X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8adc09758d857a4964013fa30184c9eec770f2bf..e9b2c4f3e967b4f0771067519c57cc9d519ae886:/src/smpi/mpi/smpi_group.cpp

diff --git a/src/smpi/mpi/smpi_group.cpp b/src/smpi/mpi/smpi_group.cpp
index 23c4809e80..4506de673e 100644
--- a/src/smpi/mpi/smpi_group.cpp
+++ b/src/smpi/mpi/smpi_group.cpp
@@ -22,11 +22,9 @@ Group::Group()
   refcount_          = 1;       /* refcount_: start > 0 so that this group never gets freed */
 }
 
-Group::Group(int n) : size_(n), rank_to_index_map_(size_)
+Group::Group(int n) : size_(n), rank_to_index_map_(size_, MPI_UNDEFINED)
 {
   refcount_ = 1;
-  for (int i              = 0; i < size_; i++)
-    rank_to_index_map_[i] = MPI_UNDEFINED;
 }
 
 Group::Group(MPI_Group origin)
@@ -35,43 +33,40 @@ Group::Group(MPI_Group origin)
     size_              = origin->size();
     refcount_          = 1;
     rank_to_index_map_ = origin->rank_to_index_map_;
-
-    for (auto const& elm : origin->index_to_rank_map_) {
-      index_to_rank_map_.insert({elm.first, elm.second});
-    }
+    index_to_rank_map_ = origin->index_to_rank_map_;
   }
 }
 
-Group::~Group()
-{
-  rank_to_index_map_.clear();
-}
-
 void Group::set_mapping(int index, int rank)
 {
-  if (rank < size_) {
+  if (0 <= rank && rank < size_) {
     rank_to_index_map_[rank] = index;
-    if (index != MPI_UNDEFINED)
-      index_to_rank_map_.insert({index, rank});
+    if (index != MPI_UNDEFINED) {
+      if ((unsigned)index >= index_to_rank_map_.size())
+        index_to_rank_map_.resize(index + 1, MPI_UNDEFINED);
+      index_to_rank_map_[index] = rank;
+    }
   }
 }
 
 int Group::index(int rank)
 {
-  int index = MPI_UNDEFINED;
-
-  if (0 <= rank && rank < size_) {
+  int index;
+  if (0 <= rank && rank < size_)
     index = rank_to_index_map_[rank];
-  }
+  else
+    index = MPI_UNDEFINED;
   return index;
 }
 
 int Group::rank(int index)
 {
-  if (this == MPI_GROUP_EMPTY)
-    return MPI_UNDEFINED;
-  auto rank = index_to_rank_map_.find(index);
-  return rank == index_to_rank_map_.end() ? MPI_UNDEFINED : rank->second;
+  int rank;
+  if (0 <= index && (unsigned)index < index_to_rank_map_.size())
+    rank = index_to_rank_map_[index];
+  else
+    rank = MPI_UNDEFINED;
+  return rank;
 }
 
 void Group::ref()
@@ -239,6 +234,14 @@ int Group::excl(int n, int *ranks, MPI_Group * newgroup){
 
 }
 
+static bool is_rank_in_range(int rank, int first, int last)
+{
+  if (first < last)
+    return rank <= last;
+  else
+    return rank >= last;
+}
+
 int Group::range_incl(int n, int ranges[][3], MPI_Group * newgroup){
   int newsize = 0;
   for (int i = 0; i < n; i++) {
@@ -250,13 +253,8 @@ int Group::range_incl(int n, int ranges[][3], MPI_Group * newgroup){
         break;
       }
       rank += ranges[i][2]; /* Stride */
-      if (ranges[i][0] < ranges[i][1]) {
-        if (rank > ranges[i][1])
-          break;
-      } else {
-        if (rank < ranges[i][1])
-          break;
-      }
+      if (not is_rank_in_range(rank, ranges[i][0], ranges[i][1]))
+        break;
     }
   }
   *newgroup = new  Group(newsize);
@@ -272,13 +270,8 @@ int Group::range_incl(int n, int ranges[][3], MPI_Group * newgroup){
         break;
       }
       rank += ranges[i][2]; /* Stride */
-      if (ranges[i][0] < ranges[i][1]) {
-        if (rank > ranges[i][1])
-          break;
-      } else {
-        if (rank < ranges[i][1])
-          break;
-      }
+      if (not is_rank_in_range(rank, ranges[i][0], ranges[i][1]))
+        break;
     }
   }
   return MPI_SUCCESS;
@@ -295,13 +288,8 @@ int Group::range_excl(int n, int ranges[][3], MPI_Group * newgroup){
         break;
       }
       rank += ranges[i][2]; /* Stride */
-      if (ranges[i][0] < ranges[i][1]) {
-        if (rank > ranges[i][1])
-          break;
-      } else {
-        if (rank < ranges[i][1])
-          break;
-      }
+      if (not is_rank_in_range(rank, ranges[i][0], ranges[i][1]))
+        break;
     }
   }
   if (newsize == 0) {
@@ -322,13 +310,8 @@ int Group::range_excl(int n, int ranges[][3], MPI_Group * newgroup){
             break;
           }
           rank += ranges[i][2]; /* Stride */
-          if (ranges[i][0]<ranges[i][1]){
-            if (rank > ranges[i][1])
-              break;
-          }else{
-            if (rank < ranges[i][1])
-              break;
-          }
+          if (not is_rank_in_range(rank, ranges[i][0], ranges[i][1]))
+            break;
         }
       }
       if(add==1){