src/python/swig/pyevent.cc

   1 /*
   2  * Copyright (c) 2006 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  */
  30
  31 #include <Python.h>
  32
  33 #include "python/swig/pyevent.hh"
  34 #include "sim/async.hh"
  35
  36 PythonEvent::PythonEvent(PyObject *obj, Priority priority)
  37     : Event(priority), object(obj)
  38 {
  39     if (object == NULL)
  40         panic("Passed in invalid object");
  41 }
  42
  43 PythonEvent::~PythonEvent()
  44 {
  45 }
  46
  47 void
  48 PythonEvent::process()
  49 {
  50     PyObject *args = PyTuple_New(0);
  51     PyObject *result = PyObject_Call(object, args, NULL);
  52     Py_DECREF(args);
  53
  54     if (result) {
  55         // Nothing to do just decrement the reference count
  56         Py_DECREF(result);
  57     } else {
  58         // Somethign should be done to signal back to the main interpreter
  59         // that there's been an exception.
  60         async_event = true;
  61         async_exception = true;
  62     }
  63
  64     // Since the object has been removed from the event queue, its
  65     // reference count must be decremented.
  66     Py_DECREF(object);
  67 }
  68
  69 CountedDrainEvent *
  70 createCountedDrain()
  71 {
  72     return new CountedDrainEvent();
  73 }
  74
  75 void
  76 cleanupCountedDrain(Event *counted_drain)
  77 {
  78     CountedDrainEvent *event =
  79         dynamic_cast<CountedDrainEvent *>(counted_drain);
  80     if (event == NULL) {
  81         fatal("Called cleanupCountedDrain() on an event that was not "
  82               "a CountedDrainEvent.");
  83     }
  84     assert(event->getCount() == 0);
  85     delete event;
  86 }