1 files changed, 106 insertions, 0 deletions
diff --git a/nci/jni/DataQueue.h b/nci/jni/DataQueue.h
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+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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.
+ */
+
+/*
+ *  Store data bytes in a variable-size queue.
+ */
+
+#pragma once
+#include "NfcJniUtil.h"
+#include "gki.h"
+#include "Mutex.h"
+#include <list>
+
+
+class DataQueue
+{
+public:
+    /*******************************************************************************
+    **
+    ** Function:        DataQueue
+    **
+    ** Description:     Initialize member variables.
+    **
+    ** Returns:         None.
+    **
+    *******************************************************************************/
+    DataQueue ();
+
+
+    /*******************************************************************************
+    **
+    ** Function:        ~DataQueue
+    **
+    ** Description:      Release all resources.
+    **
+    ** Returns:         None.
+    **
+    *******************************************************************************/
+    ~DataQueue ();
+
+
+    /*******************************************************************************
+    **
+    ** Function:        enqueue
+    **
+    ** Description:     Append data to the queue.
+    **                  data: array of bytes
+    **                  dataLen: length of the data.
+    **
+    ** Returns:         True if ok.
+    **
+    *******************************************************************************/
+    bool enqueue (UINT8* data, UINT16 dataLen);
+
+
+    /*******************************************************************************
+    **
+    ** Function:        dequeue
+    **
+    ** Description:     Retrieve and remove data from the front of the queue.
+    **                  buffer: array to store the data.
+    **                  bufferMaxLen: maximum size of the buffer.
+    **                  actualLen: actual length of the data.
+    **
+    ** Returns:         True if ok.
+    **
+    *******************************************************************************/
+    bool dequeue (UINT8* buffer, UINT16 bufferMaxLen, UINT16& actualLen);
+
+
+    /*******************************************************************************
+    **
+    ** Function:        isEmpty
+    **
+    ** Description:     Whether the queue is empty.
+    **
+    ** Returns:         True if empty.
+    **
+    *******************************************************************************/
+    bool isEmpty();
+
+private:
+    struct tHeader
+    {
+        UINT16 mDataLen; //number of octets of data
+        UINT16 mOffset; //offset of the first octet of data
+    };
+    typedef std::list<tHeader*> Queue;
+
+    Queue mQueue;
+    Mutex mMutex;
+};
+