Transaction.h

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2015 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #ifndef MBED_TRANSACTION_H
00017 #define MBED_TRANSACTION_H
00018 
00019 #include "platform/platform.h"
00020 #include "platform/FunctionPointer.h"
00021 
00022 namespace mbed {
00023 /** \addtogroup platform */
00024 /** @{*/
00025 /**
00026  * \defgroup platform_Transaction Transaction class
00027  * @{
00028  */
00029 
00030 /** Transaction structure
00031  */
00032 typedef struct {
00033     void *tx_buffer;           /**< Tx buffer */
00034     size_t tx_length;          /**< Length of Tx buffer*/
00035     void *rx_buffer;           /**< Rx buffer */
00036     size_t rx_length;          /**< Length of Rx buffer */
00037     uint32_t event;            /**< Event for a transaction */
00038     event_callback_t callback; /**< User's callback */
00039     uint8_t width;             /**< Buffer's word width (8, 16, 32, 64) */
00040 } transaction_t;
00041 
00042 /** Transaction class defines a transaction.
00043  *
00044  * @note Synchronization level: Not protected
00045  */
00046 template<typename Class>
00047 class Transaction {
00048 public:
00049     Transaction(Class *tpointer, const transaction_t& transaction) : _obj(tpointer), _data(transaction) {
00050     }
00051 
00052     Transaction() : _obj(), _data() {
00053     }
00054 
00055     ~Transaction() {
00056     }
00057 
00058     /** Get object's instance for the transaction
00059      *
00060      * @return The object which was stored
00061      */
00062     Class* get_object() {
00063         return _obj;
00064     }
00065 
00066     /** Get the transaction
00067      *
00068      * @return The transaction which was stored
00069      */
00070     transaction_t* get_transaction() {
00071         return &_data;
00072     }
00073 
00074 private:
00075     Class* _obj;
00076     transaction_t _data;
00077 };
00078 /**@}*/
00079 
00080 /**@}*/
00081 }
00082 
00083 #endif