• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
2 /*
3  * Copyright (c) 1993, 1994, 1995, 1996, 1997
4  *	The Regents of the University of California.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by the Computer Systems
17  *	Engineering Group at Lawrence Berkeley Laboratory.
18  * 4. Neither the name of the University nor of the Laboratory may be used
19  *    to endorse or promote products derived from this software without
20  *    specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #ifndef lib_pcap_export_defs_h
36 #define lib_pcap_export_defs_h
37 
38 /*
39  * PCAP_API_DEF must be used when defining *data* exported from
40  * libpcap.  It can be used when defining *functions* exported
41  * from libpcap, but it doesn't have to be used there.  It
42  * should not be used in declarations in headers.
43  *
44  * PCAP_API must be used when *declaring* data or functions
45  * exported from libpcap; PCAP_API_DEF won't work on all platforms.
46  */
47 
48 /*
49  * Check whether this is GCC major.minor or a later release, or some
50  * compiler that claims to be "just like GCC" of that version or a
51  * later release.
52  */
53 #define IS_AT_LEAST_GNUC_VERSION(major, minor) \
54 	(defined(__GNUC__) && \
55 	    (__GNUC__ > (major) || \
56 	     (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
57 
58 #if defined(_WIN32)
59   #ifdef BUILDING_PCAP
60     /*
61      * We're compiling libpcap, so we should export functions in our
62      * API.
63      */
64     #define PCAP_API_DEF	__declspec(dllexport)
65   #else
66     #define PCAP_API_DEF	__declspec(dllimport)
67   #endif
68 #elif defined(MSDOS)
69   /* XXX - does this need special treatment? */
70   #define PCAP_API_DEF
71 #else /* UN*X */
72   #ifdef BUILDING_PCAP
73     /*
74      * We're compiling libpcap, so we should export functions in our API.
75      * The compiler might be configured not to export functions from a
76      * shared library by default, so we might have to explicitly mark
77      * functions as exported.
78      */
79     #if IS_AT_LEAST_GNUC_VERSION(3, 4)
80       /*
81        * GCC 3.4 or later, or some compiler asserting compatibility with
82        * GCC 3.4 or later, so we have __attribute__((visibility()).
83        */
84       #define PCAP_API_DEF	__attribute__((visibility("default")))
85     #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
86       /*
87        * Sun C 5.5 or later, so we have __global.
88        * (Sun C 5.9 and later also have __attribute__((visibility()),
89        * but there's no reason to prefer it with Sun C.)
90        */
91       #define PCAP_API_DEF	__global
92     #else
93       /*
94        * We don't have anything to say.
95        */
96       #define PCAP_API_DEF
97     #endif
98   #else
99     /*
100      * We're not building libpcap.
101      */
102     #define PCAP_API_DEF
103   #endif
104 #endif /* _WIN32/MSDOS/UN*X */
105 
106 #define PCAP_API	PCAP_API_DEF extern
107 
108 #endif /* lib_pcap_export_defs_h */
109