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      1 /*
      2  * libjingle
      3  * Copyright 2004--2013, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 #ifndef TALK_MEDIA_WEBRTC_WEBRTCEXPORT_H_
     28 #define TALK_MEDIA_WEBRTC_WEBRTCEXPORT_H_
     29 
     30 #if !defined(GOOGLE_CHROME_BUILD) && !defined(CHROMIUM_BUILD)
     31 #define LIBPEERCONNECTION_LIB 1
     32 #endif
     33 
     34 #ifndef NON_EXPORTED_BASE
     35 #ifdef WIN32
     36 
     37 // MSVC_SUPPRESS_WARNING disables warning |n| for the remainder of the line and
     38 // for the next line of the source file.
     39 #define MSVC_SUPPRESS_WARNING(n) __pragma(warning(suppress:n))
     40 
     41 // Allows exporting a class that inherits from a non-exported base class.
     42 // This uses suppress instead of push/pop because the delimiter after the
     43 // declaration (either "," or "{") has to be placed before the pop macro.
     44 //
     45 // Example usage:
     46 // class EXPORT_API Foo : NON_EXPORTED_BASE(public Bar) {
     47 //
     48 // MSVC Compiler warning C4275:
     49 // non dll-interface class 'Bar' used as base for dll-interface class 'Foo'.
     50 // Note that this is intended to be used only when no access to the base class'
     51 // static data is done through derived classes or inline methods. For more info,
     52 // see http://msdn.microsoft.com/en-us/library/3tdb471s(VS.80).aspx
     53 #define NON_EXPORTED_BASE(code) MSVC_SUPPRESS_WARNING(4275) \
     54                                 code
     55 
     56 #else  // Not WIN32
     57 #define NON_EXPORTED_BASE(code) code
     58 #endif  // WIN32
     59 #endif  // NON_EXPORTED_BASE
     60 
     61 #if defined (LIBPEERCONNECTION_LIB)
     62   #define WRME_EXPORT
     63 #else
     64   #if defined(WIN32)
     65     #if defined(LIBPEERCONNECTION_IMPLEMENTATION)
     66       #define WRME_EXPORT __declspec(dllexport)
     67     #else
     68       #define WRME_EXPORT __declspec(dllimport)
     69     #endif
     70   #else // defined(WIN32)
     71     #if defined(LIBPEERCONNECTION_IMPLEMENTATION)
     72       #define WRME_EXPORT __attribute__((visibility("default")))
     73     #else
     74       #define WRME_EXPORT
     75     #endif
     76   #endif
     77 #endif  // LIBPEERCONNECTION_LIB
     78 
     79 #endif  // TALK_MEDIA_WEBRTC_WEBRTCEXPORT_H_
     80