/*
 * Copyright (c) 2006 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.
 *
 * Authors: Nathan Binkert
 */

#include "python/swig/pyevent.hh"

#include <Python.h>

#include "base/misc.hh"
#include "sim/async.hh"
#include "sim/eventq.hh"

PythonEvent::PythonEvent(PyObject *code, Priority priority)
    : Event(priority), eventCode(code)
{
    if (code == NULL)
        panic("Passed in invalid object");
}

PythonEvent::~PythonEvent()
{
}

void
PythonEvent::process()
{
    PyObject *args = PyTuple_New(0);
    PyObject *result = PyObject_Call(eventCode, args, NULL);
    Py_DECREF(args);

    if (result) {
        // Nothing to do just decrement the reference count
        Py_DECREF(result);
    } else {
        // Somethign should be done to signal back to the main interpreter
        // that there's been an exception.
        async_event = true;
        async_exception = true;
        /* Wake up some event queue to handle event */
        getEventQueue(0)->wakeup();
    }

    // Since the object has been removed from the event queue, its
    // reference count must be decremented.
    Py_DECREF(object);
}