X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/5d924feccdf1e4fb220ad5c1dc784ad4d656d43d..c94e821e152ba209559e8b646a70c4a77849f13e:/src/smpi/smpi_base.c

diff --git a/src/smpi/smpi_base.c b/src/smpi/smpi_base.c
index 0960c41698..f5a219247d 100644
--- a/src/smpi/smpi_base.c
+++ b/src/smpi/smpi_base.c
@@ -197,7 +197,7 @@ static MPI_Request build_request(void *buf, int count,
   if(datatype->has_subtype == 1){
     // This part handles the problem of non-contiguous memory
     old_buf = buf;
-    buf = xbt_malloc(count*smpi_datatype_size(datatype));
+    buf = count==0 ? NULL : xbt_malloc(count*smpi_datatype_size(datatype));
     if (flags & SEND) {
       subtype->serialize(old_buf, buf, count, datatype->substruct);
     }
@@ -362,7 +362,7 @@ void smpi_mpi_start(MPI_Request request)
       request->refcount++;
       if(request->old_type->has_subtype == 0){
         oldbuf = request->buf;
-        if (oldbuf){
+        if (oldbuf && request->size!=0){
           request->buf = xbt_malloc(request->size);
           memcpy(request->buf,oldbuf,request->size);
         }
@@ -600,8 +600,8 @@ int smpi_mpi_test(MPI_Request * request, MPI_Status * status) {
   else
     flag = simcall_comm_test((*request)->action);
   if(flag) {
-    (*request)->refcount++;
     finish_wait(request, status);
+    request=MPI_REQUEST_NULL;
   }else{
     smpi_empty_status(status);
   }
@@ -807,6 +807,7 @@ int smpi_mpi_waitall(int count, MPI_Request requests[],
       index = smpi_mpi_waitany(count, requests, pstat);
       if (index == MPI_UNDEFINED)
         break;
+      requests[index]=MPI_REQUEST_NULL;
     }
     if (status != MPI_STATUSES_IGNORE) {
       status[index] = *pstat;
@@ -835,6 +836,7 @@ int smpi_mpi_waitsome(int incount, MPI_Request requests[], int *indices,
       if(status != MPI_STATUSES_IGNORE) {
         status[index] = *pstat;
       }
+     requests[index]=MPI_REQUEST_NULL;
     }else{
       return MPI_UNDEFINED;
     }
@@ -859,6 +861,8 @@ int smpi_mpi_testsome(int incount, MPI_Request requests[], int *indices,
          if(status != MPI_STATUSES_IGNORE) {
            status[i] = *pstat;
          }
+         requests[i]=MPI_REQUEST_NULL;
+
       }
     }else{
       count_dead++;