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   1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
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   3  * Copyright (c) 1993, 1994, 1995, 1996, 1997
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
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   8  * are met:
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  10  *    notice, this list of conditions and the following disclaimer.
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  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.
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  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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  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 LIBPCAP_EXPORTS
  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 LIBPCAP_EXPORTS
  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 */