1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2003 4 * Gerry Hamel, geh (at) ti.com, Texas Instruments 5 */ 6 7 #ifndef __CIRCBUF_H__ 8 #define __CIRCBUF_H__ 9 10 typedef struct circbuf { 11 unsigned int size; /* current number of bytes held */ 12 unsigned int totalsize; /* number of bytes allocated */ 13 14 char *top; /* pointer to current buffer start */ 15 char *tail; /* pointer to space for next element */ 16 17 char *data; /* all data */ 18 char *end; /* end of data buffer */ 19 } circbuf_t; 20 21 int buf_init (circbuf_t * buf, unsigned int size); 22 int buf_free (circbuf_t * buf); 23 int buf_pop (circbuf_t * buf, char *dest, unsigned int len); 24 int buf_push (circbuf_t * buf, const char *src, unsigned int len); 25 26 #endif 27
