+ if (suspended) {
+ XBT_DEBUG("Process '%s' is already suspended", name.c_str());
+ return nullptr;
+ }
+
+ suspended = 1;
+
+ /* If we are suspending another process that is waiting on a sync, suspend its synchronization. */
+ if (this != issuer) {
+ if (waiting_synchro)
+ waiting_synchro->suspend();
+ /* If the other process is not waiting, its suspension is delayed to when the process is rescheduled. */
+
+ return nullptr;
+ } else {
+ return SIMIX_execution_start(this, "suspend", 0.0, 1.0, 0.0);
+ }
+}
+
+void ActorImpl::resume()
+{
+ XBT_IN("process = %p", this);
+
+ if (context->iwannadie) {
+ XBT_VERB("Ignoring request to suspend a process that is currently dying.");
+ return;
+ }
+
+ if (not suspended)
+ return;
+ suspended = 0;
+
+ /* resume the synchronization that was blocking the resumed process. */
+ if (waiting_synchro)
+ waiting_synchro->resume();
+
+ XBT_OUT();
+}
+
+smx_activity_t ActorImpl::sleep(double duration)
+{
+ if (host->isOff())
+ THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->getCname());
+
+ simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
+ synchro->host = host;
+ synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
+ synchro->surf_sleep->setData(synchro);
+ XBT_DEBUG("Create sleep synchronization %p", synchro);
+
+ return synchro;