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Added a simple ring buffer implementation to be used by the mouse

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and keyboard drivers, as well as pipefs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12357 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2005-04-13 12:57:42 +00:00
parent 709bbb9ea3
commit ef2b38e7a9
3 changed files with 243 additions and 0 deletions
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headers/private/kernel/util/ring_buffer.h
+34
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/*
* Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef RING_BUFFER_H
#define RING_BUFFER_H
#include <OS.h>
struct ring_buffer;
#ifdef __cplusplus
extern "C" {
#endif
struct ring_buffer *create_ring_buffer(size_t size);
void delete_ring_buffer(struct ring_buffer *buffer);
void ring_buffer_clear(struct ring_buffer *buffer);
size_t ring_buffer_readable(struct ring_buffer *buffer);
size_t ring_buffer_writable(struct ring_buffer *buffer);
void ring_buffer_flush(struct ring_buffer *buffer, size_t bytes);
size_t ring_buffer_read(struct ring_buffer *buffer, uint8 *data, ssize_t length);
size_t ring_buffer_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length);
ssize_t ring_buffer_user_read(struct ring_buffer *buffer, uint8 *data, ssize_t length);
ssize_t ring_buffer_user_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length);
#ifdef __cplusplus
}
#endif
#endif /* RING_BUFFER_H */