Fix: incorrect specifier %lu used with size_t argument
[lttng-tools.git] / src / common / consumer / consumer-metadata-cache.h
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331744e3 1/*
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2 * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
3 * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
331744e3 4 *
ab5be9fa 5 * SPDX-License-Identifier: GPL-2.0-only
331744e3 6 *
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7 */
8
9#ifndef CONSUMER_METADATA_CACHE_H
10#define CONSUMER_METADATA_CACHE_H
11
c8fea79c 12#include <common/consumer/consumer.h>
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13
14struct consumer_metadata_cache {
15 char *data;
16 uint64_t cache_alloc_size;
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17 /*
18 * Current version of the metadata cache.
19 */
20 uint64_t version;
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21 /*
22 * The upper-limit of data written inside the buffer.
23 *
24 * With the total_bytes_written it allows us to keep track of when the
25 * cache contains contiguous metadata ready to be sent to the RB.
c585821b 26 * All cached data is contiguous.
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27 */
28 uint64_t max_offset;
29 /*
30 * Lock to update the metadata cache and push into the ring_buffer
31 * (ustctl_write_metadata_to_channel).
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32 *
33 * This is nested INSIDE the consumer_data lock.
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34 */
35 pthread_mutex_t lock;
36};
37
38int consumer_metadata_cache_write(struct lttng_consumer_channel *channel,
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39 unsigned int offset, unsigned int len, uint64_t version,
40 char *data);
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41int consumer_metadata_cache_allocate(struct lttng_consumer_channel *channel);
42void consumer_metadata_cache_destroy(struct lttng_consumer_channel *channel);
43int consumer_metadata_cache_flushed(struct lttng_consumer_channel *channel,
5e41ebe1 44 uint64_t offset, int timer);
5b8eb761 45int consumer_metadata_wakeup_pipe(const struct lttng_consumer_channel *channel);
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46
47#endif /* CONSUMER_METADATA_CACHE_H */
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