X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ec353ddb75a8fc57fb3b1243fed37e0df06f7305..a138d21077d565562a591d21260cc3937cacdba0:/src/s4u/s4u_actor.cpp

diff --git a/src/s4u/s4u_actor.cpp b/src/s4u/s4u_actor.cpp
index 37d935fbff..7b6e9687ab 100644
--- a/src/s4u/s4u_actor.cpp
+++ b/src/s4u/s4u_actor.cpp
@@ -11,6 +11,7 @@
 #include "simgrid/s4u/Mailbox.hpp"
 
 #include "src/kernel/context/Context.hpp"
+#include <sstream>
 
 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_actor, "S4U actors");
 
@@ -167,6 +168,21 @@ void Actor::setProperty(const char* key, const char* value)
 
 namespace this_actor {
 
+/** Returns true if run from the kernel mode, and false if run from a real actor
+ *
+ * Everything that is run out of any actor (simulation setup before the engine is run,
+ * computing the model evolutions as a result to the actors' action, etc) is run in
+ * kernel mode, just as in any operating systems.
+ *
+ * In SimGrid, the actor in charge of doing the stuff in kernel mode is called Maestro,
+ * because it is the one scheduling when the others should move or wait.
+ */
+bool isMaestro()
+{
+  smx_context_t self_context = SIMIX_context_self();
+  return self_context == nullptr;
+}
+
 void sleep_for(double duration)
 {
   if (duration > 0)