1 /* Copyright (c) 2010-2020. 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_KEYVALS_HPP_INCLUDED
7 #define SMPI_KEYVALS_HPP_INCLUDED
11 #include <unordered_map>
13 struct smpi_delete_fn {
14 MPI_Comm_delete_attr_function *comm_delete_fn;
15 MPI_Type_delete_attr_function *type_delete_fn;
16 MPI_Win_delete_attr_function *win_delete_fn;
17 MPI_Comm_delete_attr_function_fort *comm_delete_fn_fort;
18 MPI_Type_delete_attr_function_fort *type_delete_fn_fort;
19 MPI_Win_delete_attr_function_fort *win_delete_fn_fort;
23 MPI_Comm_copy_attr_function *comm_copy_fn;
24 MPI_Type_copy_attr_function *type_copy_fn;
25 MPI_Win_copy_attr_function *win_copy_fn;
26 MPI_Comm_copy_attr_function_fort *comm_copy_fn_fort;
27 MPI_Type_copy_attr_function_fort *type_copy_fn_fort;
28 MPI_Win_copy_attr_function_fort *win_copy_fn_fort;
31 struct s_smpi_key_elem_t {
33 smpi_delete_fn delete_fn;
38 typedef s_smpi_key_elem_t* smpi_key_elem;
45 std::unordered_map<int, void*> attributes_;
47 std::unordered_map<int, void*>* attributes();
49 // Each subclass should have two members, as we want to separate the ones for Win, Comm, and Datatypes :
50 // static std::unordered_map<int, smpi_key_elem> keyvals_;
51 // static int keyval_id_;
53 static int keyval_create(const smpi_copy_fn& copy_fn, const smpi_delete_fn& delete_fn, int* keyval,
55 template <typename T> static int keyval_free(int* keyval);
56 template <typename T> int attr_delete(int keyval);
57 template <typename T> int attr_get(int keyval, void* attr_value, int* flag);
58 template <typename T> int attr_put(int keyval, void* attr_value);
60 static int call_deleter(T* obj, const s_smpi_key_elem_t* elem, int keyval, void* value, int* flag);
61 template <typename T> void cleanup_attr();
65 int Keyval::keyval_create(const smpi_copy_fn& copy_fn, const smpi_delete_fn& delete_fn, int* keyval, void* extra_state)
67 smpi_key_elem value = new s_smpi_key_elem_t;
69 value->copy_fn=copy_fn;
70 value->delete_fn=delete_fn;
71 value->extra_state=extra_state;
74 *keyval = T::keyval_id_;
75 T::keyvals_.insert({*keyval, value});
80 template <typename T> int Keyval::keyval_free(int* keyval){
81 /* See MPI-1, 5.7.1. Freeing the keyval does not remove it if it
82 * is in use in an attribute */
83 smpi_key_elem elem = T::keyvals_.at(*keyval);
87 if(elem->refcount==1){
88 T::keyvals_.erase(*keyval);
96 template <typename T> int Keyval::attr_delete(int keyval){
97 smpi_key_elem elem = T::keyvals_.at(keyval);
101 void * value = nullptr;
103 if(this->attr_get<T>(keyval, &value, &flag)==MPI_SUCCESS){
104 int ret = call_deleter<T>((T*)this, elem, keyval,value,&flag);
108 if(attributes()->empty())
110 attributes()->erase(keyval);
115 template <typename T> int Keyval::attr_get(int keyval, void* attr_value, int* flag){
116 const s_smpi_key_elem_t* elem = T::keyvals_.at(keyval);
119 if(attributes()->empty()){
123 const auto& attribs = attributes();
124 auto attr = attribs->find(keyval);
125 if (attr != attribs->end()) {
126 *static_cast<void**>(attr_value) = attr->second;
134 template <typename T> int Keyval::attr_put(int keyval, void* attr_value){
135 smpi_key_elem elem = T::keyvals_.at(keyval);
140 auto p = attributes()->insert({keyval, attr_value});
142 int ret = call_deleter<T>((T*)this, elem, keyval,p.first->second,&flag);
143 // overwrite previous value
144 p.first->second = attr_value;
151 template <typename T> void Keyval::cleanup_attr(){
152 if (not attributes()->empty()) {
154 for (auto const& it : attributes_) {
155 auto elm = T::keyvals_.find(it.first);
156 if (elm != T::keyvals_.end()) {
157 smpi_key_elem elem = elm->second;
159 call_deleter<T>((T*)this, elem, it.first,it.second,&flag);
162 // already deleted, not a problem