#include <db_cxx.h> int DbMpoolFile::set_flags(u_int32_t flags, bool onoff);
Configure a file in the cache.
To set the flags for a particular database, call the
DbMpoolFile::set_flags() method using the
DbMpoolFile handle stored
in the mpf field of the
Db handle.
The DbMpoolFile::set_flags()
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
The flags parameter must be set by bitwise inclusively OR'ing together one or more of the following values:
If set, no backing temporary file will be opened for the specified in-memory database, even if it expands to fill the entire cache. Attempts to create new database pages after the cache has been filled will fail.
The DB_MPOOL_NOFILE flag configures a file in the cache, not
only operations performed using the specified
DbMpoolFile handle.
The DB_MPOOL_NOFILE flag may be used to configure Berkeley DB at any
time during the life of the application.
DB_MPOOL_UNLINK
If set, remove the file when the last reference to it is closed.
The DB_MPOOL_ULINK flag configures a file in the cache, not
only operations performed using the specified
DbMpoolFile handle.
The DB_MPOOL_ULINK flag may be used to configure Berkeley DB at any
time during the life of the application.