diff options
Diffstat (limited to 'devio/open.h')
-rw-r--r-- | devio/open.h | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/devio/open.h b/devio/open.h deleted file mode 100644 index 80763585..00000000 --- a/devio/open.h +++ /dev/null @@ -1,73 +0,0 @@ -/* Per-open information for devio. - - Copyright (C) 1995 Free Software Foundation, Inc. - - Written by Miles Bader <miles@gnu.ai.mit.edu> - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, or (at - your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#ifndef __OPEN_H__ -#define __OPEN_H__ - -#include "iostate.h" - -/* ---------------------------------------------------------------- */ - -/* A structure describing a particular i/o stream on this device. */ -struct open -{ - /* Current state of our output stream -- location and the buffer used to do - buffered i/o. */ - struct io_state io_state; - - /* The memory window we're using to do i/o. This may be NULL, indicating - we're not doing buffered random access i/o. */ - struct window *window; - - /* The device that this an open on. */ - struct dev *dev; -}; - -/* Returns a new per-open structure for the device DEV in OPEN. If an error - occurs, the error-code is returned, otherwise 0. */ -error_t open_create(struct dev *dev, struct open **open); - -/* Free OPEN and any resources it holds. */ -void open_free(struct open *open); - -/* Returns the appropiate io_state object for OPEN (which may be either - per-open or a per-device depending on the device). */ -struct io_state *open_get_io_state(struct open *open); - -/* Writes up to LEN bytes from BUF to OPEN's device at device offset OFFS - (which may be ignored if the device doesn't support random access), - and returns the number of bytes written in AMOUNT. If no error occurs, - zero is returned, otherwise the error code is returned. */ -error_t open_write(struct open *open, vm_address_t buf, vm_size_t len, - vm_size_t *amount, off_t offs); - -/* Reads up to AMOUNT bytes from the device into BUF and BUF_LEN using the - standard mach out-array convention. If no error occurs, zero is returned, - otherwise the error code is returned. */ -error_t open_read(struct open *open, vm_address_t *buf, vm_size_t *buf_len, - vm_size_t amount, off_t offs); - -/* Set OPEN's location to OFFS, interpreted according to WHENCE as by seek. - The new absolute location is returned in NEW_OFFS (and may not be the same - as OFFS). If no error occurs, zero is returned, otherwise the error code - is returned. */ -error_t open_seek (struct open *open, off_t offs, int whence, off_t *new_offs); - -#endif /* !__OPEN_H__ */ |