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>
18 /** @brief Communication async
20 * Represents all asynchronous communications, that you can test or wait onto.
22 XBT_PUBLIC_CLASS Comm : public Activity
24 Comm() : Activity() {}
28 /*! take a range of s4u::Comm* (last excluded) and return when one of them is finished. The return value is an
29 * iterator on the finished Comms. */
30 template <class I> static I wait_any(I first, I last)
32 // Map to dynar<Synchro*>:
33 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), NULL);
34 for (I iter = first; iter != last; iter++) {
36 if (comm.state_ == inited)
38 xbt_assert(comm.state_ == started);
39 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_);
41 // Call the underlying simcall:
42 int idx = simcall_comm_waitany(comms, -1);
43 xbt_dynar_free(&comms);
47 // Lift the index to the corresponding iterator:
48 auto res = std::next(first, idx);
49 (*res)->state_ = finished;
52 /*! Same as wait_any, but with a timeout. If wait_any_for return because of the timeout last is returned.*/
53 template <class I> static I wait_any_for(I first, I last, double timeout)
55 // Map to dynar<Synchro*>:
56 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), NULL);
57 for (I iter = first; iter != last; iter++) {
59 if (comm.state_ == inited)
61 xbt_assert(comm.state_ == started);
62 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_);
64 // Call the underlying simcall:
65 int idx = simcall_comm_waitany(comms, timeout);
66 xbt_dynar_free(&comms);
70 // Lift the index to the corresponding iterator:
71 auto res = std::next(first, idx);
72 (*res)->state_ = finished;
75 /** Creates (but don't start) an async send to the mailbox @p dest */
76 static Comm& send_init(MailboxPtr dest);
77 /** Creates and start an async send to the mailbox @p dest */
78 static Comm& send_async(MailboxPtr dest, void* data, int simulatedByteAmount);
79 /** Creates (but don't start) an async recv onto the mailbox @p from */
80 static Comm& recv_init(MailboxPtr from);
81 /** Creates and start an async recv to the mailbox @p from */
82 static Comm& recv_async(MailboxPtr from, void** data);
84 void start() override;
86 void wait(double timeout) override;
88 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
89 void setRate(double rate);
91 /** Specify the data to send */
92 void setSrcData(void* buff);
93 /** Specify the size of the data to send */
94 void setSrcDataSize(size_t size);
95 /** Specify the data to send and its size */
96 void setSrcData(void* buff, size_t size);
98 /** Specify where to receive the data */
99 void setDstData(void** buff);
100 /** Specify the buffer in which the data should be received */
101 void setDstData(void** buff, size_t size);
102 /** Retrieve the size of the received data */
103 size_t getDstDataSize();
109 void* dstBuff_ = nullptr;
110 size_t dstBuffSize_ = 0;
111 void* srcBuff_ = nullptr;
112 size_t srcBuffSize_ = sizeof(void*);
114 /* FIXME: expose these elements in the API */
116 int (*matchFunction_)(void*, void*, smx_activity_t) = nullptr;
117 void (*cleanFunction_)(void*) = nullptr;
118 void (*copyDataFunction_)(smx_activity_t, void*, size_t) = nullptr;
120 smx_actor_t sender_ = nullptr;
121 smx_actor_t receiver_ = nullptr;
122 MailboxPtr mailbox_ = nullptr;
125 } // namespace simgrid::s4u
127 #endif /* SIMGRID_S4U_COMM_HPP */