| /* |
| * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood |
| * 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. |
| */ |
| |
| /* |
| * The RubyEventQueue class implements an event queue which |
| * can be trigger events, allowing our simulation to be event driven. |
| * |
| * Currently, the only event we support is a Consumer being signaled |
| * by calling the consumer's wakeup() routine. Adding the event to |
| * the queue does not require a virtual function call, though calling |
| * wakeup() is a virtual function call. |
| * |
| * The method triggerEvents() is called with a global time. All |
| * events which are before or at this time are triggered in timestamp |
| * order. No ordering is enforced for events scheduled to occur at |
| * the same time. Events scheduled to wakeup the same consumer at the |
| * same time are combined into a single event. |
| * |
| * The method scheduleConsumerWakeup() is called with a global time |
| * and a consumer pointer. The event queue will call the wakeup() |
| * method of the consumer at the appropriate time. |
| * |
| * This implementation of RubyEventQueue uses a dynamically sized array |
| * managed as a heap. The algorithms used has O(lg n) for insert and |
| * O(lg n) for extract minimum element. (Based on chapter 7 of Cormen, |
| * Leiserson, and Rivest.) The array is dynamically sized and is |
| * automatically doubled in size when necessary. |
| * |
| */ |
| |
| #ifndef __MEM_RUBY_EVENTQUEUE_RUBYEVENTQUEUE_HH__ |
| #define __MEM_RUBY_EVENTQUEUE_RUBYEVENTQUEUE_HH__ |
| |
| #include <iostream> |
| |
| #include "mem/ruby/common/TypeDefines.hh" |
| #include "sim/eventq.hh" |
| |
| class Consumer; |
| class RubyEventQueueNode; |
| |
| class RubyEventQueue : public EventManager |
| { |
| public: |
| RubyEventQueue(EventQueue* eventq, Tick _clock); |
| ~RubyEventQueue(); |
| |
| Time getTime() const { return curTick()/m_clock; } |
| Tick getClock() const { return m_clock; } |
| void scheduleEvent(Consumer* consumer, Time timeDelta); |
| void scheduleEventAbsolute(Consumer* consumer, Time timeAbs); |
| void print(std::ostream& out) const; |
| |
| private: |
| // Private copy constructor and assignment operator |
| RubyEventQueue(const RubyEventQueue& obj); |
| RubyEventQueue& operator=(const RubyEventQueue& obj); |
| |
| // Data Members (m_ prefix) |
| Tick m_clock; |
| }; |
| |
| inline std::ostream& |
| operator<<(std::ostream& out, const RubyEventQueue& obj) |
| { |
| obj.print(out); |
| out << std::flush; |
| return out; |
| } |
| |
| #endif // __MEM_RUBY_EVENTQUEUE_RUBYEVENTQUEUE_HH__ |