Berkeley DB: memp_fset

memp_fset

#include <db.h> int memp_fset(DB_MPOOLFILE *mpf, void *pgaddr, u_int32_t flags); Description The memp_fset function sets the flags associated with the page referenced by pgaddr without unpinning it from the pool. The pgaddr argument must be an address previously returned by memp_fget. The flags argument is specified by logically OR'ing together one or more of the following values: DB_MPOOL_CLEANClear any previously set modification information (i.e., 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. The memp_fset function returns the value of errno on failure, and 0 on success. Errors If a fatal error occurs in Berkeley DB, the memp_fset function may fail and return DB_RUNRECOVERY, at which point all subsequent database calls will also return DB_RUNRECOVERY. The memp_fset function may fail and return errno for any of the errors specified for the following Berkeley DB and C library functions: abort(3), fcntl(3), fflush(3), fprintf(3), getpid(3), vfprintf(3), and vsnprintf(3). In addition, the memp_fset function may fail and return errno for the following conditions: EINVAL An invalid flag value or parameter was specified. See Also memp_close, memp_fclose, memp_fget, memp_fopen, memp_fput, memp_fset, memp_fsync, memp_open, memp_register, memp_stat, memp_stat, memp_sync, memp_trickle and memp_unlink.