91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
/*
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* Copyright (c) 2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ali Saidi
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*/
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#ifndef __CPU_CPUEVENT_HH__
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#define __CPU_CPUEVENT_HH__
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#include <vector>
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#include "sim/eventq.hh"
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class ThreadContext;
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/**
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* This class creates a global list of events that need a pointer to a
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* thread context. When a switchover takes place the events can be
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* migrated to the new thread context, otherwise you could have a wake
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* timer interrupt go off on a switched out cpu or other unfortunate
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* events. This object MUST be dynamically allocated to avoid it being
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* deleted after a cpu switch happens.
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*/
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class CpuEvent : public Event
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{
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protected:
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/** type of global list of cpu events. */
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typedef std::vector<CpuEvent *> CpuEventList;
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/** Static list of cpu events that is searched every time a cpu switch
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* happens. */
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static CpuEventList cpuEventList;
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/** The thread context that is switched to the new cpus. */
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ThreadContext *tc;
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public:
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CpuEvent(EventQueue *q, ThreadContext *_tc, Priority p = Default_Pri)
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: Event(q, p), tc(_tc)
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{ cpuEventList.push_back(this); }
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/** delete the cpu event from the global list. */
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~CpuEvent();
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/** Update all events switching old tc to new tc.
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* @param oldTc the old thread context we are switching from
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* @param newTc the new thread context we are switching to.
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*/
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static void replaceThreadContext(ThreadContext *oldTc,
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ThreadContext *newTc);
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};
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template <class T, void (T::* F)(ThreadContext *tc)>
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class CpuEventWrapper : public CpuEvent
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{
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private:
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T *object;
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public:
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CpuEventWrapper(T *obj, ThreadContext *_tc,
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EventQueue *q = &mainEventQueue, Priority p = Default_Pri)
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: CpuEvent(q, _tc, p), object(obj)
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{ }
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void process() { (object->*F)(tc); }
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};
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#endif // __CPU_CPUEVENT_HH__
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