1 /* Copyright (c) 2006-2018. 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_COMM_HPP
7 #define SIMGRID_S4U_COMM_HPP
11 #include <simgrid/forward.h>
12 #include <simgrid/s4u/Activity.hpp>
13 #include <simgrid/s4u/Mailbox.hpp> // DEPRECATED 3.20
14 #include <simgrid/s4u/forward.hpp>
20 /** @brief Communication async
22 * Represents all asynchronous communications, that you can test or wait onto.
24 class XBT_PUBLIC Comm : public Activity {
25 Comm() : Activity() {}
27 friend XBT_PUBLIC void intrusive_ptr_release(simgrid::s4u::Comm * c);
28 friend XBT_PUBLIC void intrusive_ptr_add_ref(simgrid::s4u::Comm * c);
29 friend Mailbox; // Factory of comms
33 /*! take a vector s4u::CommPtr and return when one of them is finished.
34 * The return value is the rank of the first finished CommPtr. */
35 static int wait_any(std::vector<CommPtr> * comms) { return wait_any_for(comms, -1); }
36 /*! Same as wait_any, but with a timeout. If the timeout occurs, parameter last is returned.*/
37 static int wait_any_for(std::vector<CommPtr> * comms_in, double timeout)
39 // Map to dynar<Synchro*>:
40 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), [](void*ptr){
41 intrusive_ptr_release(*(simgrid::kernel::activity::ActivityImpl**)ptr);
43 for (auto const& comm : *comms_in) {
44 if (comm->state_ == inited)
46 xbt_assert(comm->state_ == started);
47 simgrid::kernel::activity::ActivityImpl* ptr = comm->pimpl_.get();
48 intrusive_ptr_add_ref(ptr);
49 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, ptr);
51 // Call the underlying simcall:
52 int idx = simcall_comm_waitany(comms, timeout);
53 xbt_dynar_free(&comms);
57 /*! take a vector s4u::CommPtr and return when all of them is finished. */
58 static void wait_all(std::vector<CommPtr> * comms)
60 // TODO: this should be a simcall or something
61 // TODO: we are missing a version with timeout
62 for (CommPtr comm : *comms) {
66 /*! take a vector s4u::CommPtr and return the rank of the first finished one (or -1 if none is done). */
67 static int test_any(std::vector<CommPtr> * comms);
69 /** Creates (but don't start) an async send to the mailbox @p dest */
70 XBT_ATTRIB_DEPRECATED_v320("Use Mailbox::put_init(): v3.20 will turn this warning into an error.") static CommPtr
71 send_init(MailboxPtr dest)
73 return dest->put_init();
75 /** Creates (but don't start) an async send to the mailbox @p dest */
76 XBT_ATTRIB_DEPRECATED_v320("Use Mailbox::put_init(): v3.20 will turn this warning into an error.") static CommPtr
77 send_init(MailboxPtr dest, void* data, int simulatedByteAmount)
79 return dest->put_init(data, simulatedByteAmount);
81 /** Creates and start an async send to the mailbox @p dest */
82 XBT_ATTRIB_DEPRECATED_v320("Use Mailbox::put_async(): v3.20 will turn this warning into an error.") static CommPtr
83 send_async(MailboxPtr dest, void* data, int simulatedByteAmount)
85 return dest->put_async(data, simulatedByteAmount);
87 /** Creates (but don't start) an async recv onto the mailbox @p from */
88 XBT_ATTRIB_DEPRECATED_v320("Use Mailbox::get_init(): v3.20 will turn this warning into an error.") static CommPtr
89 recv_init(MailboxPtr from)
91 return from->get_init();
93 /** Creates and start an async recv to the mailbox @p from */
94 XBT_ATTRIB_DEPRECATED_v320("Use Mailbox::get_async(): v3.20 will turn this warning into an error.") static CommPtr
95 recv_async(MailboxPtr from, void** data)
97 return from->get_async(data);
100 Activity* start() override;
101 Activity* wait() override;
102 Activity* wait(double timeout) override;
104 /** Start the comm, and ignore its result. It can be completely forgotten after that. */
106 /** Start the comm, and ignore its result. It can be completely forgotten after that. */
107 Activity* detach(void (*cleanFunction)(void*))
109 cleanFunction_ = cleanFunction;
113 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
114 Activity* setRate(double rate);
116 /** Specify the data to send */
117 Activity* setSrcData(void* buff);
118 /** Specify the size of the data to send */
119 Activity* setSrcDataSize(size_t size);
120 /** Specify the data to send and its size */
121 Activity* setSrcData(void* buff, size_t size);
123 /** Specify where to receive the data */
124 Activity* setDstData(void** buff);
125 /** Specify the buffer in which the data should be received */
126 Activity* setDstData(void** buff, size_t size);
127 /** Retrieve the size of the received data */
128 size_t getDstDataSize();
133 /** Retrieve the mailbox on which this comm acts */
134 MailboxPtr getMailbox();
138 void* dstBuff_ = nullptr;
139 size_t dstBuffSize_ = 0;
140 void* srcBuff_ = nullptr;
141 size_t srcBuffSize_ = sizeof(void*);
143 /* FIXME: expose these elements in the API */
145 int (*matchFunction_)(void*, void*, simgrid::kernel::activity::CommImpl*) = nullptr;
146 void (*cleanFunction_)(void*) = nullptr;
147 void (*copyDataFunction_)(smx_activity_t, void*, size_t) = nullptr;
149 smx_actor_t sender_ = nullptr;
150 smx_actor_t receiver_ = nullptr;
151 MailboxPtr mailbox_ = nullptr;
153 std::atomic_int_fast32_t refcount_{0};
156 } // namespace simgrid::s4u
158 #endif /* SIMGRID_S4U_COMM_HPP */