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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/String.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel {
class RingBuffer {
public:
RingBuffer(String region_name, size_t capacity);
bool has_space() const { return m_num_used_bytes < m_capacity_in_bytes; }
bool copy_data_in(const UserOrKernelBuffer& buffer, size_t offset, size_t length, PhysicalAddress& start_of_copied_data, size_t& bytes_copied);
void reclaim_space(PhysicalAddress chunk_start, size_t chunk_size);
PhysicalAddress start_of_used() const;
SpinLock<u8>& lock() { return m_lock; }
private:
OwnPtr<Region> m_region;
SpinLock<u8> m_lock;
size_t m_start_of_used {};
size_t m_num_used_bytes {};
size_t m_capacity_in_bytes {};
};
}
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