STM32

分享一个ringbuffer C程序

2019-12-12 18:10发布

站内问答 / STM32/STM8
14215 16 17
分享一个ringbuffer C程序
ringbuffer.h
  1. #ifndef __RINGBUFFER_H__
  2. #define __RINGBUFFER_H__

  4. #include <stdint.h>

  6. typedef struct RingBuffer_s {
  7.         char * Head;
  8.         char * Tail;
  9.         char * Start;
  10.         char * End;
  11. } RingBuffer_t;

  13. uint8_t rb_Get(RingBuffer_t *rb, char * c);
  14. uint8_t rb_Put(RingBuffer_t *rb, char c);
  15. void    rb_Init(RingBuffer_t *rb, char * buffer, int size);

  17. #endif
复制代码
ringbuffer.c
  1. #include "ring_buffer.h"

  3. uint8_t rb_Put(RingBuffer_t *rb, char c)
  4. {
  5.         char *next = rb->Head + 1;
  6.         if (next == rb->End)
  7.                 next = rb->Start;
  8.         if (next == rb->Tail)
  9.                 return 0;
  10.         *rb->Head = c;
  11.         rb->Head = next;
  12.         return 1;
  13. }

  15. uint8_t rb_Get(RingBuffer_t *rb, char * c)
  16. {
  17.         char *next;
  18.         if (rb->Tail == rb->Head)        // No data in ring
  19.         {
  20.                 *c = 0;
  21.                 return 0;
  22.         }
  23.         *c = *rb->Tail;                                // Get data and move to next
  24.         next = rb->Tail + 1;
  25.         if (next == rb->End)                // Check for ring
  26.                 next = rb->Start;
  27.         rb->Tail = next;
  28.         return 1;
  29. }

  31. void rb_Init(RingBuffer_t *rb, char * buffer, int size)
  32. {
  33.         rb->Tail = rb->Head = rb->Start = buffer;
  34.         rb->End = buffer + size;
  35. }
复制代码
友情提示: 此问题已得到解决，问题已经关闭,关闭后问题禁止继续编辑，回答。
16条回答
colinzhao
2019-12-14 02:51
还是搞结构体好

一周热门 更多>