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99 lines
2.9 KiB
99 lines
2.9 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Store data bytes in a variable-size queue.
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*/
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#pragma once
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#include <list>
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#include "Mutex.h"
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#include "NfcJniUtil.h"
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#include "gki.h"
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class DataQueue {
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public:
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/*******************************************************************************
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**
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** Function: DataQueue
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**
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** Description: Initialize member variables.
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**
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** Returns: None.
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**
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*******************************************************************************/
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DataQueue();
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/*******************************************************************************
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**
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** Function: ~DataQueue
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**
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** Description: Release all resources.
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**
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** Returns: None.
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**
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*******************************************************************************/
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~DataQueue();
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/*******************************************************************************
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**
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** Function: enqueue
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**
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** Description: Append data to the queue.
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** data: array of bytes
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** dataLen: length of the data.
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**
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** Returns: True if ok.
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**
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*******************************************************************************/
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bool enqueue(uint8_t* data, uint16_t dataLen);
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/*******************************************************************************
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**
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** Function: dequeue
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**
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** Description: Retrieve and remove data from the front of the queue.
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** buffer: array to store the data.
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** bufferMaxLen: maximum size of the buffer.
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** actualLen: actual length of the data.
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**
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** Returns: True if ok.
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**
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*******************************************************************************/
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bool dequeue(uint8_t* buffer, uint16_t bufferMaxLen, uint16_t& actualLen);
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/*******************************************************************************
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**
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** Function: isEmpty
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**
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** Description: Whether the queue is empty.
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**
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** Returns: True if empty.
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**
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*******************************************************************************/
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bool isEmpty();
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private:
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struct tHeader {
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uint16_t mDataLen; // number of octets of data
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uint16_t mOffset; // offset of the first octet of data
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};
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typedef std::list<tHeader*> Queue;
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Queue mQueue;
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Mutex mMutex;
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};
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