CreateLibraryTags

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Thu, 2013-01-24 22:34
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alfkil
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CreateLibraryTags

Does anyone have a working example of how to create a library with CreateLibraryTags?? I have successfully created two exec Interfaces (with MakeInterfaceTags), but when I call CreateLibraryTags, I get a NULL pointer no matter how hard I try... Help?

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Fri, 2013-01-25 09:52
salass00
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This is what I have in

This is what I have in cdplayer.library:

  1. /* Manager interface vectors */
  2. static CONST APTR lib_manager_vectors[] = {
  3. 	(APTR)_generic_Obtain,
  4. 	(APTR)_generic_Release,
  5. 	NULL,
  6. 	NULL,
  7. 	(APTR)libOpen,
  8. 	(APTR)libClose,
  9. 	(APTR)libExpunge,
  10. 	NULL,
  11. 	(APTR)-1
  12. };
  13.  
  14. /* "__library" interface tag list */
  15. static CONST struct TagItem lib_managerTags[] = {
  16. 	{ MIT_Name,        (Tag)"__library"         },
  17. 	{ MIT_VectorTable, (Tag)lib_manager_vectors },
  18. 	{ MIT_Version,     1                        },
  19. 	{ TAG_DONE,        0                        }
  20. };
  21.  
  22. STATIC CONST APTR main_vectors[] = {
  23. 	(APTR)_generic_Obtain,
  24. 	(APTR)_generic_Release,
  25. 	NULL,
  26. 	NULL,
  27. 	(APTR)_CDPlayer_CDEject,
  28. 	(APTR)_CDPlayer_CDPlay,
  29. 	(APTR)_CDPlayer_CDResume,
  30. 	(APTR)_CDPlayer_CDStop,
  31. 	(APTR)_CDPlayer_CDJump,
  32. 	(APTR)_CDPlayer_CDActive,
  33. 	(APTR)_CDPlayer_CDCurrentTitle,
  34. 	(APTR)_CDPlayer_CDTitleTime,
  35. 	(APTR)_CDPlayer_CDGetVolume,
  36. 	(APTR)_CDPlayer_CDSetVolume,
  37. 	(APTR)_CDPlayer_CDReadTOC,
  38. 	(APTR)_CDPlayer_CDInfo,
  39. 	(APTR)_CDPlayer_CDPlayAddr,
  40. 	(APTR)-1
  41. };
  42.  
  43. /* Uncomment this line (and see below) if your library has a 68k jump table */
  44. extern APTR VecTable68K[];
  45.  
  46. static CONST struct TagItem mainTags[] = {
  47. 	{ MIT_Name,        (Tag)"main"       },
  48. 	{ MIT_VectorTable, (Tag)main_vectors },
  49. 	{ MIT_Version,     1                 },
  50. 	{ TAG_DONE,        0                 }
  51. };
  52.  
  53. static CONST CONST_APTR libInterfaces[] = {
  54. 	lib_managerTags,
  55. 	mainTags,
  56. 	NULL
  57. };
  58.  
  59. static CONST struct TagItem libCreateTags[] = {
  60. 	{ CLT_DataSize,   sizeof(struct CDPlayerBase) },
  61. 	{ CLT_InitFunc,   (Tag)libInit                },
  62. 	{ CLT_Interfaces, (Tag)libInterfaces          },
  63. 	/* Uncomment the following line if you have a 68k jump table */
  64. 	{ CLT_Vector68K,  (Tag)VecTable68K            },
  65. 	{ TAG_DONE,       0                           }
  66. };

The libCreateTags is what is passed to CreateLibrary().

Note that unless you are creating a library in memory yourself you do not need to call CreateLibrary(Tags)() explicitly.

Note also that CreateLibrary() handles calling MakeInterface() for you for all the interfaces you specified with the CLT_Interfaces tag.

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Sun, 2013-01-27 00:02
(Reply to #2)
alfkil
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Joined: 2011-05-10 22:02
Thanks, I solved the problem:

Thanks, I solved the problem: I was creating the Interfaces with MakeInterface instead of just passing the Tags to CreateLibrary... Doh!

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