[net-next-2.6.git] / drivers / oprofile / event_buffer.h

/**
 * @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 */
Commit	Line	Data
1da177e4 LT	1	/**
	2	* @file event_buffer.h
	3	*
	4	* @remark Copyright 2002 OProfile authors
	5	* @remark Read the file COPYING
	6	*
	7	* @author John Levon <levon@movementarian.org>
	8	*/
	9
	10	#ifndef EVENT_BUFFER_H
	11	#define EVENT_BUFFER_H
	12
	13	#include <linux/types.h>
	14	#include <asm/semaphore.h>
	15
	16	int alloc_event_buffer(void);
	17
	18	void free_event_buffer(void);
	19
	20	/* wake up the process sleeping on the event file */
	21	void wake_up_buffer_waiter(void);
	22
	23	/* Each escaped entry is prefixed by ESCAPE_CODE
	24	* then one of the following codes, then the
	25	* relevant data.
	26	*/
	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
	37
0c0a400d JL	38	#define INVALID_COOKIE ~0UL
	39	#define NO_COOKIE 0UL
	40
1da177e4 LT	41	/* add data to the event buffer */
	42	void add_event_entry(unsigned long data);
	43
	44	extern struct file_operations event_buffer_fops;
	45
	46	/* mutex between sync_cpu_buffers() and the
	47	* file reading code.
	48	*/
	49	extern struct semaphore buffer_sem;
	50
	51	#endif /* EVENT_BUFFER_H */