e72e9355e3
git: https://android.googlesource.com/kernel/common branch: android-4.9 commit: 03fcc2fe71308c2d164b4e6cbfc738c63e670444
41 lines
860 B
C
41 lines
860 B
C
/**
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* @file event_buffer.h
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author John Levon <levon@movementarian.org>
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*/
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#ifndef EVENT_BUFFER_H
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#define EVENT_BUFFER_H
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#include <linux/types.h>
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#include <linux/mutex.h>
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int alloc_event_buffer(void);
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void free_event_buffer(void);
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/**
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* Add data to the event buffer.
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* The data passed is free-form, but typically consists of
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* file offsets, dcookies, context information, and ESCAPE codes.
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*/
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void add_event_entry(unsigned long data);
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/* wake up the process sleeping on the event file */
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void wake_up_buffer_waiter(void);
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#define INVALID_COOKIE ~0UL
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#define NO_COOKIE 0UL
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extern const struct file_operations event_buffer_fops;
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/* mutex between sync_cpu_buffers() and the
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* file reading code.
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*/
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extern struct mutex buffer_mutex;
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#endif /* EVENT_BUFFER_H */
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