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JACK API headers
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headers/weakmacros.h

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  1. /*

  2.     Copyright (C) 2010 Paul Davis

  3.     

  4.     This program is free software; you can redistribute it and/or modify

  5.     it under the terms of the GNU Lesser General Public License as published by

  6.     the Free Software Foundation; either version 2.1 of the License, or

  7.     (at your option) any later version.

  8.     

  9.     This program is distributed in the hope that it will be useful,

  10.     but WITHOUT ANY WARRANTY; without even the implied warranty of

  11.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12.     GNU Lesser General Public License for more details.

  13.     

  14.     You should have received a copy of the GNU Lesser General Public License

  15.     along with this program; if not, write to the Free Software 

  16.     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

  17. 

  18. */

  19. 

  20. #ifndef __weakmacros_h__

  21. #define __weakmacros_h__

  22. 

  23. /*************************************************************

  24.  * NOTE: JACK_WEAK_EXPORT ***MUST*** be used on every function

  25.  * added to the JACK API after the 0.116.2 release.

  26.  * 

  27.  * Functions that predate this release are marked with 

  28.  * JACK_WEAK_OPTIONAL_EXPORT which can be defined at compile

  29.  * time in a variety of ways. The default definition is empty,

  30.  * so that these symbols get normal linkage. If you wish to

  31.  * use all JACK symbols with weak linkage, include 

  32.  * <jack/weakjack.h> before jack.h.

  33.  *************************************************************/

  34. 

  35. #ifdef __APPLE__

  36. #define WEAK_ATTRIBUTE weak_import

  37. #else

  38. #define WEAK_ATTRIBUTE __weak__

  39. #endif

  40. 

  41. #ifndef JACK_WEAK_EXPORT

  42. #ifdef __GNUC__

  43. /* JACK_WEAK_EXPORT needs to be a macro which

  44.    expands into a compiler directive. If non-null, the directive 

  45.    must tell the compiler to arrange for weak linkage of 

  46.    the symbol it used with. For this to work full may

  47.    require linker arguments in the client as well.

  48. */

  49. #define JACK_WEAK_EXPORT __attribute__((WEAK_ATTRIBUTE))

  50. #else

  51. /* Add other things here for non-gcc platforms */

  52. #endif

  53. #endif

  54. 

  55. #ifndef JACK_OPTIONAL_WEAK_EXPORT

  56. #define JACK_OPTIONAL_WEAK_EXPORT

  57. #endif

  58. 

  59. #ifndef JACK_OPTIONAL_WEAK_DEPRECATED_EXPORT

  60. #ifdef __GNUC__

  61. #define JACK_OPTIONAL_WEAK_DEPRECATED_EXPORT __attribute__((__deprecated__))

  62. #else

  63. /* Add other things here for non-gcc platforms */

  64. #endif /* __GNUC__ */

  65. #endif

  66. 

  67. #endif /* __weakmacros_h__ */