+namespace simgrid {
+namespace s4u {
+
+const char *Mailbox::name() {
+ return pimpl_->name;
+}
+
+MailboxPtr Mailbox::byName(const char*name)
+{
+ // FIXME: there is a race condition here where two actors run Mailbox::byName
+ // on a non-existent mailbox during the same scheduling round. Both will be
+ // interrupted in the simcall creating the underlying simix mbox.
+ // Only one simix object will be created, but two S4U objects will be created.
+ // Only one S4U object will be stored in the hashmap and used, and the other
+ // one will be leaked.
+ smx_mailbox_t mbox = SIMIX_mbox_get_by_name(name);
+ if (mbox == nullptr)
+ mbox = simcall_mbox_create(name);
+ return MailboxPtr(&mbox->piface_, true);
+}
+
+MailboxPtr Mailbox::byName(std::string name)
+{
+ return byName(name.c_str());
+}
+
+bool Mailbox::empty()
+{
+ return pimpl_->comm_queue.empty();
+}