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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "invokeservice.h"
#include "time.h"
#include <mutex>
#include <vector>
#include <thread>
#include <condition_variable>
namespace vespalib {
/**
* An invoke service what will invoke the given function with at specified frequency.
*/
class InvokeServiceImpl : public InvokeService {
public:
InvokeServiceImpl(duration napTime);
InvokeServiceImpl(const InvokeServiceImpl &) = delete;
InvokeServiceImpl & operator=(const InvokeServiceImpl &) = delete;
~InvokeServiceImpl() override;
std::unique_ptr<IDestructorCallback> registerInvoke(InvokeFunc func) override;
const std::atomic<steady_time> & nowRef() const { return _now; }
private:
using IdAndFunc = std::pair<uint64_t, InvokeFunc>;
class Registration;
void unregister(uint64_t id);
void runLoop();
duration _naptime;
std::atomic<steady_time> _now;
std::mutex _lock;
std::condition_variable _cond;
uint64_t _currId;
bool _closed;
std::vector<IdAndFunc> _toInvoke;
std::unique_ptr<std::thread> _thread;
};
}
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