenfunction:: simgrid::s4u::Semaphore::would_block() const
2288 .. doxygenfunction:: sg_sem_acquire(sg_sem_t sem)
2289 .. doxygenfunction:: sg_sem_acquire_timeout(sg_sem_t sem, double timeout)
2290 .. doxygenfunction:: sg_sem_get_capacity(const_sg_sem_t sem)
2291 .. doxygenfunction:: sg_sem_release(sg_sem_t sem)
2292 .. doxygenfunction:: sg_sem_would_block(const_sg_sem_t sem)