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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "WorkQueue.h"
#include <cassert>
namespace neurun
{
namespace exec
{
WorkQueue::~WorkQueue()
{
{
std::unique_lock<std::mutex> lock(_mu);
_state = State::FORCE_FINISHING;
}
_cv.notify_all();
}
void WorkQueue::operator()()
{
while (true)
{
std::unique_ptr<IFunction> fn = nullptr;
{
std::unique_lock<std::mutex> lock{_mu};
_cv.wait(lock, [this] {
return (_state == State::FORCE_FINISHING) || (_state == State::FINISHING) ||
(_state == State::ONLINE && !_functions.empty());
});
if (_state == State::FORCE_FINISHING)
{
assert(_functions.empty() && "Terminating with unfinished jobs");
return;
}
else if (_state == State::FINISHING && _functions.empty())
{
return;
}
else
{
assert(((_state == State::FINISHING) || (_state == State::ONLINE)) && !_functions.empty());
fn = std::move(_functions.front());
_functions.pop();
}
}
assert(fn);
fn->run();
}
}
void WorkQueue::enqueue(std::unique_ptr<IFunction> &&fn)
{
{
std::unique_lock<std::mutex> lock{_mu};
_functions.emplace(std::move(fn));
}
_cv.notify_one();
}
void WorkQueue::terminate()
{
{
std::unique_lock<std::mutex> lock{_mu};
_state = State::FORCE_FINISHING;
}
_cv.notify_all();
}
void WorkQueue::finish()
{
{
std::unique_lock<std::mutex> lock{_mu};
_state = State::FINISHING;
}
_cv.notify_all();
}
uint32_t WorkQueue::numJobsInQueue()
{
std::unique_lock<std::mutex> lock{_mu};
return _functions.size();
}
} // namespace exec
} // namespace neurun
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