1 /* Copyright (c) 2010-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SMPI_COMM_HPP_INCLUDED
7 #define SMPI_COMM_HPP_INCLUDED
12 #include "smpi_errhandler.hpp"
13 #include "smpi_keyvals.hpp"
14 #include "smpi_group.hpp"
15 #include "smpi_topo.hpp"
16 #include "smpi_config.hpp"
21 class Comm : public F2C, public Keyval{
24 SMPI_Topo_type topoType_ = MPI_INVALID_TOPO;
25 std::shared_ptr<Topo> topo_; // to be replaced by an union
27 MPI_Comm leaders_comm_ = MPI_COMM_NULL; // inter-node communicator
28 MPI_Comm intra_comm_ = MPI_COMM_NULL; // intra-node communicator. For MPI_COMM_WORLD this can't be used, as var is
29 // global. Use an intracomm stored in the process data instead
30 int* leaders_map_ = nullptr; // who is the leader of each process
32 int* non_uniform_map_ = nullptr; // set if smp nodes have a different number of processes allocated
33 int is_blocked_ = 0; // are ranks allocated on the same smp node contiguous ?
34 bool is_smp_comm_ = false; // set to false in case this is already an intra-comm or a leader-comm to avoid
36 std::list<MPI_Win> rma_wins_; // attached windows for synchronization.
38 MPI_Info info_ = MPI_INFO_NULL;
40 MPI_Errhandler errhandler_ = _smpi_cfg_default_errhandler_is_error ? MPI_ERRORS_ARE_FATAL : MPI_ERRORS_RETURN;;
41 MPI_Errhandler* errhandlers_ = nullptr; //for MPI_COMM_WORLD only
44 static std::unordered_map<int, smpi_key_elem> keyvals_;
45 static int keyval_id_;
48 Comm(MPI_Group group, MPI_Topology topo, bool smp = false, int id = MPI_UNDEFINED);
49 int dup(MPI_Comm* newcomm);
50 int dup_with_info(MPI_Info info, MPI_Comm* newcomm);
52 MPI_Topology topo() const { return topo_; }
53 void set_topo(MPI_Topology topo){topo_=topo;}
57 void get_name(char* name, int* len) const;
58 std::string name() const override;
59 void set_name(const char* name);
61 void set_info( MPI_Info info);
62 MPI_Errhandler errhandler();
63 void set_errhandler( MPI_Errhandler errhandler);
64 void set_leaders_comm(MPI_Comm leaders);
65 void set_intra_comm(MPI_Comm leaders) { intra_comm_ = leaders; };
66 int* get_non_uniform_map() const;
67 int* get_leaders_map() const;
68 MPI_Comm get_leaders_comm() const;
69 MPI_Comm get_intra_comm() const;
70 MPI_Comm find_intra_comm(int* leader);
71 bool is_uniform() const;
72 bool is_blocked() const;
73 bool is_smp_comm() const;
74 MPI_Comm split(int color, int key);
77 static void unref(MPI_Comm comm);
78 static void destroy(MPI_Comm comm);
81 static void free_f(int id);
82 static Comm* f2c(int);
84 static int keyval_create(MPI_Comm_copy_attr_function* copy_fn, MPI_Comm_delete_attr_function* delete_fn, int* keyval,
86 static int keyval_free(int* keyval);
87 static void keyval_cleanup();
89 void add_rma_win(MPI_Win win);
90 void remove_rma_win(MPI_Win win);
91 void finish_rma_calls() const;
92 MPI_Comm split_type(int type, int key, const Info* info);
96 } // namespace simgrid