+bool Mailbox::listen()
+{
+ return not this->empty() || (pimpl_->permanent_receiver && not pimpl_->done_comm_queue.empty());
+}
+
+smx_activity_t Mailbox::front()
+{
+ return pimpl_->comm_queue.empty() ? nullptr : pimpl_->comm_queue.front();
+}
+
+void Mailbox::setReceiver(ActorPtr actor) {
+ simix::kernelImmediate([this, actor]() { this->pimpl_->setReceiver(actor); });
+}
+
+/** @brief get the receiver (process associated to the mailbox) */
+ActorPtr Mailbox::getReceiver()
+{
+ if (pimpl_->permanent_receiver == nullptr)
+ return ActorPtr();
+ return pimpl_->permanent_receiver->iface();
+}
+
+CommPtr Mailbox::put_init()
+{
+ CommPtr res = CommPtr(new s4u::Comm());
+ res->sender_ = SIMIX_process_self();
+ res->mailbox_ = this;
+ return res;
+}
+s4u::CommPtr Mailbox::put_init(void* data, uint64_t simulatedSize)
+{
+ s4u::CommPtr res = put_init();
+ res->setRemains(simulatedSize);
+ res->srcBuff_ = data;
+ res->srcBuffSize_ = sizeof(void*);
+ return res;
+}
+s4u::CommPtr Mailbox::put_async(void* payload, uint64_t simulatedSize)
+{
+ xbt_assert(payload != nullptr, "You cannot send nullptr");
+
+ s4u::CommPtr res = put_init(payload, simulatedSize);
+ res->start();
+ return res;
+}
+void Mailbox::put(void* payload, uint64_t simulatedSize)
+{
+ xbt_assert(payload != nullptr, "You cannot send nullptr");
+
+ CommPtr c = put_init();
+ c->setRemains(simulatedSize);
+ c->setSrcData(payload);
+ c->wait();
+}
+/** Blocking send with timeout */
+void Mailbox::put(void* payload, uint64_t simulatedSize, double timeout)
+{
+ xbt_assert(payload != nullptr, "You cannot send nullptr");
+
+ CommPtr c = put_init();
+ c->setRemains(simulatedSize);
+ c->setSrcData(payload);
+ // c->start() is optional.
+ c->wait(timeout);
+}
+
+s4u::CommPtr Mailbox::get_init()
+{
+ CommPtr res = CommPtr(new s4u::Comm());
+ res->receiver_ = SIMIX_process_self();
+ res->mailbox_ = this;
+ return res;
+}
+s4u::CommPtr Mailbox::get_async(void** data)
+{
+ s4u::CommPtr res = get_init();
+ res->setDstData(data, sizeof(*data));
+ res->start();
+ return res;
+}
+
+void* Mailbox::get()
+{
+ void* res = nullptr;
+ CommPtr c = get_init();
+ c->setDstData(&res, sizeof(res));
+ c->wait();
+ return res;
+}
+void* Mailbox::get(double timeout)
+{
+ void* res = nullptr;
+ CommPtr c = get_init();
+ c->setDstData(&res, sizeof(res));
+ c->wait(timeout);
+ return res;