4 * @remark Copyright 2002 OProfile authors
5 * @remark Read the file COPYING
7 * @author John Levon <levon@movementarian.org>
10 #ifndef EVENT_BUFFER_H
11 #define EVENT_BUFFER_H
13 #include <linux/types.h>
14 #include <asm/mutex.h>
16 int alloc_event_buffer(void);
18 void free_event_buffer(void);
20 /* wake up the process sleeping on the event file */
21 void wake_up_buffer_waiter(void);
23 /* Each escaped entry is prefixed by ESCAPE_CODE
24 * then one of the following codes, then the
27 #define ESCAPE_CODE ~0UL
28 #define CTX_SWITCH_CODE 1
29 #define CPU_SWITCH_CODE 2
30 #define COOKIE_SWITCH_CODE 3
31 #define KERNEL_ENTER_SWITCH_CODE 4
32 #define KERNEL_EXIT_SWITCH_CODE 5
33 #define MODULE_LOADED_CODE 6
34 #define CTX_TGID_CODE 7
35 #define TRACE_BEGIN_CODE 8
36 #define TRACE_END_CODE 9
38 #define INVALID_COOKIE ~0UL
41 /* add data to the event buffer */
42 void add_event_entry(unsigned long data);
44 extern struct file_operations event_buffer_fops;
46 /* mutex between sync_cpu_buffers() and the
49 extern struct mutex buffer_mutex;
51 #endif /* EVENT_BUFFER_H */