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diff --git a/base/pollevent.hh b/base/pollevent.hh
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+/*
+ * Copyright (c) 2003 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 __POLLEVENT_H__
+#define __POLLEVENT_H__
+
+#include <vector>
+#include <poll.h>
+#include "universe.hh"
+
+class PollEvent
+{
+  private:
+    friend class PollQueue;
+
+  protected:
+    pollfd pfd;
+    PollQueue *queue;
+    bool enabled;
+
+  public:
+    PollEvent(int fd, int event);
+    virtual ~PollEvent();
+
+    void disable();
+    void enable();
+    virtual void process(int revent) = 0;
+};
+
+class PollQueue
+{
+  private:
+    typedef std::vector<PollEvent *> eventvec_t;
+    eventvec_t events;
+
+    pollfd *poll_fds;
+    int max_size;
+    int num_fds;
+
+  public:
+    PollQueue();
+    ~PollQueue();
+
+    void copy();
+    void remove(PollEvent *event);
+    void schedule(PollEvent *event);
+    void service();
+
+  protected:
+    static bool handler;
+    static struct sigaction oldio;
+    static struct sigaction oldalrm;
+
+  public:
+    static void setupAsyncIO(int fd, bool set);
+    static void handleIO(int);
+    static void handleALRM(int);
+    static void removeHandler();
+    static void setupHandler();
+};
+
+extern PollQueue pollQueue;
+
+#endif // __POLLEVENT_H__