+++ /dev/null
-/*
- * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
- * David Goulet <dgoulet@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef _STREAM_H
-#define _STREAM_H
-
-#include <limits.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <urcu/list.h>
-
-#include <common/hashtable/hashtable.h>
-
-#include "session.h"
-
-/*
- * Represents a stream in the relay
- */
-struct relay_stream {
- uint64_t stream_handle;
- uint64_t prev_seq; /* previous data sequence number encountered */
- struct lttng_ht_node_u64 node;
- /*
- * When we receive a stream, it gets stored in a list (on a per connection
- * basis) until we have all the streams of the same channel and the metadata
- * associated with it, then it gets flagged with viewer_ready.
- */
- struct cds_list_head recv_list;
-
- /* Added to the corresponding ctf_trace. */
- struct cds_list_head trace_list;
- struct rcu_head rcu_node;
- uint64_t session_id;
- int fd;
- /* FD on which to write the index data. */
- int index_fd;
- /* FD on which to read the index data for the viewer. */
- int read_index_fd;
-
- char *path_name;
- char *channel_name;
- /* on-disk circular buffer of tracefiles */
- uint64_t tracefile_size;
- uint64_t tracefile_size_current;
- uint64_t tracefile_count;
- uint64_t tracefile_count_current;
- /* To inform the viewer up to where it can go back in time. */
- uint64_t oldest_tracefile_id;
-
- uint64_t total_index_received;
- uint64_t last_net_seq_num;
-
- /*
- * To protect from concurrent read/update. Also used to synchronize the
- * closing of this stream.
- */
- pthread_mutex_t lock;
-
- /*
- * If the stream is inactive, this field is updated with the live beacon
- * timestamp end, when it is active, this field == -1ULL.
- */
- uint64_t beacon_ts_end;
- /*
- * CTF stream ID, -1ULL when unset.
- */
- uint64_t ctf_stream_id;
- /*
- * To protect the update of the close_write_flag and the checks of
- * the tracefile_count_current.
- * It is taken before checking whenever we need to know if the
- * writer and reader are working in the same tracefile.
- */
- pthread_mutex_t viewer_stream_rotation_lock;
-
- /* Information telling us when to close the stream */
- unsigned int close_flag:1;
- /*
- * Indicates if the stream has been effectively closed thus having the
- * information in it invalidated but NOT freed. The stream lock MUST be
- * held to read/update that value.
- */
- unsigned int terminated_flag:1;
- /* Indicate if the stream was initialized for a data pending command. */
- unsigned int data_pending_check_done:1;
- unsigned int metadata_flag:1;
- /*
- * To detect when we start overwriting old data, it is used to
- * update the oldest_tracefile_id.
- */
- unsigned int tracefile_overwrite:1;
- /*
- * Can this stream be used by a viewer or are we waiting for additional
- * information.
- */
- unsigned int viewer_ready:1;
-};
-
-struct relay_stream *stream_find_by_id(struct lttng_ht *ht,
- uint64_t stream_id);
-int stream_close(struct relay_session *session, struct relay_stream *stream);
-void stream_delete(struct lttng_ht *ht, struct relay_stream *stream);
-void stream_destroy(struct relay_stream *stream);
-
-#endif /* _STREAM_H */
projects / lttng-tools.git / blobdiff