[SMPI] Added two comments...

[simgrid.git] / src / smpi / include / smpi_request.hpp

diff --git a/src/smpi/include/smpi_request.hpp b/src/smpi/include/smpi_request.hpp
index 7d80fe8..0a8d220 100644 (file)
--- a/src/smpi/include/smpi_request.hpp
+++ b/src/smpi/include/smpi_request.hpp
@@ -18,8 +18,8 @@ class Request : public F2C {
     /* in the case of non-contiguous memory the user address should be keep
      * to unserialize the data inside the user memory*/
     void *old_buf_;
-    /* this let us know how to unserialize at the end of
-     * the communication*/
+    /* this is especially for derived datatypes that we need to serialize/unserialize.
+     * It let us know how to unserialize at the end of the communication */
     MPI_Datatype old_type_;
     size_t size_;
     int src_;
@@ -50,6 +50,7 @@ class Request : public F2C {
     int tag();
     int flags();
     int detached();
+    MPI_Datatype type();
     void print_request(const char *message);
     void start();
     void cancel();