From 4760ae46c6f9236bc5c5b45be9f9b059e6594958 Mon Sep 17 00:00:00 2001
From: Nathan Binkert <binkertn@umich.edu>
Date: Sat, 13 Nov 2004 16:52:08 -0500
Subject: Use the new PacketFifo class to avoid manual calculations

--HG--
extra : convert_revision : afa193904b7ed4d5e5c50e9dcb78e8e855b00ecc
---
 dev/pktfifo.hh | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 dev/pktfifo.hh

(limited to 'dev/pktfifo.hh')

diff --git a/dev/pktfifo.hh b/dev/pktfifo.hh
new file mode 100644
index 000000000..a54a49996
--- /dev/null
+++ b/dev/pktfifo.hh
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2002-2004 The Regents of The University of Michigan
+ * 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 copyright holders 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.
+ */
+
+#ifndef __DEV_PKTFIFO_HH__
+#define __DEV_PKTFIFO_HH__
+
+#include <iosfwd>
+#include <list>
+#include <string>
+
+#include "dev/etherpkt.hh"
+#include "sim/serialize.hh"
+
+class Checkpoint;
+class PacketFifo
+{
+  protected:
+    std::list<PacketPtr> fifo;
+    int _maxsize;
+    int _size;
+
+  public:
+    explicit PacketFifo(int max) : _maxsize(max), _size(0) {}
+    virtual ~PacketFifo() {}
+
+    int maxsize() const { return _maxsize; }
+    int packets() const { return fifo.size(); }
+    int size() const { return _size; }
+    int avail() const { return _maxsize - _size; }
+    bool empty() const { return _size == 0; }
+    bool full() const { return _size >= _maxsize; }
+
+    bool push(PacketPtr ptr)
+    {
+        if (avail() < ptr->length)
+            return false;
+
+        _size += ptr->length;
+        fifo.push_back(ptr);
+        return true;
+    }
+
+    PacketPtr front() { return fifo.front(); }
+
+    void pop()
+    {
+        if (empty())
+            return;
+
+        _size -= fifo.front()->length;
+        fifo.front() = NULL;
+        fifo.pop_front();
+    }
+
+    void clear()
+    {
+        fifo.clear();
+        _size = 0;
+    }
+
+/**
+ * Serialization stuff
+ */
+  public:
+    void serialize(const std::string &base, std::ostream &os);
+    void unserialize(const std::string &base,
+                     Checkpoint *cp, const std::string &section);
+};
+
+#endif // __DEV_PKTFIFO_HH__
-- 
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