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/s4u/Activity.hpp>
12 #include <simgrid/s4u/forward.hpp>
13 #include <simgrid/forward.h>
20 /** @brief Communication async
22 * Represents all asynchronous communications, that you can test or wait onto.
24 XBT_PUBLIC_CLASS Comm : public Activity {
25 Comm() : Activity() {}
29 /*! take a range of s4u::Comm* (last excluded) and return when one of them is finished. The return value is an iterator on the finished Comms. */
30 template<class I> static
31 I wait_any(I first, I last)
33 // Map to dynar<Synchro*>:
34 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), NULL);
35 for(I iter = first; iter != last; iter++) {
37 if (comm.state_ == inited)
39 xbt_assert(comm.state_ == started);
40 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_);
42 // Call the underlying simcall:
43 int idx = simcall_comm_waitany(comms, -1);
44 xbt_dynar_free(&comms);
48 // Lift the index to the corresponding iterator:
49 auto res = std::next(first, idx);
50 (*res)->state_ = finished;
53 /*! Same as wait_any, but with a timeout. If wait_any_for return because of the timeout last is returned.*/
54 template<class I> static
55 I wait_any_for(I first, I last, double timeout)
57 // Map to dynar<Synchro*>:
58 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), NULL);
59 for(I iter = first; iter != last; iter++) {
61 if (comm.state_ == inited)
63 xbt_assert(comm.state_ == started);
64 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_);
66 // Call the underlying simcall:
67 int idx = simcall_comm_waitany(comms, timeout);
68 xbt_dynar_free(&comms);
72 // Lift the index to the corresponding iterator:
73 auto res = std::next(first, idx);
74 (*res)->state_ = finished;
77 /** Creates (but don't start) an async send to the mailbox @p dest */
78 static Comm &send_init(MailboxPtr dest);
79 /** Creates and start an async send to the mailbox @p dest */
80 static Comm &send_async(MailboxPtr dest, void *data, int simulatedByteAmount);
81 /** Creates (but don't start) an async recv onto the mailbox @p from */
82 static Comm &recv_init(MailboxPtr from);
83 /** Creates and start an async recv to the mailbox @p from */
84 static Comm &recv_async(MailboxPtr from, void **data);
86 void start() override;
88 void wait(double timeout) override;
90 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
91 void setRate(double rate);
93 /** Specify the data to send */
94 void setSrcData(void * buff);
95 /** Specify the size of the data to send */
96 void setSrcDataSize(size_t size);
97 /** Specify the data to send and its size */
98 void setSrcData(void * buff, size_t size);
100 /** Specify where to receive the data */
101 void setDstData(void ** buff);
102 /** Specify the buffer in which the data should be received */
103 void setDstData(void ** buff, size_t size);
104 /** Retrieve the size of the received data */
105 size_t getDstDataSize();
112 void *dstBuff_ = nullptr;
113 size_t dstBuffSize_ = 0;
114 void *srcBuff_ = nullptr;
115 size_t srcBuffSize_ = sizeof(void*);
117 /* FIXME: expose these elements in the API */
119 int (*matchFunction_)(void *, void *, smx_activity_t) = nullptr;
120 void (*cleanFunction_)(void *) = nullptr;
121 void (*copyDataFunction_)(smx_activity_t, void*, size_t) = nullptr;
123 smx_actor_t sender_ = nullptr;
124 smx_actor_t receiver_ = nullptr;
125 MailboxPtr mailbox_ = nullptr;
128 }} // namespace simgrid::s4u
130 #endif /* SIMGRID_S4U_COMM_HPP */