ComputerSurge/bind9
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add comments about 'RETAIN'

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This commit is contained in:
Michael Graff
2000-04-27 01:47:38 +00:00
parent 35a8d16d61
commit 1911100e64
1 changed files with 14 additions and 3 deletions
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17
lib/dns/rbtdb.c
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@@ -98,9 +98,18 @@ typedef struct rdatasetheader {
struct rdatasetheader *down;
} rdatasetheader_t;
#define RDATASET_ATTR_NONEXISTENT 0x01
#define RDATASET_ATTR_STALE 0x02
#define RDATASET_ATTR_IGNORE 0x04
#define RDATASET_ATTR_NONEXISTENT 0x0001
#define RDATASET_ATTR_STALE 0x0002
#define RDATASET_ATTR_IGNORE 0x0004
#define RDATASET_ATTR_RETAIN 0x0008
/*
* XXX
* When the cache will pre-expire data (due to memory low or other
* situations) before the rdataset's TTL has expired, it MUST
* respect the RETAIN bit and not expire the data until its TTL is
* expired.
*/
#undef IGNORE /* WIN32 winbase.h defines this. */
@@ -110,6 +119,8 @@ typedef struct rdatasetheader {
(((header)->attributes & RDATASET_ATTR_NONEXISTENT) != 0)
#define IGNORE(header) \
(((header)->attributes & RDATASET_ATTR_IGNORE) != 0)
#define RETAIN(header) \
(((header)->attributes & RDATASET_ATTR_RETAIN) != 0)
#define DEFAULT_NODE_LOCK_COUNT 7 /* Should be prime. */