1 //==========================================================================
5 // High-level file I/O support.
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors: gthomas
50 //####DESCRIPTIONEND####
52 //==========================================================================
57 #include <pkgconf/io.h>
58 #include <cyg/io/file.h>
59 #include <cyg/error/codes.h>
61 struct file fds[CYGPKG_IO_NFILE];
64 // This function allcates a file "slot".
67 falloc(struct file **fp, int *fd)
72 for (i = 0; i < CYGPKG_IO_NFILE; i++, f++) {
80 return EMFILE; // No more files
84 // This function is used to return a file slot.
87 ffree(struct file *fp)
89 fp->f_flag = 0; // Mark free
93 // This function provides the mapping from a file descriptor (small
94 // integer used by application code) to the corresponding file slot.
96 getfp(int fd, struct file **fp)
99 if (fd >= CYGPKG_IO_NFILE)