1 /* Copyright (c) 2006-2019. 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 #include "src/msg/msg_private.hpp"
9 #include "simgrid/s4u/Comm.hpp"
10 #include "simgrid/s4u/Mailbox.hpp"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_comm, s4u_activity, "S4U asynchronous communications");
16 simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> s4u::Comm::on_sender_start;
17 simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> s4u::Comm::on_receiver_start;
18 simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> s4u::Comm::on_completion;
22 if (state_ == State::STARTED && not detached_ && (pimpl_ == nullptr || pimpl_->state_ == SIMIX_RUNNING)) {
23 XBT_INFO("Comm %p freed before its completion. Detached: %d, State: %d", this, detached_, (int)state_);
24 if (pimpl_ != nullptr)
25 XBT_INFO("pimpl_->state: %d", pimpl_->state_);
27 XBT_INFO("pimpl_ is null");
28 xbt_backtrace_display_current();
32 int Comm::wait_any_for(std::vector<CommPtr>* comms, double timeout)
34 std::unique_ptr<simgrid::kernel::activity::CommImpl* []> rcomms(
35 new simgrid::kernel::activity::CommImpl*[comms->size()]);
36 std::transform(begin(*comms), end(*comms), rcomms.get(), [](const CommPtr& comm) {
37 return static_cast<simgrid::kernel::activity::CommImpl*>(comm->pimpl_.get());
39 return simcall_comm_waitany(rcomms.get(), comms->size(), timeout);
42 void Comm::wait_all(std::vector<CommPtr>* comms)
44 // TODO: this should be a simcall or something
45 // TODO: we are missing a version with timeout
46 for (CommPtr comm : *comms)
50 Comm* Comm::set_rate(double rate)
52 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
58 Comm* Comm::set_src_data(void* buff)
60 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
62 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
66 Comm* Comm::set_src_data_size(size_t size)
68 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
70 src_buff_size_ = size;
73 Comm* Comm::set_src_data(void* buff, size_t size)
75 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
78 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
80 src_buff_size_ = size;
83 Comm* Comm::set_dst_data(void** buff)
85 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
87 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
91 size_t Comm::get_dst_data_size()
93 xbt_assert(state_ == State::FINISHED, "You cannot use %s before your communication terminated", __FUNCTION__);
94 return dst_buff_size_;
96 Comm* Comm::set_dst_data(void** buff, size_t size)
98 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
101 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
103 dst_buff_size_ = size;
109 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
112 if (src_buff_ != nullptr) { // Sender side
113 on_sender_start(Actor::self());
114 pimpl_ = simcall_comm_isend(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
115 clean_fun_, copy_data_function_, user_data_, detached_);
116 } else if (dst_buff_ != nullptr) { // Receiver side
117 xbt_assert(not detached_, "Receive cannot be detached");
118 on_receiver_start(Actor::self());
119 pimpl_ = simcall_comm_irecv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_,
120 copy_data_function_, user_data_, rate_);
123 xbt_die("Cannot start a communication before specifying whether we are the sender or the receiver");
125 state_ = State::STARTED;
129 /** @brief Block the calling actor until the communication is finished */
132 return this->wait_for(-1);
135 /** @brief Block the calling actor until the communication is finished, or until timeout
137 * On timeout, an exception is thrown.
139 * @param timeout the amount of seconds to wait for the comm termination.
140 * Negative values denote infinite wait times. 0 as a timeout returns immediately. */
141 Comm* Comm::wait_for(double timeout)
144 case State::FINISHED:
147 case State::INITED: // It's not started yet. Do it in one simcall
148 if (src_buff_ != nullptr) {
149 on_sender_start(Actor::self());
150 simcall_comm_send(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
151 copy_data_function_, user_data_, timeout);
154 on_receiver_start(Actor::self());
155 simcall_comm_recv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_, copy_data_function_,
156 user_data_, timeout, rate_);
158 state_ = State::FINISHED;
162 simcall_comm_wait(pimpl_, timeout);
163 on_completion(Actor::self());
164 state_ = State::FINISHED;
172 int Comm::test_any(std::vector<CommPtr>* comms)
174 std::unique_ptr<simgrid::kernel::activity::CommImpl* []> rcomms(
175 new simgrid::kernel::activity::CommImpl*[comms->size()]);
176 std::transform(begin(*comms), end(*comms), rcomms.get(), [](const CommPtr& comm) {
177 return static_cast<simgrid::kernel::activity::CommImpl*>(comm->pimpl_.get());
179 return simcall_comm_testany(rcomms.get(), comms->size());
184 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
186 xbt_assert(src_buff_ != nullptr && src_buff_size_ != 0, "You can only detach sends, not recvs");
193 simgrid::simix::simcall([this] { static_cast<kernel::activity::CommImpl*>(pimpl_.get())->cancel(); });
194 state_ = State::CANCELED;
200 xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
202 if (state_ == State::FINISHED)
205 if (state_ == State::INITED)
208 if (simcall_comm_test(pimpl_)) {
209 state_ = State::FINISHED;
215 MailboxPtr Comm::get_mailbox()
220 void intrusive_ptr_release(simgrid::s4u::Comm* c)
222 if (c->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
223 std::atomic_thread_fence(std::memory_order_acquire);
227 void intrusive_ptr_add_ref(simgrid::s4u::Comm* c)
229 c->refcount_.fetch_add(1, std::memory_order_relaxed);
232 } // namespace simgrid