1 /* Copyright (c) 2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_S4U_MESSAGEQUEUE_HPP
7 #define SIMGRID_S4U_MESSAGEQUEUE_HPP
9 #include <simgrid/forward.h>
10 #include <simgrid/s4u/Mess.hpp>
11 #include <smpi/forward.hpp>
15 namespace simgrid::s4u {
17 class XBT_PUBLIC MessageQueue {
20 friend kernel::activity::MessageQueueImpl;
23 kernel::activity::MessageQueueImpl* const pimpl_;
25 explicit MessageQueue(kernel::activity::MessageQueueImpl * mqueue) : pimpl_(mqueue) {}
26 ~MessageQueue() = default;
29 kernel::activity::MessageQueueImpl* get_impl() const { return pimpl_; }
32 /** @brief Retrieves the name of that message queue as a C++ string */
33 const std::string& get_name() const;
34 /** @brief Retrieves the name of that message queue as a C string */
35 const char* get_cname() const;
37 /** \static Retrieve the message queye associated to the given name. Message queues are created on demand. */
38 static MessageQueue* by_name(const std::string& name);
40 /** Returns whether the message queue contains queued messages */
43 /* Returns the number of queued messages */
46 /** Gets the first element in the queue (without dequeuing it), or nullptr if none is there */
47 kernel::activity::MessImplPtr front() const;
49 /** Creates (but don't start) a data transmission to that message queue */
51 /** Creates (but don't start) a data transmission to that message queue.
53 * Please note that if you send a pointer to some data, you must ensure that your data remains live until
54 * consumption, or the receiver will get a pointer to a garbled memory area.
56 MessPtr put_init(void* payload);
57 /** Creates and start a data transmission to that mailbox.
59 * Please note that if you send a pointer to some data, you must ensure that your data remains live until
60 * consumption, or the receiver will get a pointer to a garbled memory area.
62 MessPtr put_async(void* payload);
64 /** Blocking data transmission.
66 * Please note that if you send a pointer to some data, you must ensure that your data remains live until
67 * consumption, or the receiver will get a pointer to a garbled memory area.
69 void put(void* payload);
70 /** Blocking data transmission with timeout */
71 void put(void* payload, double timeout);
73 /** Creates (but don't start) a data reception onto that message queue. */
75 /** Creates and start an async data reception to that message queue */
76 template <typename T> MessPtr get_async(T** data);
77 /** Creates and start an async data reception to that mailbox. Since the data location is not provided, you'll have to
78 * use Mess::get_payload once the messaging operation terminates */
81 /** Blocking data reception */
82 template <typename T> T* get();
83 template <typename T> std::unique_ptr<T> get_unique() { return std::unique_ptr<T>(get<T>()); }
85 /** Blocking data reception with timeout */
86 template <typename T> T* get(double timeout);
87 template <typename T> std::unique_ptr<T> get_unique(double timeout) { return std::unique_ptr<T>(get<T>(timeout)); }
90 template <typename T> MessPtr MessageQueue::get_async(T** data)
92 MessPtr res = get_init()->set_dst_data(reinterpret_cast<void**>(data), sizeof(void*));
97 template <typename T> T* MessageQueue::get()
100 get_async<T>(&res)->wait();
104 template <typename T> T* MessageQueue::get(double timeout)
107 get_async<T>(&res)->wait_for(timeout);
110 } // namespace simgrid::s4u
112 #endif /* SIMGRID_S4U_MESSAGEQUEUE_HPP */