49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#pragma once
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#include <cstddef>
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#include <atomic>
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namespace tc {
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class ring_buffer {
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public:
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/* Attention: Actual size may be larger than given capacity */
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explicit ring_buffer(size_t /* minimum capacity */);
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~ring_buffer();
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[[nodiscard]] size_t capacity() const;
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[[nodiscard]] size_t fill_count() const;
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[[nodiscard]] size_t free_count() const;
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/* do not write more than the capacity! */
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char* write_ptr();
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void advance_write_ptr(size_t /* count */);
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/* do not read more than the capacity! */
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[[nodiscard]] const void* read_ptr() const;
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void advance_read_ptr(size_t /* count */);
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void clear();
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[[nodiscard]] bool valid() const;
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[[nodiscard]] inline operator bool() const { return this->valid(); }
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private:
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#ifndef HAVE_SOUNDIO
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struct MirroredMemory {
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size_t capacity;
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char *address;
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void *priv;
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};
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bool allocate_memory(size_t requested_capacity);
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void free_memory();
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MirroredMemory memory{};
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std::atomic_long write_offset{};
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std::atomic_long read_offset{};
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size_t _capacity{0}; /* for faster access */
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#endif
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void* handle{nullptr};
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};
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} |