lwbt/btpbuf.h

   1 #ifndef __BTPBUF_H__
   2 #define __BTPBUF_H__
   3
   4 #include "bt.h"
   5
   6 /* Definitions for the pbuf flag field. These are NOT the flags that
   7  * are passed to pbuf_alloc(). */
   8 #define PBUF_FLAG_RAM   0x00U    /* Flags that pbuf data is stored in RAM */
   9 #define PBUF_FLAG_ROM   0x01U    /* Flags that pbuf data is stored in ROM */
  10 #define PBUF_FLAG_POOL  0x02U    /* Flags that the pbuf comes from the pbuf pool */
  11 #define PBUF_FLAG_REF   0x04U    /* Flags thet the pbuf payload refers to RAM */
  12
  13 typedef enum {
  14         PBUF_TRANSPORT,
  15         PBUF_LINK,
  16         PBUF_RAW
  17 } pbuf_layer;
  18
  19 typedef enum {
  20         PBUF_POOL,
  21         PBUF_RAM,
  22         PBUF_ROM,
  23         PBUF_REF
  24 } pbuf_flag;
  25
  26 struct pbuf {
  27         struct pbuf *next;
  28         void *payload;
  29         u16_t tot_len;
  30         u16_t len;
  31         u16_t flags;
  32         u16_t ref;
  33 };
  34
  35 void btpbuf_init();
  36 struct pbuf* btpbuf_alloc(pbuf_layer layer,u16_t len,pbuf_flag flag);
  37 u8_t btpbuf_free(struct pbuf *p);
  38 void btpbuf_realloc(struct pbuf *p,u16_t new_len);
  39 u8_t btpbuf_header(struct pbuf *p,s16_t hdr_size_inc);
  40 void btpbuf_cat(struct pbuf *h,struct pbuf *t);
  41 u8_t btpbuf_clen(struct pbuf *p);
  42 void btpbuf_queue(struct pbuf *p,struct pbuf *n);
  43 void btpbuf_ref(struct pbuf *p);
  44 void btpbuf_chain(struct pbuf *h,struct pbuf *t);
  45 struct pbuf* btpbuf_dequeue(struct pbuf *p);
  46 struct pbuf* btpbuf_dechain(struct pbuf *p);
  47 struct pbuf* btpbuf_take(struct pbuf *p);
  48
  49 #endif