1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ORDERED_EVENTS_H
3 #define __ORDERED_EVENTS_H
4
5 #include <linux/types.h>
6
7 struct perf_sample;
8
9 struct ordered_event {
10 u64 timestamp;
11 u64 file_offset;
12 union perf_event *event;
13 struct list_head list;
14 };
15
16 enum oe_flush {
17 OE_FLUSH__NONE,
18 OE_FLUSH__FINAL,
19 OE_FLUSH__ROUND,
20 OE_FLUSH__HALF,
21 OE_FLUSH__TOP,
22 OE_FLUSH__TIME,
23 };
24
25 struct ordered_events;
26
27 typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
28 struct ordered_event *event);
29
30 struct ordered_events_buffer {
31 struct list_head list;
32 struct ordered_event event[0];
33 };
34
35 struct ordered_events {
36 u64 last_flush;
37 u64 next_flush;
38 u64 max_timestamp;
39 u64 max_alloc_size;
40 u64 cur_alloc_size;
41 struct list_head events;
42 struct list_head cache;
43 struct list_head to_free;
44 struct ordered_events_buffer *buffer;
45 struct ordered_event *last;
46 ordered_events__deliver_t deliver;
47 int buffer_idx;
48 unsigned int nr_events;
49 enum oe_flush last_flush_type;
50 u32 nr_unordered_events;
51 bool copy_on_queue;
52 void *data;
53 };
54
55 int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
56 u64 timestamp, u64 file_offset);
57 void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
58 int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
59 int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp);
60 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
61 void *data);
62 void ordered_events__free(struct ordered_events *oe);
63 void ordered_events__reinit(struct ordered_events *oe);
64 u64 ordered_events__first_time(struct ordered_events *oe);
65
66 static inline
ordered_events__set_alloc_size(struct ordered_events * oe,u64 size)67 void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
68 {
69 oe->max_alloc_size = size;
70 }
71
72 static inline
ordered_events__set_copy_on_queue(struct ordered_events * oe,bool copy)73 void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
74 {
75 oe->copy_on_queue = copy;
76 }
77 #endif /* __ORDERED_EVENTS_H */
78