src/mem/ruby/eventqueue/RubyEventQueue.cc

   1 /*
   2  * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
   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
  29 #include <cassert>
  30
  31 #include "mem/ruby/common/Consumer.hh"
  32 #include "mem/ruby/eventqueue/RubyEventQueue.hh"
  33 #include "mem/ruby/eventqueue/RubyEventQueueNode.hh"
  34 #include "mem/ruby/system/System.hh"
  35
  36 RubyEventQueue::RubyEventQueue(EventQueue* eventq, Tick _clock)
  37   : EventManager(eventq), m_clock(_clock)
  38 {
  39 }
  40
  41 RubyEventQueue::~RubyEventQueue()
  42 {
  43 }
  44
  45 void
  46 RubyEventQueue::scheduleEvent(Consumer* consumer, Time timeDelta)
  47 {
  48     scheduleEventAbsolute(consumer, timeDelta + getTime());
  49 }
  50
  51 void
  52 RubyEventQueue::scheduleEventAbsolute(Consumer* consumer, Time timeAbs)
  53 {
  54     // Check to see if this is a redundant wakeup
  55     assert(consumer != NULL);
  56     if (!consumer->alreadyScheduled(timeAbs)) {
  57         // This wakeup is not redundant
  58         RubyEventQueueNode *thisNode = new RubyEventQueueNode(consumer, this);
  59         assert(timeAbs > getTime());
  60         schedule(thisNode, (timeAbs * m_clock));
  61         consumer->insertScheduledWakeupTime(timeAbs);
  62     }
  63 }
  64
  65 void
  66 RubyEventQueue::print(std::ostream& out) const
  67 {
  68     out << "[Event Queue:]";
  69 }