drivers/oprofile/event_buffer.h

   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/mutex.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 #define INVALID_COOKIE ~0UL
  24 #define NO_COOKIE 0UL
  25
  26 extern const struct file_operations event_buffer_fops;
  27
  28 /* mutex between sync_cpu_buffers() and the
  29  * file reading code.
  30  */
  31 extern struct mutex buffer_mutex;
  32
  33 #endif /* EVENT_BUFFER_H */