39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
#ifndef _KERNEL_ALGO_RINGBUFFER_H
|
|
#define _KERNEL_ALGO_RINGBUFFER_H
|
|
|
|
#include <libkern/libkern.h>
|
|
#include <libkern/lock.h>
|
|
#include <mem/kmemzone.h>
|
|
|
|
#define RINGBUFFER_STD_SIZE (16 * KB)
|
|
|
|
struct __ringbuffer {
|
|
kmemzone_t zone;
|
|
size_t start;
|
|
size_t end;
|
|
};
|
|
typedef struct __ringbuffer ringbuffer_t;
|
|
|
|
ringbuffer_t ringbuffer_create(size_t size);
|
|
static ALWAYS_INLINE ringbuffer_t ringbuffer_create_std() { return ringbuffer_create(RINGBUFFER_STD_SIZE); }
|
|
void ringbuffer_free(ringbuffer_t* rbuf);
|
|
|
|
ssize_t ringbuffer_space_to_read_from(ringbuffer_t* rbuf, size_t start);
|
|
ssize_t ringbuffer_space_to_read(ringbuffer_t* rbuf);
|
|
ssize_t ringbuffer_space_to_write(ringbuffer_t* rbuf);
|
|
|
|
size_t ringbuffer_read_from(ringbuffer_t* rbuf, size_t ustart, uint8_t __user* buf, size_t siz);
|
|
size_t ringbuffer_read_user_from(ringbuffer_t* rbuf, size_t ustart, uint8_t __user* buf, size_t siz);
|
|
size_t ringbuffer_read(ringbuffer_t* rbuf, uint8_t*, size_t);
|
|
size_t ringbuffer_read_user(ringbuffer_t* rbuf, uint8_t __user* buf, size_t siz);
|
|
|
|
size_t ringbuffer_write(ringbuffer_t* rbuf, const uint8_t*, size_t);
|
|
size_t ringbuffer_write_user(ringbuffer_t* rbuf, const uint8_t __user* buf, size_t siz);
|
|
size_t ringbuffer_write_ignore_bounds(ringbuffer_t* rbuf, const uint8_t* buf, size_t siz);
|
|
size_t ringbuffer_write_user_ignore_bounds(ringbuffer_t* rbuf, const uint8_t* __user buf, size_t siz);
|
|
|
|
size_t ringbuffer_read_one(ringbuffer_t* rbuf, uint8_t* data);
|
|
size_t ringbuffer_write_one(ringbuffer_t* rbuf, uint8_t data);
|
|
void ringbuffer_clear(ringbuffer_t* rbuf);
|
|
|
|
#endif //_KERNEL_ALGO_RINGBUFFER_H
|