PR_IMPLEMENT(PRStatus) _MD_UnlockFile(PRInt32 f)
PR_IMPLEMENT(PRStatus) _MD_getsysinfo(PRSysInfo cmd, char *name, PRUint32 namelen)
PR_IMPLEMENT(PRStatus)_MD_UnlockFile(PRInt32 f){    PRInt32 rv;    rv = lockf(f, F_ULOCK, 0);    if (rv == 0)        return PR_SUCCESS;    _PR_MD_MAP_LOCKF_ERROR(_MD_ERRNO());    return PR_FAILURE;}