ordered-events.h

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ORDERED_EVENTS_H
#define __ORDERED_EVENTS_H

#include <linux/types.h>

struct perf_sample;

struct ordered_event {
    u64         timestamp;
    u64         file_offset;
    union perf_event    *event;
    struct list_head    list;
};

enum oe_flush {
    OE_FLUSH__NONE,
    OE_FLUSH__FINAL,
    OE_FLUSH__ROUND,
    OE_FLUSH__HALF,
};

struct ordered_events;

typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
                     struct ordered_event *event);

struct ordered_events {
    u64         last_flush;
    u64         next_flush;
    u64         max_timestamp;
    u64         max_alloc_size;
    u64         cur_alloc_size;
    struct list_head    events;
    struct list_head    cache;
    struct list_head    to_free;
    struct ordered_event    *buffer;
    struct ordered_event    *last;
    ordered_events__deliver_t deliver;
    int         buffer_idx;
    unsigned int        nr_events;
    enum oe_flush       last_flush_type;
    u32         nr_unordered_events;
    bool                    copy_on_queue;
};

int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
              u64 timestamp, u64 file_offset);
void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
void ordered_events__free(struct ordered_events *oe);
void ordered_events__reinit(struct ordered_events *oe);

static inline
void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
{
    oe->max_alloc_size = size;
}

static inline
void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
{
    oe->copy_on_queue = copy;
}
#endif /* __ORDERED_EVENTS_H */