1 /* Copyright (c) 2006-2016. 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/forward.hpp>
19 /** @brief Communication async
21 * Represents all asynchronous communications, that you can test or wait onto.
23 XBT_PUBLIC_CLASS Comm : public Activity
25 Comm() : Activity() {}
27 friend void intrusive_ptr_release(simgrid::s4u::Comm * c);
28 friend void intrusive_ptr_add_ref(simgrid::s4u::Comm * c);
32 /*! take a range of s4u::CommPtr (last excluded) and return when one of them is finished. The return value is an
33 * iterator on the finished Comms. */
34 static int wait_any(std::vector<CommPtr> * comms) { return wait_any_for(comms, -1); }
35 /*! Same as wait_any, but with a timeout. If the timeout occurs, parameter last is returned.*/
36 static int wait_any_for(std::vector<CommPtr> * comms_in, double timeout)
38 // Map to dynar<Synchro*>:
39 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), [](void*ptr){
40 intrusive_ptr_release(*(simgrid::kernel::activity::ActivityImpl**)ptr);
42 for (auto comm : *comms_in) {
43 if (comm->state_ == inited)
45 xbt_assert(comm->state_ == started);
46 simgrid::kernel::activity::ActivityImpl* ptr = comm->pimpl_.get();
47 intrusive_ptr_add_ref(ptr);
48 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, ptr);
50 // Call the underlying simcall:
51 int idx = simcall_comm_waitany(comms, timeout);
52 xbt_dynar_free(&comms);
55 /** Creates (but don't start) an async send to the mailbox @p dest */
56 static CommPtr send_init(MailboxPtr dest);
57 /** Creates and start an async send to the mailbox @p dest */
58 static CommPtr send_async(MailboxPtr dest, void* data, int simulatedByteAmount);
59 /** Creates (but don't start) an async recv onto the mailbox @p from */
60 static CommPtr recv_init(MailboxPtr from);
61 /** Creates and start an async recv to the mailbox @p from */
62 static CommPtr recv_async(MailboxPtr from, void** data);
63 /** Creates and start a detached send to the mailbox @p dest
64 * TODO: make it possible to detach an already created comm */
65 static void send_detached(MailboxPtr dest, void* data, int simulatedSize);
67 void start() override;
69 void wait(double timeout) override;
71 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
72 void setRate(double rate);
74 /** Specify the data to send */
75 void setSrcData(void* buff);
76 /** Specify the size of the data to send */
77 void setSrcDataSize(size_t size);
78 /** Specify the data to send and its size */
79 void setSrcData(void* buff, size_t size);
81 /** Specify where to receive the data */
82 void setDstData(void** buff);
83 /** Specify the buffer in which the data should be received */
84 void setDstData(void** buff, size_t size);
85 /** Retrieve the size of the received data */
86 size_t getDstDataSize();
93 void* dstBuff_ = nullptr;
94 size_t dstBuffSize_ = 0;
95 void* srcBuff_ = nullptr;
96 size_t srcBuffSize_ = sizeof(void*);
98 /* FIXME: expose these elements in the API */
100 int (*matchFunction_)(void*, void*, simgrid::kernel::activity::CommImpl*) = nullptr;
101 void (*cleanFunction_)(void*) = nullptr;
102 void (*copyDataFunction_)(smx_activity_t, void*, size_t) = nullptr;
104 smx_actor_t sender_ = nullptr;
105 smx_actor_t receiver_ = nullptr;
106 MailboxPtr mailbox_ = nullptr;
108 std::atomic_int_fast32_t refcount_{0};
111 } // namespace simgrid::s4u
113 #endif /* SIMGRID_S4U_COMM_HPP */