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/*
* 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: Ali Saidi
*/
#ifndef __CPU_CPUEVENT_HH__
#define __CPU_CPUEVENT_HH__
#include <vector>
#include "sim/eventq.hh"
class ThreadContext;
/**
* This class creates a global list of events that need a pointer to a
* thread context. When a switchover takes place the events can be
* migrated to the new thread context, otherwise you could have a wake
* timer interrupt go off on a switched out cpu or other unfortunate
* events. This object MUST be dynamically allocated to avoid it being
* deleted after a cpu switch happens.
*/
class CpuEvent : public Event
{
protected:
/** type of global list of cpu events. */
typedef std::vector<CpuEvent *> CpuEventList;
/** Static list of cpu events that is searched every time a cpu switch
* happens. */
static CpuEventList cpuEventList;
/** The thread context that is switched to the new cpus. */
ThreadContext *tc;
public:
CpuEvent(EventQueue *q, ThreadContext *_tc, Priority p = Default_Pri)
: Event(q, p), tc(_tc)
{ cpuEventList.push_back(this); }
/** delete the cpu event from the global list. */
~CpuEvent();
/** Update all events switching old tc to new tc.
* @param oldTc the old thread context we are switching from
* @param newTc the new thread context we are switching to.
*/
static void replaceThreadContext(ThreadContext *oldTc,
ThreadContext *newTc);
ThreadContext* getTC() { return tc; }
};
template <class T, void (T::* F)(ThreadContext *tc)>
class CpuEventWrapper : public CpuEvent
{
private:
T *object;
public:
CpuEventWrapper(T *obj, ThreadContext *_tc,
EventQueue *q = &mainEventQueue, Priority p = Default_Pri)
: CpuEvent(q, _tc, p), object(obj)
{ }
void process() { (object->*F)(tc); }
};
#endif // __CPU_CPUEVENT_HH__
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