1 /* Copyright (c) 2006-2021. 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/Exception.hpp"
10 #include "simgrid/s4u/Comm.hpp"
11 #include "simgrid/s4u/Mailbox.hpp"
13 #include <simgrid/comm.h>
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_comm, s4u_activity, "S4U asynchronous communications");
19 xbt::signal<void(Comm const&, bool is_sender)> Comm::on_start;
20 xbt::signal<void(Comm const&)> Comm::on_completion;
22 void Comm::complete(Activity::State state)
24 Activity::complete(state);
30 if (state_ == State::STARTED && not detached_ &&
31 (pimpl_ == nullptr || pimpl_->state_ == kernel::activity::State::RUNNING)) {
32 XBT_INFO("Comm %p freed before its completion. Did you forget to detach it? (state: %s)", this, get_state_str());
33 if (pimpl_ != nullptr)
34 XBT_INFO("pimpl_->state: %s", pimpl_->get_state_str());
36 XBT_INFO("pimpl_ is null");
37 xbt_backtrace_display_current();
41 int Comm::wait_any_for(const std::vector<CommPtr>* comms, double timeout)
43 std::vector<kernel::activity::CommImpl*> rcomms(comms->size());
44 std::transform(begin(*comms), end(*comms), begin(rcomms),
45 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
46 int changed_pos = simcall_comm_waitany(rcomms.data(), rcomms.size(), timeout);
47 if (changed_pos != -1)
48 comms->at(changed_pos)->complete(State::FINISHED);
52 void Comm::wait_all(const std::vector<CommPtr>* comms)
54 // TODO: this should be a simcall or something
55 // TODO: we are missing a version with timeout
56 for (CommPtr comm : *comms)
60 CommPtr Comm::set_rate(double rate)
62 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
68 CommPtr Comm::set_src_data(void* buff)
70 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
72 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
77 CommPtr Comm::set_src_data_size(size_t size)
79 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
81 src_buff_size_ = size;
85 CommPtr Comm::set_src_data(void* buff, size_t size)
87 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
90 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
92 src_buff_size_ = size;
96 CommPtr Comm::set_dst_data(void** buff)
98 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
100 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
104 void* Comm::get_dst_data()
109 size_t Comm::get_dst_data_size() const
111 return dst_buff_size_;
113 CommPtr Comm::set_dst_data(void** buff, size_t size)
115 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
118 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
120 dst_buff_size_ = size;
123 CommPtr Comm::set_payload_size(double bytes)
125 Activity::set_remaining(bytes);
129 CommPtr Comm::sendto_init(Host* from, Host* to)
131 CommPtr res(new Comm());
138 CommPtr Comm::sendto_async(Host* from, Host* to, double simulated_size_in_bytes)
140 auto res = Comm::sendto_init(from, to)->set_payload_size(simulated_size_in_bytes);
141 res->vetoable_start();
145 void Comm::sendto(Host* from, Host* to, double simulated_size_in_bytes)
147 sendto_async(from, to, simulated_size_in_bytes)->wait();
152 xbt_assert(get_state() == State::INITED || get_state() == State::STARTING,
153 "You cannot use %s() once your communication started (not implemented)", __FUNCTION__);
154 if (from_ != nullptr || to_ != nullptr) {
155 xbt_assert(from_ != nullptr && to_ != nullptr, "When either from_ or to_ is specified, both must be.");
156 xbt_assert(src_buff_ == nullptr && dst_buff_ == nullptr,
157 "Direct host-to-host communications cannot carry any data.");
158 pimpl_ = kernel::actor::simcall([this] {
159 kernel::activity::CommImplPtr res(new kernel::activity::CommImpl(this->from_, this->to_, this->get_remaining()));
164 } else if (src_buff_ != nullptr) { // Sender side
165 on_start(*this, true /* is_sender*/);
166 pimpl_ = simcall_comm_isend(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
167 clean_fun_, copy_data_function_, get_user_data(), detached_);
168 } else if (dst_buff_ != nullptr) { // Receiver side
169 xbt_assert(not detached_, "Receive cannot be detached");
170 on_start(*this, false /*is_sender*/);
171 pimpl_ = simcall_comm_irecv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_,
172 copy_data_function_, get_user_data(), rate_);
175 xbt_die("Cannot start a communication before specifying whether we are the sender or the receiver");
181 state_ = State::STARTED;
185 /** @brief Block the calling actor until the communication is finished, or until timeout
187 * On timeout, an exception is thrown and the communication is invalidated.
189 * @param timeout the amount of seconds to wait for the comm termination.
190 * Negative values denote infinite wait times. 0 as a timeout returns immediately. */
191 Comm* Comm::wait_for(double timeout)
194 case State::FINISHED:
198 case State::STARTING: // It's not started yet. Do it in one simcall if it's a regular communication
199 if (from_ != nullptr || to_ != nullptr) {
200 return vetoable_start()->wait_for(timeout); // In the case of host2host comm, do it in two simcalls
201 } else if (src_buff_ != nullptr) {
202 on_start(*this, true /*is_sender*/);
203 simcall_comm_send(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
204 copy_data_function_, get_user_data(), timeout);
207 on_start(*this, false /*is_sender*/);
208 simcall_comm_recv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_, copy_data_function_,
209 get_user_data(), timeout, rate_);
214 simcall_comm_wait(get_impl(), timeout);
217 case State::CANCELED:
218 throw CancelException(XBT_THROW_POINT, "Communication canceled");
223 complete(State::FINISHED);
227 int Comm::test_any(const std::vector<CommPtr>* comms)
229 std::vector<kernel::activity::CommImpl*> rcomms(comms->size());
230 std::transform(begin(*comms), end(*comms), begin(rcomms),
231 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
232 int changed_pos = simcall_comm_testany(rcomms.data(), rcomms.size());
233 if (changed_pos != -1)
234 comms->at(changed_pos)->complete(State::FINISHED);
240 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication is %s (not implemented)",
241 __FUNCTION__, get_state_str());
242 xbt_assert(dst_buff_ == nullptr && dst_buff_size_ == 0, "You can only detach sends, not recvs");
248 bool Comm::test() // TODO: merge with Activity::test, once modernized
250 xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::STARTING ||
251 state_ == State::CANCELED || state_ == State::FINISHED);
253 if (state_ == State::CANCELED || state_ == State::FINISHED)
256 if (state_ == State::INITED || state_ == State::STARTING)
257 this->vetoable_start();
259 if (simcall_comm_test(get_impl())) {
260 complete(State::FINISHED);
266 Mailbox* Comm::get_mailbox() const
271 Actor* Comm::get_sender() const
273 kernel::actor::ActorImplPtr sender = nullptr;
275 sender = boost::static_pointer_cast<kernel::activity::CommImpl>(pimpl_)->src_actor_;
276 return sender ? sender->get_ciface() : nullptr;
280 } // namespace simgrid
281 /* **************************** Public C interface *************************** */
282 void sg_comm_detach(sg_comm_t comm, void (*clean_function)(void*))
284 comm->detach(clean_function);
287 void sg_comm_unref(sg_comm_t comm)
291 int sg_comm_test(sg_comm_t comm)
293 bool finished = comm->test();
299 sg_error_t sg_comm_wait(sg_comm_t comm)
301 return sg_comm_wait_for(comm, -1);
304 sg_error_t sg_comm_wait_for(sg_comm_t comm, double timeout)
306 sg_error_t status = SG_OK;
308 simgrid::s4u::CommPtr s4u_comm(comm, false);
310 s4u_comm->wait_for(timeout);
311 } catch (const simgrid::TimeoutException&) {
312 status = SG_ERROR_TIMEOUT;
313 } catch (const simgrid::CancelException&) {
314 status = SG_ERROR_CANCELED;
315 } catch (const simgrid::NetworkFailureException&) {
316 status = SG_ERROR_NETWORK;
321 void sg_comm_wait_all(sg_comm_t* comms, size_t count)
323 std::vector<simgrid::s4u::CommPtr> s4u_comms;
324 for (unsigned int i = 0; i < count; i++)
325 s4u_comms.emplace_back(comms[i], false);
327 simgrid::s4u::Comm::wait_all(&s4u_comms);
330 int sg_comm_wait_any(sg_comm_t* comms, size_t count)
332 return sg_comm_wait_any_for(comms, count, -1);
335 int sg_comm_wait_any_for(sg_comm_t* comms, size_t count, double timeout)
337 std::vector<simgrid::s4u::CommPtr> s4u_comms;
338 for (unsigned int i = 0; i < count; i++)
339 s4u_comms.emplace_back(comms[i], false);
341 int pos = simgrid::s4u::Comm::wait_any_for(&s4u_comms, timeout);
342 for (unsigned i = 0; i < count; i++) {
343 if (pos != -1 && static_cast<unsigned>(pos) != i)
344 s4u_comms[i]->add_ref();