1 /* 2 * Copyright 2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef RING_BUFFER_H 6 #define RING_BUFFER_H 7 8 9 #include <OS.h> 10 11 12 struct ring_buffer { 13 int32 first; 14 int32 in; 15 int32 size; 16 uint8 buffer[0]; 17 }; 18 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 struct ring_buffer *create_ring_buffer(size_t size); 25 void delete_ring_buffer(struct ring_buffer *buffer); 26 27 void ring_buffer_clear(struct ring_buffer *buffer); 28 size_t ring_buffer_readable(struct ring_buffer *buffer); 29 size_t ring_buffer_writable(struct ring_buffer *buffer); 30 void ring_buffer_flush(struct ring_buffer *buffer, size_t bytes); 31 size_t ring_buffer_read(struct ring_buffer *buffer, uint8 *data, ssize_t length); 32 size_t ring_buffer_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length); 33 ssize_t ring_buffer_user_read(struct ring_buffer *buffer, uint8 *data, ssize_t length); 34 ssize_t ring_buffer_user_write(struct ring_buffer *buffer, const uint8 *data, ssize_t length); 35 36 #ifdef __cplusplus 37 } 38 #endif 39 40 #endif /* RING_BUFFER_H */ 41