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55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
#pragma once
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#include "util/types.hpp"
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#include "util/atomic.hpp"
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#include <vector>
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// Single reader/writer simple ringbuffer.
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class simple_ringbuf
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{
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public:
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simple_ringbuf(u64 size = 0);
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virtual ~simple_ringbuf();
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simple_ringbuf(const simple_ringbuf& other);
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simple_ringbuf& operator=(const simple_ringbuf& other);
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// Thread unsafe functions.
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simple_ringbuf(simple_ringbuf&& other);
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simple_ringbuf& operator=(simple_ringbuf&& other);
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void set_buf_size(u64 size);
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// Helper functions
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u64 get_free_size() const;
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u64 get_used_size() const;
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u64 get_total_size() const;
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// Writer functions
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u64 push(const void* data, u64 size, bool force = false);
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void writer_flush(u64 cnt = umax);
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// Reader functions
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u64 pop(void* data, u64 size, bool force = false);
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void reader_flush(u64 cnt = umax);
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private:
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struct ctr_state
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{
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alignas(sizeof(u64) * 2)
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u64 read_ptr = 0;
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u64 write_ptr = 0;
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auto operator<=>(const ctr_state& other) const = default;
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};
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static_assert(sizeof(ctr_state) == sizeof(u64) * 2);
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atomic_t<ctr_state> rw_ptr{};
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std::vector<u8> buf{};
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u64 get_free_size(ctr_state val) const;
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u64 get_used_size(ctr_state val) const;
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};
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