LXR linux/drivers/oprofile/event

   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 <linux/mutex.h>
  15
  16int alloc_event_buffer(void);
  17
  18void free_event_buffer(void);
  19
  20/**
  21 * Add data to the event buffer.
  22 * The data passed is free-form, but typically consists of
  23 * file offsets, dcookies, context information, and ESCAPE codes.
  24 */
  25void add_event_entry(unsigned long data);
  26
  27/* wake up the process sleeping on the event file */
  28void wake_up_buffer_waiter(void);
  29
  30#define INVALID_COOKIE ~0UL
  31#define NO_COOKIE 0UL
  32
  33extern const struct file_operations event_buffer_fops;
  34
  35/* mutex between sync_cpu_buffers() and the
  36 * file reading code.
  37 */
  38extern struct mutex buffer_mutex;
  39
  40#endif /* EVENT_BUFFER_H */
  41