1 /* Copyright (c) 2006-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "src/msg/msg_private.h"
9 #include "src/simix/smx_network_private.h"
10 #include "src/simix/smx_process_private.h"
12 #include "simgrid/s4u/mailbox.hpp"
14 XBT_LOG_EXTERNAL_CATEGORY(s4u);
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_channel,s4u,"S4U Communication Mailboxes");
20 const char *Mailbox::getName() {
24 MailboxPtr Mailbox::byName(const char*name) {
25 // FIXME: there is a race condition here where two actors run Mailbox::byName
26 // on a non-existent mailbox during the same scheduling round. Both will be
27 // interrupted in the simcall creating the underlying simix mbox.
28 // Only one simix object will be created, but two S4U objects will be created.
29 // Only one S4U object will be stored in the hashmap and used, and the other
30 // one will be leaked.
31 smx_mailbox_t mbox = simcall_mbox_get_by_name(name);
33 mbox = simcall_mbox_create(name);
34 return MailboxPtr(&mbox->mbox_, true);
37 bool Mailbox::empty() {
38 return nullptr == simcall_mbox_front(pimpl_);
41 void Mailbox::setReceiver(Actor* actor) {
42 simcall_mbox_set_receiver(pimpl_, actor == nullptr ? nullptr : actor->pimpl_);
45 /** @brief get the receiver (process associated to the mailbox) */
46 ActorPtr Mailbox::receiver() {
47 if(pimpl_->permanent_receiver == nullptr) return ActorPtr();
48 return ActorPtr(&pimpl_->permanent_receiver->actor());
54 /*------- C functions -------*/
56 sg_mbox_t sg_mbox_by_name(const char*name){
57 return simgrid::s4u::Mailbox::byName(name).get();
59 int sg_mbox_is_empty(sg_mbox_t mbox) {
62 void sg_mbox_setReceiver(sg_mbox_t mbox, smx_process_t process) {
63 mbox->setReceiver(&process->actor());
65 smx_process_t sg_mbox_receiver(sg_mbox_t mbox) {
66 return mbox->receiver()->getInferior();