/usr/include/syslog-ng/logqueue.h is in syslog-ng-dev 3.5.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2002-2011 BalaBit IT Ltd, Budapest, Hungary
* Copyright (c) 1998-2011 Balázs Scheidler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#ifndef LOGQUEUE_H_INCLUDED
#define LOGQUEUE_H_INCLUDED
#include "logmsg.h"
#include "stats.h"
extern gint log_queue_max_threads;
typedef void (*LogQueuePushNotifyFunc)(gpointer user_data);
typedef struct _LogQueue LogQueue;
struct _LogQueue
{
/* this object is reference counted, but it is _not_ thread safe to
acquire/release references in code executing in parallel */
gint ref_cnt;
gint throttle;
gint throttle_buckets;
GTimeVal last_throttle_check;
gchar *persist_name;
StatsCounterItem *stored_messages;
StatsCounterItem *dropped_messages;
GStaticMutex lock;
LogQueuePushNotifyFunc parallel_push_notify;
gpointer parallel_push_data;
GDestroyNotify parallel_push_data_destroy;
/* queue management */
gboolean (*keep_on_reload)(LogQueue *self);
gint64 (*get_length)(LogQueue *self);
void (*push_tail)(LogQueue *self, LogMessage *msg, const LogPathOptions *path_options);
void (*push_head)(LogQueue *self, LogMessage *msg, const LogPathOptions *path_options);
gboolean (*pop_head)(LogQueue *self, LogMessage **msg, LogPathOptions *path_options, gboolean push_to_backlog, gboolean ignore_throttle);
void (*ack_backlog)(LogQueue *self, gint n);
void (*rewind_backlog)(LogQueue *self);
void (*free_fn)(LogQueue *self);
};
static inline gboolean
log_queue_keep_on_reload(LogQueue *self)
{
if (self->keep_on_reload)
return self->keep_on_reload(self);
return TRUE;
}
static inline gint64
log_queue_get_length(LogQueue *self)
{
return self->get_length(self);
}
static inline void
log_queue_push_tail(LogQueue *self, LogMessage *msg, const LogPathOptions *path_options)
{
self->push_tail(self, msg, path_options);
}
static inline void
log_queue_push_head(LogQueue *self, LogMessage *msg, const LogPathOptions *path_options)
{
self->push_head(self, msg, path_options);
}
static inline gboolean
log_queue_pop_head(LogQueue *self, LogMessage **msg, LogPathOptions *path_options, gboolean push_to_backlog, gboolean ignore_throttle)
{
return self->pop_head(self, msg, path_options, push_to_backlog, ignore_throttle);
}
static inline void
log_queue_rewind_backlog(LogQueue *self)
{
return self->rewind_backlog(self);
}
static inline void
log_queue_ack_backlog(LogQueue *self, gint n)
{
return self->ack_backlog(self, n);
}
static inline LogQueue *
log_queue_ref(LogQueue *self)
{
self->ref_cnt++;
return self;
}
static inline void
log_queue_unref(LogQueue *self)
{
if (--self->ref_cnt == 0)
self->free_fn(self);
}
static inline void
log_queue_set_throttle(LogQueue *self, gint throttle)
{
self->throttle = throttle;
self->throttle_buckets = throttle;
}
void log_queue_push_notify(LogQueue *self);
void log_queue_reset_parallel_push(LogQueue *self);
void log_queue_set_parallel_push(LogQueue *self, LogQueuePushNotifyFunc parallel_push_notify, gpointer user_data, GDestroyNotify user_data_destroy);
gboolean log_queue_check_items(LogQueue *self, gint *timeout, LogQueuePushNotifyFunc parallel_push_notify, gpointer user_data, GDestroyNotify user_data_destroy);
void log_queue_set_counters(LogQueue *self, StatsCounterItem *stored_messages, StatsCounterItem *dropped_messages);
void log_queue_init_instance(LogQueue *self, const gchar *persist_name);
void log_queue_free_method(LogQueue *self);
void log_queue_set_max_threads(gint max_threads);
#endif
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