tools/perf/util/ordered-events.h

   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
  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
  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 */