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Text File | 1996-05-01 | 1.6 KB | 58 lines | [TEXT/MPS ] |
- /*
- File: Disks.idl
-
- Contains: Disk Driver Interfaces.
-
- Version: Technology: System 7.5
- Release: Universal Interfaces 3.0d3 on Copland DR1
-
- Copyright: © 1984-1996 by Apple Computer, Inc. All rights reserved.
-
- Bugs?: If you find a problem with this file, send the file and version
- information (from above) and the problem description to:
-
- Internet: apple.bugs@applelink.apple.com
- AppleLink: APPLE.BUGS
-
- */
- #ifndef __DISKS_IDL__
- #define __DISKS_IDL__
-
- #include <somobj.idl>
- #include <somcls.idl>
-
- #ifndef __TYPES_IDL__
- #include <Types.idl>
- #endif
- #ifndef __OSUTILS_IDL__
- #include <OSUtils.idl>
- #endif
-
- #ifdef __SOMIDL__
-
- /*
- Note:
-
- qLink is usually the first field in queues, but back in the MacPlus
- days, the DrvSts record needed to be expanded. In order to do this without
- breaking disk drivers that already added stuff to the end, the fields
- where added to the beginning. This was originally done in assembly language
- and the record was defined to start at a negative offset, so that the qLink
- field would end up at offset zero. When the C and pascal interfaces where
- made, they could not support negative record offsets, so qLink was no longer
- the first field. Universal Interfaces are auto generated and don't support
- negative offsets for any language, so DrvSts in Disks.a has qLinks at a
- none zero offset. Assembly code which switches to Universal Interfaces will
- need to compensate for that.
-
- */
- typedef SOMLargeStruct DrvSts; /* Derived from a struct of 22 bytes in size */
-
- typedef SOMLargeStruct DrvSts2; /* Derived from a struct of 29 bytes in size */
-
-
- #endif /* __SOMIDL__ */
-
- #endif /* __DISKS_IDL__ */
-
-