1 files changed, 168 insertions, 0 deletions
diff --git a/src/dev/pktfifo.hh b/src/dev/pktfifo.hh
new file mode 100644
index 000000000..336da22d8
--- /dev/null
+++ b/src/dev/pktfifo.hh
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2004-2005 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
+{
+  public:
+    typedef std::list<EthPacketPtr> fifo_list;
+    typedef fifo_list::iterator iterator;
+
+  protected:
+    std::list<EthPacketPtr> fifo;
+    int _maxsize;
+    int _size;
+    int _reserved;
+
+  public:
+    explicit PacketFifo(int max) : _maxsize(max), _size(0), _reserved(0) {}
+    virtual ~PacketFifo() {}
+
+    int packets() const { return fifo.size(); }
+    int maxsize() const { return _maxsize; }
+    int size() const { return _size; }
+    int reserved() const { return _reserved; }
+    int avail() const { return _maxsize - _size - _reserved; }
+    bool empty() const { return size() <= 0; }
+    bool full() const { return avail() <= 0; }
+
+    int reserve(int len = 0)
+    {
+        _reserved += len;
+        assert(avail() >= 0);
+        return _reserved;
+    }
+
+    iterator begin() { return fifo.begin(); }
+    iterator end() { return fifo.end(); }
+
+    EthPacketPtr front() { return fifo.front(); }
+
+    bool push(EthPacketPtr ptr)
+    {
+        assert(ptr->length);
+        assert(_reserved <= ptr->length);
+        assert(ptr->slack == 0);
+        if (avail() < ptr->length - _reserved)
+            return false;
+
+        _size += ptr->length;
+        fifo.push_back(ptr);
+        _reserved = 0;
+        return true;
+    }
+
+    void pop()
+    {
+        if (empty())
+            return;
+
+        EthPacketPtr &packet = fifo.front();
+        _size -= packet->length;
+        _size -= packet->slack;
+        packet->slack = 0;
+        packet = NULL;
+        fifo.pop_front();
+    }
+
+    void clear()
+    {
+        for (iterator i = begin(); i != end(); ++i)
+            (*i)->slack = 0;
+        fifo.clear();
+        _size = 0;
+        _reserved = 0;
+    }
+
+    void remove(iterator i)
+    {
+        EthPacketPtr &packet = *i;
+        if (i != fifo.begin()) {
+            iterator prev = i;
+            --prev;
+            assert(prev != fifo.end());
+            (*prev)->slack += packet->length;
+        } else {
+            _size -= packet->length;
+            _size -= packet->slack;
+        }
+
+        packet->slack = 0;
+        packet = NULL;
+        fifo.erase(i);
+    }
+
+    bool copyout(void *dest, int offset, int len);
+
+    int countPacketsBefore(iterator end)
+    {
+        iterator i = fifo.begin();
+        int count = 0;
+
+        while (i != end) {
+            ++count;
+            ++i;
+        }
+
+        return count;
+    }
+
+    int countPacketsAfter(iterator i)
+    {
+        iterator end = fifo.end();
+        int count = 0;
+
+        while (i != end) {
+            ++count;
+            ++i;
+        }
+
+        return count;
+    }
+
+
+/**
+ * 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__