/** * @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/mutex.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 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 */