blob: 0180236305992d390715e640b3805ec21bcd94a5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/**
* @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 <asm/semaphore.h>
int alloc_event_buffer(void);
void free_event_buffer(void);
/* wake up the process sleeping on the event file */
void wake_up_buffer_waiter(void);
/* Each escaped entry is prefixed by ESCAPE_CODE
* then one of the following codes, then the
* relevant data.
*/
#define ESCAPE_CODE ~0UL
#define CTX_SWITCH_CODE 1
#define CPU_SWITCH_CODE 2
#define COOKIE_SWITCH_CODE 3
#define KERNEL_ENTER_SWITCH_CODE 4
#define KERNEL_EXIT_SWITCH_CODE 5
#define MODULE_LOADED_CODE 6
#define CTX_TGID_CODE 7
#define TRACE_BEGIN_CODE 8
#define TRACE_END_CODE 9
#define INVALID_COOKIE ~0UL
#define NO_COOKIE 0UL
/* add data to the event buffer */
void add_event_entry(unsigned long data);
extern struct file_operations event_buffer_fops;
/* mutex between sync_cpu_buffers() and the
* file reading code.
*/
extern struct semaphore buffer_sem;
#endif /* EVENT_BUFFER_H */
|
