cpuevent.hh revision 3886:d55c97419444
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: Ali Saidi 29 */ 30 31#ifndef __CPU_CPUEVENT_HH__ 32#define __CPU_CPUEVENT_HH__ 33 34#include <vector> 35#include "sim/eventq.hh" 36 37class ThreadContext; 38 39/** 40 * This class creates a global list of events that need a pointer to a 41 * thread context. When a switchover takes place the events can be 42 * migrated to the new thread context, otherwise you could have a wake 43 * timer interrupt go off on a switched out cpu or other unfortunate 44 * events. This object MUST be dynamically allocated to avoid it being 45 * deleted after a cpu switch happens. 46 */ 47class CpuEvent : public Event 48{ 49 protected: 50 /** type of global list of cpu events. */ 51 typedef std::vector<CpuEvent *> CpuEventList; 52 53 /** Static list of cpu events that is searched every time a cpu switch 54 * happens. */ 55 static CpuEventList cpuEventList; 56 57 /** The thread context that is switched to the new cpus. */ 58 ThreadContext *tc; 59 60 public: 61 CpuEvent(EventQueue *q, ThreadContext *_tc, Priority p = Default_Pri) 62 : Event(q, p), tc(_tc) 63 { cpuEventList.push_back(this); } 64 65 /** delete the cpu event from the global list. */ 66 ~CpuEvent(); 67 68 /** Update all events switching old tc to new tc. 69 * @param oldTc the old thread context we are switching from 70 * @param newTc the new thread context we are switching to. 71 */ 72 static void replaceThreadContext(ThreadContext *oldTc, 73 ThreadContext *newTc); 74}; 75 76template <class T, void (T::* F)(ThreadContext *tc)> 77class CpuEventWrapper : public CpuEvent 78{ 79 private: 80 T *object; 81 82 public: 83 CpuEventWrapper(T *obj, ThreadContext *_tc, 84 EventQueue *q = &mainEventQueue, Priority p = Default_Pri) 85 : CpuEvent(q, _tc, p), object(obj) 86 { } 87 void process() { (object->*F)(tc); } 88}; 89 90#endif // __CPU_CPUEVENT_HH__ 91 92