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Berkeley DB: DB_MPOOLFILE->put
DB_MPOOLFILE->put
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#include <db.h>
int
DB_MPOOLFILE->put(DB_MPOOLFILE *mpf, void *pgaddr, u_int32_t flags);
Description: DB_MPOOLFILE->put
The DB_MPOOLFILE->put method returns a page to the cache.
The DB_MPOOLFILE->put method
returns a non-zero error value on failure
and 0 on success.
Parameters
- pgaddr
- The pgaddr parameter is the address of the page to be
returned to the cache. The 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->put method
may fail and return one of the following non-zero errors:
- EACCES
- The DB_MPOOL_DIRTY flag was set and the source file was not
opened for writing.
- EINVAL
- If the pgaddr parameter does not refer to a page returned by
DB_MPOOLFILE->get;
more than one of the DB_MPOOL_CLEAN and DB_MPOOL_DIRTY
flags was set; or if an
invalid flag value or parameter was specified.
Class
DB_ENV, DB_MPOOLFILE
See Also
Memory Pools and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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