syslog-ng source
seqnum.h
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1 /*
2  * Copyright (c) 2002-2012 Balabit
3  * Copyright (c) 1998-2012 Balázs Scheidler
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  *
19  * As an additional exemption you are allowed to compile & link against the
20  * OpenSSL libraries as published by the OpenSSL project. See the file
21  * COPYING for details.
22  *
23  */
24 #ifndef SEQNUM_H_INLCLUDED
25 #define SEQNUM_H_INLCLUDED 1
26 
27 #include "syslog-ng.h"
28 
29 static inline void
30 init_sequence_number(gint32 *seqnum)
31 {
32  *seqnum = 1;
33 }
34 
35 static inline gint32
36 step_sequence_number(gint32 *seqnum)
37 {
38  gint32 old_value = *seqnum;
39  (*seqnum)++;
40  if (*seqnum < 0)
41  *seqnum = 1;
42  return old_value;
43 }
44 
45 static inline gint32
46 step_sequence_number_atomic(gint32 *seqnum)
47 {
48  return (gint32)g_atomic_int_add(seqnum, 1);
49 }
50 
51 
52 #endif