test/object-delete.cpp

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2020, Google Inc.
 *
 * object.cpp - Object deletion tests
 */

#include <iostream>

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

#include "test.h"

using namespace std;
using namespace libcamera;

class TestObject : public Object
{
public:
	TestObject(unsigned int *count)
		: deleteCount_(count)
	{
	}

	~TestObject()
	{
		/* Count the deletions from the correct thread. */
		if (thread() == Thread::current())
			(*deleteCount_)++;
	}

	unsigned int *deleteCount_;
};

class NewThread : public Thread
{
public:
	NewThread(Object *obj)
		: object_(obj)
	{
	}

protected:
	void run()
	{
		object_->deleteLater();
	}

private:
	Object *object_;
};

class ObjectDeleteTest : public Test
{
protected:
	int run()
	{
		/*
		 * Test that deferred deletion is executed from the object's
		 * thread, not the caller's thread.
		 */
		unsigned int count = 0;
		TestObject *obj = new TestObject(&count);

		NewThread thread(obj);
		thread.start();
		thread.wait();

		Thread::current()->dispatchMessages(Message::Type::DeferredDelete);

		if (count != 1) {
			cout << "Failed to dispatch DeferredDelete (" << count << ")" << endl;
			return TestFail;
		}

		/*
		 * Test that multiple calls to deleteLater() delete the object
		 * once only.
		 */
		count = 0;
		obj = new TestObject(&count);
		obj->deleteLater();
		obj->deleteLater();

		Thread::current()->dispatchMessages(Message::Type::DeferredDelete);
		if (count != 1) {
			cout << "Multiple deleteLater() failed (" << count << ")" << endl;
			return TestFail;
		}

		return TestPass;
	}
};

TEST_REGISTER(ObjectDeleteTest)