+++ /dev/null
-/*
- * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
- * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#ifndef CONSUMER_METADATA_CACHE_H
-#define CONSUMER_METADATA_CACHE_H
-
-#include <common/consumer/consumer.h>
-#include <common/dynamic-buffer.h>
-
-enum consumer_metadata_cache_write_status {
- CONSUMER_METADATA_CACHE_WRITE_STATUS_ERROR = -1,
- /*
- * New metadata content was appended to the cache successfully.
- * Previously available content remains valid.
- */
- CONSUMER_METADATA_CACHE_WRITE_STATUS_APPENDED_CONTENT = 0,
- /*
- * The new content pushed to the cache invalidated the content that
- * was already present. The contents of the cache should be re-read.
- */
- CONSUMER_METADATA_CACHE_WRITE_STATUS_INVALIDATED,
- /*
- * A metadata cache write can simply overwrite an already existing
- * section of the cache (and it should be a write-through with identical
- * data). From the caller's standpoint, there is no change to the state
- * of the cache.
- */
- CONSUMER_METADATA_CACHE_WRITE_STATUS_NO_CHANGE,
-};
-
-struct consumer_metadata_cache {
- /* Current version of the metadata cache. */
- uint64_t version;
- /*
- * Size is the upper-limit of data written inside the buffer.
- * All cached data is contiguous.
- */
- struct lttng_dynamic_buffer contents;
- /*
- * Lock to update the metadata cache and push into the ring_buffer
- * (ustctl_write_metadata_to_channel).
- *
- * This is nested INSIDE the consumer_data lock.
- */
- pthread_mutex_t lock;
-};
-
-enum consumer_metadata_cache_write_status
-consumer_metadata_cache_write(struct consumer_metadata_cache *cache,
- unsigned int offset, unsigned int len, uint64_t version,
- const char *data);
-int consumer_metadata_cache_allocate(struct lttng_consumer_channel *channel);
-void consumer_metadata_cache_destroy(struct lttng_consumer_channel *channel);
-int consumer_metadata_cache_flushed(struct lttng_consumer_channel *channel,
- uint64_t offset, int timer);
-
-#endif /* CONSUMER_METADATA_CACHE_H */