fifo.h

来自「ARM嵌入式应用开发典型实例配书光盘,希望对你有用！」· C头文件 代码 · 共 32 行

#ifndef __FIFO_H__
#define	__FIFO_H__

typedef	void	*HFIFO;

#define	FIFO_FLG_NOBLOCK	1
#define	FIFO_FLG_BLOCK		0

#define	E_COMMON		-1
#define	E_BUSY			-2
#define	E_FIFO_FULL		-3
#define	E_FIFO_EMPTY		-4
#define	E_FIFO_OVERSIZE		-5

/* Create and destroy FIFO */
HFIFO fifo_create(const char *fifoname, int nslot, size_t slotsz);
void  fifo_destroy(HFIFO handle);

/* Get an existing FIFO handle */
HFIFO fifo_find_handle(const char *fifoname, size_t *pslotsz);

/* Put and get data from FIFO */
int fifo_put(HFIFO handle, void *data, size_t size, int flag);
int fifo_get(HFIFO handle, void *buf,  size_t size, int flag);

/* Tag trigger and reset */
int fifo_tag_trigger(HFIFO handle, int tagid);
int fifo_tag_check(HFIFO handle, int tagid);

#endif