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);
}
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);
}
else
flag = simcall_comm_test((*request)->action);
if(flag) {
- (*request)->refcount++;
finish_wait(request, status);
+ request=MPI_REQUEST_NULL;
}else{
smpi_empty_status(status);
}
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;
if(status != MPI_STATUSES_IGNORE) {
status[index] = *pstat;
}
+ requests[index]=MPI_REQUEST_NULL;
}else{
return MPI_UNDEFINED;
}
if(status != MPI_STATUSES_IGNORE) {
status[i] = *pstat;
}
+ requests[i]=MPI_REQUEST_NULL;
+
}
}else{
count_dead++;