c_cpp/lib/uthash/src/ringbuf.h

   1 #ifndef _RINGBUF_H_
   2 #define _RINGBUF_H_
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <assert.h>
   7
   8 /* simple ring buffer */
   9
  10 typedef struct _ringbuf {
  11     size_t n; /* allocd size */
  12     size_t u; /* used space */
  13     size_t i; /* input pos */
  14     size_t o; /* output pos */
  15     char d[]; /* C99 flexible array member */
  16 } ringbuf;
  17
  18 ringbuf *ringbuf_new(size_t sz);
  19 int ringbuf_put(ringbuf *r, const void *data, size_t len);
  20 size_t ringbuf_get_pending_size(ringbuf *r);
  21 size_t ringbuf_get_next_chunk(ringbuf *r, char **data);
  22 void ringbuf_mark_consumed(ringbuf *r, size_t len);
  23 void ringbuf_free(ringbuf *r);
  24 void ringbuf_clear(ringbuf *r);
  25
  26 #endif /* _RINGBUF_H_ */