Diff: simple-mbed-cloud-client/mbed-cloud-client/mbed-client/source/m2mcallbackstorage.cpp

Revision:

0:119624335925

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simple-mbed-cloud-client/mbed-cloud-client/mbed-client/source/m2mcallbackstorage.cpp	Sat Jun 30 01:40:30 2018 +0000
@@ -0,0 +1,218 @@
+/*
+ * Copyright (c) 2017 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/m2mcallbackstorage.h"
+
+#include <cstddef>
+
+// Dummy constructor, which does not init any value to something meaningful but needed for array construction.
+// It is better to leave values unintialized, so the Valgrind will point out if the Vector is used without
+// setting real values in there.
+M2MCallbackAssociation::M2MCallbackAssociation()
+{
+}
+
+M2MCallbackAssociation::M2MCallbackAssociation(const M2MBase *object, void *callback, M2MCallbackType type, void *client_args)
+: _object(object), _callback(callback), _type(type), _client_args(client_args)
+{
+}
+
+M2MCallbackStorage* M2MCallbackStorage::_static_instance = NULL;
+
+M2MCallbackStorage *M2MCallbackStorage::get_instance()
+{
+    if (M2MCallbackStorage::_static_instance == NULL) {
+        M2MCallbackStorage::_static_instance = new M2MCallbackStorage();
+    }
+    return M2MCallbackStorage::_static_instance;
+}
+
+void M2MCallbackStorage::delete_instance()
+{
+    delete M2MCallbackStorage::_static_instance;
+    M2MCallbackStorage::_static_instance = NULL;
+}
+
+M2MCallbackStorage::~M2MCallbackStorage()
+{
+    // TODO: go through the list and delete all the FP<n> objects if there are any.
+    // On the other hand, if the system is done properly, each m2mobject should actually
+    // remove its callbacks from its destructor so there is nothing here to do
+}
+
+bool M2MCallbackStorage::add_callback(const M2MBase &object,
+                                      void *callback,
+                                      M2MCallbackAssociation::M2MCallbackType type,
+                                      void *client_args)
+{
+    bool add_success = false;
+    M2MCallbackStorage* instance = get_instance();
+    if (instance) {
+
+        add_success = instance->do_add_callback(object, callback, type, client_args);
+    }
+    return add_success;
+}
+
+bool M2MCallbackStorage::do_add_callback(const M2MBase &object, void *callback, M2MCallbackAssociation::M2MCallbackType type, void *client_args)
+{
+    bool add_success = false;
+
+    // verify that the same callback is not re-added.
+    if (does_callback_exist(object, callback, type) == false) {
+
+        const M2MCallbackAssociation association(&object, callback, type, client_args);
+        _callbacks.push_back(association);
+        add_success = true;
+    }
+
+    return add_success;
+}
+
+#if 0 // Functions not used currently
+void M2MCallbackStorage::remove_callbacks(const M2MBase &object)
+{
+   // do not use the get_instance() here as it might create the instance
+    M2MCallbackStorage* instance = M2MCallbackStorage::_static_instance;
+    if (instance) {
+
+        instance->do_remove_callbacks(object);
+    }
+}
+
+void M2MCallbackStorage::do_remove_callbacks(const M2MBase &object)
+{
+    // find any association to given object and delete them from the vector
+    for (int index = 0; index < _callbacks.size();) {
+        if (_callbacks[index]._object == &object) {
+            _callbacks.erase(index);
+        } else {
+            index++;
+        }
+    }
+}
+#endif
+
+void* M2MCallbackStorage::remove_callback(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type)
+{
+    void* callback = NULL;
+
+    // do not use the get_instance() here as it might create the instance
+    M2MCallbackStorage* instance = M2MCallbackStorage::_static_instance;
+    if (instance) {
+
+        callback = instance->do_remove_callback(object, type);
+    }
+    return callback;
+}
+
+void* M2MCallbackStorage::do_remove_callback(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type)
+{
+    void* callback = NULL;
+    for (int index = 0; index < _callbacks.size(); index++) {
+
+        if ((_callbacks[index]._object == &object) && (_callbacks[index]._type == type)) {
+            callback = _callbacks[index]._callback;
+            _callbacks.erase(index);
+            break;
+        }
+    }
+    return callback;
+}
+
+void* M2MCallbackStorage::get_callback(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type)
+{
+    void* callback = NULL;
+    const M2MCallbackStorage* instance = get_instance();
+    if (instance) {
+
+        callback = instance->do_get_callback(object, type);
+    }
+    return callback;
+}
+
+void* M2MCallbackStorage::do_get_callback(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type) const
+{
+    void* callback = NULL;
+    if (!_callbacks.empty()) {
+        M2MCallbackAssociationList::const_iterator it = _callbacks.begin();
+
+        for ( ; it != _callbacks.end(); it++ ) {
+
+            if ((it->_object == &object) && (it->_type == type)) {
+                callback = it->_callback;
+                break;
+            }
+        }
+    }
+    return callback;
+}
+
+M2MCallbackAssociation* M2MCallbackStorage::get_association_item(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type)
+{
+    M2MCallbackAssociation* callback_association = NULL;
+    const M2MCallbackStorage* instance = get_instance();
+    if (instance) {
+
+        callback_association = instance->do_get_association_item(object, type);
+    }
+    return callback_association;
+}
+
+M2MCallbackAssociation* M2MCallbackStorage::do_get_association_item(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type) const
+{
+    M2MCallbackAssociation* callback_association = NULL;
+    if (!_callbacks.empty()) {
+        M2MCallbackAssociationList::const_iterator it = _callbacks.begin();
+
+        for ( ; it != _callbacks.end(); it++ ) {
+
+            if ((it->_object == &object) && (it->_type == type)) {
+                callback_association = (M2MCallbackAssociation*)it;
+                break;
+            }
+        }
+    }
+    return callback_association;
+}
+
+bool M2MCallbackStorage::does_callback_exist(const M2MBase &object, M2MCallbackAssociation::M2MCallbackType type)
+{
+    bool found = false;
+    if (get_callback(object, type) != NULL) {
+        found = true;
+    }
+    return found;
+}
+
+bool M2MCallbackStorage::does_callback_exist(const M2MBase &object, void *callback, M2MCallbackAssociation::M2MCallbackType type) const
+{
+    bool match_found = false;
+
+    if (!_callbacks.empty()) {
+        M2MCallbackAssociationList::const_iterator it = _callbacks.begin();
+
+        for ( ; it != _callbacks.end(); it++ ) {
+
+            if ((it->_object == &object) && (it->_callback == callback) && (it->_type == type)) {
+                match_found = true;
+                break;
+            }
+        }
+    }
+
+    return match_found;
+}