From: Christian Heinrich <franz-christian.heinrich@inria.fr>
Date: Thu, 19 Apr 2018 10:49:24 +0000 (+0200)
Subject: [SMPI] Added two comments...
X-Git-Tag: v3.20~356
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/1534e8b86fec84f67d8a253131a1ef60396a3a38?ds=sidebyside

[SMPI] Added two comments...
---

diff --git a/src/smpi/bindings/smpi_pmpi_request.cpp b/src/smpi/bindings/smpi_pmpi_request.cpp
index 5f50bff1be..458f7f9608 100644
--- a/src/smpi/bindings/smpi_pmpi_request.cpp
+++ b/src/smpi/bindings/smpi_pmpi_request.cpp
@@ -89,6 +89,11 @@ int PMPI_Ssend_init(void* buf, int count, MPI_Datatype datatype, int dst, int ta
   return retval;
 }
 
+/*
+ * This function starts a request returned by init functions such as
+ * MPI_Send_init(), MPI_Ssend_init (see above), and friends.
+ * They should already have performed sanity checks.
+ */
 int PMPI_Start(MPI_Request * request)
 {
   int retval = 0;
diff --git a/src/smpi/include/smpi_request.hpp b/src/smpi/include/smpi_request.hpp
index 47c6e5c97a..0a8d220217 100644
--- 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_;