Robin E.R. Davies
116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) Robin E.R. Davies
|
|
* All rights reserved.
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
#include <queue>
|
|
#include <condition_variable>
|
|
#include <functional>
|
|
|
|
namespace pipedal
|
|
{
|
|
template <typename T>
|
|
class ThreadedQueue
|
|
{
|
|
public:
|
|
~ThreadedQueue() { Close(); }
|
|
|
|
void Put(std::shared_ptr<T> value)
|
|
{
|
|
{
|
|
std::lock_guard lock(mutex);
|
|
if (!closed)
|
|
{
|
|
queue.push(value);
|
|
}
|
|
}
|
|
read_cv.notify_one();
|
|
}
|
|
std::shared_ptr<T> Take()
|
|
{
|
|
while (true)
|
|
{
|
|
{
|
|
std::unique_lock lock(mutex);
|
|
read_cv.wait(lock,
|
|
[this]() {return !queue.empty() || closed;});
|
|
if (!queue.empty())
|
|
{
|
|
auto result = queue.front();
|
|
queue.pop();
|
|
return result;
|
|
}
|
|
else
|
|
{
|
|
if (closed)
|
|
{
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
void Close()
|
|
{
|
|
{
|
|
std::lock_guard lock{mutex};
|
|
closed = true;
|
|
}
|
|
read_cv.notify_all();
|
|
}
|
|
void CloseAndClear()
|
|
{
|
|
{
|
|
std::lock_guard lock{mutex};
|
|
closed = true;
|
|
while (!queue.empty())
|
|
{
|
|
queue.pop();
|
|
}
|
|
}
|
|
read_cv.notify_all();
|
|
}
|
|
void Erase(std::function<bool(std::shared_ptr<T> queueEntry)> predicate)
|
|
{
|
|
std::lock_guard lock{mutex};
|
|
std::queue<std::shared_ptr<T>> newQueue;
|
|
while (!queue.empty())
|
|
{
|
|
auto item = queue.front();
|
|
queue.pop();
|
|
if (!predicate(item))
|
|
{
|
|
newQueue.push(item);
|
|
}
|
|
}
|
|
queue = newQueue;
|
|
}
|
|
|
|
private:
|
|
bool closed = 0;
|
|
std::queue<std::shared_ptr<T>> queue;
|
|
std::mutex mutex;
|
|
std::condition_variable read_cv;
|
|
};
|
|
} |