C語言資料結構（環形緩衝區）

3.1、環形緩衝區初始化

int ringbufferinit(ringbuffer_t *ringbuf)

int isringbufferempty(ringbuffer_t *ringbuf)

int isringbufferfull(ringbuffer_t *ringbuf)

int ringbufferproduce(ringbuffer_t *ringbuf,char *buffer,int buffer_len)

int ringbufferconsum(ringbuffer_t *ringbuf,char *buffer,int buffer_len)

int ringbufferlength(ringbuffer_t *ringbuf)

int ringbufferfreespace(ringbuffer_t *ringbuf)

#ifndef _ringbuffer_h

#define _ringbuffer_h
#define max_buffer_len 1024
typedef enum;
typedef struct _ring_buf_ringbuffer_t;
int ringbufferinit(ringbuffer_t *ringbuf);
int isringbufferfull(ringbuffer_t *ringbuf);
int isringbufferempty(ringbuffer_t *ringbuf);
int ringbufferlength(ringbuffer_t *ringbuf);
int ringbufferfreespace(ringbuffer_t *ringbuf);
int ringbufferproduce(ringbuffer_t *ringbuf,char *buffer,int buffer_len);
int ringbufferconsum(ringbuffer_t *ringbuf,char *buffer,int buffer_len);
#endif

#include #include #include #include #include #include #include "ringbuffer.h"

typedef structmem_data_t;
int main(int arcv,char *ar**)
shmid = shmget(key,4096,0666|ipc_creat);
if(shmid < 0)
data = shmat(shmid,null,0);
if(null == data)
printf("key:%x,shmid:%d,addr:%p\r\n",key,shmid,data);
if(0 == strncmp(ar**[1],"read",4))//出隊
sleep(1);
} }else
while(1)
}ret = shmctl(shmid,0,ipc_rmid);//刪除共享記憶體
if(ret<0)
return 0;
}

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