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>
16 /** @brief Communication async
18 * Represents all asynchronous communications, that you can test or wait onto.
20 XBT_PUBLIC_CLASS Comm : public Activity
22 Comm() : Activity() {}
24 friend void intrusive_ptr_release(simgrid::s4u::Comm * c);
25 friend void intrusive_ptr_add_ref(simgrid::s4u::Comm * c);
29 /*! take a range of s4u::Comm* (last excluded) and return when one of them is finished. The return value is an
30 * iterator on the finished Comms. */
31 template <class I> static 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*), [](void*ptr){
35 intrusive_ptr_release((simgrid::kernel::activity::ActivityImpl*)ptr);
37 for (I iter = first; iter != last; iter++) {
39 if (comm.state_ == inited)
41 xbt_assert(comm.state_ == started);
42 intrusive_ptr_add_ref(comm.pimpl_.get());
43 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_.get());
45 // Call the underlying simcall:
46 int idx = simcall_comm_waitany(comms, -1);
47 xbt_dynar_free(&comms);
51 // Lift the index to the corresponding iterator:
52 auto res = std::next(first, idx);
53 (*res)->state_ = finished;
56 /*! Same as wait_any, but with a timeout. If wait_any_for return because of the timeout last is returned.*/
57 template <class I> static I wait_any_for(I first, I last, double timeout)
59 // Map to dynar<Synchro*>:
60 xbt_dynar_t comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), [](void*ptr){
61 intrusive_ptr_release((simgrid::kernel::activity::ActivityImpl*)ptr);
63 for (I iter = first; iter != last; iter++) {
65 if (comm.state_ == inited)
67 xbt_assert(comm.state_ == started);
68 intrusive_ptr_add_ref(comm.pimpl_.get());
69 xbt_dynar_push_as(comms, simgrid::kernel::activity::ActivityImpl*, comm.pimpl_.get());
71 // Call the underlying simcall:
72 int idx = simcall_comm_waitany(comms, timeout);
73 xbt_dynar_free(&comms);
77 // Lift the index to the corresponding iterator:
78 auto res = std::next(first, idx);
79 (*res)->state_ = finished;
82 /** Creates (but don't start) an async send to the mailbox @p dest */
83 static CommPtr send_init(MailboxPtr dest);
84 /** Creates and start an async send to the mailbox @p dest */
85 static CommPtr send_async(MailboxPtr dest, void* data, int simulatedByteAmount);
86 /** Creates (but don't start) an async recv onto the mailbox @p from */
87 static CommPtr recv_init(MailboxPtr from);
88 /** Creates and start an async recv to the mailbox @p from */
89 static CommPtr recv_async(MailboxPtr from, void** data);
90 /** Creates and start a detached send to the mailbox @p dest
91 * TODO: make it possible to detach an already created comm */
92 static void send_detached(MailboxPtr dest, void* data, int simulatedSize);
94 void start() override;
96 void wait(double timeout) override;
98 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
99 void setRate(double rate);
101 /** Specify the data to send */
102 void setSrcData(void* buff);
103 /** Specify the size of the data to send */
104 void setSrcDataSize(size_t size);
105 /** Specify the data to send and its size */
106 void setSrcData(void* buff, size_t size);
108 /** Specify where to receive the data */
109 void setDstData(void** buff);
110 /** Specify the buffer in which the data should be received */
111 void setDstData(void** buff, size_t size);
112 /** Retrieve the size of the received data */
113 size_t getDstDataSize();
120 void* dstBuff_ = nullptr;
121 size_t dstBuffSize_ = 0;
122 void* srcBuff_ = nullptr;
123 size_t srcBuffSize_ = sizeof(void*);
125 /* FIXME: expose these elements in the API */
127 int (*matchFunction_)(void*, void*, smx_activity_t) = nullptr;
128 void (*cleanFunction_)(void*) = nullptr;
129 void (*copyDataFunction_)(smx_activity_t, void*, size_t) = nullptr;
131 smx_actor_t sender_ = nullptr;
132 smx_actor_t receiver_ = nullptr;
133 MailboxPtr mailbox_ = nullptr;
135 std::atomic_int_fast32_t refcount_{0};
138 } // namespace simgrid::s4u
140 #endif /* SIMGRID_S4U_COMM_HPP */