DB_MPOOLFILE->set
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#include <db.h>
int
DB_MPOOLFILE->set(DB_MPOOLFILE *mpf, void *pgaddr, u_int32_t flags);
Description: DB_MPOOLFILE->set
The DB_MPOOLFILE->set method sets the attributes of a cache page.
The DB_MPOOLFILE->set method
returns a non-zero error value on failure
and 0 on success.
Parameters
- pgaddr
- The pgaddr parameter is the address of the page for which
attributes are to be set. he pgaddr parameter must be an
address previously returned by DB_MPOOLFILE->get.
- flags
- The flags parameter must be set to 0 or by bitwise inclusively OR'ing together one
or more of the following values:
- DB_MPOOL_CLEAN
- Clear any previously set modification information (that is, don't bother
writing the page back to the source file).
- DB_MPOOL_DIRTY
- The page has been modified and must be written to the source file before
being evicted from the pool.
- DB_MPOOL_DISCARD
- The page is unlikely to be useful in the near future, and should be
discarded before other pages in the pool.
The DB_MPOOL_CLEAN and DB_MPOOL_DIRTY flags are mutually exclusive.
Errors
The DB_MPOOLFILE->set method
may fail and return one of the following non-zero errors:
- EINVAL
- An
invalid flag value or parameter was specified.
Class
DB_ENV, DB_MPOOLFILE
See Also
Memory Pools and Related Methods
Copyright (c) 1996-2005 Sleepycat Software, Inc. - All rights reserved.