1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ORDERED_EVENTS_H
 3#define __ORDERED_EVENTS_H
 4
 5#include <linux/types.h>
 6
 7struct perf_sample;
 8
 9struct ordered_event {
10	u64			timestamp;
11	u64			file_offset;
12	union perf_event	*event;
13	struct list_head	list;
14};
15
16enum oe_flush {
17	OE_FLUSH__NONE,
18	OE_FLUSH__FINAL,
19	OE_FLUSH__ROUND,
20	OE_FLUSH__HALF,
21};
22
23struct ordered_events;
24
25typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
26					 struct ordered_event *event);
27
28struct ordered_events {
29	u64			last_flush;
30	u64			next_flush;
31	u64			max_timestamp;
32	u64			max_alloc_size;
33	u64			cur_alloc_size;
34	struct list_head	events;
35	struct list_head	cache;
36	struct list_head	to_free;
37	struct ordered_event	*buffer;
38	struct ordered_event	*last;
39	ordered_events__deliver_t deliver;
40	int			buffer_idx;
41	unsigned int		nr_events;
42	enum oe_flush		last_flush_type;
43	u32			nr_unordered_events;
44	bool                    copy_on_queue;
45};
46
47int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
48			  u64 timestamp, u64 file_offset);
49void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
50int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
51void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
52void ordered_events__free(struct ordered_events *oe);
53void ordered_events__reinit(struct ordered_events *oe);
54
55static inline
56void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
57{
58	oe->max_alloc_size = size;
59}
60
61static inline
62void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
63{
64	oe->copy_on_queue = copy;
65}
66#endif /* __ORDERED_EVENTS_H */