/** * @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 <linux/mutex.h> int alloc_event_buffer(void); void free_event_buffer(void); /** * Add data to the event buffer. * The data passed is free-form, but typically consists of * file offsets, dcookies, context information, and ESCAPE codes. */void add_event_entry(unsigned long data); /* wake up the process sleeping on the event file */void wake_up_buffer_waiter(void); #define INVALID_COOKIE ~0UL#define NO_COOKIE 0UL extern const struct file_operations event_buffer_fops; /* mutex between sync_cpu_buffers() and the * file reading code. */extern struct mutex buffer_mutex; #endif /* EVENT_BUFFER_H */