1 /* Copyright (c) 2010-2021. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #ifndef SMPI_GROUP_HPP_INCLUDED
8 #define SMPI_GROUP_HPP_INCLUDED
10 #include "smpi_f2c.hpp"
11 #include <smpi/smpi.h>
18 class Group : public F2C{
19 /* This is actually a map from int to s4u::Actor*. We could use std::map here, but looking up a value there costs
20 * O(log(n)). For a vector, this costs O(1). We hence go with the vector.
22 std::vector<s4u::Actor*> rank_to_actor_map_;
23 std::map<s4u::Actor*, int> actor_to_rank_map_;
24 std::vector<int> pid_to_rank_map_;
26 int refcount_ = 1; /* refcount_: start > 0 so that this group never gets freed */
28 int incl(const std::vector<int>& ranks, MPI_Group* newgroup) const;
29 int excl(const std::vector<bool>& excl_map, MPI_Group* newgroup) const;
33 explicit Group(int size) : rank_to_actor_map_(size, nullptr), pid_to_rank_map_(size, MPI_UNDEFINED) {}
34 explicit Group(const Group* origin);
36 void set_mapping(s4u::Actor* actor, int rank);
37 int rank(aid_t pid) const;
38 s4u::Actor* actor(int rank) const;
39 std::string name() const override {return std::string("MPI_Group");}
40 int rank(s4u::Actor* process) const;
42 static void unref(MPI_Group group);
43 int size() const { return static_cast<int>(rank_to_actor_map_.size()); }
44 int compare(const Group* group2) const;
45 int incl(int n, const int* ranks, MPI_Group* newgroup) const;
46 int excl(int n, const int* ranks, MPI_Group* newgroup) const;
47 int group_union(const Group* group2, MPI_Group* newgroup) const;
48 int intersection(const Group* group2, MPI_Group* newgroup) const;
49 int difference(const Group* group2, MPI_Group* newgroup) const;
50 int range_incl(int n, const int ranges[][3], MPI_Group* newgroup) const;
51 int range_excl(int n, const int ranges[][3], MPI_Group* newgroup) const;
53 static Group* f2c(int id);