midibuf.c File Reference

#include <linux/stddef.h>
#include <linux/kmod.h>
#include <linux/spinlock.h>
#include "sound_config.h"

Go to the source code of this file.

Data Structures
struct	midi_buf
struct	midi_parms

Macros
#define	MIDIBUF_C
#define	MAX_QUEUE_SIZE   4000
#define	DATA_AVAIL(q)   (q->len)
#define	SPACE_AVAIL(q)   (MAX_QUEUE_SIZE - q->len)
#define	QUEUE_BYTE(q, data)
#define	REMOVE_BYTE(q, data)

Functions
int	MIDIbuf_open (int dev, struct file *file)
void	MIDIbuf_release (int dev, struct file *file)
int	MIDIbuf_write (int dev, struct file *file, const char __user *buf, int count)
int	MIDIbuf_read (int dev, struct file *file, char __user *buf, int count)
int	MIDIbuf_ioctl (int dev, struct file *file, unsigned int cmd, void __user *arg)
unsigned int	MIDIbuf_poll (int dev, struct file *file, poll_table *wait)
int	MIDIbuf_avail (int dev)
	EXPORT_SYMBOL (MIDIbuf_avail)

Macro Definition Documentation

#define DATA_AVAIL

(

q

)

(q->len)

Definition at line 58 of file midibuf.c.

#define MAX_QUEUE_SIZE   4000

Definition at line 28 of file midibuf.c.

#define MIDIBUF_C

Definition at line 19 of file midibuf.c.

#define QUEUE_BYTE	(		q,
			data
	)

Value:

if (SPACE_AVAIL(q)) \
    { \
      unsigned long flags; \
      spin_lock_irqsave(&lock, flags); \
      q->queue[q->tail] = (data); \
      q->len++; q->tail = (q->tail+1) % MAX_QUEUE_SIZE; \
      spin_unlock_irqrestore(&lock, flags); \
    }

Definition at line 61 of file midibuf.c.

#define REMOVE_BYTE	(		q,
			data
	)

Value:

if (DATA_AVAIL(q)) \
    { \
      unsigned long flags; \
      spin_lock_irqsave(&lock, flags); \
	  data = q->queue[q->head]; \
      q->len--; q->head = (q->head+1) % MAX_QUEUE_SIZE; \
      spin_unlock_irqrestore(&lock, flags); \
    }

Definition at line 71 of file midibuf.c.

#define SPACE_AVAIL

(

q

)

(MAX_QUEUE_SIZE - q->len)

Definition at line 59 of file midibuf.c.

Function Documentation

EXPORT_SYMBOL

(

MIDIbuf_avail

)

int MIDIbuf_avail

(

int

dev

)

Definition at line 418 of file midibuf.c.

int MIDIbuf_ioctl	(	int	dev,
		struct file *	file,
		unsigned int	cmd,
		void __user *	arg
	)

Definition at line 362 of file midibuf.c.

int MIDIbuf_open	(	int	dev,
		struct file *	file
	)

Definition at line 156 of file midibuf.c.

unsigned int MIDIbuf_poll	(	int	dev,
		struct file *	file,
		poll_table *	wait
	)

Definition at line 398 of file midibuf.c.

int MIDIbuf_read	(	int	dev,
		struct file *	file,
		char __user *	buf,
		int	count
	)

Definition at line 314 of file midibuf.c.

void MIDIbuf_release	(	int	dev,
		struct file *	file
	)

Definition at line 215 of file midibuf.c.

int MIDIbuf_write	(	int	dev,
		struct file *	file,
		const char __user *	buf,
		int	count
	)

Definition at line 260 of file midibuf.c.