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
9 #include <simgrid/forward.h>
10 #include <simgrid/s4u/Activity.hpp>
17 /** @brief Communication async
19 * Represents all asynchronous communications, that you can test or wait onto.
21 class XBT_PUBLIC Comm : public Activity {
22 Comm() : Activity() {}
24 friend XBT_PUBLIC void intrusive_ptr_release(simgrid::s4u::Comm * c);
25 friend XBT_PUBLIC void intrusive_ptr_add_ref(simgrid::s4u::Comm * c);
26 friend simgrid::s4u::Mailbox; // Factory of comms
30 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_sender_start;
31 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_receiver_start;
32 static simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> on_completion;
34 /*! take a vector s4u::CommPtr and return when one of them is finished.
35 * The return value is the rank of the first finished CommPtr. */
36 static int wait_any(std::vector<CommPtr> * comms) { return wait_any_for(comms, -1); }
37 /*! Same as wait_any, but with a timeout. If the timeout occurs, parameter last is returned.*/
38 static int wait_any_for(std::vector<CommPtr>* comms_in, double timeout);
40 /*! take a vector s4u::CommPtr and return when all of them is finished. */
41 static void wait_all(std::vector<CommPtr>* comms);
42 /*! take a vector s4u::CommPtr and return the rank of the first finished one (or -1 if none is done). */
43 static int test_any(std::vector<CommPtr> * comms);
45 Comm* start() override;
46 Comm* wait() override;
47 Comm* wait_for(double timeout) override;
50 /** Start the comm, and ignore its result. It can be completely forgotten after that. */
52 /** Start the comm, and ignore its result. It can be completely forgotten after that. */
53 Comm* detach(void (*clean_function)(void*))
55 clean_fun_ = clean_function;
59 /** Sets the maximal communication rate (in byte/sec). Must be done before start */
60 Comm* set_rate(double rate);
62 /** Specify the data to send.
64 * This is way will get actually copied over to the receiver.
65 * That's completely unrelated from the simulated size (given with @ref Activity::set_remaining()):
66 * you can send a short buffer in your simulator, that represents a very large message
67 * in the simulated world, or the opposite.
69 Comm* set_src_data(void* buff);
70 /** Specify the size of the data to send. Not to be mixed with @ref Activity::set_remaining()
72 * That's the size of the data to actually copy in the simulator (ie, the data passed with Activity::set_src_data()).
73 * That's completely unrelated from the simulated size (given with @ref Activity::set_remaining()):
74 * you can send a short buffer in your simulator, that represents a very large message
75 * in the simulated world, or the opposite.
77 Comm* set_src_data_size(size_t size);
78 /** Specify the data to send and its size. Don't mix the size with @ref Activity::set_remaining()
80 * This is way will get actually copied over to the receiver.
81 * That's completely unrelated from the simulated size (given with @ref Activity::set_remaining()):
82 * you can send a short buffer in your simulator, that represents a very large message
83 * in the simulated world, or the opposite.
85 Comm* set_src_data(void* buff, size_t size);
87 /** Specify where to receive the data.
89 * That's a buffer where the sent data will be copied */
90 Comm* set_dst_data(void** buff);
91 /** Specify the buffer in which the data should be received
93 * That's a buffer where the sent data will be copied */
94 Comm* set_dst_data(void** buff, size_t size);
95 /** Retrieve the size of the received data. Not to be mixed with @ref Activity::set_remaining() */
96 size_t get_dst_data_size();
98 Comm* cancel() override;
100 /** Retrieve the mailbox on which this comm acts */
101 MailboxPtr get_mailbox();
104 XBT_ATTRIB_DEPRECATED_v324("Please use Comm::wait_for()") void wait(double t) override { wait_for(t); }
105 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_rate()") Activity* setRate(double rate) { return set_rate(rate); }
106 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_src_data()") Activity* setSrcData(void* buff)
108 return set_src_data(buff);
110 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_src_data()") Activity* setSrcData(void* buff, size_t size)
112 return set_src_data(buff, size);
114 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_src_data_size()") Activity* setSrcDataSize(size_t size)
116 return set_src_data_size(size);
118 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_dst_data()") Activity* setDstData(void** buff)
120 return set_dst_data(buff);
122 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::set_dst_data()") Activity* setDstData(void** buff, size_t size)
124 return set_dst_data(buff, size);
126 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::get_dst_data_size()") size_t getDstDataSize()
128 return get_dst_data_size();
130 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::get_mailbox()") MailboxPtr getMailbox() { return get_mailbox(); }
135 void* dst_buff_ = nullptr;
136 size_t dst_buff_size_ = 0;
137 void* src_buff_ = nullptr;
138 size_t src_buff_size_ = sizeof(void*);
140 /* FIXME: expose these elements in the API */
142 int (*match_fun_)(void*, void*, simgrid::kernel::activity::CommImpl*) = nullptr;
143 void (*clean_fun_)(void*) = nullptr;
144 void (*copy_data_function_)(smx_activity_t, void*, size_t) = nullptr;
146 smx_actor_t sender_ = nullptr;
147 smx_actor_t receiver_ = nullptr;
148 MailboxPtr mailbox_ = nullptr;
150 std::atomic_int_fast32_t refcount_{0};
153 } // namespace simgrid
155 #endif /* SIMGRID_S4U_COMM_HPP */