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 };
  22
  23 struct ordered_events;
  24
  25 typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
  26                                          struct ordered_event *event);
  27
  28 struct ordered_events_buffer {
  29         struct list_head        list;
  30         struct ordered_event    event[0];
  31 };
  32
  33 struct ordered_events {
  34         u64                              last_flush;
  35         u64                              next_flush;
  36         u64                              max_timestamp;
  37         u64                              max_alloc_size;
  38         u64                              cur_alloc_size;
  39         struct list_head                 events;
  40         struct list_head                 cache;
  41         struct list_head                 to_free;
  42         struct ordered_events_buffer    *buffer;
  43         struct ordered_event            *last;
  44         ordered_events__deliver_t        deliver;
  45         int                              buffer_idx;
  46         unsigned int                     nr_events;
  47         enum oe_flush                    last_flush_type;
  48         u32                              nr_unordered_events;
  49         bool                             copy_on_queue;
  50 };
  51
  52 int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
  53                           u64 timestamp, u64 file_offset);
  54 void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
  55 int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
  56 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
  57 void ordered_events__free(struct ordered_events *oe);
  58 void ordered_events__reinit(struct ordered_events *oe);
  59
  60 static inline
  61 void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
  62 {
  63         oe->max_alloc_size = size;
  64 }
  65
  66 static inline
  67 void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
  68 {
  69         oe->copy_on_queue = copy;
  70 }
  71 #endif /* __ORDERED_EVENTS_H */