#include <db.h> int DB_MPOOLFILE->set_ftype(DB_MPOOLFILE *mpf, int ftype);
The DB_MPOOLFILE->set_ftype() method specifies a file type for the
purposes of input or output processing of the file's pages as they are
read from or written to, the backing filesystem store.
The DB_MPOOLFILE->set_ftype() method configures a file in the
cache, not only operations performed using the specified
DB_MPOOLFILE handle.
The DB_MPOOLFILE->set_ftype() method may not be called after the
DB_MPOOLFILE->open()
method is called. If the file is already open in the cache when
DB_MPOOLFILE->open() is
called, the information specified to DB_MPOOLFILE->set_ftype() will
replace the existing information.
The DB_MPOOLFILE->set_ftype()
method returns a non-zero error value on failure and 0 on success.
The ftype parameter sets the file's type for the purposes of input and output processing. The ftype must be the same as a ftype parameter previously specified to the DB_ENV->memp_register() method.