54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* Copyright 2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef RING_BUFFER_H
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#define RING_BUFFER_H
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#include <OS.h>
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struct iovec;
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struct ring_buffer {
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int32 first;
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int32 in;
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int32 size;
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uint8 buffer[0];
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};
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// flags for create_ring_buffer_etc()
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#define RING_BUFFER_INIT_FROM_BUFFER 0x01
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ring_buffer *create_ring_buffer(size_t size);
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struct ring_buffer *create_ring_buffer_etc(void *memory, size_t size,
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uint32 flags);
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void delete_ring_buffer(struct ring_buffer *buffer);
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void ring_buffer_clear(struct ring_buffer *buffer);
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size_t ring_buffer_readable(struct ring_buffer *buffer);
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size_t ring_buffer_writable(struct ring_buffer *buffer);
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void ring_buffer_flush(struct ring_buffer *buffer, size_t bytes);
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size_t ring_buffer_read(struct ring_buffer *buffer, uint8 *data, ssize_t length);
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size_t ring_buffer_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length);
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ssize_t ring_buffer_user_read(struct ring_buffer *buffer, uint8 *data, ssize_t length);
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ssize_t ring_buffer_user_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length);
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size_t ring_buffer_peek(struct ring_buffer *buffer, size_t offset, void *data,
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size_t length);
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int32 ring_buffer_get_vecs(struct ring_buffer *buffer, struct iovec *vecs);
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#ifdef __cplusplus
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}
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#endif
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#endif /* RING_BUFFER_H */
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