+++ /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 _SESSION_H
-#define _SESSION_H
-
-#include <limits.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <urcu/list.h>
-
-#include <common/hashtable/hashtable.h>
-
-/*
- * Represents a session for the relay point of view
- */
-struct relay_session {
- /*
- * This session id is used to identify a set of stream to a tracing session
- * but also make sure we have a unique session id associated with a session
- * daemon which can provide multiple data source.
- */
- uint64_t id;
- char session_name[NAME_MAX];
- char hostname[HOST_NAME_MAX];
- uint32_t live_timer;
- struct lttng_ht_node_u64 session_n;
- struct rcu_head rcu_node;
- uint32_t stream_count;
- /* Tell if this session is for a snapshot or not. */
- unsigned int snapshot:1;
- /* Tell if the session has been closed on the streaming side. */
- unsigned int close_flag:1;
-
- /* Number of viewer using it. Set to 0, it should be destroyed. */
- int viewer_refcount;
-
- /* Contains ctf_trace object of that session indexed by path name. */
- struct lttng_ht *ctf_traces_ht;
-
- /*
- * Indicate version protocol for this session. This is especially useful
- * for the data thread that has no idea which version it operates on since
- * linking control/data sockets is non trivial.
- */
- uint64_t minor;
- uint64_t major;
- /*
- * Flag checked and exchanged with uatomic_cmpxchg to tell the
- * viewer-side if new streams got added since the last check.
- */
- unsigned long new_streams;
-
- /*
- * Used to synchronize the process where we flag every streams readiness
- * for the viewer when the streams_sent message is received and the viewer
- * process of sending those streams.
- */
- pthread_mutex_t viewer_ready_lock;
-
- /*
- * Member of the session list in struct relay_viewer_session.
- */
- struct cds_list_head viewer_session_list;
-};
-
-struct relay_viewer_session {
- struct cds_list_head sessions_head;
-};
-
-static inline void session_viewer_attach(struct relay_session *session)
-{
- uatomic_inc(&session->viewer_refcount);
-}
-
-static inline void session_viewer_detach(struct relay_session *session)
-{
- uatomic_add(&session->viewer_refcount, -1);
-}
-
-struct relay_session *session_find_by_id(struct lttng_ht *ht, uint64_t id);
-struct relay_session *session_create(void);
-int session_delete(struct lttng_ht *ht, struct relay_session *session);
-
-/*
- * Direct destroy without reading the refcount.
- */
-void session_destroy(struct relay_session *session);
-
-/*
- * Destroy the session if the refcount is down to 0.
- */
-void session_try_destroy(struct lttng_ht *ht, struct relay_session *session);
-
-/*
- * Decrement the viewer refcount and destroy it if down to 0.
- */
-void session_viewer_try_destroy(struct lttng_ht *ht,
- struct relay_session *session);
-
-#endif /* _SESSION_H */