da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/***********************************************************************
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* This software is part of the ast package *
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner* Copyright (c) 1985-2010 AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* and is licensed under the *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Common Public License, Version 1.0 *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin* by AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* A copy of the License is available at *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Information and Software Systems Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* AT&T Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Florham Park NJ *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Glenn Fowler <gsf@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* David Korn <dgk@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Phong Vo <kpv@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin***********************************************************************/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Discipline to turn on direct IO capability.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin** This currently only works for XFS on SGI's.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin** Written by Kiem-Phong Vo, kpv@research.att.com, 03/18/1998.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* convert a pointer to an int */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic ssize_t diordwr(Sfio_t* f, Void_t* buf, size_t n, Direct_t* di, int type)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (f->here%di->dio.d_miniosz) == 0 && n >= di->dio.d_miniosz )
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { /* direct IO ok, make sure we're in the right mode */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { /* turn off directIO for remaining IO operation */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#endif /*F_DIOINFO*/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin (rv = type == SF_READ ? read(f->file,buf,rw) : write(f->file,buf,rw)) > 0 )
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic ssize_t dioread(Sfio_t* f, Void_t* buf, size_t n, Sfdisc_t* disc)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic ssize_t diowrite(Sfio_t* f, const Void_t* buf, size_t n, Sfdisc_t* disc)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return diordwr(f, (Void_t*)buf, n, (Direct_t*)disc, SF_WRITE);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic int dioexcept(Sfio_t* f, int type, Void_t* data, Sfdisc_t* disc)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return -1;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return -1;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return -1;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return -1;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return -1;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#endif /*F_DIOINFO*/