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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
*/
#include "systemc/core/event.hh"
#include <algorithm>
#include <cstring>
#include <utility>
#include "base/logging.hh"
#include "sim/core.hh"
#include "systemc/core/module.hh"
#include "systemc/core/scheduler.hh"
#include "systemc/ext/core/sc_main.hh"
#include "systemc/ext/core/sc_module.hh"
namespace sc_gem5
{
Event::Event(sc_core::sc_event *_sc_event) : Event(_sc_event, nullptr) {}
Event::Event(sc_core::sc_event *_sc_event, const char *_basename_cstr) :
_sc_event(_sc_event), _basename(_basename_cstr ? _basename_cstr : ""),
delayedNotify([this]() { this->notify(); }), _triggeredStamp(~0ULL)
{
Module *p = currentModule();
if (_basename == "" && ::sc_core::sc_is_running())
_basename = ::sc_core::sc_gen_unique_name("event");
if (p)
parent = p->obj()->sc_obj();
else if (scheduler.current())
parent = scheduler.current();
else
parent = nullptr;
std::string original_name = _basename;
_basename = pickUniqueName(parent, _basename);
if (parent) {
Object *obj = Object::getFromScObject(parent);
obj->addChildEvent(_sc_event);
} else {
topLevelEvents.emplace(topLevelEvents.end(), _sc_event);
}
std::string path = parent ? (std::string(parent->name()) + ".") : "";
if (original_name != "" && _basename != original_name) {
std::string message = path + original_name +
". Latter declaration will be renamed to " +
path + _basename;
SC_REPORT_WARNING("(W505) object already exists", message.c_str());
}
_name = path + _basename;
allEvents.emplace(allEvents.end(), _sc_event);
// Determine if we're in the hierarchy (created once initialization starts
// means no).
}
Event::~Event()
{
if (parent) {
Object *obj = Object::getFromScObject(parent);
obj->delChildEvent(_sc_event);
} else {
EventsIt it = find(topLevelEvents.begin(), topLevelEvents.end(),
_sc_event);
assert(it != topLevelEvents.end());
std::swap(*it, topLevelEvents.back());
topLevelEvents.pop_back();
}
EventsIt it = findEvent(_name);
std::swap(*it, allEvents.back());
allEvents.pop_back();
if (delayedNotify.scheduled())
scheduler.deschedule(&delayedNotify);
}
const std::string &
Event::name() const
{
return _name;
}
const std::string &
Event::basename() const
{
return _basename;
}
bool
Event::inHierarchy() const
{
return _name.length() != 0;
}
sc_core::sc_object *
Event::getParentObject() const
{
return parent;
}
void
Event::notify(StaticSensitivities &senses)
{
for (auto s: senses)
s->notify(this);
}
void
Event::notify(DynamicSensitivities &senses)
{
int size = senses.size();
int pos = 0;
while (pos < size) {
if (senses[pos]->notify(this))
senses[pos] = senses[--size];
else
pos++;
}
senses.resize(size);
}
void
Event::notify(ResetSensitivities &senses)
{
for (auto s: senses)
s->notify(this);
}
void
Event::notify()
{
if (scheduler.inUpdate()) {
SC_REPORT_ERROR("(E521) immediate notification is not allowed "
"during update phase or elaboration", "");
}
// An immediate notification overrides any pending delayed notification.
if (delayedNotify.scheduled())
scheduler.deschedule(&delayedNotify);
_triggeredStamp = scheduler.changeStamp();
notify(resetSense);
notify(staticSenseMethod);
notify(dynamicSenseMethod);
notify(staticSenseThread);
notify(dynamicSenseThread);
}
void
Event::notify(const sc_core::sc_time &t)
{
if (delayedNotify.scheduled()) {
if (scheduler.delayed(t) >= delayedNotify.when())
return;
scheduler.deschedule(&delayedNotify);
}
scheduler.schedule(&delayedNotify, t);
}
void
Event::cancel()
{
if (delayedNotify.scheduled())
scheduler.deschedule(&delayedNotify);
}
bool
Event::triggered() const
{
return _triggeredStamp == scheduler.changeStamp();
}
Events topLevelEvents;
Events allEvents;
EventsIt
findEvent(const std::string &name)
{
EventsIt it;
for (it = allEvents.begin(); it != allEvents.end(); it++)
if (!strcmp((*it)->name(), name.c_str()))
break;
return it;
}
} // namespace sc_gem5
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