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_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 using smpi_key_elem = s_smpi_key_elem_t*;
45 std::unordered_map<int, void*> attributes_;
47 std::unordered_map<int, void*>& attributes() { return attributes_; }
50 // Each subclass should have two members, as we want to separate the ones for Win, Comm, and Datatypes :
51 // static std::unordered_map<int, smpi_key_elem> keyvals_;
52 // static int keyval_id_;
54 static int keyval_create(const smpi_copy_fn& copy_fn, const smpi_delete_fn& delete_fn, int* keyval,
56 template <typename T> static int keyval_free(int* keyval);
57 template <typename T> int attr_delete(int keyval);
58 template <typename T> int attr_get(int keyval, void* attr_value, int* flag);
59 template <typename T> int attr_put(int keyval, void* attr_value);
61 static int call_deleter(T* obj, const s_smpi_key_elem_t* elem, int keyval, void* value, int* flag);
62 template <typename T> void cleanup_attr();
66 int Keyval::keyval_create(const smpi_copy_fn& copy_fn, const smpi_delete_fn& delete_fn, int* keyval, void* extra_state)
68 auto* value = new s_smpi_key_elem_t;
70 value->copy_fn=copy_fn;
71 value->delete_fn=delete_fn;
72 value->extra_state=extra_state;
75 *keyval = T::keyval_id_;
76 T::keyvals_.emplace(*keyval, value);
81 template <typename T> int Keyval::keyval_free(int* keyval){
82 /* See MPI-1, 5.7.1. Freeing the keyval does not remove it if it
83 * is in use in an attribute */
84 smpi_key_elem elem = T::keyvals_.at(*keyval);
85 if (elem == nullptr) {
88 if(elem->refcount==1){
89 T::keyvals_.erase(*keyval);
94 *keyval = MPI_KEYVAL_INVALID;
98 template <typename T> int Keyval::attr_delete(int keyval){
99 smpi_key_elem elem = T::keyvals_.at(keyval);
103 void * value = nullptr;
105 if(this->attr_get<T>(keyval, &value, &flag)==MPI_SUCCESS){
106 int ret = call_deleter<T>((T*)this, elem, keyval,value,&flag);
110 if (attributes().empty())
112 attributes().erase(keyval);
117 template <typename T> int Keyval::attr_get(int keyval, void* attr_value, int* flag){
118 const s_smpi_key_elem_t* elem = T::keyvals_.at(keyval);
122 auto attr = attributes().find(keyval);
123 if (attr != attributes().end()) {
124 *static_cast<void**>(attr_value) = attr->second;
132 template <typename T> int Keyval::attr_put(int keyval, void* attr_value){
133 smpi_key_elem elem = T::keyvals_.at(keyval);
138 auto p = attributes().emplace(keyval, attr_value);
140 int ret = call_deleter<T>((T*)this, elem, keyval,p.first->second,&flag);
141 // overwrite previous value
142 p.first->second = attr_value;
149 template <typename T> void Keyval::cleanup_attr(){
151 for (auto const& it : attributes()) {
152 auto elm = T::keyvals_.find(it.first);
153 if (elm != T::keyvals_.end()) {
154 smpi_key_elem elem = elm->second;
155 if (elem != nullptr) {
156 call_deleter<T>((T*)this, elem, it.first, it.second, &flag);
159 // already deleted, not a problem