re-implementation of C serial forwarder in C++

[tinyos-2.x.git] / support / sdk / cpp / sf / packetbuffer.h

diff --git a/support/sdk/cpp/sf/packetbuffer.h b/support/sdk/cpp/sf/packetbuffer.h
new file mode 100644 (file)
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+++ b/support/sdk/cpp/sf/packetbuffer.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2007, Technische Universitaet Berlin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright 
+ *   notice, this list of conditions and the following disclaimer in the 
+ *   documentation and/or other materials provided with the distribution.
+ * - Neither the name of the Technische Universitaet Berlin nor the names 
+ *   of its contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * @author Philipp Huppertz <huppertz@tkn.tu-berlin.de>
+ */
+
+#ifndef PACKETBUFFER_H
+#define PACKETBUFFER_H
+
+#include <pthread.h>
+#include <list>
+#include "sfpacket.h"
+
+//#define DEBUG_PACKETBUFFER
+
+#undef DEBUG
+#ifdef DEBUG_PACKETBUFFER
+#include <iostream>
+#define DEBUG(message) std::cout << message << std::endl;
+#else
+#define DEBUG(message) 
+#endif
+
+class PacketBuffer
+{
+protected:
+
+  static const int cMaxBufferSize = 25;
+
+  typedef std::list<SFPacket> container_t;
+
+  // thread safe buffer
+  typedef struct
+  {
+    // mutex lock for any of this vars
+    pthread_mutex_t lock;
+    // notempty cond
+    pthread_cond_t notempty;
+    // not full cond
+    pthread_cond_t notfull;
+    // actual buffer 
+    container_t container;
+    // number of packets in buffer
+    int size;
+  } sharedBuffer_t;
+
+  sharedBuffer_t buffer;
+
+public:
+  PacketBuffer();
+
+  ~PacketBuffer();
+
+  void clear();
+
+  SFPacket dequeue();
+
+  bool enqueueFront(SFPacket &pPacket);
+
+  bool enqueueBack(SFPacket &pPacket);
+
+  bool isFull();
+
+  bool isEmpty();
+
+  bool isInQueue(SFPacket &pPacket);
+  
+};
+
+#endif