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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/RefPtr.h>
#include <AK/Try.h>
#include <AK/Types.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/OpenFileDescription.h>
#include <Kernel/FileSystem/SysFS/Component.h>
#include <Kernel/Library/KBufferBuilder.h>
#include <Kernel/Library/UserOrKernelBuffer.h>
#include <Kernel/Locking/Mutex.h>
namespace Kernel {
class SysFSGlobalInformation : public SysFSComponent {
public:
virtual ErrorOr<size_t> read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* description) const override;
protected:
explicit SysFSGlobalInformation(SysFSDirectory const& parent_directory);
virtual ErrorOr<void> refresh_data(OpenFileDescription&) const override;
virtual ErrorOr<void> try_generate(KBufferBuilder&) = 0;
virtual bool is_readable_by_jailed_processes() const { return false; }
mutable Mutex m_refresh_lock;
};
}
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