40 lines
860 B
C
40 lines
860 B
C
/**
|
|
* @file event_buffer.h
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon <levon@movementarian.org>
|
|
*/
|
|
|
|
#ifndef EVENT_BUFFER_H
|
|
#define EVENT_BUFFER_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/mutex.h>
|
|
|
|
int alloc_event_buffer(void);
|
|
|
|
void free_event_buffer(void);
|
|
|
|
/**
|
|
* Add data to the event buffer.
|
|
* The data passed is free-form, but typically consists of
|
|
* file offsets, dcookies, context information, and ESCAPE codes.
|
|
*/
|
|
void add_event_entry(unsigned long data);
|
|
|
|
/* wake up the process sleeping on the event file */
|
|
void wake_up_buffer_waiter(void);
|
|
|
|
#define INVALID_COOKIE ~0UL
|
|
#define NO_COOKIE 0UL
|
|
|
|
extern const struct file_operations event_buffer_fops;
|
|
|
|
/* mutex between sync_cpu_buffers() and the
|
|
* file reading code.
|
|
*/
|
|
extern struct mutex buffer_mutex;
|
|
|
|
#endif /* EVENT_BUFFER_H */
|