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New empfile flag EFF_TYPED to signal struct empobj support

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Elements of tables with EFF_TYPED set share the common header of
struct empobj.
This commit is contained in:
Markus Armbruster 2008-02-24 10:06:01 +01:00
parent 49780e2c6c
commit d628679a24
2 changed files with 27 additions and 21 deletions
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15
include/file.h
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@ -71,18 +71,21 @@ struct empfile {
* The remaining flags record how the table is being used.
*/
/* Immutable flags, fixed at compile-time */
/* Table entries' addresses can't be safely cast to struct emptyped *. */
#define EFF_TYPED bit(0)
/*
* EFF_XY / EFF_OWNER / EFF_GROUP assert that coordinates / owner /
* group of such a table's entries can be safely obtained by
* dereferencing entry address cast to struct empobj *.
* dereferencing the entry's address cast to struct empobj *.
*/
#define EFF_XY bit(0)
#define EFF_OWNER bit(1)
#define EFF_GROUP bit(2)
#define EFF_XY bit(1)
#define EFF_OWNER bit(2)
#define EFF_GROUP bit(3)
/* Table is allocated statically */
#define EFF_STATIC bit(3)
#define EFF_STATIC bit(4)
/* All the immutable flags */
#define EFF_IMMUTABLE (EFF_XY | EFF_OWNER | EFF_GROUP | EFF_STATIC)
#define EFF_IMMUTABLE \
(EFF_TYPED | EFF_XY | EFF_OWNER | EFF_GROUP | EFF_STATIC)
/* Flags set when table contents is mapped */
/* Table is entirely in memory */
#define EFF_MEM bit(8)