libcamera/vivid.git - libcamera pipeline handler for VIVID

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * message.cpp - Messages test
 */

#include <chrono>
#include <iostream>
#include <memory>
#include <thread>

#include <libcamera/base/message.h>
#include <libcamera/base/thread.h>

#include "test.h"

using namespace std;
using namespace libcamera;

class MessageReceiver : public Object
{
public:
	enum Status {
		NoMessage,
		InvalidThread,
		MessageReceived,
	};

	MessageReceiver(Object *parent = nullptr)
		: Object(parent), status_(NoMessage)
	{
	}

	Status status() const { return status_; }
	void reset() { status_ = NoMessage; }

protected:
	void message(Message *msg)
	{
		if (msg->type() != Message::None) {
			Object::message(msg);
			return;
		}

		if (thread() != Thread::current())
			status_ = InvalidThread;
		else
			status_ = MessageReceived;
	}

private:
	Status status_;
};

class RecursiveMessageReceiver : public Object
{
public:
	RecursiveMessageReceiver()
		: child_(this), success_(false)
	{
	}

	bool success() const { return success_; }

protected:
	void message([[maybe_unused]] Message *msg)
	{
		if (msg->type() != Message::None) {
			Object::message(msg);
			return;
		}

		child_.postMessage(std::make_unique<Message>(Message::None));

		/*
		 * If the child has already received the message, something is
		 * wrong.
		 */
		if (child_.status() != MessageReceiver::NoMessage)
			return;

		Thread::current()->dispatchMessages(Message::None);

		/* The child should now have received the message. */
		if (child_.status() == MessageReceiver::MessageReceived)
			success_ = true;
	}

private:
	MessageReceiver child_;
	bool success_;
};

class SlowMessageReceiver : public Object
{
protected:
	void message(Message *msg)
	{
		if (msg->type() != Message::None) {
			Object::message(msg);
			return;
		}

		/*
		 * Don't access any member of the object here (including the
		 * vtable) as the object will be deleted by the main thread
		 * while we're sleeping.
		 */


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