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/*
* 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.
*/
/*
* $Id$
*/
#include "mem/ruby/eventqueue/RubyEventQueue.hh"
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/profiler/Profiler.hh"
#include "mem/ruby/system/System.hh"
#include "mem/gems_common/PrioHeap.hh"
#include "mem/ruby/eventqueue/RubyEventQueueNode.hh"
// Class public method definitions
RubyEventQueue theEventQueue;
RubyEventQueue::RubyEventQueue()
{
m_prio_heap_ptr = NULL;
init();
assert(g_eventQueue_ptr == NULL);
g_eventQueue_ptr = this;
}
RubyEventQueue::~RubyEventQueue()
{
delete m_prio_heap_ptr;
}
void RubyEventQueue::init()
{
m_globalTime = 1;
m_timeOfLastRecovery = 1;
m_prio_heap_ptr = new PrioHeap<RubyEventQueueNode>;
m_prio_heap_ptr->init();
}
bool RubyEventQueue::isEmpty() const
{
return (m_prio_heap_ptr->size() == 0);
}
void RubyEventQueue::scheduleEventAbsolute(Consumer* consumer, Time timeAbs)
{
// Check to see if this is a redundant wakeup
// Time time = timeDelta + m_globalTime;
ASSERT(consumer != NULL);
if (consumer->getLastScheduledWakeup() != timeAbs) {
// This wakeup is not redundant
RubyEventQueueNode thisNode;
thisNode.m_consumer_ptr = consumer;
assert(timeAbs > m_globalTime);
thisNode.m_time = timeAbs;
m_prio_heap_ptr->insert(thisNode);
consumer->setLastScheduledWakeup(timeAbs);
}
}
void RubyEventQueue::triggerEvents(Time t)
{
RubyEventQueueNode thisNode;
while(m_prio_heap_ptr->size() > 0 && m_prio_heap_ptr->peekMin().m_time <= t) {
m_globalTime = m_prio_heap_ptr->peekMin().m_time;
thisNode = m_prio_heap_ptr->extractMin();
assert(thisNode.m_consumer_ptr != NULL);
DEBUG_EXPR(EVENTQUEUE_COMP,MedPrio,*(thisNode.m_consumer_ptr));
DEBUG_EXPR(EVENTQUEUE_COMP,MedPrio,thisNode.m_time);
thisNode.m_consumer_ptr->triggerWakeup(this);
}
m_globalTime = t;
}
void RubyEventQueue::triggerAllEvents()
{
// FIXME - avoid repeated code
RubyEventQueueNode thisNode;
while(m_prio_heap_ptr->size() > 0) {
m_globalTime = m_prio_heap_ptr->peekMin().m_time;
thisNode = m_prio_heap_ptr->extractMin();
assert(thisNode.m_consumer_ptr != NULL);
DEBUG_EXPR(EVENTQUEUE_COMP,MedPrio,*(thisNode.m_consumer_ptr));
DEBUG_EXPR(EVENTQUEUE_COMP,MedPrio,thisNode.m_time);
thisNode.m_consumer_ptr->triggerWakeup(this);
}
}
// Class private method definitions
void
RubyEventQueue::print(ostream& out) const
{
out << "[Event Queue: " << *m_prio_heap_ptr << "]";
}
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