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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Badge.h>
#include <AK/CircularQueue.h>
#include <AK/WeakPtr.h>
#include <Kernel/API/InodeWatcherEvent.h>
#include <Kernel/FileSystem/File.h>
#include <Kernel/Lock.h>
namespace Kernel {
class Inode;
class InodeWatcher final : public File {
public:
static NonnullRefPtr<InodeWatcher> create(Inode&);
virtual ~InodeWatcher() override;
virtual bool can_read(const FileDescription&, size_t) const override;
virtual bool can_write(const FileDescription&, size_t) const override;
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual String absolute_path(const FileDescription&) const override;
virtual const char* class_name() const override { return "InodeWatcher"; };
void notify_inode_event(Badge<Inode>, InodeWatcherEvent::Type);
void notify_child_added(Badge<Inode>, const InodeIdentifier& child_id);
void notify_child_removed(Badge<Inode>, const InodeIdentifier& child_id);
private:
explicit InodeWatcher(Inode&);
Lock m_lock;
WeakPtr<Inode> m_inode;
CircularQueue<InodeWatcherEvent, 32> m_queue;
};
}
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