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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "handler.h"
#include <vespa/vespalib/util/arrayqueue.hpp>
#include <vespa/vespalib/util/thread.h>
#include <vespa/vespalib/util/runnable.h>
#include <condition_variable>
namespace vbench {
/**
* A Handler that will forward incoming objects to another handler in
* a separate thread. All objects are forwarded using the same thread,
* reducing the need for synchronization in the handler forwarded
* to. A call to join will wait until all queued object have been
* forwarded. Object obtained after join is invoked will be discarded.
**/
template <typename T>
class HandlerThread : public Handler<T>,
public vespalib::Runnable
{
private:
std::mutex _lock;
std::condition_variable _cond;
vespalib::ArrayQueue<std::unique_ptr<T> > _queue;
Handler<T> &_next;
std::thread _thread;
bool _done;
void run() override;
public:
HandlerThread(Handler<T> &next, init_fun_t init_fun);
~HandlerThread();
void handle(std::unique_ptr<T> obj) override;
void join();
};
} // namespace vbench
#include "handler_thread.hpp"
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