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/*
* Copyright 2018 Google, Inc.
*
* 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.
*
* Authors: Gabe Black
*/
#ifndef __SYSTEMC_CORE_SCHED_EVENT_HH__
#define __SYSTEMC_CORE_SCHED_EVENT_HH__
#include <functional>
#include <list>
#include "base/types.hh"
namespace sc_gem5
{
class ScEvent;
typedef std::list<ScEvent *> ScEvents;
class ScEvent
{
private:
std::function<void()> work;
Tick _when;
ScEvents *_events;
ScEvents::iterator _it;
friend class Scheduler;
void
schedule(ScEvents &events, Tick w)
{
when(w);
assert(!scheduled());
_events = &events;
_events->push_back(this);
_it = _events->end();
_it--;
}
void
deschedule()
{
assert(scheduled());
_events->erase(_it);
_events = nullptr;
}
public:
ScEvent(std::function<void()> work) :
work(work), _when(MaxTick), _events(nullptr)
{}
~ScEvent();
bool scheduled() { return _events != nullptr; }
ScEvents *scheduledOn() { return _events; }
void when(Tick w) { _when = w; }
Tick when() { return _when; }
void run() { deschedule(); work(); }
};
} // namespace sc_gem5
#endif // __SYSTEMC_CORE_SCHED_EVENT_HH__
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